EXHIBIT 10.1


                            RATE REDUCTION AGREEMENT
                            ------------------------

     Staff of the Arizona  Corporation  Commission  (Staff)  and Arizona  Public
Service Company (APS or Company) agree:

     1.  APS will  implement a first year average  3.25% base rate  reduction of
         $48.3  million,  based on retail  sales to and revenues  from  eligible
         customers for the adjusted test year ended July 1, 1995. See Attachment
         1 for  details of the  calculation.  Such rate  reduction  will  become
         effective July 1, 1996 or immediately upon a Commission order approving
         the Plan  whichever  is later.  Such rate  reduction  will be allocated
         among customers by means of the  0.299(cent)/kWh  reduction as shown in
         Attachment  1 by  reducing  energy  charges  for all  current  APS rate
         schedules except those set forth in Attachment 2.

     2.  In order to provide  customers with the  opportunity  for further price
         reductions, while maintaining its financial stability, the Company must
         continue  to lower its average  cost/kWh.  To the extent the Company is
         successful,   customers  and  shareholders  will  benefit.   Each  year
         following the initial rate reduction  described in Paragraph 1, through
         and including July 1, 1999 (the "Moratorium  Period"),  APS rates would
         be subject to a reduction in base rates  determined as follows:  if the
         average  price/kWh   exceeds  the  average  cost/kWh,   as  defined  in
         Attachment 3, based on results of operations for the preceding calendar
         year,  then 55% of the  difference  will be reflected as a reduction in
         base rates effective July 1 of the current year. After giving effect to
         the  consolidation,  elimination and  restructuring of certain existing
         rate offerings as discussed  below,  any net revenue  decrease would be
         allocated among customers by means of a uniform(cent)/kWh  reduction in
         the energy charges for all current APS rate schedules, except those set
         forth in Attachment 2. In any year, if the average cost/kWh is equal to
         or exceeds the average  price/kWh,  there would be no further change in
         base rates  (neither a decrease  nor an increase in base rates for that
         year).

     3.  Under  the  Plan,  certain  regulatory  assets  will  be  recovered  by
         accelerating  their  amortization  over an eight year period commencing
         July 1, 1996. These assets are primarily cost deferrals from Palo Verde
         Units 2 and 3, that were recorded under ACC approved accounting orders,
         and regulatory  assets to cover future income tax liabilities  recorded
         in 1993 as a result of implementing  Financial  Accounting Standard No.
         109 with respect to deferred income taxes.  This  amortization  will be
         included in the  calculation of the average  cost/kWh.  The accelerated
         amortization  approved  in  this  proceeding  is  for  the  purpose  of
         settlement  and  anticipates  the  transition   period  toward  a  more
         competitive  marketplace.  Further,  APS  agrees  that the  accelerated
         amortization  of these  regulatory  assets cannot be used as a separate
         justification  for a net rate  increase in any future rate  proceeding.
         Finally,  at the end of the Moratorium  Period, the accelerated rate of
         amortization will continue until further order of the Commission.

     4.  The  determination  of the  reduction to base rates for the  succeeding
         years will be determined  pursuant to the Company's  calculation of the
         average price and cost/kWh  using data from the prior  calendar year. A
         filing  of this  calculation  will be made on or about  March 1 of each
         year for Staff review and approval.  The reduction for the current year
         will  automatically  become  effective  for  usage on or after  July 1,
         unless the Commission orders a hearing, which would automatically delay
         its effective date until a final order is issued.

     5.  To  improve  the  Company's  equity  ratio in  anticipation  of greater
         competition, Pinnacle West Capital Corporation will infuse $200 million
         of common equity, in $50 million increments, by each year-end beginning
         in 1996, into APS with such infusion to be included in calculating each
         year's average cost/kWh under this Agreement.

     6.  During the Moratorium  Period,  no party shall seek to change the rates
         except as set forth  specifically in this Agreement.  However,  neither
         APS nor Staff shall be  prevented  from seeking a change in rates prior
         to July 2, 1999 in the event of: (a) conditions or circumstances  which
         constitute an emergency, such as the inability to finance on reasonable
         terms,  or (b) material  changes in the Company's  cost of service as a
         result  of   federal,   tribal,   state  or  local   laws,   regulatory
         requirements, judicial decisions, actions, or orders.

     7.  The parties agree to the following  revisions of current rate schedules
         and new tariffs:

         a.   Approval  of a flexible  contracting  schedule,  Rate  E-36,  that
              permits APS to contract with individual  customers on price, terms
              and conditions of service.  Contracts negotiated under this tariff
              would be supplied  under strict  confidentiality  to ACC Staff for
              their approval  within 30 days of submission.  This schedule would
              provide APS the ability to expeditiously and effectively price its
              services  to  individual  customers  to retain  and grow its load.
              Schedule  E-36,  as shown on  Attachment 4, shall also include the
              following provisions:

              *    The negotiated  rate must be  commensurate  with the costs to
                   the customer of that customer's alternative(s).

              *    APS must file each contract with Staff at least 30 days prior
                   to the  effective  date of the  proposed  contract  and Staff
                   shall determine whether the contract complies with the tariff
                   prior  to the  effective  date.  APS  must  provide  adequate
                   documentation on each element of the tariff (for example, the
                   customer's  alternatives)  before  the 30 day  review  period
                   commences.

              *    The customer  must agree to an energy audit or review  unless
                   the customer has recently completed a significant demand side
                   management  program or energy  audit/review  and provides APS
                   with  adequate  documentation   concerning  the  demand  side
                   management activities or audit/review.

              *    For  contracts  whose terms  extend  beyond the date when APS
                   will need to add capacity,  marginal cost shall mean long run
                   marginal cost.

              In addition,  the last sentence under service  billing on Schedule
              E-36 shall be  revised to read:  "The  revenue  from the  customer
              shall exceed the marginal cost of serving that customer."

         b.   The  Company  shall  retain  the right to propose  for  Commission
              approval during the Moratorium Period new or revised rate designs.
              Examples of this type of filing might be:

              i.   Revise the time-of-use (TOU) pricing periods and prices (both
                   residential   and  general   service)  once  advanced   meter
                   communications systems are in place.

              ii.  Establish  a  real-time  pricing  experiment  or  operational
                   program.

              iii. Unbundle  retail  rates  to  provide  customers   alternative
                   service options.

     8.  The parties agree to the following  changes to current rate  schedules.
         These  changes  are  designed to more  accurately  reflect the costs to
         serve,  promote  fairness among similar  customer  groups,  and improve
         customer  understanding  and  acceptability  of the pricing,  terms and
         conditions of the tariffs.

         a.   Revise  Schedule #1, General Terms and  Conditions of Service,  so
              that  credit and  collections  practices  and  charges  fairly and
              properly  collect  costs from  customers who impose those costs on
              APS without subsidies from other customers. The parties also agree
              to other minor  changes to clarify  current  practices and service
              specifications.   These   proposed   changes  are   summarized  in
              Attachment 5.

         b.   Revise   partial   requirements   provisions   of  the  tariff  to
              consistently  and fairly charge for services  provided.  APS has a
              variety  of  rates   applicable   to  various   types  of  partial
              requirements  customers  and these are  proposed  to be revised to
              apply market-based charges for standby, and cost-based charges for
              supplemental  and  maintenance   service.   The  proposed  tariffs
              (Schedules E-55 and E-52) are attached as Attachment 6.

              Schedules E-55 and E-52 shall:

              *    indicate that the customer  designates  the amount of standby
                   capacity  he or she wants in  setting  the  contract  standby
                   capacity  and  that  the  capacity  could  be less  than  the
                   capacity of the self generation facility.

              In addition,  APS shall  review  whether the  potential  for lower
              rates for a customer with a capacity factor  consistently below 75
              percent  (relative to a customer with a higher capacity factor) is
              in need of correction or clarification.

              Schedule E-51 shall be frozen to new and reconnecting customers.

         c.   EPR-1, -2, and -3, purchase rates for small qualified cogeneration
              customers,  would be revised to reflect  current  buy-back  rates,
              current metering  technology and establish  consistency  among the
              rates.  Schedule EPR-4 shall reference  schedules for sales to the
              customer.  In addition,  Schedule  EPR-2 shall offer an option for
              the incremental  cost of the  bidirectional  meter to be paid in a
              lump sum or in monthly  installments over a specified time period.
              Schedule  EPR-1 will be  cancelled.  Proposed  tariffs  (Schedules
              EPR-2, EPR-3, and EPR-4) are attached as Attachment 7.

         d.   Eliminate  extra-small  general  service Rate E-31 and incorporate
              E-31 into Schedule E-32 so that the monthly  service  charge under
              the new Schedule  E-32 is $12.50,  and the energy charge (prior to
              application of the rate decrease) is increased by $0.00024 per kWh
              for all kWh.

     9.  The  electric  base rates  proposed to be effective in 1996 include the
         costs  associated  with   depreciation  and   decommissioning   expense
         schedules  currently  being used by APS. The results of any future Palo
         Verde  decommissioning  cost or plant  depreciation  studies  completed
         during the Moratorium Period would be reflected in the average cost/kWh
         used in the calculation of additional base rate reductions described in
         Paragraph  2.  Any  depreciation  or  decommissioning  study  would  be
         reviewed  by Staff and the new  schedules  derived  therefrom  would be
         authorized and approved in accordance with the procedure established in
         Section 13.H of Decision No. 58644.

     10. APS'  commitment to foster  investment in DSM and renewables  continues
         and shall be implemented as follows:

         a.   The EEASE fund shall be  eliminated.  Any  over-recovery  shall be
              refunded to customers through a one-time refund within 120 days of
              the effective date of the Commission's order.

         b.   A total of $7 million  will be  included  in base rates for demand
              side management (DSM)and renewables.  Of the $7 million total, APS
              shall  undertake  at least $3 million of  renewables  programs per
              year on  average  and at  least  $3  million  of DSM  per  year on
              average.  APS shall  spend at least $7 million per year on DSM and
              renewables  projects  consistent  with this  Paragraph  10. If APS
              spends  less than $7  million  on  renewables  and DSM per year on
              average, the Commission, at the next rate case, shall review these
              expenditures  and may  order  appropriate  refunds  to  ratepayers
              taking  into  consideration  any  sharing  that has  occurred as a
              result of paragraph 2.

         c.   APS shall  move to phase out  consumer  rebate  DSM  programs  for
              customers and instead substitute shareholder-funded,  market-based
              DSM programs for larger customers and, for all customers,  develop
              and implement  ratepayer-funded  market transformation  activities
              (such as trade ally  programs  or  consumer  education  programs).
              However,  costs  (including  incentives and net lost revenues) for
              existing and approved  customer  rebate programs shall be included
              in the  calculation of the Company's $7 million  obligation  under
              this paragraph until such programs have been phased out. APS shall
              evaluate the effectiveness of market transformation programs.

         d.   APS shall continue its low income DSM program (at least at current
              levels),  complete current monitoring and evaluation  commitments,
              and  fulfill   outstanding   commitments   under  existing  rebate
              programs.

         e.   APS shall prepare an administrative  and  implementation  plan for
              Staff  review and  approval  for its DSM and  renewables  programs
              within  six months of the  effective  date of this  decision.  APS
              shall prepare  proposals for new DSM and  renewables  programs for
              Staff review and approval.

         f.   APS shall  file  detailed  semi-annual  reports  with Staff and in
              Docket  Control  on all DSM and  renewables  activities,  although
              confidential information need not be filed in Docket Control.

     11. APS recognizes that the  jurisdictional  portion of any net refund that
         it  receives as a result of  disposition  of the  property  tax lawsuit
         (Tucson Electric Power v. Apache County,  175 Ariz. 485 (App. 1995)) is
          --------------------------------------
         owed to its  customers,  since these taxes were collected from and paid
         by customers to APS through  rates.  Therefore,  APS will refund to its
         customers the net jurisdictional amount of overcollected property taxes
         that are  refunded to APS by the State of  Arizona.  APS agrees to work
         cooperatively  with  Staff to  determine  the  amount of any refund and
         method for returning the refund to customers.

     12. The rates and charges  authorized  herein fully include a return on the
         recorded book original  cost of all  jurisdictional  APS assets (net of
         depreciation,   amortization,  and  deferred  income  taxes  and  other
         deferred credits) as of June 30, 1995,  excepting  construction work in
         progress as of such date.  However,  nothing in this Agreement shall be
         construed  as  prohibiting  Staff or any other party from  pursuing new
         issues  related to  expenditures  made or actions  taken after June 30,
         1995.

