AMERICAN INSTITUTE OF ARCHITECTS




                               AIA Document A311


                               PERFORMANCE BOND



Bond  Number  1328406


KNOW ALL MEN BY THESE PRESENTS: that Penn Wilson CNG as Principal, hereinafter
called Contractor, and Amwest Surety Insurance Company 330  North Brand, Suite
550,  Glendale,  CA  91203 as Surety, hereinafter called Surety,  are held and
firmly  bound unto A.E. Schmidt Environmental as Obligee, hereinafter  called,
Owner,  in  the  amount  of One Million Four Hundred Thirty One Thousand Three
Hundred  Nine  Dollars ($1,431,309.00), for the payment whereof Contractor and
Surety  bind  themselves,  their  heirs, executors, administrators, successors
and  assigns,  jointly  and  severally,  firmly  by  these  presents.

WHEREAS,

Contractor  has  by  written  agreement  dated  June  25, 1997, entered into a
contract  with  Owner  for

     Supply  and  install  compressed  natural  gas  fueling  station

which contract is by reference made a part hereof, and is hereinafter referred
to  as  the  Contract.


NOW,  THEREFORE  THE  CONDITION OF THIS OBLIGATION is such that, if Contractor
shall  promptly  and  faithfully  perform  said Contract, then this obligation
shall  be  null and void:  otherwise it shall remain in full force and effect.


     The  Surety  hereby  waives notice of any alteration or extension of time
made  by  the  Owner.

     Whenever  Contractor  shall  be,  and  declared by Owner to be in default
under the Contract, the Owner having performed Owner's obligations thereunder,
the  Surety  may  promptly  remedy  the  default,  or  shall  promptly

1)     Complete  the  contract in accordance with its terms and conditions, or

2)     Obtain a bid or bids for completing the Contract in accordance with its
terms  and  conditions,  and  upon  determination  by  Surety  of  the  lowest
responsible  bidder,  or, if the owner elects, upon determination by the Owner
and  the  Surety  jointly  of  the  lowest  responsible  bidder, arrange for a
contract  between such bidder and Owner, and make available as Work progresses
(even  though  there  should  be a default or succession of defaults under the
contract  or contracts of completion arranged under this paragraph) sufficient
funds  to  pay  the cast of completion less the balance of the contract price;
but  not exceeding, including other costs and damages for which the Surety may
be  liable hereunder, the amount set forth in the first paragraph hereof.  The
term  "balance  of  the contract price," as used in this paragraph, shall mean
the  total  amount  payable  by Owner to Contractor under the Contract and any
amendments  thereto,  less  the  amount  properly paid by Owner to Contractor.

     Any  suit under this bond must be instituted before the expiration of two
(2)  years  from the date on which final payment under the Contract falls due.

     No  right  of  action  shall accrue on this bond to or for the use of any
person  or  corporation  other  that  the  Owner  named  herein are the heirs,
executors,  administrators  or  successors  of  the  Owner.


Signed  and  sealed  this  11th  day  of  June  1997.

                                   /s/ John Weber
                                   Penn  Wilson  CNG
/s/ Dennis Ding                    -------------------------------------------
- ---------------------------------  (Principal)                          (Seal)
(Witness)
                                   -------------------------------------------
                                                     (Title)

                                   /s/ Kathy R. Mair
                                   Amwest  Surety  Insurance  Company
/s/ Fraizer Badran                 -------------------------------------------
- ---------------------------------  (Surety)                             (Seal)
(Witness)

                                   /s/ Jeffrey Strassner
                                   -------------------------------------------
                                   Jeffrey Strassner (Title)
                                   Attorney-in-Fact