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� k <br /> • Soil Vapor Extraction <br /> During site visits,SECOR monitored system parameters and collected appropriate influent soil vapor <br /> samples Air samples were collected on July 23, 2002, August 6, 2002, and September 3, 2002 <br /> Based on the influent soil vapor samples analytical results, approximately 457 pounds of gasoline <br /> were removed and treated at an average extraction rate of 54 scfm for this reporting period A total <br /> of approximately 38,636 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 fourth quarter of 2002, 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 January 2003 <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 bonngs or data reported by other consultants <br /> or contractors <br /> Sincerely, ,g'��R 8 {0 <br /> SECOR International Incorporated ��a�o� o��%C�� <br /> / r � 0 1►la X063 0 I <br /> Todd J Brown dE Bower, R G 9 �� <br /> Associate Geologist Principal Geologist �OFCA4�F0?► <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\Time OW AckefordQ202 3 SBCOR <br /> 770T 41737 00 0003 <br /> I <br /> I <br />