     13. Staff and APS stipulate to the adoption of the fair value rate base and
         fair rate of return and agree that the resultant revenue  decrease,  as
         reflected in Paragraph 1 above,  results in just and  reasonable  rates
         for the Company.  The  determinations  made in this  Paragraph are made
         solely for the purpose of the stipulation contained in this Agreement.

     14. Each provision of this Agreement is in consideration and support of all
         the other  provisions.  This Agreement shall not become effective until
         the  issuance of a final  Commission  Order  approving  this  Agreement
         without change or alteration on or before July 1, 1996 in the form of a
         Proposed  Order to be agreed to by the  parties.  In the event that the
         Commission  fails to adopt this Agreement  according to its terms on or
         before  July 1,  1996,  this  Agreement  shall be deemed  automatically
         withdrawn,  the rate reduction  provisions of this Agreement  shall not
         take effect, and APS and Staff shall be free to pursue their respective
         positions  without  prejudice.  In addition,  if any appeal is taken or
         other judicial review is sought of a final  Commission  Order approving
         this Agreement,  then the parties shall no longer be bound by the terms
         of this Agreement and this Agreement  shall  automatically  become null
         and void, in which case: (1) the rate reduction  specified in Paragraph
         1 shall immediately cease; (2) all bills rendered on or after that date
         shall be at the rates existing  immediately  prior to the  Commission's
         approval of this Agreement;  and (3) the revenue reduction  theretofore
         experienced by APS pursuant to Paragraph 1 shall be recovered through a
         surcharge mechanism.

     15. The terms and  provisions  of this  Agreement  apply  solely to and are
         binding  only  in the  context  of the  purposes  and  results  of this
         Agreement and none of the positions taken herein by APS may be referred
         to, cited or relied upon by any other party in any fashion as precedent
         or  otherwise in any other  proceeding  before this  Commission  or any
         other  regulatory  agency  or before  any court of law for any  purpose
         except in  furtherance  of the purposes and results of this  Agreement.
         Nothing in this  Agreement  shall be construed as imposing a cap on the
         Company's otherwise reasonable and prudent cost of service for purposes
         of setting just and reasonable rates.

     16. This  Agreement  represents an attempt to compromise  and settle issues
         regarding the prospective  just and reasonable rate levels for APS in a
         manner  consistent  with  the  public  interest  and  applicable  legal
         requirements.  Nothing  contained in this  Agreement is an admission by
         APS  that  its  current  rate  levels  or rate  design  are  unjust  or
         unreasonable.

     17. APS'  agreement  to the matters  contained  herein is  predicated  on a
         national movement toward competition in the electricity industry.  That
         movement  raises a number of policy and legal  issues in Arizona  which
         are summarized (not necessarily  completely) in the Points of Agreement
         (Attachment 8). APS has its own views, independent of any the Staff may
         have, of the proper  resolution  of certain of the issues  presented in
         the Points of Agreement. Such views are summarized in Attachment 9.

         Dated at Phoenix,  Arizona,  this 4th day of December 1995.



    STAFF OF ARIZONA                            ARIZONA PUBLIC SERVICE
    CORPORATION COMMISSION                      COMPANY

    By: Gary Yaquinto                           By: William J. Post
       --------------------------------            -----------------------------

    Title: Director, Utilities Division         Title: Senior Vice President &
           ----------------------------                -------------------------
                                                       Chief Operating Officer
                                                       -------------------------



Attachment 1


Calculation of Base Rate Reduction
(Test Year Ended 6/30/95)


(1) Adjusted Base Revenues                                $   1,485.1   Million

(2) 3.25% Base Rate Reduction [(1) x 3.25%]               $      48.3   Million

(3) Electric Sales Subject to Decrease                         16,152   GWh

(4) Base Rate Decrease Factor [(2) / (3)]                 $   0.00299   per kWh

(5) EEASE Roll-in Factor at $10 Million/year  /a/         $   0.00058   per kWh

(6) Net Base Rate Decrease Factor [(4) - (5)]             $   0.00241   per kWh



 /a/  $10 million divided by the electric sales subject to EEASE (17,143.2 GWh).




                                  ATTACHMENT 2







                                  Attachment 2

                           Rates and Contracts Exempt
                          From General Rate Decreases


1. Rate E-67, Municipal Lighting Service -- City of Phoenix

2. Cyprus Copper Company Contract

3. El Paso Natural Gas (Leupp and Seligman) Contract

4. Magma Copper Company Contract

5. Phelps Dodge Contract

6. Stone Southwest Contract

7. Contracts under proposed Rate E-36

8. Future ACC approved  contracts with pricing  provisions that exempt them from
   general rate decreases.

These rates and contracts are already  discounted or have fixed rate  provisions
and will not be  subject  to the  general  price  decreases  resulting  from the
operation of the Plan unless so specified by contract.




                                  ATTACHMENT 3






                                  Attachment 3

                Unit Cost Ratio and Unit Price Ratio Definitions
(The revenues and costs to be utilized in this calculation will be derived from
            the actual audited financial statements of the Company)


Unit Cost Ratio (UCR): Annual  cents-per-kilowatt-hour  average cost of electric
                       services.

         UCR =   Annual total electric costs     (1)
                ------------------------------------
                 Annual total Company kwh sales  (2)


Unit Price Ratio (UPR): Annual cents-per-kilowatt-hour average price of electric
                        services.

         UPR =   Annual electric revenues        (3)
                ------------------------------------
                 Annual total Company kwh sales  (2)



1.       Excludes sales taxes (as in the case of the income statement),  all ITC
         amortization  (as required by federal tax laws),  annual  Pinnacle West
         charges  net of costs  for  shareholder  services,  fuel  expenses  for
         non-traditional and interchange sales (generally defined as opportunity
         sales  which  are  cost  justified  on  an  incremental   basis),   and
         non-utility  income or  deductions  and  related  income  tax  effects.
         Includes   fuel,   operations   and   maintenance,   depreciation   and
         amortization  (including  the  accelerated  amortization  of regulatory
         assets),  property  and other  taxes,  cost of capital  (consisting  of
         long-term interest; debt discount, premium and expense; preferred stock
         dividend requirements;  and a return on equity of 11.25% applied to the
         average   annual   equity   balance),   the  gross  profit   margin  on
         non-traditional  and interchange sales, DSM and renewable  expenditures
         (including  net lost  revenues  and  incentives),  and income  taxes on
         Operating  Income  including  adjustments to income taxes for the above
         exclusions and inclusions.

2.       Excludes kwh sales for non-traditional and interchange sales.

3.       Includes miscellaneous  revenues.  Excludes sales taxes (as in the case
         of the income statement) and non-traditional and interchange revenues.


                                  ATTACHMENT 4





                                                                            E-36
                                 ELECTRIC RATES
                                 --------------


ARIZONA PUBLIC SERVICE COMPANY                       A.C.C. No. 5223
Phoenix, Arizona                                     Tariff or Schedule No. E-36
Filed by:  Gary J. Volkenant                         Original Filing
Title:  Director, Business Financial Services        Effective:
Original Effective Date:

                              FLEXIBLE CONTRACTING
                              --------------------

APPLICATION
- -----------

Qualified customers must:

1.  Maintain a single  billing  account with an annual  average  metered  demand
    greater than 2,000 kW, or
2.  Have single billing  accounts with annual average  metered  demands  greater
    than 50 kW that, when combined, are greater than 2,000 kW, and
3.  Agree to an  energy  audit or  review,  unless  the  customer  has  recently
    completed  a   significant   demand  side   management   program  or  energy
    audit/review and provides APS with adequate documentation  concerning demand
    side management activities or audit/review, and
4.  Have or may acquire a competitive  alternative to receiving electric service
    at APS' otherwise effective price, or
5.  Have  the  ability  to  acquire  all  or  part  of  their  electric  service
    requirements from an alternate supplier, or
6.  Desire a long-term contract for electric service.


SERVICE BILLING
- ---------------

Only individual  billing accounts meeting the above criteria can be served under
Rate  E-36.  The  negotiated  price must be  commensurate  with the costs to the
customer of that customer's current or potential  alternative(s).  Prices may be
revised  periodically  as  specified  in the  service  contract  to account  for
changing conditions,  costs, and individual customer  requirements.  The revenue
from the customer shall exceed the marginal cost of serving that  customer.  For
contracts whose terms extend beyond the date when APS will need to add capacity,
marginal cost shall mean long run marginal cost.

SERVICE CONTRACT
- ----------------

The contract terms and conditions will be at the Company's option,  based on its
assessment of the qualified customer's competitive alternative. The contract may
be for varying  lengths of time as determined by individual  customer or Company
requirements.  Each executed  contract will be filed with Commission Staff, on a
confidential  basis,  at least  thirty days prior to the  effective  date of the
proposed  contract and Staff shall determine  whether the contract complies with
the tariff prior to the effective date. APS must provide adequate  documentation
on each element of the tariff (for example, the customer's  alternatives) before
the thirty day review period commences.  If no action is taken within 30 days of
the filing,  the contract is deemed approved by the Commission.  Nothing in this
tariff is intended to limit the Arizona Corporation  Commission's power to order
recovery of costs  determined to be attributable to the customer either prior to
or after termination of the contract.




                                  ATTACHMENT 5

                        PROPOSED CHANGES TO SCHEDULE #1


2.       ESTABLISHMENT OF SERVICE
2.2               Add to first sentence, "or to  make a special  read without  a
                                          --------------------------------------
                  disconnect and calculate a bill for a partial month."
                  ---------------------------------------------------
                  

2.2               Modify last sentence to read  "Billing for  the service charge
                  will  be  rendered  as  part  of  not  later than  the  second
                  service bill."

2.3      GROUNDS FOR REFUSAL OF SERVICE
2.3.8             Change wording to "Service is requested by  an Applicant and a
                                     -------------------------------------------
                  prior  customer  living  with the  Applicant owes a delinquent
                  --------------------------------------------------------------
                  bill."
                  ----

2.3.9             Change wording to "Applicant is  acting as agent  for a  prior
                                     -------------------------------------------
                  Customer who is deriving benefits of the electric  service and
                  --------------------------------------------------------------
                  who owes a delinquent bill."
                  --------------------------

2.4      ESTABLISHMENT OF CREDIT OR SECURITY DEPOSIT
2.4.1.3           Delete Letter of Guarantee

2.6      SECURITY DEPOSITS
2.6.3             Add "effective on the first business day of each year."
                       ------------------------------------------------

2.6.5.1           Change bankruptcy from within the last 6 months to within  the
                  last 12 months.
                              
2.6.6             Change to "...Customer's maximum monthly billing as  estimated
                                ------------------------------------------------
                  by the Company."
                  --------------

4.2      BILLING AND COLLECTION
4.2.1             Change late charge from 12% to "18%."
                                                  ---

4.4      RETURNED CHECKS
4.4.1             Change $10 to "$15."
                                 ---
4.5               Change collection charge to "field charge", change amount from
                                               ------------
                  $9.50  to  "$15.00"  and  add "or terminate the service."  For
                              ------            ------------------------
                  other than  termination,  premise  visit must be  requested by
                  customer.

4.5.2             Change acceptable to "satisfactory to Company."
                                        -----------------------

5.3      COMPANY ACCESS TO CUSTOMER PREMISES
5.3               Add requirement of "unassisted" access in two sentences.  All 
                                      ---------- 
                  existing conditions shall be grandfathered, i.e., tariff shall
                  apply only to services established  after  effective  date  of
                  tariff.

5.3               Expand remedy for inaccessibility.

5.5               Add "a minimum standard is IEEE 519" and simplify language.
                       ------------------------------                        

6.       METERING AND METERING EQUIPMENT
6.1.1             Add  "Electric  Service  Requirements  manual." All updates to
                  this manual shall be provided to Staff in a timely manner.

7.       TERMINATION
7.1.5             Add  "satisfactory  and unassisted."  All existing  conditions
                        ----------------------------
                  shall be  grandfathered,  i.e.,  tariff  shall  apply  only to
                  services established after effective date of tariff.






