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9-04-1997 4:05PM• FROM AGE NC 209 956 0700 P. 1 <br /> � <br /> Advanced <br /> GeoEnvironment <br /> aj ne. <br /> of Northern Calf fnrnia. <br /> 05 September 1996 <br /> AGE-NC Project No.95-0135 <br /> Mr.Ron Rowe <br /> SAN JOAQUIN COUNTY PHS-E1II7 ` <br /> 304 East Weber Street,3'a Floor <br /> Stockton,CA 95201 <br /> Subject: Additional Soil and.Ground Water Investigation . <br /> DEN'S AUTO REPAIR . <br /> 308 South El Dorado.Street,Stockton,California <br /> Dear Mr.Rowe: <br /> In response to your facsimile letter dated 21 August 1997,Advanced GeoEnvironmental,Inc.(AGE)presents <br /> the following for your consideration: <br /> l. During the June 1997 investigation,ground water depth at the site was determined to be 31.5 feet <br /> below surface grade(bsg). <br /> 2. A historical survey of ground water depths in the area was performed by AGE.Data obtained from <br /> California Water Service(CWS)and the San Joaquin:County Flood Control Office indicates that <br /> ground water depth in the area of the site has.been as tow as 70 feet bsg. <br /> 3. AGE proposes the collection of at least one discrete grab ground water sample from a depth of 70. <br /> feet bsg to best define the potential vertical migration of petroleum hydrocarbons at the site. <br /> 4. Selected soil and groundwater samples will be analyzed. for volatile.organic compounds in' <br /> accordance with EPA method 8260 for identification of oxygenate additives. <br /> A drilling pen-nit and permit fee were previously submitted to the PHS-EHD.Field activities are scheduled <br /> to commence on 08 September 1997.If you have any questions or require further information,please contact <br /> our office at(209)956-0264. <br /> Sincerely, <br /> Advanced GeoEnvironmental,Inc. <br /> W <br /> William Little <br /> Staff Geologist <br /> 1803 West March Lane,Suite A,Stockton,California 95207 <br /> Telephone(209)956=0264 FAX(209)956=0700 <br />