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San Joaquin County DIRECTOR <br /> Donna Heran, REHS <br /> Environmental Health Department�•• _�<•.,pG p ASSISTANT DIRECTOR <br /> z: ? 600 East Main Street Laurie Cotulla, REHS <br /> a. <br /> N a <br /> :{ Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> • Mike Huggins, REHS, RDI <br /> Margaret Lagorio,REHS <br /> CqC/FOR�\P Website: www.sjgov.org/ehd Robert McClellon,REHS <br /> Phone: (209) 468-3420 Jeff Carruesco, REHS, RDI <br /> Fax: (209) 464-0138 Kasey Foley, REHS <br /> July 22, 2009 <br /> Mrs. Edna Moore <br /> 3400 Wagner Heights Road <br /> Apartment 346 <br /> Stockton, California 95209 <br /> Subject: Moore Truck Lines <br /> 3400 Newton Road <br /> Stockton, California 95205 <br /> The California State Water Resources Control Board (CSWRCB) adopted Resolution No. <br /> 2009-0042 on May 19, 2009. This resolution directs all contaminated underground storage <br /> tank sites currently under regulatory oversight by either the Regional Water Quality Control <br /> Board (RWQCB) or a Local Oversight Program (LOP) to reduce routine quarterly groundwater <br /> sampling of their monitoring wells to a semi-annual schedule unless site-specific needs <br /> warrant otherwise. <br /> The above subject site is currently listed with the San Joaquin County Environmental Health <br /> Department (EHD) LOP. This letter is to inform you that in accordance with CSWRCB <br /> resolution No. 2009-0042, and based on current and historical analytical data, the following <br /> groundwater sampling schedule should be followed: <br /> • Semi-annually sample groundwater from monitoring well MW-1 and analyze the <br /> samples for total petroleum hydrocarbons quantified as gasoline (TPH-g), benzene, <br /> toluene, ethyl benzene, and total xylenes (BTEX), 1,2-dichloroethane (1,2-DCA), <br /> tertiary-amyl methyl ether (TAME), and methyl tertiary-butyl ether (MTBE). <br /> • Annually sample groundwater from MW-5, MW-6, MW-7, MW-8 and domestic well <br /> DW-1 and analyze the samples for TPH-g, only. <br /> • Suspend collecting groundwater samples from MW-2, MW-3, and MW-4. <br /> For site closure consideration, the Central Valley Regional Water Quality Control Board is <br /> requiring a soil vapor evaluation. Submit an evaluation of the potential for vapor intrusion into <br /> structures at this site. Residual contaminant concentrations should be compared to <br /> Environmental Screening Levels (ESLs) established by the San Francisco Bay Regional <br /> Water Quality Control Board, for gross contamination and direct exposure, and California <br /> Human Health Screening Levels (CHHSLs) established by the California Environmental <br /> Protection Agency and an evaluation of the need to collect soil gas samples should be <br /> included. <br />