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s <br /> California Tank Lines, Inc. Page 2 of 2 <br /> 3105 South EI Dorado Street October 30, 2013 <br /> Stockton, California 95206 <br /> collected near the site of the former waste oil tank and analyzed for selected contaminants listed <br /> in Table 2 of Appendix A to the Tri-Regional Board Staff Recommendations for Preliminary <br /> Investigation and Evaluation of Underground Storage Tank Sites. To this end, EHD directs that <br /> during the next sampling event only, analyze groundwater from monitoring well MW-2 for total <br /> petroleum hydrocarbons as gasoline (TPH-g); total extractable hydrocarbons as diesel (TPH-d); <br /> total extractable hydrocarbons as motor oil (TPH-mo); the entire suite of method 8260B <br /> compounds that must include: benzene, toluene, ethylbenzene, total xylenes (BTEX); methyl <br /> tertiary-butyl ether (MTBE); ethyl tertiary-butyl ether (ETBE); tertiary-amyl methyl ether (TAME); <br /> di-isopropyl ether (DIPE); tertiary-butyl alcohol (TBA); naphthalene; methanol; ethanol; <br /> 1,2-dichloroethane (1,2-DCA); and 1,2-dichloroethane (EDB); the entire suite of 82706 <br /> compounds; oil and grease by method 1664A; and the following metals: cadmium by method <br /> 7131A, lead by method 7421, nickel by method 7521, and chromium and copper by method <br /> 6010B. If groundwater from MW-2 is not able to be analyzed, then analyze groundwater from <br /> monitoring well MW-5 for the above-listed analyses. <br /> The EHD requires the above information, in addition to providing the data from analyzing <br /> groundwater from monitoring well MW-1 for TPH-d, TPH-g and BTEX; and MW-4 for TPH-g, <br /> BTEX, 1,2-DCA, DIPE and TBA, as the EHD considers this site for closure. Should you have <br /> any questions or concerns regarding this letter, please contact Vicki McCartney at (209) 468- <br /> 9852, or by email at vmccartney@sjcehd.com. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c. Mr. Anderson Doran, Donan Environmental Services, Inc., Post Office Box 1839, Vista, <br /> California, 92085-1839 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />