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r �t <br /> • through W-8), two groundwater monitor wells modified for SVE (MW-1 and MW-3) and four air <br /> sparge wells (AS-1 through AS-4) with catalytic oxidation treatment A Site Plan depicting the <br /> locations of the remediation wells, subsurface piping, and remediation equipment compound is <br /> included as Figure 4 Initial start-up air discharge compliance testing was completed on December <br /> 13, 1999 The San Joaquin County Valley Air Pollution Control District(SJVAPCD)has approved <br /> an air permit for the site During site visits, SECOR monitored system parameters and collected <br /> appropriate influent soil vapor samples <br /> Based on the influent soil vapor samples analytical results,approximately 2,251 pounds of gasoline <br /> were removed and treated at an average extraction rate of 193 scfm for this reporting period A total <br /> of approximately 33,790 pounds of gasoline has been removed and treated at the site since the SVE <br /> system began operation The soil vapor analytical results and system efficiency results are included <br /> as Attachment III <br /> FORTHCOMING ACTIVITIES <br /> During the third quarter of 2001, SECOR will conduct additional monitoring, sampling and <br /> remediation system operation and maintenance activities The results of these activities will be <br /> sun-manzed in a quarterly monitoring report to be submitted to you in October 2001. <br /> This report presents our understanding of existing conditions at the subject site The conclusions <br /> contained herein are based on the analytical results and professional judgment which are in <br /> • accordance with current standards of professional practice, no other warranty is expressed or <br /> implied SECOR assumes no liability for exploratory bon ngs or data reported by other consultants <br /> or contractors <br /> �C�p•ED GF�� <br /> Sincerely, SC4.TT p <br /> SECOR International Incorporated w GABLE <br /> No 6366 0 <br /> Exp <br /> Todd JBrown John E Bower' R GO CAL-�aC <br /> � a <br /> Project Geologist Principal Geologist <br /> TJB/JEB do <br /> Attachments <br /> cc Harlin Knoll, San Joaquin County Public Health Services <br /> Elizabeth Thayer, California Regional Water Quality Control Board <br /> C(Time oimt keror*Uwt 1 SECOR <br /> Wn 41737 003 July 31 2001 <br />