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' IT C'orporatio," <br /> 4005 Port Chicago H,ghuay <br /> Concord, CA 94520-1120 <br /> ' 7e1 925 288 9898 <br /> Fax 925 288 0888 <br /> og'Oup r1 hlemBrr of Tlir 17 U"rniip <br /> sv <br /> 1 March 30, 2001 <br /> f , Mr Bob ❑eNinno <br /> 7-Eleven, Inc <br /> 10220 S W Greenburg Road <br /> ' Portland, Oregon 97233 <br /> Subject First Quarter 2001 Monitoring and Sampling Report and Request for No Further Action <br /> ' 7-Eleven Store No 17647 <br /> 1048 West Yosemite Avenue <br /> Manteca, California <br /> IT Corporation Project 781721 <br /> 1 <br /> Dear Mr DeNrnno <br /> 1 This First Quarter 2001 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 15, <br /> 2001 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), ethyl4ert-butyl ether(ETRE), and tert- <br /> ' amylmethyl ether(TAME) <br /> ' Groundwater monitoring data indicate that this site is low-risk, 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 No further action is therefore formally <br /> requested at this time After completion of the second quarter 2001 monitoring event, groundwater <br /> monitoring will be suspended pending response to this request for no further action from the San Joaquin <br /> 1 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 <br /> ' interface probe <br /> 2175884 rpt <br /> 1 <br />