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- �_ kik T ,. � p� ��• �' r cz' a - zx" ¢�u _ � <br /> Mobil Chi! Corporation 1!{. tion WCC V,US I A L�11EpA MfNUE.SUITE 7W <br /> i u LIPBANK,CALIFCANIA'JI'A547,71 <br /> 1- <br /> February 5, 1991 <br /> Ms. Laurie Cotulla, RENS MOBIL OIL CORPORATION <br /> San Joaquin Co. Public Health FORMER SIS 30--NP4 <br /> Environmental Health Division 2375 TRACY BOULEVARD <br /> 1601 East Hazelton Avenue TRACY, CALIFORNIA <br /> Stockton, CA 95201 BP 5/S 11194 <br /> Dear Ms. Cotulla: <br /> Enclosed for your .information is the Ground Water Monitoring and <br /> Sampling Report, dated December 17, 1990, for subject location. <br /> The dissolved BTEX plume remained fairly constant with the prior <br /> sgmpling. The plume remains defined to the west by mW-1 and <br /> MW-2, to the north and down gradient by MW-7, and to the south <br /> and up gradient by AMW-2, all of which were ND. No free product <br /> was observed in ary of the monitoring wells. <br /> A preliminary remedial planning and feasibility will be prepared <br /> and submitted for your approval. It appears, however, that a <br /> coordinated effort is required with the other service station <br /> sites at this corner to concurrently monitor and sample any <br /> r additional groundwater monitoring wells to determine the full <br /> extent of the problem. This data should be shared to help <br /> develop a clean-up of the potentially commingled plumes. <br /> if you have any questions, please feel free to contact me at <br /> (818) 953-2519. <br /> sincerely, <br /> 5 <br /> David M. Noe, P.E. <br /> Groundwater Projects Engineer <br /> DMU/st <br /> enclosure <br /> cc: Mr. Thomas Peltier (w/ enclosure) <br /> RWQCB - Central Valley Region <br /> 3443 Routier Road <br /> Sacramento,--CA- 95827-_------ - ---- - <br /> m�tnm�mnan.rsr�ertR7AN�R <br />