                                  ATTACHMENT 6

                                                                            

                                                                
                                                                 
                                 ELECTRIC RATES
                                 --------------
                              
ARIZONA PUBLIC SERVICE COMPANY                       A.C.C. No. 5215
Phoenix, Arizona                                     Tariff or Schedule No. E-52
Filed by:  Gary J. Volkenant                         Original Filing
Title:  Director, Business Financial Services        Effective Date:
Original Effective Date:


               ELECTRIC SERVICE FOR PARTIAL REQUIREMENTS SERVICE
               -------------------------------------------------
                             OF LESS THAN 3,000 KW
                             ---------------------

I.   AVAILABILITY
     ------------

       In all  territory  served by Company at all points  where  facilities  of
adequate  capacity and the required  phase and suitable  voltage are adjacent to
the premises  served and when all applicable  provisions  described  herein have
been met.

II.  APPLICATION
     -----------

       Applicable to any non-residential customer requiring Partial Requirements
services,  Supplemental  Power,  Standby  Power  or  Maintenance  Power  with an
aggregate Partial  Requirements service load of less than 3,000 kW. Customer may
elect  to take  any of the  Partial  Requirements  services  offered  hereunder,
Supplemental  Power,  Standby Power and Maintenance  Power  independently of one
another or in combination with one another as required.


III. TYPE OF SERVICE
     ---------------

       Single  or three  phase,  60 Hertz,  at one  standard  voltage  as may be
selected by Customer subject to availability at Customer's premise.

IV.  MONTHLY BILL
     ------------

       The monthly bill shall be the sum of the amounts  computed  under A., B.,
C., and D. below, including the applicable Adjustments:

       A.    Basic Service
             -------------

             $ 106.79 per month Basic Service Charge, plus
             $ 17.06 per month for each Generator Meter

       B.    Supplemental Service
             --------------------

             In  accordance  with the rate levels  contained in General  Service
             Rate Schedule E-32 excluding the monthly Basic Service Charge.

       C.    Standby Service
             ---------------

             The  monthly  charge for  Standby  Service  shall be the sum of the
             amounts computed in accordance with sections 1 and 2 below:

             1.      Monthly Reservation Charge of either a, b or c:

                     a. $5.54 per kW of Contract  Standby  Capacity  for Standby
                     Service   customers   with   alternate   supply   resources
                     demonstrating  an  aggregate  Capacity  Factor  of  90%  or
                     greater during the billing month.

                     b $7.29 per kW of  contract  Standby  Capacity  for Standby
                     Service   customers   with   alternate   supply   resources
                     demonstrating  an aggregate  Capacity  Factor between 80% -
                     89.9% during the billing month.

                     c.  Standby  Service   customers  whose  alternate   supply
                     resource(s)  achieved an aggregate  capacity factor of less
                     than 80% during a billing  month shall be assessed the same
                     charge as set forth in Section VIII of this rate schedule.

             2.      Standby Energy Charge:

                     June - October $0.0213 per kWh on-peak
                     Billing Cycles $0.0154 per kWh off-peak (Summer)
                     November - May $0.0187 per kWh on-peak
                     Billing Cycles $0.0135 per kWh off-peak (Winter)

             The  charges  for  Standby  Service  contained  in Section C herein
             reflect the Company's  costs to serve Standby  Service  loads.  For
             applications  where the charges for Standby  Service  stated herein
             are  not  competitive  with  customer  installed  standby  resource
             alternatives,   the  Company  may   negotiate   alternate   Monthly
             Reservation  Charges from those  contained  in this rate  schedule;
             however,  the maximum  discount  allowed  shall not be greater than
             fifty  percent  (50%) of the  Reservation  Charges  stated  herein;
             however,  such discount  shall not result in a  reservation  charge
             lower than the Company's  long run capacity costs  associated  with
             this  service.  No  changes  to  the  Standby  Energy  Charge  rate
             component shall be allowed.

             To be eligible for negotiated Monthly Reservation Charges different
             than those contained  herein,  the customer must demonstrate to the
             Company's satisfaction and provide conclusive  documentation (e.g.,
             engineering  studies,  analysis,  etc.) that the customer's on-site
             self-generation  resource(s)  would be a lower cost option over the
             life of the equipment  than had the customer  subscribed to Standby
             Service   from   the   Company.   Notwithstanding   the   potential
             competitiveness   of  the  customer's   self   generation   standby
             facilities,  the Company in its sole opinion, shall have the option
             of  not  offering  any  discounts  to  the   otherwise   applicable
             Reservation Charge.

       D.    Maintenance Service
             -------------------

                     $0.0187 per kWh on-peak
                     $0.0135 per kWh off-peak

       E.    Energy Rates
             ------------

             The  energy  rates  in  Sections  C and D above  are  based  on the
             Company's  estimated marginal costs and will be updated annually to
             reflect changes in the Company's fuel costs.

V.   DETERMINATION OF SUPPLEMENTAL SERVICE
     -------------------------------------

       Supplemental  service shall be defined as demand and energy contracted by
Customer  to augment the power and energy  generated  by  Customer's  generation
facility.

       Supplemental  demand shall be the highest  15-minute  interval during the
billing  month  which  shall  equal  the  (a)  15-minute  integrated  kW  demand
calculated for every  15-minute  interval as recorded on the Supply Meter,  plus
(b) the simultaneous 15 minute integrated kW demand as recorded on the Generator
Meter(s), less (c) the aggregate Contract Standby Capacity of all the customer's
generating  units;  however,  the result  shall  never be less than zero (0) for
purposes of determining  Supplemental  Demand. If Company  authorized  scheduled
maintenance was being performed on any of the customer's  generators at the time
of the highest 15 minute interval during the billing month, the amount of demand
recorded  on the Supply  Meter  shall be reduced by the  applicable  Maintenance
Power  Level (as  determined  in Section VII  hereof) of the  generator  unit(s)
undergoing   authorized  scheduled   maintenance  for  purposes  of  calculating
supplemental demand used for billing.

       Customer's maximum  Supplemental Service kW requirements shall not exceed
that established in the Electric Supply Agreement.

       Supplemental  energy shall be equal to all energy supplied to Customer as
determined from readings of the Supply Meter,  less any energy  determined to be
either Standby or Maintenance energy as defined in this Schedule.

VI.  DETERMINATION OF STANDBY ENERGY
     -------------------------------

       Standby Energy shall be defined to be electric energy supplied by Company
to replace power ordinarily  generated by Customer's  generation facility during
unscheduled full and partial outages of said facility.

       When the sum of the energy  measured on both the Supply and  Generator(s)
Meters during simultaneous  periods is greater than the maximum energy output of
the generator(s) at Contract Standby Capacity, the Standby Energy shall be equal
to the  summation of the  differences  between the maximum  energy output of the
generator(s)  at  Contract  Standby  Capacity  and the  energy  measured  on the
Generator  Meter(s)  for every  15-minute  interval  of the month,  except  when
maintenance  power is being utilized or those intervals where energy measured on
the Supply Meter is zero. When the sum of the energy measured on both the Supply
and Generator(s) Meter is equal to or less than the maximum energy output of the
generator(s) at Contract Standby Capacity, then the Standby energy shall be that
energy measured on the Supply Meter.

VII. DETERMINATION OF MAINTENANCE ENERGY
     -----------------------------------

       Maintenance  energy  shall be defined as energy  supplied  to Customer to
replace  energy  normally  supplied  by the  Customer's  generator(s)  during an
authorized Scheduled Maintenance period.

       Maintenance periods shall not exceed 30 days per cogeneration unit during
any  consecutive  12-month  period and must be scheduled  during the  non-Summer
billing  months.  Customer  shall provide  Company with its planned  maintenance
schedule  12 months  in  advance  of any  planned  maintenance  in order for the
Company to coordinate customer's scheduled maintenance with that of the Company.
Upon  review,  Company  shall  either  approve  customer's  planned  maintenance
schedule or notify customer of alternate acceptable periods.  Customer, in turn,
shall notify the Company of an acceptable alternate maintenance  period(s),  and
shall also  confirm  with the  Company  its  intention  to perform  its  planned
maintenance  45 days  prior  to the  actual  commencement  date  of the  planned
maintenance period.

       Any energy used in excess of a 30-day period or unauthorized  maintenance
energy shall be billed on either the Standby or  Supplemental  Rate as specified
in this Schedule.

       Maintenance  energy,  during a Company  authorized  period  of  scheduled
maintenance to a customer's generation unit(s), shall be determined as follows:

       Maintenance  Power Level =  (Contract  Standby  Capacity)  X  (Generating
       Unit(s) Capacity Factor for the most recent 12 months)

       The maintenance  power level as determined by the above formula shall not
       exceed any actual 15 minute  interval of integrated kw demand as recorded
       on the supply meter.

       If  customer  has less than 12  months  of  billing  history  on  Standby
       Service,  use the capacity factor demonstrated to date; however, not less
       than one full month.

       Maintenance  Energy =  (Maintenance  Power Level) X (hours of maintenance
       authorized by Company during billing month)

VIII. CAPACITY FACTOR STANDARDS
      -------------------------

       Customer's  generating unit(s) must maintain a Capacity Factor of no less
than 75% over a continuous rolling 18 month period to remain eligible to receive
Standby Service under this rate schedule. The calculation of the Capacity Factor
is designed so that the customer  shall not be subject to this  Capacity  Factor
Standard   provision  for  any  purpose  other  than   substandard   operational
performance of the customer's generating unit(s) recognizing that the customer's
load  profile  may not require the full  output  capability  of such  generation
unit(s).  If the  Capacity  Factor  falls  below 75%,  in lieu of the  otherwise
applicable  Reservation  Charge  for  Standby  Service,  the  customer  shall be
assessed a monthly Reservation Charge the greater of:

       1.    $20.78 per kW/month X 2/3 X Contract Standby Capacity; or

       2.    $20.78  per  kW/month X Maximum  Standby  Capacity  (If  customer's
             system  is  directly   interconnected   with  the  Company's   bulk
             transmission  system,  the applicable  Reservation  Charge shall be
             $15.90 per kW per month.)

       Maximum Standby  Capacity is intended to represent the maximum  15-minute
interval of Standby  Power  provided  the  customer  by the  Company  during the
billing  month.  Maximum  Standby  Capacity  shall equal the  highest  15-minute
interval during the billing month of the following calculation:

                     MSC = (SIGMA)CSC - Maint.

     Where:

       MSC =         Maximum  15-minute  interval  during the  billing  month of
                     Standby Power (kW) being supplied by Company.

       (SIGMA)CSC=   The  aggregate   Contract   Standby  Capacity  of  all  the
                     customer's self-generation units.

       Maint=        The  simultaneous  15-minute  interval  of any  Maintenance
                     Power (kW) being supplied to customer by the Company.

IX.  METERING
     --------

       The  Company  will  install a Supply  Meter at its point of  delivery  to
Customer  and a  Generator  Meter(s)  at the  point(s)  of  output  from each of
Customer's  generators.  All meters will record  integrated demand and energy on
the same 15-minute interval basis as specified by Company.

X.   DEFINITIONS
     -----------

1.   Contract Standby Capacity - for each specific customer  generating unit for
     -------------------------
     which the Company is providing  Standby Service,  Contract Standby Capacity
     shall be the  greater  of:  a) the  measured  kW  output  of each  customer
     self-generation  unit at time of start-up test, or b) the highest 15 minute
     measured  kW  output  of  each  generating  unit,  however,  not to  exceed
     Customer's actual total load.

2.   Generator  Meter - the  time-of-use  meter  used to  measure  in  15-minute
     ----------------
     intervals the total power and energy output of each Customer's cogeneration
     units.
                                                                         

3.   Capacity Factor - for purposes of this rate schedule, capacity factor shall
     ---------------
     mean the capacity factor of the customer's generating unit(s) and shall not
     reflect any period of time during a billing  month that Company  authorized
     Maintenance  Power  was  being  utilized.  The  Capacity  factor  shall  be
     calculated in accordance with the following formula:

      Capacity Factor = Actual customer generated kWh's during the billing month
                        --------------------------------------------------------
                                                  A

         For  purposes of use in this rate  schedule,  the value of the capacity
         factor calculation shall never exceed 100%.

    Where:        

             A =   The lesser of:   a) [(Contract Standby Capacity) X (MH)];  or
                                    b) CTL

             MH =  Hours in the billing month  exclusive of any hours during the
                   billing month that  customer's  unit(s) were  non-operational
                   during Company authorized scheduled maintenance.

