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• <br /> Advanced OCT 14 200 <br /> GeoEnvironmental, Inco <br /> I 1 October 2004 <br /> AGE-NC Project No. 97-0343 <br /> Ms. Lori Duncan <br /> SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Howard Lena,Property/Former Fisco Warehouse <br /> 1648 Shaw Road, Stockton, California <br /> Dear Ms. Duncan: <br /> In response to your letter dated 29 September 2004,advanced GeoEnvironmental, Inc. (AGE) has <br /> the following comments for your consideration: <br /> • Results of the July 2003 installation of a groundwater monitoring well was detailed in the <br /> Quarterly Report-Third Quarter 2003,prepared and submitted to your office dated 30 June <br /> 2004. If your office has not received a copy of this report, please contact us immediately. <br /> • Additional feasibility testing was recommended by AGE in the Soil Vapor Extraction Pilot <br /> Test Report, dated 16 May 2002. However, it is our understanding that the State Water <br /> Resources Control Board- Underground Storage Tank Cleanup Fund (USTCF) no longer <br /> supports the multiple (field) feasibility testing at sites. Furthermore, based upon the <br /> feasibility pilot test conducted at the site,it appears that soil vapor extraction (SVE)would <br /> be effective in removing contaminants from the vadose zone. Therefore, we no longer <br /> recommend the performance of additional (soil)feasibility studies at the site. <br /> • A Site Conceptual rvlodei(,SCIM)to identify the vertical and lateral extent of contamination <br /> and determine potential contaminant migration pathways should be prepared.AGE proposes <br /> including the SCM in a Problem assessment Report(PAR). <br /> • Based upon results of the SVE pilot test, AGE has recommended the preparation of a <br /> Remedial action Work Plan for the installation and operation of an SVE system at the site <br /> utilizing the existing in-place vapor well network. This recommendation was submitted in <br /> the afore-mentioned Quarterly Report-Third Quarter 2003. We propose preparation of the <br /> RAWP upon completion of the PAR. <br /> AGE is presently preparing an SCM for inclusion with the PAR.We would request your concurrence <br /> with the following schedule and submittal dates for reports preparation: <br /> 837 Shaw}toad,Stockton,California 95215 <br /> Telephone(209)467-1006 FAX(209) 467-1118 <br />