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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 /> sanaW The Shaw Group Inc' <br /> October 22, 2002 1�. LL� <br /> O C T 3 0 2002 <br /> Mr Bob DeNinno ENVIRONMENT HEALTH <br /> ' 7-Eleven, Inc PERMIT/SERVICES <br /> 10220 S W Greenburg Road, Suite 470 <br /> Portland, OR 97223 <br /> ' Subject Third Quarter 2002 Status Report <br /> 7-Eleven Store No 17647 <br /> 1048 West Yosemite Avenue <br /> t Manteca, California <br /> Shaw Project No 781721 <br /> ' Dear Mr DeNinno <br /> This Third Quarter 2002 Status Report presents the results of monitoring and sampling activities <br /> performed by Shaw Environmental, Inc (formerly known as IT Corporation) at the subject site <br /> (Attachment 1, Figure 1) on July 1, 2002 The site has been submitted for closure to the San Joaquin <br /> County Department of Public Health Services (SJCPHS) Third quarter monitoring data was collected <br /> ' pending expected receipt of no further action (NFA) by the end of the calendar year Fourth quarter <br /> monitoring will be suspended pending verification of NFA approval <br /> A summary of activities conducted during this reporting period is provided below <br /> • Depth to water(DTW) was gauged in three site-related groundwater monitoring wells <br /> ' • Groundwater samples were collected from the three monitoring wells and submitted to a <br /> California-certified laboratory for analysis of benzene, toluene, ethylbenzene and total xylenes <br /> ' (STEX) (EPA Method 8020), total petroleum hydrocarbons-as-gasoline (TPH-G) (EPA Method <br /> 8015), oxygenates methyl-tert-butyl-ether(MTBE), tert-butanol (TBA), dnsopropyl ether(DIPE), <br /> ethyl-tert-butyl ether(ETBE), tert-amylmethyl ether(TAME), ethylene dibromide (EDB) and <br /> 1,2-dichloroethane (1,2-DCA) (EPA Method 8260) <br /> ' Background <br /> ' There are no active fueling facilities at this location On December 4, 1998, two 10,000-gallon and one <br /> 6,000-gallon single-wall steel underground storage tanks (USTs)were removed from the site Six soil <br /> samples were collected from beneath the ends of the USTs at depths of 14 feet below grade(bg), and two <br /> side wall samples were collected at depths of 6 feet bg, at the direction of SJCPHS (IT Corporation, <br /> January 1999) <br /> 1 <br />