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IT Corporation <br /> 4005 fort Chicago Highway <br /> Concord, CA 945201120 <br /> 7 el 925 288 9898 <br /> 4%he Fax 925 288 0888 <br /> (t;group. f1 A&ffibr r of lhr IT Croup <br /> R —((-!-h"- 8 vir:1 <br /> December 13, 2001r 17 <br /> 1 <br /> Mr Bob DeNinno JAN 0 9 2002 <br /> 1 7-Eleven, Inc ENVIRONMENT HEALTH <br /> 3130 S Owyhee Street PERMIT/SERVICES <br /> Boise, ID 83705 <br /> 1 Subject Fourth 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 DeNinno <br /> This Fourth 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 October 5, 2001 <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 /> 1 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-ether <br /> (MTBE),tert-butanol (TBA),diisopropyl ether(DIPS), ethyl-tert-butyl ether (ETBE), and tert- <br /> amylmethyl ether(TAME) <br /> A September 26,2001 conversation with Mr Harlin Knoll of the San Joaquin County Environmental Health <br /> ' Department(SJCEHD) indicated that no further action (requested initially in March,2001)would be reviewed <br /> after completion of <br /> ' - Sampling of all groundwater monitoring wells at the site for 1,2-dichloroethane (1,2-DCA) and <br /> ethylene dibromide (EDB) <br /> ' - Collection of selected soil samples and at least one grab groundwater sample downg radient of <br /> the existing well configuration to complete plume delineation, results to be submitted with a <br /> residual mass calculation <br /> The foregoing data is proposed to be collected during the first quarter 2002, pending approval of the Pre- <br /> Closure Sampling Workplan dated October 4, 2001 There are no active fueling facilities at this location <br /> 1 <br />