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San Joaquin .County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> 600 East Main Street <br /> c: ""� PROGRAM COORDINATORS <br /> u). " :� Stockton, California 9520273029 Robert McClellan,RENS <br /> Jeff Carruesco,REHS,RDI <br /> s: <br /> 0.. •.:— • ,\'P Website: www.sJgov.org/ehd Kasey Foley,RENS <br /> ��F o RN Linda Turkafte,REHS <br /> Phone:: (209) 468-3420- <br /> Fax: (209)464-0138 <br /> January 10, 2012 <br /> Mr. John Johnson <br /> Former Cheaper Store Number 37 <br /> 765 Eubanks Drive, Suite D <br /> Vacaville, California 95688 <br /> Subject: Former Cheaper Store Number 37 <br /> 15 East Grant Line Road <br /> Tracy, California 95376-2720 <br /> Dear Mr. Johnson: <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Case <br /> Closure Request(report), dated 24 October 2011, prepared and submitted by ATC Associates <br /> Inc. (ATC) on your behalf for the above-referenced site. By letter dated 05 August 2011, the <br /> EHD had directed a closure summary report be submitted to this agency. The EHD <br /> emphasized the .need to adequately address the health risk to humans and the environment <br /> posed by the high concentrations of total petroleum hydrocarbons quantified as gasoline <br /> (TPH-g) detected in soil gas samples when submitting the closure summary report. <br /> In the report, ATC stated that TPH-g was reported at moderate to elevated concentrations" <br /> but noted that California Human Health Screening Levels (CHHSLs), prepared by the <br /> California Environmental Protection Agency, have not been established for TPH-g in soil gas. <br /> ATC also noted that "TPHv" concentrations exceeded the established Environmental <br /> Screening Levels (ESLs) for commercial/industrial exposure of soil gas found in Table E: <br /> Indoor Air and Soil Gas (Vapor Intrusion Concerns) of Screening for Environmental Concerns <br /> at Sites with Contaminated Soil and Groundwater, Interim Final, dated November 2007 and <br /> revised in May 2008, prepared by the California Regional Water Quality Control Board, San <br /> Francisco Bay Region. <br /> TPH-g was reported by two different analytical laboratories at 3,700,000 micrograms per cubic <br /> meter (pg/m) in soil gas sample SG3. This concentration is well above the ESL of 29,000 <br /> Ng/m3 for TPH-g and the EHD believes this soil gas concentration poses a potential hazard to <br /> humans and the environment. The EHD will not consider this site for closure until this issue <br /> has been properly addressed. Submit your response to this agency within thirty days of date <br /> of this letter. <br /> i <br />