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San Joaquin County <br /> PAWN � Environmental Health Department DIRECTOR <br /> M Donna Heran, REHS <br /> 600 East Main Street <br /> PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> • �y.., �:P Website: www.sjgov.org/ehd <br /> c F°R Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> May 7, 2010 <br /> Mr. Robert Kupka <br /> Lodi Airport Corporation <br /> Post Office Box 10 <br /> Acampo, California 95220 <br /> Subject: Golden Eagle Aviation <br /> 23987 North Highway 99 <br /> Acampo, California 95220 <br /> Dear Mr. Kupka: <br /> By letter dated July 13, 2009, the San Joaquin County Environmental Health Department <br /> (EHD) concurred with the proposal presented by your consulting firm, Advanced <br /> GeoEnvironmental, Inc. (AGE), to advance temporary soil vapor wells in the vicinity of the <br /> southwest corner of the Lodi Airport cafe building and the east side of the Lodi Airport office <br /> building and directed the submittal of a work plan to assess the extent of the soil gas <br /> contamination in the described area. To date the EHD has not received this work plan. <br /> The EHD also expressed concern reporting soil gas samples for total petroleum hydrocarbons <br /> quantified as aviation gasoline (TPH-ag) by method T03; and methyl tertiary-butyl ether <br /> (MTBE); benzene, toluene, ethylbenzene, and total xylenes (BTEX); and isopropyl alcohol <br /> (IPA) by method T015 since the associated quality assurance/quality control data were <br /> submitted using a water matrix and methods 8015M for TPH-g, and 8260B for MTBE, BTEX, <br /> and IPA. The EHD requested clarification whether vapor-phase calibration standards were <br /> used to generate the initial calibration and daily calibration check as opposed to water-phase <br /> calibration standards used to generate the initial calibration and daily calibration check <br /> associated with the soil gas samples. To date the EHD has not received a response <br /> concerning this matter. <br /> Considering the high concentrations of TPH-ag detected in temporary vapor points V6, V7, <br /> and V8, at 1,960,000; 73,500; and 138,000 micrograms per cubic meter (Ng/m3), respectively, <br /> you are directed to submit a work plan to the EHD within thirty days of the date of this letter for <br /> installing temporary soil vapor wells, and address whether vapor-phase or water-phase <br /> standards were used to generate the initial calibration and daily calibration check. <br /> The EHD has not received a report of findings for monitoring and sampling the wells in 2009 <br /> at your site. Monitoring wells MW-1 through MW-3 and the domestic well are to be sampled <br /> annually and if groundwater cannot be collected from ail four wells during a sampling event, <br />