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HORIZON ENVIRONMENTAL INC. <br /> Specialists in Site Assessment,Remedial Testing, Design and Operation <br /> RECEIVED <br /> October 3, 2014 OCT 0 6 20 14 <br /> Ms. Angelica Marin ENVIRONMENTALHEALTI-1 <br /> San Joaquin County Environmental Health Department PERMITISERVICES <br /> 1868 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Subject: Soil Borings Work Plan and Permit Applications <br /> Ultramar Station No. 3641, 1210 East Hammer Lane, Stockton, California <br /> Ms. Marin: <br /> At the request of Ultramar Inc. (Ultramar), Horizon Environmental Inc. (Horizon) is <br /> submitting this work plan and permit application for the advancement of four soil borings at <br /> the subject site (Site). The work is being conducted to provide Ultramar with baseline <br /> environmental data prior to pending site divestment. <br /> The Site was opened to the San Joaquin County Environmental Health Department(EHD) in <br /> October 1995 on the basis of soil samples collected during removal of underground storage <br /> tanks. The Site was investigated, monitored and remediated until December 2011 when the <br /> EHD received no-further-action-required (NFAR) concurrence from the Regional Water <br /> Quality Control Board. Destruction of all site wells was completed in February 2013. The <br /> EHD issued an NFAR letter for the Site in March 2013. <br /> The baseline assessment shall include advancement by hollow-stem auger equipment of four <br /> soil borings at the locations shown on the enclosed Site Map. The soil boring locations shall <br /> be cleared for utilities by air knife to 5 feet below surface grade (bsg). Soil samples shall be <br /> collected at 5-feet intervals from 5 to 25 feet bsg. Drill cuttings and water shall be stored on <br /> site in separate DOT-approved 55-gallon drums pending disposal characterization. <br /> Selected soil samples shall be analyzed for total petroleum hydrocarbons as gasoline <br /> (TPHg), the volatile aromatic compounds benzene, toluene, ethylbenzene, xylenes (BTEX), <br /> the five fuel oxygenates methyl-butyl ether (MTBE), diisopropyl ether, ethyl-t-butyl ether, <br /> tert-amyl methyl ether and tert butanol by EPA Methed 8260B. A 4-point drill cuttings <br /> composite sample shall be analyzed for TPHg, BTEX, MTBE by EPA Method 8260B and <br /> for total lead by EPA Method 6010. <br /> Enclosed is a check in the amount of $1300 to cover the site mitigation fee ($390), <br /> inspection fee ($390) and permit fee ($520). Also enclosed are: Licensed Contractor <br /> Declaration; a Master File Record; and Health and Safety Plan. <br /> 4970 Windplay Drive,#C5 - EI Dorado Hills,CA 95762 - (916)939-2170 - FAX(916)939-2172 <br /> PO.Box 5283 - Bakersfield,CA 93388 - (661)589-8389 - FAX(661)589-1456 <br />