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etYATEcHXN0L00,,-S,INC <br /> 269 Mount Hermon Rd <br /> Sw1e 101 <br /> Scoffs Valley CA 95066 <br /> (408)436 7511 <br /> FAX(408)438 7515 <br /> 5 March 1992 <br /> Mr. Ali Mohammad <br /> San Joaquin Valley Unified Air District <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> SUBJECT: Soil Vapor Extraction and Treatment System at <br /> 909 W. Hammer Lane , Stockton, CA <br /> Dear Mr. Mohammad: <br /> The purpose of this letter is to confirm some points discussed over the <br /> phone with regards to the operation of a catalytic incinerator vacuum <br /> system at the subject site. <br />• 1 - Currently the catalytic incinerator system at the subject site is <br /> unable to maintain a minimum destruction efficiency of 95% required by <br /> the Authority to Construct Condition 3 due to very low influent <br /> concentrations at the subject site. <br /> 2 - EVAX Technologies, Inc. is allowed to operate the abatement system <br /> at destruction efficiencies below 95% as long as the overall system <br /> effluent to the atmosphere does not exceed 500 ppm total petroleum <br /> hydrocarbons calibrated as propane. Currently the soil gas emissions <br /> to the atmosphere is less than 0.04 lbs. per day. <br /> 3 - Arrangements will be made to schedule a site inspection by the San <br /> Joaquin Valley Unified Air District. Based on favorable inspection <br /> findings, a Permit to Operate will be issued by the SJVUAD. <br /> 4 - EVAX will file for a modification to the current abatement system <br /> at the subject site. The nature of the modification will be to replace <br /> the catalytic incineration system with a Granular Activated Carbon <br /> (GAC) System as an abatement device. <br /> I would very much appreciate if you would contact me if any of the <br /> above are not accurate. <br /> Sincerely, <br /> . EVAX Technologies, Inc. <br /> Shaw Garakani <br /> Project Engineer <br /> cc: Marla Guensler, EXXON <br />