             CTL = Customer's  maximum  total load during the  billing  month as
                   determined  by the total of energy  generated  on  customer's
                   generating  unit as recorded on the Generator  Meter plus all
                   energy   provided  by  Company   during  the  billing   month
                   (exclusive of  maintenance  energy) as recorded on the Supply
                   Meter

4.   Supply Meter - the time-of-use meter used to measure in 15-minute intervals
     ------------
     the total power and energy supplied by Company to Customer.

5.   Time  Periods - On-Peak Period:    9 a.m. - 9 p.m.  Monday  through  Friday
     -------------
                     Off-Peak Period:   All Other Hours

       Mountain  Standard  Time  shall be used in the  application  of this rate
       schedule. In addition, to prevent radical changes in the system loads the
       beginning and ending hours for  individual  customers may be varied by up
       to one hour  (total  hours in each time period to remain  unchanged)  and
       because of potential  differences of the timing  devices,  there may be a
       variation of up to 15 minutes in timing for the pricing periods.

XI   ADJUSTMENTS
     -----------

       The  applicable   proportionate   part  of  any  taxes  or   governmental
impositions  which are or may in the  future be  assessed  on the basis of gross
revenues of the Company and/or the price or revenue from the electric  energy or
service sold and/or the volume of energy  generated or purchased for sale and/or
sold hereunder.

XII. TERMINATION PROVISION
     ---------------------

       Should  Customer  cease  to  operate  his  cogeneration  unit(s)  for  60
consecutive  days  during  periods  other  than  planned  scheduled  maintenance
periods,  Company  reserves the option to terminate  the  Agreement  for service
under this rate schedule with Customer.

XIII. CONTRACT PERIOD
     ----------------

       As  provided  in  the  Electric  Supply  Agreement  between  Company  and
Customer.

XIV. TERMS AND CONDITIONS
     --------------------

       Customer  must enter into an Agreement  for the  Interconnection  and The
Sale of  Power  with  Company  and an  Electric  Supply  Agreement  which  shall
establish all pertinent  details related to  interconnection  and other required
service standards. Customer will not have the option to sell power and energy to
Company under this tariff.  Should  Customer  desire to do so, Customer would be
required  to enter  into a new  Service  Agreement  which  would  set  forth the
applicable  purchase rate in addition terms and  conditions for  interconnection
and for the sale of power to the Company.

       Customer will be required to contract for adequate standby power to cover
the total output of all the customer's  generators  unless  adequate  facilities
have been installed,  to the satisfaction of APS, that isolates  portions of the
customer's  load  from  APS'  system  so that APS will in no event be  providing
standby service in excess of Contracted Standby Capacity.


                                  
                                                                 

                                                                          
                                 ELECTRIC RATES
                                 --------------

ARIZONA PUBLIC SERVICE COMPANY                       A.C.C. No. 5214
Phoenix, Arizona                                     Tariff or Schedule No. E-55
Filed by:  Gary J. Volkenant                         Original Filing
Title:  Director, Business Financial Services        Effective Date:
Original Effective Date:


               ELECTRIC SERVICE FOR PARTIAL REQUIREMENTS SERVICE
               -------------------------------------------------
                              3,000 KW OR GREATER
                              -------------------

I.   AVAILABILITY
     ------------

       In all  territory  served by Company at all points  where  facilities  of
adequate  capacity and the required  phase and suitable  voltage are adjacent to
the premises  served and when all applicable  provisions  described  herein have
been met.

II.  APPLICATION
     -----------

       Applicable  to any  customer  requiring  Partial  Requirements  services,
Supplemental Power, Standby Power or Maintenance Power with an aggregate Partial
Requirements  service load of no less than 3,000 kW.  Customer may elect to take
any of the Partial Requirements services offered hereunder  (Supplemental Power,
Standby  Power  and  Maintenance  Power)  independently  of  one  another  or in
combination with one another as required.

III. TYPE OF SERVICE
     ---------------

       Single  or three  phase,  60 Hertz,  at one  standard  voltage  as may be
selected by Customer subject to availability at Customer's premise.

IV.  MONTHLY BILL
     ------------

       The monthly bill shall be the sum of the amounts  computed  under A., B.,
       C., and D. below, including the applicable Adjustments:

       A.    Basic Service
             -------------

             1.   a) For  applications no greater than 15,000 kW: 
                     $ 1,671.39 per month Basic Service Charge; plus

                  b) For applications greater than 15,000 kW:
                     The monthly Basic Service Charge shall be $1,671.39 plus an
                     applicable  adder for  recovery  of  non-standard  metering
                     costs and related O&M expenses; plus

             2.   $ 62.51 per month for each Generator Meter

       B.    Supplemental Service
             --------------------

             In  accordance  with the rate levels  contained in General  Service
             Rate Schedule E-32,  excluding the monthly Basic Service Charge (or
             E-34 if Supplemental Power requirements are 3,000 kW or more).

       C.    Standby Service
             ---------------

             The  monthly  charge for  Standby  Service  shall be the sum of the
             amounts computed in accordance with sections 1 and 2 below:

             1. Monthly Reservation Charge of either a, b or c:

                     a. $ 4.13 per kW of Contract  Standby  Capacity for Standby
                     Service   customers   with   alternate   supply   resources
                     demonstrating  an  aggregate  Capacity  Factor  of  95%  or
                     greater during the billing month.

                     b. $ 5.05 per kW of contract  Standby  Capacity for Standby
                     Service   customers   with   alternate   supply   resources
                     demonstrating  an aggregate  Capacity  Factor between 90% -
                     94.9% during the billing month.

                     c. $ 6.98 per kW of contract  Standby  Capacity for Standby
                     Service   customers   with   alternate   supply   resources
                     demonstrating  an aggregate  Capacity  Factor between 80% -
                     89.9% during the billing month.

                     d.  Standby  Service   customers  whose  alternate   supply
                     resource(s)  achieved an aggregate  capacity factor of less
                     than 80% during a billing  month shall be assessed the same
                     charge as set forth in Section VIII of this rate schedule.

             2. Standby Energy Charge:

                     June - October       $0.0217 per kWh on-peak
                     Billing Cycles       $0.0159 per kWh off-peak (Summer)
                     November - May       $0.0193 per kWh on-peak
                     Billing Cycles       $0.0139 per kWh off-peak (Winter)

             The  charges  for  Standby  Service  contained  in Section C herein
             reflect the Company's  costs to serve Standby  Service  loads.  For
             applications  where the charges for Standby  Service  stated herein
             are  not  competitive  with  customer  installed  standby  resource
             alternatives,   the  Company  may   negotiate   alternate   Monthly
             Reservation  Charges from those  contained  in this rate  schedule;
             however,  the maximum  discount  allowed  shall not be greater than
             fifty  percent  (50%) of the  Reservation  Charges  stated  herein;
             however,  such discount  shall not result in a  reservation  charge
             lower than the Company's  long run capacity costs  associated  with
             this  service.  No  changes  to  the  Standby  Energy  Charge  rate
             component shall be allowed.

             To be eligible for negotiated Monthly Reservation Charges different
             than those contained  herein,  the customer must demonstrate to the
             Company's satisfaction and provide conclusive  documentation (e.g.,
             engineering  studies,  analysis,  etc.) that the customer's on-site
             self-generation  resource(s)  would be a lower cost option over the
             life of the equipment  than had the customer  subscribed to Standby
             Service   from   the   Company.   Notwithstanding   the   potential
             competitiveness   of  the  customer's   self   generation   standby
             facilities,  the Company in its sole opinion, shall have the option
             of  not  offering  any  discounts  to  the   otherwise   applicable
             Reservation Charge.

       D.    Maintenance Service
             -------------------

                     $0.0193 per kWh on-peak

                     $0.0139 per kWh off-peak

       E.    Energy Rates
             ------------

             The  energy  rates  in  Sections  C and D above  are  based  on the
             Company's  estimated marginal costs and will be updated annually to
             reflect changes in the Company's fuel costs.

V.   DETERMINATION OF SUPPLEMENTAL SERVICE
     -------------------------------------

       Supplemental  service shall be defined as demand and energy contracted by
Customer  to augment the power and energy  generated  by  Customer's  generation
facility.

       Supplemental  demand shall be the highest  15-minute  interval during the
billing  month  which  shall  equal  the  (a)  15-minute  integrated  kW  demand
calculated for every  15-minute  interval as recorded on the Supply Meter,  plus
(b) the simultaneous 15 minute integrated kW demand as recorded on the Generator
Meter(s), less (c) the aggregate Contract Standby Capacity of all the customer's
generating  units;  however,  the result  shall  never be less than zero (0) for
purposes of determining  Supplemental  Demand. If Company  authorized  scheduled
maintenance was being performed on any of the customer's  generators at the time
of the highest 15 minute interval during the billing month, the amount of demand
recorded  on the Supply  Meter  shall be reduced by the  applicable  Maintenance
Power  Level (as  determined  in Section VII  hereof) of the  generator  unit(s)
undergoing   authorized  scheduled   maintenance  for  purposes  of  calculating
supplemental demand used for billing.

       Customer's maximum  Supplemental Service kW requirements shall not exceed
that established in the Electric Supply Agreement.

       Supplemental  energy shall be equal to all energy supplied to Customer as
determined from readings of the Supply Meter,  less any energy  determined to be
either Standby or Maintenance energy as defined in this Schedule.

VI.  DETERMINATION OF STANDBY ENERGY
     -------------------------------

       Standby Energy shall be defined to be electric energy supplied by Company
to replace power ordinarily  generated by Customer's  generation facility during
unscheduled full and partial outages of said facility.

       When the sum of the energy  measured on both the Supply and  Generator(s)
Meters during simultaneous  periods is greater than the maximum energy output of
the generator(s) at Contract Standby Capacity, the Standby Energy shall be equal
to the  summation of the  differences  between the maximum  energy output of the
generator(s)  at  Contract  Standby  Capacity  and the  energy  measured  on the
Generator  Meter(s)  for every  15-minute  interval  of the month,  except  when
maintenance  power is being utilized or those intervals where energy measured on
the Supply Meter is zero. When the sum of the energy measured on both the Supply
and Generator(s) Meter is equal to or less than the maximum energy output of the
generator(s) at Contract Standby Capacity, then the Standby energy shall be that
energy measured on the Supply Meter.

VII. DETERMINATION OF MAINTENANCE ENERGY
     -----------------------------------

       Maintenance  energy  shall be defined as energy  supplied  to Customer to
replace  energy  normally  supplied  by the  Customer's  generator(s)  during an
authorized Scheduled Maintenance period.

       Maintenance periods shall not exceed 30 days per cogeneration unit during
any  consecutive  12-month  period and must be scheduled  during the  non-Summer
billing  months.  Customer  shall provide  Company with its planned  maintenance
schedule  12 months  in  advance  of any  planned  maintenance  in order for the
Company to coordinate customer's scheduled maintenance with that of the Company.
Upon  review,  Company  shall  either  approve  customer's  planned  maintenance
schedule or notify customer of alternate acceptable periods.  Customer, in turn,
shall notify the Company of an acceptable alternate maintenance  period(s),  and
shall also  confirm  with the  Company  its  intention  to perform  its  planned
maintenance  45 days  prior  to the  actual  commencement  date  of the  planned
maintenance period.

       Any energy used in excess of a 30-day period or unauthorized  maintenance
energy shall be billed on either the Standby or  Supplemental  Rate as specified
in this Schedule.

       Maintenance  energy,  during a Company  authorized  period  of  scheduled
maintenance to a customer's generation unit(s), shall be determined as follows:

       Maintenance  Power Level =  (Contract  Standby  Capacity)  X  (Generating
       Unit(s) Capacity Factor for the most recent 12 months)

       The maintenance  power level as determined by the above formula shall not
       exceed any actual 15 minute  interval of integrated kw demand as recorded
       on the supply meter.

