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Project 00760.02 11 February 1991 <br /> Y - <br /> accumulator/water knockout device. - The combustor unit and <br /> accumulator/water knockout-device were placed: within a protective fenced <br /> enclosure. The combustor unit ' was designed to 'destroy by combustion - <br /> . hydrocarbon gases in the extracted soil gases' beforegases are discharged <br /> into the atmosphere. After permitting through the San Joaquin County Air <br /> Pollution- Control -District, the-system equipment was delivered' to. the <br /> site, installed on,: an equipment pad,-.and connected .to the extraction <br /> _system already in place. A propane .'trap wagon that served as a <br /> supplemental fuel source ,was kept in the ;enclosure with the system <br /> equipment.- A site plan of,,.the extraction system and: system equipment is <br /> presented in Figure 1._ <br /> OPERATION," MAINTENANCE. AND "MONITORING <br /> The combustor unit -'was designed to operate�cont.inuously 24 hours a day. <br /> EVAX personnel ; periodically monitored -the vapor extraction and <br /> rremediation . system. Monitoring included analyses of the influent" to <br /> document the progress of the remediation': ..In addition, compliance <br /> sampling: of the exhaust stream to the atmosphere -was conducted to ensure <br /> the system operated:within permitted-,emission guidelines. . :The extraction <br /> points were also; monitored. Extraction at;,- an individual well or probe <br /> was discontinued when. hydrocarbon vapor•concentraton was reduced in the <br /> vicinity of that well or probe. <br /> EVAX recommends that a copy of this report be -submitted to Ms. Laurie A. <br /> - Services Environmental <br /> Cotulla of the": Sa.n Joaquin :County Publ �c .Heal;th , <br /> Health Division. <br /> If .you have any. questions,. please do not hesitate to ,call:: <br /> Sincerely, <br /> EVAX Technologies, Inc. <br /> Christopher J. Peoples e <br /> :Project Engineer <br /> tw <br /> Enclosure: Site Plan <br /> Monitoring Summary - <br /> _ 2 _ <br />