August 7, 1997

ATC HOLDINGS, INC.
17911 Von Karman, Suite #500
Irvine, CA 92714

Reference is made to that certain Note dated August 7, 1997 executed by you 
evidencing Imperial Bank's (Bank) loan to you in the amount of $6,000,000.00 
(Note). Notwithstanding the terms contained in the Note for the payment of 
monthly interest as it accrues, you shall be allowed to pay monthly interest 
on the unpaid principal balance of the Note at a rate lower than the accrual 
rate stated in the Note (Payment Rate) with the remaining balance of the 
monthly interest which is accruing on the Note being charged on a monthly 
basis against any unused Net Earnings Credit calculated by Bank in connection 
with deposit accounts maintained or cause to be maintained by you with Bank 
calculated on a monthly basis, less the sum of all costs of Bank for services 
provided to you during such month, computed in accordance with Bank's normal 
and customary standards and Bank's reasonable determination of the amounts 
thereof shall be final and binding upon you. The initial Payment Rate shall 
be 0.25% per annum and shall be subject to increase at any time and from time 
to time in Bank's absolute discretion based on the availability of Earning 
Credit.

Sincerely,                              ACKNOWLEDGED:


D.M. Farmer                             ATC HOLDINGS, INC.
Senior Vice President


                                        By: /s/ Michael Lowther
                                            --------------------------------


                                        By: /s/ Wayne Diaz
                                            --------------------------------


The following provisions are hereby added to the Note between ATC HOLDINGS, 
INC. and IMPERIAL BANK.

     "REFERENCE PROVISION

1.   Other than (i) non-judicial foreclosure and all matters in connection 
therewith regarding security interests in real or personal property; or (ii) 
the appointment of a receiver, or the exercise of other provisional remedies 
(any and all of which may be initiated pursuant to applicable law), each 
controversy, dispute or claim between the parties arising out of or relating 
to this Note ("Agreement"), which controversy, dispute or claim is not 
settled in writing within thirty (30) days after the "Claim Date" (defined as 
the date on which a party subject to the Agreement gives written notice to 
all other parties that a controversy, dispute or claim exists), will be 
settled by a reference proceeding in California in accordance with the 
provisions of Section 638 ET SEQ. of the California Code of Civil Procedure, 
or their successor section ("CCP"), which shall constitute the exclusive 
remedy for the settlement of any controversy, dispute or claim concerning 
this Agreement, including whether such controversy, dispute or claim is 
subject to the reference proceeding and except as set forth above, the 
parties waive their rights to initiate any legal proceedings against each 
other in any court or jurisdiction other than the Superior Court in the 
County where the real property securing this Agreement, if any, is located or 
Los Angeles County if none (the "Court"). The referee shall be a retired 
Judge of the Court selected by mutual agreement of the parties, and if they 
cannot so agree within forty-five (45) days after the Claim Date, the referee 
shall be promptly selected by the presiding Judge of the Court (or his 
representative). The referee shall be appointed to sit as a temporary judge, 
with all of the powers of a temporary judge, as authorized by law, and upon 
selection should take and subscribe to the oath of office as provided for in 
Rule 244 of the California Rules of Court (or any subsequently enacted Rule). 
Each party shall have one peremptory challenge pursuant to CCP Section 170.6. 
The referee shall (a) be requested to set the matter for hearing within sixty 
(60) days after the Claim Date and (b) try any and all issues of law or fact 
and report a statement of decision upon them, if possible, within ninety (90) 
days of the Claim Date. Any decision rendered by the referee will be final, 
binding and conclusive and judgment shall be entered pursuant to CCP Section 
644 in any court in the State of California having jurisdiction. Any party 
may apply for a reference proceeding at any time after thirty (30) days 
following notice to any other party of the nature of the controversy, dispute 
or claim, by filing a petition for a hearing and/or trial. All discovery 
permitted by this Agreement shall be completed no later than fifteen (15) 
days before the first hearing date established by the referee. The referee 
may extend such period in the event of a party's refusal to provide requested 
discovery for any reason whatsoever, including, without limitation, legal 
objections raised to such discovery or unavailability of a witness due to 
absence or illness. No party shall be entitled to "priority" in conducting 
discovery. Depositions may be taken by either party upon seven (7) days 
written notice, and request for production or inspection of documents shall 
be responded to within  Ten (10) days after service. All disputes relating to 
discovery which cannot be resolved by the parties shall be submitted to the 
referee whose decision shall be final and binding upon the parties. Pending 
appointment of the referee as provided herein, the Superior Court is 
empowered to issue temporary and/or provisional remedies, as appropriate.

2.   Except as expressly set forth in this Agreement, the referee shall 
determine the manner in which the reference proceeding is conducted 
including the time and place of all hearings, the order of presentation of 
evidence, and all other questions that arise with respect to the course of 
the reference proceeding. All proceedings



and hearings conducted before the referee, except for trial, shall be 
conducted without a court reporter, except that when any party so requests, a 
court reporter will be used at any hearing conducted before the referee. The 
party making such a request shall have the obligation to arrange for and pay 
for the court reporter. The costs of the court reporter at the trial shall be 
borne equally by the parties.

3.   The referee shall be required to determine all issues in accordance with 
existing case law and the statutory laws of the State of California. The 
rules of evidence applicable to proceedings at law in the State of California 
will be applicable to the reference proceeding. The referee shall be 
empowered to enter equitable as well as legal relief, to provide all 
temporary and/or provisional remedies and to enter equitable orders that will 
be binding upon the parties. The referee shall issue a single judgment at the 
close of the reference proceeding which shall dispose of all of the claims of 
the parties that are the subject of the reference. The parties hereto 
expressly reserve the right to contest or appeal from the final judgment or 
any appealable order or appealable judgment entered by the referee. The 
parties hereto expressly reserve the right to findings of fact, conclusions 
of law, a written statement of decision, and the right to move for a new 
trial or a different judgment, which new trial, if granted, is also to be a 
reference proceeding under this provision.

4.   In the event that the enabling legislation which provides for 
appointment of a referee is repealed (and no successor statute is enacted), 
any dispute between the parties that would otherwise be determined by the 
reference procedure herein described will be resolved and determined by 
arbitration. The arbitration will be conducted by a retired judge of the 
Court, in accordance with the California Arbitration Act, Section 1280 
through Section 1294,2 of the CCP amended from time to time. The limitations 
with respect to discovery as set forth hereinabove shall apply to any such 
arbitration proceeding."




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