       If  customer  has less than 12  months  of  billing  history  on  Standby
       Service,  use the capacity factor demonstrated to date; however, not less
       than one full month.
       Maintenance  Energy =  (Maintenance  Power Level) X (hours of maintenance
       authorized by Company during billing month)

VIII. CAPACITY FACTOR STANDARDS
      -------------------------

       Customer's  generating unit(s) must maintain a Capacity Factor of no less
than 75% over a continuous rolling 18 month period to remain eligible to receive
Standby Service under this rate schedule. The calculation of the Capacity Factor
is designed so that the customer  shall not be subject to this  Capacity  Factor
Standard   provision  for  any  purpose  other  than   substandard   operational
performance of the customer's generating unit(s) recognizing that the customer's
load  profile  may not require the full  output  capability  of such  generation
unit(s).  If the  Capacity  Factor  falls  below 75%,  in lieu of the  otherwise
applicable  Reservation  Charge  for  Standby  Service,  the  customer  shall be
assessed a monthly Reservation Charge the greater of:

       1.    $22.90 per kW/month X 2/3 X Contract Standby Capacity; or

       2.    $22.90  per  kW/month X Maximum  Standby  Capacity  
             (If customer's system is directly interconnected with the Company's
             bulk transmission  system, the applicable  Reservation Charge shall
             be 19.43 per kW per month.)

       Maximum  Standby  Capacity is the maximum  15-minute  interval of Standby
Power  provided the customer by the Company  during the billing  month.  Maximum
Standby Capacity shall equal the highest  15-minute  interval during the billing
month of the following calculation:

             MSC =   (SIGMA)CSC - Maint.

       Where:

       MSC=          Maximum  15-minute  interval  during the  billing  month of
                     Standby Power (kW) being supplied by Company.

       (SIGMA)CSC=   The  aggregate   Contract   Standby  Capacity  of  all  the
                     customer's self-generation units.

       Maint=        The  simultaneous  15-minute  interval  of any  Maintenance
                     Power (kW) being supplied to customer by the Company.

IX.  METERING
     --------

       The  Company  will  install a Supply  Meter at its point of  delivery  to
Customer  and a  Generator  Meter(s)  at the  point(s)  of  output  from each of
Customer's  generators.  All meters will record  integrated demand and energy on
the same 15-minute interval basis as specified by Company.

X.   DEFINITIONS
     -----------

1.   Contract Standby Capacity - for each specific customer  generating unit for
     -------------------------
     which the Company is providing  Standby Service,  Contract Standby Capacity
     shall  be the  greater  of a) the  measured  kW  output  of  each  customer
     self-generation  unit at time of start-up test, or b) the highest 15 minute
     measured  kW  output  of  each  generating  unit,  however,  not to  exceed
     Customer's actual total load.

2.   Generator  Meter - the  time-of-use  meter  used to  measure  in  15-minute
     ----------------
     intervals the total power and energy output of each Customer's cogeneration
     units.

3.   Capacity Factor - for purposes of this rate schedule, capacity factor shall
     ---------------
     mean the capacity factor of the customer's generating unit(s) and shall not
     reflect any period of time during a billing  month that Company  authorized
     Maintenance  Power  was  being  utilized.  The  Capacity  factor  shall  be
     calculated in accordance with the following formula:

      Capacity Factor = Actual customer generated kWh's during the billing month
                        --------------------------------------------------------
                                                A

             For  purposes  of use in  this  rate  schedule,  the  value  of the
             capacity factor calculation shall never exceed 100%.

       Where:

             A =   The lesser of:   a) [(Contract Standby Capacity) X (MH)];  or
                                 b) CTL

             MH =  Hours in the billing month  exclusive of any hours during the
                   billing month that  customer's  unit(s) were  non-operational
                   during Company authorized scheduled maintenance.

             CTL = Customer's  maximum  total load during the  billing  month as
                   determined  by the total of energy  generated  on  customer's
                   generating  unit as recorded on the Generator  Meter plus all
                   energy   provided  by  Company   during  the  billing   month
                   (exclusive of  maintenance  energy) as recorded on the Supply
                   Meter

4.   Supply Meter - the time-of-use meter used to measure in 15-minute intervals
     ------------
     the total power and energy supplied by Company to Customer.
                                                              

5.   Time  Periods -  On-Peak  Period:    9 a.m.- 9 p.m. Monday  through  Friday
     -------------
                      Off-Peak Period:    All Other Hours

       Mountain  Standard  Time  shall be used in the  application  of this rate
       schedule. In addition, to prevent radical changes in the system loads the
       beginning and ending hours for  individual  customers may be varied by up
       to one hour  (total  hours in each time period to remain  unchanged)  and
       because of potential  differences of the timing  devices,  there may be a
       variation of up to 15 minutes in timing for the pricing periods.

XI   ADJUSTMENTS
     -----------

       The  applicable   proportionate   part  of  any  taxes  or   governmental
impositions  which are or may in the  future be  assessed  on the basis of gross
revenues of the Company and/or the price or revenue from the electric  energy or
service sold and/or the volume of energy  generated or purchased for sale and/or
sold hereunder.

XII. TERMINATION PROVISION
     ---------------------

       Should  Customer  cease  to  operate  his  cogeneration  unit(s)  for  60
consecutive  days  during  periods  other  than  planned  scheduled  maintenance
periods,  Company  reserves the option to terminate  the  Agreement  for service
under this rate schedule with Customer.

XIII. CONTRACT PERIOD
     ----------------

       As  provided  in  the  Electric  Supply  Agreement  between  Company  and
Customer.

XIV. TERMS AND CONDITIONS
     --------------------

       Customer  must enter into an Agreement  for the  Interconnection  and The
Sale of  Power  with  Company  and an  Electric  Supply  Agreement  which  shall
establish all pertinent  details related to  interconnection  and other required
service standards. Customer will not have the option to sell power and energy to
Company under this tariff.  Should  Customer  desire to do so, Customer would be
required  to enter  into a new  Service  Agreement  which  would  set  forth the
applicable  purchase rate in addition terms and  conditions for  interconnection
and for the sale of power to the Company.

       Customer will be required to contract for adequate standby power to cover
the total output of all the customer's  generators  unless  adequate  facilities
have been installed,  to the satisfaction of APS, that isolates  portions of the
customer's  load  from  APS'  system  so that APS will in no event be  providing
standby service in excess of Contracted Standby Capacity.





                                  ATTACHMENT 7



                                                                            

                                 ELECTRIC RATES
                                 --------------

ARIZONA PUBLIC SERVICE COMPANY                      A.C.C. No. 5216
Phoenix, Arizona                                    Cancelling A.C.C. No. 5137
Filed by:  Gary J. Volkenant                        Tariff or Schedule No. EPR-2
Title:  Director, Business Financial Services       Revision No. 4
Original Effective Date:  October 25, 1981          Effective:


      PURCHASE RATES FOR QUALIFIED COGENERATION AND SMALL POWER PRODUCTION
      --------------------------------------------------------------------
FACILITIES UNDER 100 KW RECEIVING PARTIAL REQUIREMENTS OR INTERRUPTIBLE SERVICE
- -------------------------------------------------------------------------------

AVAILABILITY
- ------------

      In all territory served by Company.


APPLICATION
- -----------

      To all cogeneration  and small power production  facilities 100 kW or less
where the facility's  generator(s)  and load are located at the same premise and
that  otherwise  meet  qualifying  status  pursuant to the  Arizona  Corporation
Commission's  Decision  No.  52345 on  cogeneration  and small power  production
facilities.   Applicable  only  to  qualifying  facilities  (QF's)  electing  to
configure their systems as to require only partial requirements or interruptible
service from the Company in order to meet their electric requirements.


TYPE OF SERVICE
- ---------------

      Electric sales to the Company must be single or three phase,  60 Hertz, at
one standard voltage as may be selected by customer  (subject to availability at
the premises).  The  qualifying  facility will have the option to sell energy to
the  Company  at a voltage  level  different  than that for  purchases  from the
Company;  however, the QF will be responsible for all incremental costs incurred
to accommodate such an arrangement.


PAYMENT FOR PURCHASES FROM AND SALES TO THE CUSTOMER
- ----------------------------------------------------

      Power sales and special  services  supplied by the Company to the Customer
in order to meet its supplemental or interruptible electric requirements will be
priced at the applicable retail rate or rates.

      The Company will pay the Customer for any energy  purchased as  calculated
on the standard purchase rate (see below).


MONTHLY PURCHASE RATE
- ---------------------

      Rate for pricing of energy,  net of that for the  customer's own use, that
is delivered to the Company:


                                                Cents per kWh
                                ------------------------------------------------
                                    Non-Firm Power              Firm Power
                                ----------------------   -----------------------
                                On-Peak(1)  Off-Peak(2)  On-Peak(1)  Off-Peak(2)
                                ----------  ----------   ----------  -----------

Summer Billing Cycles             1.58         1.17        2.20         1.52
(June - October)

Winter Billing Cycles             1.25         1.08        1.74         1.38
(November - May)


(1)  On-Peak Periods:       9 a.m. to 9 p.m., weekdays      

(2)  Off-Peak Periods:      All other hours


These rates are based on the Company's  estimated  avoided energy costs and will
be updated annually to reflect changes in the Company's fuel costs.


SERVICE CHARGE
- --------------

      The monthly service charge shall be determined in accordance with the type
of customer service characteristics as set forth below:

                                                    Monthly Charge
                                                    --------------
          Single Phase Service:
                 0-200 amp service                     $  7.34

          Three Phase Service:
                 0-200 amp service                     $  8.87
                 201-400 amp service                   $ 18.31


CONTRACT PERIOD
- ---------------

      As provided for in the Purchase Agreement.


DEFINITIONS
- -----------

      1.      Partial Requirements Service - A QF's system configuration whereby
              ----------------------------
              the output from its electric  generator(s)  first go to supply its
              own electric  requirements  with any excess energy (over and above
              its own  requirements at the time) then being sold to the Company.
              The  Company   supplies  the  Customer's   supplemental   electric
              requirements   (those   not  met  by  the  QF's   own   generation
              facilities).  This also may be referred to as the "parallel  mode"
              of operation.

      2.      Special  Service(s)  - The electric  service(s)  specified in this
              ------------------
              section  that will be provided by the Company in addition to or in
              lieu of normal service(s).

              *    Interruptible Power - Electric energy or capacity supplied by
                   -------------------
                   the Company  subject to  interruption  by the  Company  under
                   specified   conditions   and  under  agreed  upon  lead  time
                   requirements.

      3.      Non-Firm  Power - Electric  power  which is  supplied by the power
              ---------------
              producer at the  producer's  option,  where no firm  guarantee  is
              provided,  and the power can be  interrupted by the power producer
              at any time.

      4.      Firm Power - Power  available,  upon demand,  at all times (except
              ----------
              for forced  outages and scheduled  maintenance)  during the period
              covered by the Purchase  Agreement from the Customer's  facilities
              with an expected or demonstrated reliability which is greater than
              or equal to the average  reliability  of the Company's  firm power
              sources.

      5.      Time  Periods  -  Mountain  Standard  Time  shall  be  used in the
              -------------
              application   of  this  rate   schedule.   Because  of   potential
              differences of the timing devices,  there may be a variation of up
              to 15 minutes in timing for the pricing periods.


TERMS AND CONDITIONS
- --------------------

         Subject to Company's  Terms and  Conditions  for Energy  Purchases from
Qualified  Cogeneration or Small Power  Production  Facilities,  or as it may be
amended or modified from time to time by any  supplemental  or special Terms and
Conditions pursuant to Customer's Purchase Agreement with the Company.

         Customer and Company will share in the cost of the bi-directional meter
used to record sales to the Customer and purchases  from the  Customer.  Company
shall be  responsible  for all costs up to and equal to the installed  cost of a
residential  time-of-use  meter,  and  Customer  shall  be  responsible  for the
difference between the installed cost of the bi-directional  meter compared to a
standard  residential  time-of-use meter.  Customer shall have the option to pay
the incremental metering costs initially or in monthly installements over a five
year time period.


METERING CONFIGURATION
- ----------------------





                               [GRAPHIC OMITTED]
                        
[The omitted  material is a diagram of a bidirectional  meter which reads energy
flows from the Company into the customer for the  customer's  QF's load and also
reads the QF's generator's excess supply sold back to the Company.]



                                               
                                 ELECTRIC RATES


ARIZONA PUBLIC SERVICE COMPANY                      A.C.C. No. 5217
Phoenix, Arizona                                    Cancelling A.C.C. No. 5159
Filed by:  Gary J. Volkenant                        Tariff or Schedule No. EPR-3
Title:  Director, Business Financial Services       Revision No. 1
Original Effective Date:  February 4, 1993          Effective:


     PURCHASE RATES FOR QUALIFIED SOLAR/PHOTOVOLTAIC SMALL POWER PRODUCTION
     ----------------------------------------------------------------------
                 FACILITIES 10 KW OR LESS THAT RECEIVE FULL OR
                 ---------------------------------------------
                     PARTIAL REQUIREMENTS ELECTRIC SERVICE
                     -------------------------------------
                                     FROZEN

AVAILABILITY
- ------------

In all territory served by Company.

