Laserfiche WebLink
Geological rechmics Enc. ti <br /> 110 1 76 Street <br /> Modem Califomia 95354 APR O <br /> (209)522-4119/Fax(209)522-4227 2 2004 <br /> ENVIRONiVILNT HEALTH <br /> March 29, 2004 PERMIT/SERVICES <br /> Project No.: 750.2 <br /> Project Name: City of Escalon(Arco) <br /> Technical Review Team <br /> State Water Resources Control Board <br /> 2014 T Street, Suite 130 <br /> P.O. Box 944212 <br /> Sacramento, CA 94244-2120 <br /> RE: Cost Pre-Approval: Vapor Extraction and Groundwater Monitoring <br /> Location: Former Arco Gas Mini Mart, 1305 Escalon Ave, Escalon, CA <br /> USTCFP: Claim No. 013929 <br /> Dear Technical Reviewer: <br /> On behalf of the City of Escalon, GTI has prepared the following Cost Pre--Approval for the <br /> attached SJC-EHD directive dated February 20, 2004, for Installation of a 200-cfm blower and <br /> two granulated activated carbon canisters, influent and effluent air sampling, groundwater <br /> monitoring and reporting for the Former Arco Gas Mini Mart site located at 1305 Escalon Ave., <br /> Escalon, California. <br /> The following supporting documents are attached: <br /> ■ SJC-EHD directive <br /> ■ Bid from Del-Tech Geotechnical Support <br /> ■ Bid from US Filters <br /> ■ Itemized spreadsheet of costs for performing this work <br /> Summary of Work Performed <br /> • February 12 & 23, 1999, GTI drilled six boreholes, collected soil and groundwater samples <br /> (via hydropunch methods) <br /> • April 29, 1999, GTI installed MW-2,VEW-1 and VEW-2 <br /> • June 11, 1999, GTI installed MW-3 <br /> • July 30, 1999,GTI installed MW-1,VEW-3 and VEW-4 <br /> • April 18, 2000, GTI performed a groundwater monitoring event <br /> • June 12,2000, GTT performed a vapor extraction pilot test <br /> • October 18 and 19, 2000, GTI supervised the installation of two water table and one deep <br /> monitoring wells(MW-4, MW-5 and MW-101) <br /> • February 2002, GTI supervised the installation and start-up of a Internal Combustion Vapor <br /> Extraction Treatment System <br /> • Groundwater monitoring has been ongoing on a quarterly basis <br />