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IT Corpormaoo <br /> 4005 Port Chicago Highway <br /> Concord, CA 945201120 <br /> Tel 925 288 9898 <br /> W( Tax 925 288 0888 <br /> eVF*OUP. <br /> A Ale inbrr or7be 17 6roup <br /> HDI F <br /> 1 <br /> MAY 2 s 2002 <br /> ' May 20, 2002 ENVIRONMENT HEALTH <br /> Mr Bob DeNinno PERMIT/SERVICES <br /> 7-Eleven, Inc <br /> 3130 S Owyhee Street <br /> Boise, Idaho 83705 <br /> ' Subject First Quarter 2002 Monitoring and Sampling Report <br /> 7-Eleven Store No 21756 <br /> 853 E Yosemite Avenue <br /> ' Manteca, California 781723 <br /> Dear Mr DeNinno <br /> {� This First Quarter 2002 Monitoring and Sampling Report presents the results of monitoring and sampling <br /> activities performed by IT Corporation at the subject site (Figures 1 and 2, Attachment 1) on January 7, <br /> 2002 <br /> Additional site assessment required by the San Joaquin County Public Health Services/Environmental <br /> Health Department has been completed, findings and soil vapor extraction test results will be submitted <br /> I, under separate cover <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 /> (BTEX), total petroleum hydrocarbons-as-gasoline (TPH-G), the oxygenates methyl-tert-butyl <br /> ether(MTBE), tert-butanol (TBA), diisopropyl ether(DIPS), ethyl-tert-butyl ether (ETBE), and <br /> tert-amylmethyl ether(TAME) <br /> Groundwater Monitoring Data <br /> ' Before monitoring, the well caps were opened to allow the water in each well to stabilize to atmospheric <br /> i <br /> pressure The DTVI!was measured to the nearest 0 01 foot from the top of the well casing using an <br /> interface probe <br />