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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 2,979 pounds of gasoline <br /> were removed and treated at an average extraction rate of 187 scfm for this reporting period A total <br /> of approximately 29,680 pounds of gasoline has been removed and treated at the site since the SVE <br /> system began operation T e soil vapor analytical results and system efficiency results are included <br /> as Attachment III <br /> ` ✓✓ FORTHCOMING ACTIVITIES <br /> During the first 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 /> summarized in a quarterly monitoring report to be submitted to you in April 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 borings or data reported by other consultants <br /> or contractors <br /> Sincerely, , aEE.DBp0�0 <br /> SECOR International Incorporated t�C? p' �Y GAN <br /> No.6065 <br /> Todd J Brown John E Bower, R CA`�FOQ' <br /> Project Geologist Principal Geologist <br /> TJB/JEB tb <br /> Attachments <br /> cc Harlin Knoll, San Joaquin County Public Health Services <br /> Elizabeth Thayer, California Regional Water Quality Control Board <br /> • C Mme 01NackefardQ400 3 SECOR <br /> 077A1737 003 <br /> February 1 2001 <br />