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SECOR <br /> July 31, 1997 Into w1110lacrl I17(077)01-ated <br /> 1111- 51 <br /> David L Crow <br /> San Joaqum Valley Unified Air Pollution Control District <br /> 1999 Tuolumne Street, Suite 200 <br /> Fresno, CA 93721 r <br /> Subject: Quarterly Report on Thermal Oxidizer Operation <br /> Second Quarter 1997 <br /> Penrrut No N-3139-1-0 <br /> 440 West Charter Way, Stocton, CA <br /> Mr Crow <br /> Enclosed for your review is the Quarterly Momtormg Report for the period April through June <br /> 1997 for the above referenced site SECOR International Incorporated (SECOR) is forwarding <br /> you a copy of this report on behalf of Mr Dave Heinrich of Texaco Environment, Health& Safety fl <br /> (TEH&S) <br /> 4 <br /> The sod remediation system consists of four dual-completion vadose zone extraction wells, a <br /> vacuum blower, and a thermal oxidizer A SECOR technician visited the site bi-monthly to momtor <br /> the system Activities performed during these visits included equipment inspection, influent and <br /> effluent soil vapor concentration measurements, and control system adjustments A flame <br /> ionization detector (FID) was used by the technician to measure the soil vapor concentrations <br /> when the sort remediation system was operating Influent and effluent soil vapor samples were µ <br /> collected in Tedlar sample bags and submitted to V O C Analytical in Glendale, California for <br /> laboratory analysis h <br /> During this reporting period, the soil remediation system was 86% operational The system was <br /> not operatmg continuously due to a belt breaking and electrical power outages at the site The <br /> soil vapor analytical results and system efficiency results are enclosed with this report , <br /> Approximately 6,071 pounds of gasoline have been removed and treated at the site since the <br /> system began operating in January 1996 <br /> rt <br /> TES/S <br /> f <br /> N0001-eltionlChacterWay cov SECOR <br /> N0001-0a <br /> O6-OI July 3! 1997 <br /> '9k f <br /> x <br /> i <br /> f <br /> 17<47 I) i-i f0 i (Q)6) �0IO) 615 1 1\ <br />