APPLICATION
- -----------

To all small power  production  facilities  with a nameplate  rating of 10 kW or
less utilizing  solar/photovoltaic  technology where the customer's generator(s)
and load are located at the same premise and meet qualifying  status pursuant to
the Arizona  Corporation  Commission's  Decision No. 52345 on  cogeneration  and
small power  production  facilities.  Applicable  only to qualifying  facilities
(QF's) either:  a) operating in the simultaneous  buy/sell mode (whereby all the
QF's generation  output is fed directly into the Company's system and all of the
QF's  electric  requirements  are met by sales  from the  Company)  or;  b) QF's
electing to configure  their systems as to require only partial  requirements or
interruptible  service  from  the  company  in  order  to  meet  their  electric
requirements.

Applicable  only to those  customers being served on the Company's Rate Schedule
EPR-3 prior to ____________________.

TYPE OF SERVICE
- ---------------

Electric  sales to the Company must be single phase,  60 Hertz,  at one standard
voltage  as  may  be  selected  by  customer  (subject  to  availability  at the
premises).  The  qualifying  facility will have the option to sell energy to the
Company at a voltage level  different  than that for purchases from the Company;
however,  the Customer will be responsible for all incremental costs incurred by
APS to accommodate such an arrangement.

BILLING OPTIONS FOR PURCHASES FROM AND SALES TO THE CUSTOMER
- ------------------------------------------------------------

The  Customer  will have the  option of  choosing  either of the  following  two
methods for determining the bill for purchases and sales:

A.    Net Bill Method:

      The energy (kWh's) sold to the Company shall be subtracted from the energy
      purchased from the Company. If the difference is positive,  the net energy
      received from the Company will be priced at the applicable standard retail
      rate  under  which  the  Customer  would   otherwise   purchase  its  full
      requirements  service.  If the  difference  is  negative,  the net  energy
      delivered to the Company will be priced at the Monthly Purchase Rate shown
      below.

B.    Separate Bill Method:

      All sales and purchases shall each be treated separately with sales to the
      Customer   billed  on  the  applicable   standard  retail  rate  for  full
      requirements  service,  and  purchases  of energy from the  Customer's  QF
      priced at the Monthly Purchase Rate shown below.

MONTHLY PURCHASE RATE
- ---------------------

Rate for  pricing of energy,  net of that for the  customer's  own use,  that is
delivered to the Company under either Billing Option A or Option B:

                                                 Cents per kWh
                               -------------------------------------------------
                                   Non-Firm Power              Firm Power
                               -------------------------------------------------
                               On-Peak(1)  Off-Peak(2)  On-Peak(1)   Off-Peak(2)
                               ----------  -----------  ----------   -----------

    Summer Billing Cycles        1.58         1.17        2.20          1.52
    (June - October)

    Winter Billing Cycles        1.25         1.08        1.74          1.38
    (November - May)
 

(1) On-Peak Periods:       9 a.m. to 9 p.m., weekdays
                                                            
(2) Off-Peak Periods:      All other hours


         These rates are based on the Company's  estimated  avoided energy costs
         and will be updated  annually to reflect  changes in the Company's fuel
         costs.

METERING
- --------

See pages 3 and 4  Metering  Configurations  & Options  outlining  the  metering
options available to  solar/photovoltaic  QF Customers electing the simultaneous
buy/sell mode or the parallel mode of operation.


CONTRACT PERIOD
- ---------------

As provided for in the Purchase Agreement.


DEFINITIONS
- -----------

1.    Full Requirements  Service - Any instance whereby the Company provides all
      --------------------------
      the electric requirements of a Customer.

2.    Partial  Requirements  Service - A QF's system  configuration  whereby the
      ------------------------------
      output from its electric  generator(s) first go to supply its own electric
      requirements  with any excess energy (over and above its own  requirements
      at the time) then being sold to the  Company.  The  Company  supplies  the
      Customer's  supplemental  electric requirements (those not met by the QF's
      own-generation facilities).  This also may be referred to as the "parallel
      mode" of operation.

3.    Special  Service(s)  - The electric  service(s)  specified in this section
      ------------------
      that will be  provided  by the Company in addition to or in lieu of normal
      service(s).

      *    Interruptible  Power - Electric  energy or  capacity  supplied by the
           --------------------
           Company  subject  to  interruption  by the  Company  under  specified
           conditions and under agreed upon lead time requirements.

4.    Non-Firm Power - Electric power which is supplied by the power producer at
      --------------
      the producer's option, where no firm guarantee is provided,  and the power
      can be interrupted by the power producer at any time.

5.    Firm Power - Power available, upon demand, at all times (except for forced
      ----------
      outages  and  scheduled  maintenance)  during  the  period  covered by the
      Purchase  Agreement  from the  Customer's  facilities  with an expected or
      demonstrated  reliability  which is greater  than or equal to the  average
      reliability of the Company's firm power sources.

6.    Net Energy - The total  kilowatthours  (kWh's) sold to the Customer by the
      ----------
      Company less the total kWh's  purchased by the Company from the Customer's
      QF. "Net energy" applies only to those QF's operating in the  simultaneous
      buy/sell mode.

7.    Time Periods - Mountain  Standard Time shall be used in the application of
      ------------
      this  rate  schedule.  Because  of  potential  differences  of the  timing
      devices,  there may be a  variation  of up to 15 minutes in timing for the
      pricing periods.


TERMS AND CONDITIONS
- --------------------

Subject to Company's  Schedule No. 2, "Terms and Conditions for Energy Purchases
from Qualified Cogeneration or Small Power Production Facilities",  or as it may
be amended or modified  from time to time by any  supplemental  or special Terms
and Conditions pursuant to Customer's Purchase Agreement with the Company.


                       METERING CONFIGURATIONS & OPTIONS
              FOR SOLAR/PHOTOVOLTAIC QF APPLICATIONS 10 KW OR LESS
                          (Simultaneous Buy/Sell Mode)



                               [GRAPHIC OMITTED]

[The omitted  material is a diagram of the QF's  generator  which has meter 1 of
what is sold into the Company.  The Company's  line goes through meter 2 selling
to QF's load.]






                                METERING OPTIONS
- --------------------------------------------------------------------------------

                                                       Type of Meter     Type of Meter
                                                        (Meter 1)          (Meter 2)  
                                                        ----------        -----------
                                                                        

Qualifying Facilities Utilizing Solar/Photovoltaic
- -------------------------------------------------- 
Technology 10 kW or less:
- ------------------------

         f on an Energy Only (kWh) Type Rate*              TOU(a)             kWh(b)
         f on a Time-of-Use Type Rate*                     TOU(c)             TOU(d)



* Refers to the Customer's  otherwise  applicable  standard retail rate for firm
purchases from the Company.


(a)      A  Time-of-use  (TOU) meter that  registers  kWh's only during peak and
         off-peak periods as specified in the "Monthly Purchase Rate" section of
         this rate schedule.

(b)      A non-timed watthour meter that registers kWh's only.

(c)      A TOU meter that registers kWh's only during peak and off-peak  periods
         concurrent  with those  periods  used in  measuring  energy for billing
         purposes by Meter 2.

(d)      As per applicable rate schedule.


         NOTE:    APS shall be responsible for providing all required meters for
                  the  Simultaneous  Buy/Sell  Mode  under  the  EPR-3  Metering
                  Configuration.



                       METERING CONFIGURATIONS & OPTIONS
              FOR SOLAR/PHOTOVOLTAIC QF APPLICATIONS 10 KW OR LESS
                          (Parallel Mode of Operation)



                               [GRAPHIC OMITTED]

[The  omitted  material  is a diagram of two meters  which are set  between  the
Company and QF's generator and load.  Meter 1 registers sales by the Company and
meter 2 represents sales to the Company.]






                                METERING OPTIONS
- --------------------------------------------------------------------------------

                                                       Type of Meter      Type of Meter
                                                        (Meter 1)           (Meter 2)  
                                                        ----------         -----------
                                                                        

Qualifying Facilities Utilizing Solar/Photovoltaic
- --------------------------------------------------
Technology 10 kW or less:
- ------------------------

         If on an Energy Only (kWh) Type Rate*             kWh(a)             TOU(b)
         If on a Time-of-Use Type Rate*                    TOU(c)             TOU(d)



         *Refers to the Customer's otherwise applicable standard retail rate for
firm purchases from the Company.


(a)      A non-timed watthour meter that registers kWh's only.


(b)      A  Time-of-use  (TOU) meter that  registers  kWh's only during peak and
         off-peak periods as specified in the "Monthly Purchase Rate" section of
         this rate schedule.


(c)      As per applicable rate schedule.


         NOTE:    APS shall be responsible for providing all required meters for
                  the  parallel  mode of  operation  under  the  EPR-3  Metering
                  Configuration.




                                                                              
                                 ELECTRIC RATES
                                 --------------


ARIZONA PUBLIC SERVICE COMPANY                      A.C.C. No. 5188
Phoenix, Arizona                                    Tariff or Schedule No. EPR-4
Filed by:  Gary J. Volkenant                        Original Filing
Title:  Director, Business Financial Services       Effective:
Original Effective Date:


  PURCHASE RATES FOR QUALIFIED SMALL POWER PRODUCTION FACILITIES 10 KW OR LESS
  ----------------------------------------------------------------------------
                   UTILIZING RENEWABLE RESOURCE TECHNOLOGIES
                   -----------------------------------------
               THAT RECEIVE PARTIAL REQUIREMENTS ELECTRIC SERVICE
               --------------------------------------------------


AVAILABILITY
- ------------

In all territory served by Company.

APPLICATION
- ------------

To all small power  production  facilities  with a nameplate  rating of 10 kW or
less utilizing renewable resource technologies where the customer's generator(s)
and load are located at the same premise and meet qualifying  status pursuant to
the Arizona  Corporation  Commission's  Decision No. 52345 on  cogeneration  and
small power  production  facilities.  Applicable  only to qualifying  facilities
(QF's)   electing  to  configure  their  systems  as  to  require  only  partial
requirements  or  interruptible  service from the Company in order to meet their
electric requirements.

TYPE OF SERVICE
- ---------------

Electric  sales to the Company must be single phase,  60 Hertz,  at one standard
voltage  as  may  be  selected  by  customer  (subject  to  availability  at the
premises).  The  qualifying  facility will have the option to sell energy to the
Company at a voltage level  different  than that for purchases from the Company;
however,  the Customer will be responsible for all incremental costs incurred by
APS to accommodate such an arrangement.

PAYMENT FOR PURCHASES FROM AND SALES TO THE CUSTOMER
- ----------------------------------------------------

Power sales and  special  services  supplied  by the Company to the  Customer in
order to meet its supplemental or interruptible  electric  requirements  will be
priced at the applicable retail rate or rates.

The Company will pay the Customer for any energy  purchased as calculated on the
standard purchase rate (see below).


MONTHLY PURCHASE RATE
- ---------------------

Rate for  pricing of energy,  net of that for the  customer's  own use,  that is
delivered to the Company:

                                                  Cents per kWh
                              --------------------------------------------------
                                    Non-Firm Power              Firm Power
                              ------------------------   -----------------------
                              On-Peak(1)   Off-Peak(2)   On-Peak(1)  Off-Peak(2)
                              ----------   -----------   ----------  -----------

    Summer Billing Cycles        1.58         1.17         2.20         1.52
    (June - October)

    Winter Billing Cycles        1.25         1.08         1.74         1.38
    (November - May)


(1) On-Peak Periods:       9 a.m. to 9 p.m., weekdays                       

(2) Off-Peak Periods:      All other hours


These rates are based on the Company's  estimated  avoided energy costs and will
be updated annually to reflect changes in the Company's fuel costs.



CONTRACT PERIOD
- ---------------

As provided for in the Purchase Agreement.


