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San Joaquin County <br /> Environmental Health Department <br /> DIRECTOR <br /> a: <br /> 600 East Main Street Donna Heran,REHS <br /> "' ` Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> Jeff Carruesco,REHS, RDI <br /> ci i .6 d Website:www.sjgov.Org/ehd Kasey Foley,REHS <br /> Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> March 15, 2010 <br /> Ms. Mabel Keir Ms. Nereida P. Lopez <br /> 1103 Grantland Court P. O. Box 6569 <br /> Modesto, California 95350 Stockton, California 95206 <br /> Subject: Lopez Prop rties <br /> 1601 Turnpike Road <br /> Stockton, California 95206 <br /> Dear Ms. Keir and Ms. Lopez: <br /> The San Joaquin Cou ty Environmental Health Department (EHD) has reviewed Quarterly <br /> Groundwater Monitorin Report — Fourth Quarter 2009, dated February 15, 2010, prepared <br /> and submitted by Advanced GeoEnviron mental, Inc. (AGE) on your behalf for the above- <br /> referenced site. Based on the analytical results from the monitoring and sampling event on <br /> December 7, 2009, AGE has recommended that monitoring well MW-2 be sampled semi- <br /> annually and MW-9 be sampled annually. The EHD concurs with this recommendation. <br /> Beginning the second quarter 2010, the EHD approves the following groundwater sampling <br /> and analysis schedule: <br /> • Collect groundwater samples semi-annually from monitoring wells: MW-1, MW-2, <br /> MW-5, MW-8, MW-10 and MW-11; analyze the samples for total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g); benzene, toluene, ethylbenzene, and <br /> total xylenes (BI EX); di-isopropyl ether (DIPE), tertiary-amyl methyl ether (TAME), <br /> and 1,2-dichloroethane (1,2-DCA). <br /> • Collect groundwater samples annually from monitoring wells MW-3, MW-4, and <br /> MW-9, and anal ze the samples for TPH-g and BTEX. <br /> • Collect groundwater samples biennially from monitoring wells MW-6 and MW-7 and <br /> analyze the samples for TPH-g and BTEX. <br /> By letter dated October 22, 2009, the EHD approved the installation of MW-12. AGE has <br /> informed the EHD that this well has not been installed because the off-site property owner has <br /> not signed the access agreement. The EHD recommends that you move the location for the <br /> proposed well to the City of Stockton right-of-way on the east side of French Camp/Turnpike <br /> Road, adjacent to the originally proposed location, and complete the installation of this well by <br /> May 19, 2010. Submit a copy of the encroachment permit issued by the City of Stockton, a <br /> boring permit application and permit/inspection fee of $434, and notify the EHD of scheduled <br /> fieldwork at least a week prior to installing the well. <br />