Laserfiche WebLink
AEGIS ENVIRONMENTAL , INC . <br /> 801 Riverside Avenue,Suite C,Roseville,CA 95678 + <br /> 916.782-2110/916.969-2110/FAX 916.786-7830 <br /> November 5, 1990 „ <br /> * - <br /> San Joaquin County4 <br /> s <br /> Public Health Services FNV NAV <br /> 3Environmental Health Division r�'ONM <br /> 445North AttnaSan <br /> Jain 95201 p nor Ratliff R�`T� <br /> _Stockton, California <br /> Subject: Shell Oil Co. Gasoline Station at <br /> 2320 North El Dorado Street in Stockton, California <br /> Dear Ms. Ratliff: <br /> This correspondence addresses the factors affecting the leaching <br /> potential of contaminants found in soil at the subject site. Field <br /> notes taken during the excavations identify the site soil as <br /> cohesive, competent clay and silty clay which typically exhibit low <br /> permeability. The soil samples that indicated product piping leaks <br /> were collected at a shallow depth of approximately 1 to 2 feet <br /> below grade. Over-excavation to a maximum depth of 4 . 5 feet below <br /> grade was performed to remediate the targeted soils. Laboratory <br /> analysis verified the success of over-excavation. The resulting <br /> excavations were modified further to accomodate the placement of a <br /> : new, double-wall fiberglass piping system. The levels of xylenes <br /> and toluene are marginally above LUFT leaching potential analysis <br /> recommendations to protect ground water. Given the characteristics <br /> of the soil and the depth to ground water, Aegis considers the risk <br /> to ground water to be negligible. Therefore, site closure is <br /> requested of the San Joaquin County Environmental Health Division. <br /> = - Thank-1'.^L'---for- yo r,,cooperation In thls..matter_._ <br /> Sincerely, <br /> AEGIS ENVIRONMENTAL, INC. <br /> Larry Braybrooks <br /> Staff Geologist <br /> cc: Diane Lundquist, Shell Oil Co. <br /> Douglas Sheeks, Aegis Environmental , Inc. <br /> GEOLOGISTS ENGINEERS GROUND WATER SCIENTISTS <br />