DEFINITIONS
- -----------

1.    Partial  Requirements  Service - A QF's system  configuration  whereby the
      ------------------------------
      output from its electric  generator(s) first go to supply its own electric
      requirements  with any excess energy (over and above its own  requirements
      at the time) then being sold to the  Company.  The  Company  supplies  the
      Customer's  supplemental  electric requirements (those not met by the QF's
      own-generation facilities).  This also may be referred to as the "parallel
      mode" of operation.

2.    Special  Service(s)  - The electric  service(s)  specified in this section
      -------------------
      that will be  provided  by the Company in addition to or in lieu of normal
      service(s).

      *    Interruptible  Power - Electric  energy or  capacity  supplied by the
           --------------------
           Company  subject  to  interruption  by the  Company  under  specified
           conditions  and under  agreed upon lead time  requirements  (Non-Firm
           Power).

3.    Non-Firm Power - Electric power which is supplied by the power producer at
      --------------
      the producer's option, where no firm guarantee is provided,  and the power
      can be interrupted by the power producer at any time.

4.    Firm Power - Power available, upon demand, at all times (except for forced
      ----------
      outages  and  scheduled  maintenance)  during  the  period  covered by the
      Purchase  Agreement  from the  Customer's  facilities  with an expected or
      demonstrated  reliability  which is greater  than or equal to the  average
      reliability of the Company's firm power sources.

5.    Time Periods - Mountain  Standard Time shall be used in the application of
      ------------
      this  rate  schedule.  Because  of  potential  differences  of the  timing
      devices,  there may be a  variation  of up to 15 minutes in timing for the
      pricing periods.


TERMS AND CONDITIONS
- --------------------

Subject to Company's  Schedule No. 2, "Terms and Conditions for Energy Purchases
from Qualified Cogeneration or Small Power Production Facilities",  or as it may
be amended or modified  from time to time by any  supplemental  or special Terms
and Conditions pursuant to Customer's Purchase Agreement with the Company.


METERING CONFIGURATION
- ----------------------



                               [GRAPHIC OMITTED]

[The omitted  material is a diagram of a bidirectional  meter which reads energy
flows from the Company into the customer for the  customer's  QF's load and also
reads the QF's generator's excess supply sold back to the Company.]




                                  Attachment 8
                                  ------------

                              Points of Agreement

                             RESTRUCTURING ELEMENT



         Staff  has   commenced  an   investigation   into   electric   industry
restructuring in Docket No. U-0000-94-165.  A Working Group and Task Forces were
established to obtain  information on possible options,  implementation of those
options,  and some of the  advantages  and  disadvantages  of those  options.  A
progress  report was issued on October 5, 1995  (Report of the Working  Group on
Retail Electric  Competition).  APS has actively participated in all the Working
Group efforts.

         These points of agreement  pertain to procedures and outcomes in Docket
No.  U-0000-94-165  regarding  electric  industry  restructuring.   The  parties
recognize  that the Commission  may also consider  other  procedural  issues and
outcomes.

         These  points of  agreement  do not  commit  either APS or the Staff to
assert any  particular  position  on the issues  identified  in  Paragraph  5 of
Procedural  Matters,  below,  nor do they commit the  Commission  to resolve any
issue in any particular  manner or in any particular time frame or sequence.  In
addition, these points of agreement do not preclude APS, the Staff, or any other
participant in Docket No. U-0000-94-165 from raising other issues not identified
in this document.

Procedural Matters
- ------------------

           1.       The  Commission's  process  for  developing  an  information
                    base and for  considering  electric  industry  restructuring
                    shall continue to be a public process open to all interested
                    parties.

           2.       In addition  to hearings  and  litigation,  a  collaborative
                    effort among some  interested  parties seeking common ground
                    may help resolve some  restructuring  issues;  APS and Staff
                    agree to participate in and support collaborative efforts in
                    good faith.

           3.       APS and Staff  agree to foster  resolution  of issues in the
                    restructuring Docket and in related activities.

           4.       Staff and APS agree that they shall urge the  Commission  to
                    consider the following issues as the Commission develops its
                    policies  regarding  restructuring,  recognizing  that other
                    issues may also be raised:

                    a.      The  legal   nature  of  electric   public   service
                            corporations' service rights and responsibilities.

                    b.      Electric public service corporations' obligations to
                            serve in a restructured environment.

                    c.      Compensation for restructuring, taking into account,
                            among other  matters:  the  estimated  magnitude  of
                            stranded  investment;  the  magnitude of  offsetting
                            increases  in the  market  value of  assets  such as
                            transmission or distribution  assets;  mitigation of
                            stranded   investment;    allocation   of   stranded
                            investment among utilities, consumers in competitive
                            markets,  and consumers in  noncompetitive  markets;
                            collection   mechanisms;   the  period   over  which
                            stranded investment is collected; and the impacts of
                            alternative   compensation   approaches   on  public
                            service  corporations,  lenders,  shareholders,  and
                            consumers over the long run.

                    d.      Clarification   of   federal-state    jurisdictional
                            uncertainties  and  possible   activities  in  other
                            forums,  including the Legislature and FERC, to help
                            resolve those uncertainties.

                    e.      Commission   jurisdiction   over   market   entrants
                            (including  independent power producers,  utilities,
                            and others) and  uniformity  of regulation of market
                            entrants.

                    f.      Maintenance   of   generation,   transmission,   and
                            distribution    system    reliability,     including
                            mechanisms and  responsibility  for services related
                            to reliability.

                    g.      Concerns  of public  power  entities  over which the
                            Commission  does  not  have  jurisdiction  regarding
                            restructuring.

                    h.      Access   by   Arizona    electric   public   service
                            corporations  to consumers  located in other service
                            territories  and the terms  for  access by others to
                            the    customers   of   Arizona    public    service
                            corporations.

                    i.      Whether  some  or all  consumers  should  be able to
                            access generation in a competitive marketplace, and,
                            if applicable,  the pace of introducing competition,
                            including phasing in of competition.

                    j.      Market  structure,  including  whether  and  how  to
                            require   or   induce   utility   divestiture   into
                            generation,  transmission,  distribution,  or  other
                            companies.

                    k.      Generation structure,  including the proper roles of
                            bilateral contracting and pooling of generation.

                    l.      Encouragement  of energy  efficiency  through demand
                            side  management  and  other  techniques,  including
                            competitively  neutral  allocation  of the  costs of
                            demand  side   management   programs  not  borne  by
                            participants.

                    m.      Encouragement of renewable energy resources  through
                            various  techniques,  such as  renewables  portfolio
                            requirements,  in a manner  which  does not put some
                            suppliers of electricity  to Arizona  consumers in a
                            relatively  less  competitive  situation  than other
                            suppliers.

                    n.      Encouragement  of  environmental   protection  in  a
                            manner   which  does  not  put  some   suppliers  of
                            electricity  to Arizona  consumers  in a  relatively
                            less competitive situation than other suppliers.

                    o.      Coordination  of   restructuring   with  the  public
                            interest in integrated resource planning.

                    p.      The proper  form of  regulation  for  noncompetitive
                            markets in generation and distribution.

                    q.      The effect of the market  power of  existing  public
                            service   corporations   on   the   development   of
                            competitive  generation markets,  and ways to reduce
                            any impediments to competition.

                    r.      The  affordability of electric  service,  especially
                            for low  income  consumer  and  consumers  in  rural
                            areas.

                    s.      Limitations  on the ability of cooperatives  to sell
                            electricity or transmission service to non-members.

                    t.      Transaction  costs of  participation  in competitive
                            markets.

                    u.      Impacts of  restructuring  on  employment  and other
                            economic factors.

                    v.      Utility  tax  structure  and its  impact on  Arizona
                            customers and companies.

Outcomes
- --------
           1.        The results of  restructuring  should  reflect a deliberate
                     process   which   considers   the   economic,    financial,
                     operational   and   system   planning   effects   of   such
                     restructuring.

           2.        Restructuring  of the electric  industry  should  result in
                     increased    efficiency   in   electric    markets,    with
                     nondiscriminatory  access to transmission  and distribution
                     facilities and services.

           3.        All major customer groups should benefit from  competition,
                     including residential customers.

           4.        Special needs programs,  such as lifeline programs,  should
                     be continued.

           5.        Transaction  costs of  participating in competitive markets
                     and consumer confusion should be minimized.

           6.        Fair dispute resolution process should be available.

           7.        The supply of electricity  should be reliable over the long
                     term, of adequate quality for consumers, and safe.

           8.        The investment  environment  should be conducive to raising
                     capital  necessary  to provide  long-term  electric  energy
                     services.

           9.        The electric industry should:

                     *      actively seek to protect the natural environment;
                     *      promote  renewable  generating  resources  to manage
                            uncertainty,  control costs, and meet consumer needs
                            over the long run;
                     *      encourage  efficiency in the use of electric energy,
                            including cost effective demand side management; and
                     *      maintain a long term planning perspective.


Expectations
- ------------

         Staff and APS  recognize  that there is a diversity  of opinion on many
matters. Staff and APS agree that the Commission should be requested to consider
all the procedural and outcome issues listed above in developing its policies on
restructuring.  The  Commission may use hearings and other  mechanisms  (such as
collaborative  approaches)  to achieve  resolution of the issues.  Staff and APS
agree that the market and  political  environments  may evolve  rapidly and that
timetables for introducing restructuring cannot be rigidly set a priori.





                                  ATTACHMENT 9
                                  ------------



            APS POSITION ON ISSUES RAISED BY INDUSTRY RESTRUCTURING
            -------------------------------------------------------

      The Points of Agreement to the  restructuring  element of the Plan,  which
are set forth in Attachment 8 to this Agreement,  deal with the electric utility
industry in Arizona. APS believes cooperative legislative and regulatory actions
at both the state and federal  levels will be necessary to permit broader access
to the  generation  market by  retail  customers  of  regulated  public  service
corporations in Arizona.  The steps proposed herein are presented by the Company
as a balanced,  comprehensive  package,  each part of which is  dependent on the
others.  APS will not be committed to support any  particular  part in the event
one or more other parts are dropped or materially  changed in the legislative or
regulatory  processes.  It is the Company's firm position that these issues must
be addressed and resolved prior to allowing open access in the retail markets of
Arizona public service corporations.

      As APS has pointed out during the  Commission's  Docket on  Competition In
The Electric Utility  Industry,  a number of legislative,  regulatory and market
issues  must be  satisfactorily  addressed  for  Arizona  to  benefit  from  the
increased economic  efficiency that competition  potentially can produce. By its
concurrence  to the Points of  Agreement  in  Attachment  8, Staff has  likewise
agreed to the  importance  of such issues.  In addition,  APS believes  that the
record should be clear as to its present position on industry restructuring. For
consistency sake, the Company has divided its comments using the  categorization
of issues from  Attachment  8.  However,  APS has retained  its own  descriptive
titles when referring to specific issues.

PROCEDURAL AND SUBSTANTIVE MATTERS

     Process for Considering Restructuring Issues

     As indicated by its  concurrence  in Attachment 8, APS agrees that industry
     restructuring  should be debated  and  resolved  in an open  process  after
     consideration  of  all  points  of  view.  The   Commission's   Docket  No.
     U-0000-94-165  provides an appropriate forum for this process,  although as
     noted  above,  both  the  Arizona  Legislature  and the U.S.  Congress  (in
     addition to FERC) will be important players in any  comprehensive  industry
     restructuring.

     Exclusive Service Rights

     In Arizona,  electric public service  corporations are granted  statutorily
     established  Certificates  of Convenience  and Necessity by the Commission.
     Under the  State's  concept of  "regulated  monopoly,"  these  certificates
     confer an exclusive  and perpetual  right to serve all  customers  within a
     delineated  territory  as long as the  utility  provides  or is  ready  and
     willing  to provide  reasonable  service  at  Commission-regulated  prices,
     sometimes referred to as the regulatory compact. This territorial right has
     been  characterized  by the  Arizona  Supreme  Court as a "vested  property
     right"  protected by the Arizona  Constitution  that cannot be condemned or
     otherwise "taken" without payment of adequate compensation. If the issue of
     compensation is adequately  addressed,  APS will support  legislation  that
     allows the Commission to open, on a "phased"  basis,  heretofore  exclusive
     electric  service  territories in Arizona to competition from all regulated
     electric public service corporations.

