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Shaw Environmental $ Infrastructure, Inc <br /> 4005 Port Chicago Highway <br /> Concord, CA 94520-1120 <br /> 925 288 9898 <br /> Fax 925 288 0888 <br /> 111W The Shaw Group Inc <br /> December 24, 2002 DEC 3 0 2002 <br /> ENVIRONMENT I-IEALI H <br /> PERMIT/SERVICES <br /> Mr Bob DeNmno �` �� <br /> L�� <br /> 7-Eleven, Inc gee <br /> 10220 S W Greenburg Road, Suite 470 a ° 1 <br /> ' Portland, OR 97233 .! � <br /> Subject Fourth Quarter 2002 Monitoring, Sampling, and Remediation Progress Report ? f u <br /> 7-Eleven Store No 19976 + � , <br /> 1399 North Main Street <br /> Manteca, California �Q <br /> Shaw Project No 779956VIV <br /> Dear Mr DeNmno cw) <br /> >Jm <br /> This Fourth Quarter 2002 Monitoring, Sampling, and Remediation Progress Report includes the results of <br /> monitoring and sampling activities performed by Shaw Environmental, Inc (Shaw) at the subject site <br /> (Figures 1-3, Attachment 1)on October 3, 2002, and remediation events conducted during the fourth <br /> quarter 2002 A summary of activities conducted during this reporting period is provided below <br /> ' a Depth to water(DTW)was gauged in ten site-related groundwater monitoring wells (MW-1, <br /> MW-1A, MW-2, MW-3, MW-4, MW-4A, MW-5, MW-5A, MW-6, and MW-7) <br /> • Groundwater samples were collected from the monitoring wells and submitted to a California- <br /> certified laboratory for analysis of benzene, toluene, ethylbenzene and total xylenes (BTEX), <br /> total petroleum hydrocarbons-as-gasoline (TPN-G), methyl-tert-butyl-ether(MTBE), tert- <br /> butanol (TBA), diisopropyl ether (DIPS), ethyl-tert-butyl ether(ETBE), and tert-amylmethyl <br /> ' ether(TAME) <br /> Background <br /> 1 The site is an active 7-Eleven facility that dispenses gasoline The San Joaquin County Public Health <br /> ' Services (SJCPHS) has indicated that remediation will be required based on site levels of dissolved <br /> MTBE Specific site cleanup goals have not yet been established by the SJCPHS <br />/ 19976024 DOC <br />