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r <br /> San Joaquin County DIRECTOR <br /> Donna Heran, REHS <br /> C, Environmental Health Department,p M ASSISTANT DIRECTOR <br /> 600 East Main Street <br /> Laurie Cotulla,REHS <br /> z Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> ., --- Carl Borgman,REHS <br /> • p .. �_'�c • s ov.or /ehd Mike Huggins,REHS, RDI <br /> Website: www <br /> jg 9 Margaret Lagorio,REHS <br /> Phone: (209) 468-3420 Robert McClellon,REHS <br /> Fax: (209) 464.0138 Jeff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> ROBERT KUPKA JUL 2 3 2007 <br /> LODI AIRPORT CORPORATION <br /> P O BOX 10 <br /> ACAMPO CA 95220 <br /> RE: Golden Eagle Aviation <br /> 23987 N. Highway 99 <br /> Acampo, California 95220 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Soil Vapor <br /> Survey Work Plan dated July 11, 2007, prepared and submitted by Advanced <br /> GeoEnvironmental, Inc. (AGE) on your behalf for the above-referenced site. This work <br /> plan was submitted in response to EHD's letter dated May 14, 2007, requesting an <br /> evaluation for potential vapor intrusion into the buildings located at your site. <br /> In this work plan, AGE proposes to advance a total of ten soil borings near the former <br /> underground storage tank location and adjacent to the west and south sides of the existing <br /> restaurant. Two proposed borings will be advanced to approximately five feet below <br /> surface grade (bsg) using either a van-mounted Geoprobe 5400 unit or hand auger, and <br /> soil samples will be collected at approximately two and five feet bsg from each borehole. <br /> Soil lithology will be documented and soil samples will be field screened for the presence <br /> of volatile organic compounds using an organic vapor meter equipped with photo- <br /> ionization detector. Eight proposed soil borings will be advanced to approximately five <br /> feet bsg using either a van-mounted Geoprobe 5400 unit or a slide hammer, and soil gas <br /> samples will be collected in Tedlar bags from within a half-foot of total depth from each <br /> borehole. <br /> EHD approves the work plan as submitted. Although it is unclear what analyses will be <br /> performed on the soil and soil gas samples, the samples should be analyzed for total <br /> petroleum hydrocarbons quantified as aviation fuel (TPH-ag); benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX); and methyl tertiary-butyl ether (MTBE). Soil <br /> gas reporting limits for all chemicals of concern must be less than or equal to residential <br /> Environmental Screening Levels (ESLs) and California Human Health Screening Levels <br /> (CHHSLs) for soil gas published by San Francisco Bay Regional Water Quality Control <br /> Board. <br />