     Obligation To Serve

     In return for exclusive territorial rights, public service corporations are
     generally  required  to serve all  customers  requesting  service  (whether
     profitable or not) in accordance with rules and regulations  established by
     the  Commission.  This  obligation  to  serve is an  essential  part of the
     regulatory  compact  and  has  required  Arizona's  electric  utilities  to
     anticipate  customer  growth,  demand  and  usage and  prudently  invest in
     generation, transmission, distribution, and other utility assets. Unlike an
     enterprise in a fully competitive market, Arizona's electric public service
     corporations  cannot decide  unilaterally which markets they wish to serve,
     set the terms for providing  such service,  or determine  whether or not to
     expend the capital funds necessary to meet future demands.

     As customers gain access to other generation suppliers, this will require a
     symmetrical  change in the  obligation  of incumbent  suppliers so that the
     incumbent utility is not unfairly  burdened with  "provider-of-last-resort"
     status.  A  clear  breach  of the  regulatory  compact  will  occur  if the
     obligation to serve (and associated  cost burdens)  remains on a particular
     utility,  while its  competitors  are free to pick who,  how, and when they
     wish to serve.  Accordingly,  APS will support appropriate modifications to
     service  obligations of Arizona public service  corporations that recognize
     increasing  customer  options (at least with respect to  generation)  while
     still preserving the availability of reliable and affordable service.




     Compensation Issues

     Arizona  public  service  corporations  have  rightful  constitutional  and
     equitable  claims  for  compensation   relative  to  recovery  of  stranded
     investment, compensable property rights and wheeling charges; specifically,
     compensation is due for:

            (a)   investments in assets prudently made, or commitments prudently
                  incurred,  by an Arizona  public service  corporation  for the
                  benefit  of the  customers  in  its  service  territory  which
                  becomes "stranded", i.e., non-recoverable,  because of changes
                  in the regulatory compact;

            (b)   investments   "stranded"   because  of   accounting  or  other
                  regulatory   changes   occurring  in  the  transition  from  a
                  regulated monopoly environment to a competitive market;

            (c)   the loss of  constitutionally  protected property rights in an
                  exclusive  service  territory   conferred  by  the  Commission
                  pursuant  to  statute,  both  when the  exclusiveness  of such
                  service rights is phased out as to a particular customer class
                  and when the loss occurs as to a particular customer;

            (d)   wheeling  services by an incumbent public service  corporation
                  for dedicating a portion of its "wires" capacity and ancillary
                  services to accommodate a  competitor's  access to one or more
                  retail  customers  within the incumbent's  service  territory,
                  which compensation  should reflect  appropriate  charges fully
                  compensating the incumbent public service corporation for such
                  service,  regardless  of whether such charges are regulated by
                  FERC or the Commission.

            In the  economic  proposal of the Plan,  APS will take an  important
     step towards  mitigating  its  "stranded"  investment by  accelerating  the
     amortization  of  "regulatory  assets"  over an eight  (8) year  transition
     period.  The "7(cent) Result" which represents the Company's goal to reduce
     its per kWh cost by a combination of aggressive  cost  containment  and the
     development of new marketing  opportunities,  is another example of how APS
     hopes to  mitigate  the  compensable  damages it will  experience  upon the
     implementation of retail competition.

     Federal-State Jurisdictional Uncertainties

     Electric  power  commerce  across  the state and  region is  impeded by the
     jurisdictional  uncertainty  over the  conflicting  scope of federal versus
     state regulation in the utility industry.  Therefore, at the federal level,
     APS, in cooperation with the industry and others,  will seek  congressional
     legislation  that clarifies the right of states to authorize  retail access
     and related  terms and  conditions of service and to  effectively  regulate
     such transactions when necessary. The Company will also seek clarification,
     through legislation or by FERC actions,  that will clear the jurisdictional
     haze between the reach of federal  control over  transmission in interstate
     commerce and a state's critical ability to regulate and set retail rates.

     Competitive Balance

     Efficient competition will occur when all players,  including  out-of-state
     suppliers  entering the Arizona market,  are subject to the same rights and
     responsibilities,   free   from   market-distorting   special   privileges,
     regulations  or unequal  burdens.  APS will propose that any market entrant
     allowed  into a  previously  exclusive  territory  of a regulated  electric
     public service corporation pursuant to the legislation previously discussed
     regarding  "Exclusive  Service Rights" must itself be, or become,  a public
     service corporation subject to appropriate  Commission regulatory oversight
     and  related  obligations,  including  plant and line  siting  requirements
     (which  should be  administered  directly  by the  Commission)  and  shared
     responsibility  for maintaining  service  reliability.  Such entrants could
     include  out-of-state   utilities,   power  marketers,   independent  power
     producers and other competitors.

     Public Power Entities

     The Arizona Constitution expressly excludes municipal corporations from the
     category of entities  (public  service  corporations)  which it subjects to
     regulation by the Commission.  Due among other things to the  uncertainties
     that any amendment of the Constitution  would entail,  the Company proposes
     to exclude municipal,  tribal or other government-owned utilities from this
     restructuring proposal. Where such utilities have lawfully-conferred rights
     to serve all customers  within a delineated  territory,  those rights would
     remain intact (i.e., would not be subject to being "phased" out as proposed
     above  with  respect  to public  service  corporations);  conversely,  such
     utilities, by virtue of their not being public service corporations subject
     to Commission  regulatory oversight and related  obligations,  would not be
     allowed  competitive  access to public service  corporation  territories in
     Arizona.  However,  it appears to APS that changes in law and relationships
     at the federal  level,  such as  entitlements  to  preferential  power from
     federal facilities or federal income tax advantages, could lead to a common
     interest in  eliminating  or reducing  differences  among  utilities at the
     state level,  thereby  occasioning  future  reexamination of the difference
     proposed in this paragraph.

     Reciprocal Trade Opportunities

     Efficient  competition and the public interest  require that public service
     corporations be allowed the reciprocal opportunity to trade in each other's
     markets.   The  willingness  of  APS  to  open  its  service  territory  to
     competitors is contingent upon APS obtaining  meaningful  reciprocity  from
     such  competitors  and their  regulators.  The  Company's  desire to remove
     barriers  to entry  into  other  state  and  regional  markets  can only be
     achieved through Commission and State support and involvement.  The Company
     will urge federal legislation that will explicitly recognize the ability of
     states to condition the entry of out-of-state  power suppliers into Arizona
     upon on reciprocal opportunities for Arizona public service corporations in
     other states. Finally, APS will support amendments to federal laws, such as
     the  Public  Utility  Holding   Company  Act,  to  remove   artificial  and
     unnecessary  restraints on utilities that desire to compete in regional and
     national markets.

     Integrated Resource Planning

     APS  continues  to support  efficiency  in  electric  usage,  environmental
     protection  and  the  Commission's  Integrated  Resource  Planning  ("IRP")
     process.  Although the IRP is solidly  grounded in  traditional  regulatory
     principles,  many of APS'  potential  competitors  are exempt  from the IRP
     process. APS will ask the Commission to revise, consistent with the changes
     proposed  herein,  the current IRP process to  recognize  the  emergence of
     competition  and the need to maintain  generation  reliability  in a system
     with proliferating  suppliers.  APS will continue to support cost-effective
     DSM and renewables as long as competitively  neutral funding mechanisms are
     established.

     Market Structure

     The Company is, of course,  aware of proposals in other  jurisdictions  for
     mandatory  pooling of  generation  and for  separation  of  generation  and
     "wires" through mandatory divestiture.

     APS believes  mandatory  pooling is another form of  regulation,  one which
     presumably would be beyond the bounds of Commission  jurisdiction and which
     could well be more  pervasive  and  onerous  than  current  regulation  and
     ultimately  contrary to the  interests  of  customers.  APS  believes  that
     bilateral  contracting (which could be tri-or-more lateral when aggregators
     and  marketers  are   considered)   will  afford   effective   competition,
     particularly  if and  when  facilitated  by the  emergence  of an  exchange
     mechanism such as the NY Mercantile Exchange.

     Mandatory  divestiture in the Company's judgment  contravenes two important
     principles,  one of an engineering  nature and the other  economic.  System
     reliability  depends on both generation and wires--some entity will have to
     control  both  to  assure  an  effective  operating  system.  The  economic
     perspective is that there seems to be a natural  tendency  toward  vertical
     integration in analogous  situations:  United Kingdom  electric  companies;
     telecommunications  (where APS interprets the recent AT&T  announcement  of
     separation  of its  manufacturing  and service  functions  as a move toward
     re-integration of local and long-distance services and facilities).  Such a
     tendency   is   not   necessarily   anti-competitive;   in  the   case   of
     telecommunications,  the opposite is probably true. Additionally, mandatory
     divestiture could require a complete restructuring of contract rights under
     the  Company's   mortgage   indenture  and  other  financing   instruments;
     furthermore,  such divestiture  would be extremely  expensive to implement,
     and could  result in  significant  economic  dislocation  among  customers,
     bondholders and shareholders,  with no proven customer benefit.  The policy
     goal should be an  efficiently  functioning  generation  market,  free from
     concentration  of market power and from abuse of a monopoly  asset (such as
     transmission).  APS does not  believe  this  goal is  served  by  mandatory
     pooling  (which  may  actually  trend  in the  other  direction),  or  that
     mandatory divestiture is the appropriate answer to the monopoly asset issue
     in view of the necessity for system reliability.

     The market power issue is difficult to address  without knowing the size of
     the market, but that should come into view by 2000. By then there will have
     been  considerable  experience  with  wholesale  wheeling  by way  of  FERC
     standard  setting and  adversarial  proceedings.  APS considers it unlikely
     that any Arizona-based  electric utility will have excessive  dominion over
     the relevant  market as defined in 2000, or that the  Commission  will then
     need to do  anything  more about any wire  monopoly  in the field than what
     FERC will have by then already done in the wholesale field.

Phased Direct Retail Access

 Assuming  that the  economic  proposal  of the Plan is  approved,  and that the
 foregoing  issues have by then been resolved,  APS would request the Commission
 to authorize access by retail  customers of public service  corporations to the
 broad  generation  market starting in the year 2000. For its system,  APS would
 propose  that  initial  access  would  apply to retail  transmission  customers
 receiving  power at 69 kv or  above.  If this  proves  successful,  it would be
 expanded  approximately  two years later by allowing  access for all  customers
 whose  loads are  greater  than 3 mW and, by 2004,  access for  customers  with
 demand in excess of 1 mW. Access for all remaining  customers would be proposed
 at the  appropriate  time.  APS would expect that other Arizona  public service
 corporations  would propose  comparable  retail access  provisions that provide
 meaningful competitive opportunities.  Such retail access would not necessarily
 "deregulate"   utility   service  or  eliminate   the   Commission's   ultimate
 responsibility  to public service  corporations and their customers;  it would,
 however,  require  modifications  of the manner in which that oversight role is
 performed.

OUTCOMES

      APS would like to emphasize the first three (3) of the  "Outcomes"  listed
in Attachment 8.

      It is critical that electric  industry  restructuring  should be a careful
and  deliberative   process  that  fully  considers  the  economic,   financial,
operational,  and  system  planning  aspects  of  restructuring.   This  can  be
accomplished  by  addressing  and  resolving  issues before rather than after or
during the restructuring.

      The goal of any industry restructuring should be increased efficiency, and
hence lower costs.  Restructuring  "benefits" based on preditory  pricing,  cost
shifting,  or  shareholder  losses are illusory.  APS'  proposals to address the
compensation  issues and create  competitive  balance are intended to further an
outcome based on increased efficiency.

      Third,  all major customer groups should be permitted to benefit from this
increased  efficiency.  APS' proposals to maintain competitive  balance,  create
reciprocal  trade  opportunities,  and  preserve  the  Commission's  ability  to
effectively establish retail rates will help to make this preferred outcome more
achievable.

      APS proposes that the  Commission  specifically  address and resolve these
and  other  related  issues  through  a  series  of  hearings  during  1996  (as
contemplated by the Commission Staff in its Competition  Docket) which will seek
to develop appropriate  legislative and regulatory  solutions to these barriers.
These hearings would be held independent from the Commission's  consideration of
the  Agreement   described  above.  APS  believes  that  Commission  action,  in
consultation  with  interested  parties,  can  produce a set of  regulatory  and
legislative  reforms that can be presented to the Arizona Legislature and to the
U.S.  Congress in 1997.  However,  APS recognizes that the foregoing  issues are
difficult ones, legally and politically,  and that their resolution will require
time, particularly at the federal level.