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San Joaquin County <br /> Environmental Health Department OrRcroR <br /> Donna Heran,RENS <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205-6232 PROb RAnM COORDINATORS <br /> Jeff Carruesco, RENS,RDI <br /> ea' •.....•�i�a Website: wwwsjgov.org/ehd Kasey Foley,RENS <br /> Linda Turkatte,RENS <br /> Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> July 26, 2012 <br /> Ms. Sandi Sarale <br /> P.O. Box 6066 <br /> Stockton, California 95206 <br /> Subject: Sarale Farms <br /> 16500 West Clifton Court Road <br /> Stockton, California 95206 <br /> Dear Ms. Sarale: <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> No Further Action Required Report (report), dated 20 June 2012, submitted by your consulting <br /> firm, Advanced GeoEnvironmental, Inc. (AGE), on your behalf for the above-referenced site. By <br /> letter dated 10 January 2012, the EHD had directed that a site closure report be submitted to <br /> this agency that included among other things, an estimate when groundwater would return to <br /> water quality goals. <br /> Although AGE did discuss concentration trends for total petroleum hydrocarbons as gasoline <br /> (TPH-g), benzene, methyl tertiary-butyl ether (MTBE), and 1,2-dichlorcethane (1,2-DCA) in <br /> groundwater collected from historically impacted monitoring wells MW-1, MW-2 and MW-3, and <br /> provided trend graphs showing this information in the report, AGE did not provide an estimate <br /> when groundwater would return to water quality objectives. Please provide this information to <br /> the EHD at your earliest convenience. <br /> In the report, AGE stated that "Due to the shallow nature of the adsorbed hydrocarbon plume <br /> and the location of the plume with respect to on-site buildings, there are potentials for vapor <br /> intrusion to the on-site buildings. However, shallow soil samples collected during the <br /> (underground storage tank) UST line removal, near the building, were non-detect or low in <br /> concentration for petroleum hydrocarbons." The EHD cannot move this site to closure having <br /> been informed that the potential exists for soil vapor intrusion from petroleum hydrocarbon- <br /> impacted soil into existing on-site structures. The EHD must be confident that soil vapor <br /> intrusion is not a significant issue at this site. Please provide data or a model to demonstrate <br /> either the high or low threat posed by soil vapor. <br /> If you have any questions concerning the information requested by the EHD, please contact <br /> Vicki McCartney at (916) 488-4152 or by email at vmccartney@sjcehd.com. <br />