Laserfiche WebLink
mow• � <br /> Advanced <br /> GeoEnvironme ntal, Inc. <br /> 29 September 2000 <br /> AGE-NC Project No. 95-0144 <br /> Mr. Jeff Wong _ J <br /> San Joaquin County PHS-EHD f f <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Proposed Scope of Work and Tentative Schedule <br /> Former CHASE CHEVROLET (MADISON) Facility <br /> 423 North Madison Street, Stockton, California <br /> Dear Mr. Wong: <br /> In accordance with the Remedial Action/Feasibility Pilot Tests Work Plan, dated 10 February 2000, <br /> prepared by Advanced GeoEnvironmental, Inc. (AGE),the following scope of work is proposed for the <br /> former underground storage tank(UST) areas at the above-referenced site: <br /> • Approximatelyl50 cubic yards of hydrocarbon-impacted soil will be excavated from the former <br /> UST No. I area. Soil will be excavated to an approximate depth of 18 feet below surface grade. <br /> Upon completion of excavation, soil samples will be collected from the floor and sidewalls of <br /> the excavation. The soil will most likely be transported off-site for disposal and "clean" fill <br /> material imported for backfilling purposes. <br /> • Two ground water extraction wells will be installed near the former UST No. 8 area. One well <br /> will be installed using a 4-inch diameter PVC casing;the second well will be installed using a <br /> 2-inch diameter PVC casing. <br /> • In-situ sparging wells IAS-1 and IAS-2 will be abandoned in accordance with San Joaquin <br /> County Public Health Services -Environmental Health Division (PHS-EHD) guidelines. <br /> • A limited(8-to 12-hour)ground water extraction test will be performed in the former UST No. <br /> 8 area to determine the feasibility of ground water"pump-and-treat". <br /> • Ground water samples will be collected from wells MW-21A and MW-21B and submitted for <br /> bioenumeration and physicochemical analysis. <br /> The above work has been previously approved by the San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS-EHD). <br /> In addition to the previously identified areas of hydrocarbon-impaction,during investigations at the site <br /> in December 1999 and April 2000, impacted soil and ground water were encountered in an area near the <br /> northwest corner of the property. A work plan addendum will be submitted to the PHS-EHD for the <br /> following: <br /> 4005 North Wilson Way. Stockton, California 95205 <br /> Telephonc (209}467-1006 FAX(209)467-1118 <br />