SITE INFORMATION AND CORRESPONDENCE

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Addendum to General Services Contract Canepa's Car Wash — 6230 Pacific Street February 21 , 2001 Page -2- TASK 2 - Project Planning and Regulatory Agency Negotiations • This task includes Condor consulting hours associated with meetings and correspondence with the client, the SJC PHS/EHD, the SJVAPCD, and the California Regional Water Quality Control Board (CRWQCB). Condor anticipates extensive negotiations and correspondence with all concerned parties regarding site disposition and SVE system evaluation and potential reconfiguration. TASK 3 — Continued Quarterly Groundwater Monitoring Condor will conduct continued quarterly groundwater monitoring at the site. The quarterly groundwater monitoring program consists of collecting groundwater elevation measurements from the eight existing monitor wells and a groundwater sample from the existing monitor wells and one of the nine site SVE wells. Costs for one year (four quarters) of groundwater monitoring are included in this Contract Addendum. Any new monitor wells installed at the site resulting from required additional site characterization will be incorporated into the quarterly groundwater monitoring program. Costs for monitoring of any monitor wells installed in the future- are not included in this Contract Addendum . At the client's request, Condor can provide an additional Contract Addendum for additional quarterly groundwater monitoring events if they are necessary. For each monitoring event, groundwater samples collected from the monitor wells and SVE well will be analyzed for benzene, toluene, ethyl benzene, and total xylenes (BTEX), and MTBE by EPA Method 8020 and total petroleum hydrocarbons quantified as gasoline (TPH-G) by EPA Method 5030/LUFT. For each monitoring event, Condor will prepare a quarterly groundwater monitoring report for submittal to the CRWQCB and the SJC PHS/EHD. Each report will include site background information, a description of the field work and monitoring results, a discussion of well monitoring data to date, site maps showing groundwater elevation and chemical iso-concentration contours, and laboratory reports that include analytical methods, sample detection limits, and results of-die analyses. TASK 4 — SVE System Evaluation and Potential Reconfiguration • Condor will evaluate efficiency of the SVE system in a reconfigured operational mode_ Potential reconfigured operations will be evaluated by testing the system efficiency with a photoionization detector. The system may be operated in a pulsed manner to increase the system efficiency and allow continuation of the vapor extraction in accordance with the requirements of the SJVAPCD permit while greatly reducing fuel consumption. The results of the evaluation will be included in either one of the quarterly groundwater monitoring reports or in a stand-alone document, if necessary. TASK 5 — SVE System Operations and Maintenance • Following the completion of the SVE system evaluation and potential reconfiguration, Condor will operate and maintain the SVE system as directed by the San Joaquin County PHS/EHD. For the purposes of cost estimation, Condor anticipates that two site visits a month will be necessary to lubricate machinery and collect data to monitor the reconfigured operational efficiency of the SVE- Maintenance will include time and materials as needed to replace, repair, or further reconfigure components of the SVE.