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10540 White RocL Road Suite 180 <br /> Rancho Cordoi a,L-thforma 95670 <br /> 1 el (916)444-0123 <br /> Faa (910)635 8805 <br /> wwu hrostinandcaldwell corn <br /> July 21,2006 <br /> r W N A N t <br /> — ' Mr Michael Infurna R E H S <br /> San Joaquin County Environmental Health Department <br /> 304 E Weber Avenue Third Floor <br /> Stockton, California 95202-2708 017/128253-003/1 <br /> Subject Soil Vapor Extraction and Air Sparge Pilot Test Letter Report, <br /> T&T Trucking,Lodi, California <br /> Dear Mr Infurna <br /> This letter report presents the results of the soil vapor extraction (SVE) and Air <br /> Sparge (AS) pilot test conducted at the T&T Trucking (Site) located in Lodi, <br /> California (Figure 1) The approach and procedures used for the SVE pilot test <br /> are summarized in the Work Plan for Soil Vapor Extraction Well Installation and <br /> Soil Vapor Extraction and Air Sparge Pilot Tests (Brown and Caldwell, 2005) <br /> presented to and approved by San Joaquin County Environmental Health <br /> Department by letter dated November 17, 2005 <br /> A site investigation was conducted in 2003 to assess impacts to soil and <br /> groundwater beneath the Site As discussed in the Subsurface Investigation <br /> Results and Site Conceptual Model (Brown and Caldwell, 2004),the soil and <br /> groundwater beneath the Site have been impacted with gasoline and its <br /> constituents including the fuel oxygenate methyl tert butyl ether (MTBE) The <br /> subsurface investigation futher indicates that the source of these impacts is in the <br /> vicinity of the former gasoline underground storage tank (UST) <br /> On May 3 through 16,2006,Brown and Caldwell conducted a SVE/AS pilot test <br /> in order to design a remediation system for the Site This letter report presents the <br /> methods and procedures used for installation of the vapor extraction wells (VEW) <br /> and a summary of the results of the SVE/AS pilot test <br /> Pilot Test Methods and Procedures <br /> Prior to conducting field work, a drilling permit was obtained from San Joaquin <br /> County Environmental Health, and an authority to construct (ATC) permit was <br /> i' <br /> P\28000\128253 1'&I I mcknng SVE\Documents\SVE Report amw doc <br />