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' IT Corporation <br /> 4005 fort Chmd o 111bhu'iy <br /> Concord CA 945101110 <br /> T,1 925 288 9898 0 <br /> 10helax 925 288 0888 <br /> *OUP. <br /> A dh nnLr r of rill It f,roiep <br /> �f <br /> D � <br /> i <br /> S� <br /> ' July 9,2001 <br /> Mr Bob DeNinno <br /> 7-Eleven, Inc <br /> 10220 S W Greenburg Road <br /> ' Portland,Oregon 97233 <br /> Subject Second Quarter 2001 Monitoring and Sampling Report <br /> 7-Eleven Store No 17647 <br /> ' 1048 West Yosemite Avenue <br /> Manteca, California <br /> IT Corporation Project 781721 <br /> Dear Mr DeNmno <br /> This Second Quarter 2001 Monitoring and Sampling Report presents the results of monitoring and sampling <br /> 1 activities performed by IT Corporation at the subject site (Figures 1 and 2,Attachment 1)on April 4,2001 A <br /> 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),total petroleum hydrocarbons-as-gasoline (TPH-G),the oxygenates methyl4ert-butyl-ether <br /> (MTBE),tert butanoi (TBA),dusopropyl ether(DIPE), ethyl-tert-butyl ether (ETBE),and tert- <br /> amylmethyl ether(TAME) <br /> ' Groundwater monitoring data indicate that this site is low-nsk, based on 1)sustained levels of low to non- <br /> detectable hydrocarbon concentrations in all of the monitoring wells for the last year,and 2) no nearby <br /> sensitive receptors within 4,000 feet downgradient of the site <br /> ' s been requested as of March,2001 A response to this request is sbR pending from the <br /> No further action has q <br /> San Joaquin County Environmental Health Department(SJCEHD) <br /> Groundwater Monitoring Data <br /> Before monitoring,the well caps were opened to allow the water in each well to stabilize to atmospheric <br /> pressure The DTW was measured to the nearest 0 01 foot from the top of the well casing using an interface <br /> / probe <br /> 21756g4 rot <br /> 1 <br />