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1 <br /> 2701 Prospect Park Dnve <br /> Sacramento California 95670 <br /> ' Tel (916)444 0123 <br /> Fax (916)635-8805 r"' <br /> I�� � <br /> www brownandLaldwell com +`� <br /> ' July 14, Zoos JUL 1 5 2005 <br /> 8WIRONMENT HEALTH ` <br /> PERMIT/SERVICES 11 <br /> 0 <br /> 5 <br /> 6 l <br /> Mr Michael lnfurna R E H S /V(•1/.�."/,/�/ <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue <br /> ' Stockton, California 95202 017/128233-200/1 <br /> Subject Work Plan for Remediation Well Installation and Soil Vapor <br /> ' a Extraction and Air Sparge Pilot Tests, T&T Trucking Inc, 11396 <br /> North 99 Highway, Lodz, California <br />' Dear Mr Infurna <br /> On behalf of T&T Trucking Inc , Brown and Caldwell (BC) is pleased to submit <br /> this work plan for extraction well installation and soil vapor extraction (SVE) and <br /> air sparge (AS) pilot tests at the subject site (Figure 1) <br /> Groundwater beneath the site has been impacted by petroleum hydrocarbons and <br />' associated fuel oxygenates Groundwater monitoring data indicate methyl-tertiary <br /> butyl ether (MtBE) and total petroleum hydrocarbons as gasoline (TPH-g) are the <br /> primary constituents of concern and the plume has been horizontally defined in <br /> the Subsurface Investigation Results and Site Conceptual Model dated <br /> June 28, 2004 <br /> The work proposed in this workplan will be conducted in two phases The first <br /> phase of work will consist of the installation of two SVE wells to be used in the <br />' SVE pilot test The second phase of work will consist of a SVE and AS pilot <br /> testing using the new SVE wells (VEW-1 and VEW-2) and monitoring well <br /> MW-1 <br />' In SVE, a vacuum is placed on soil in the non-saturated zone SVE technology <br /> serves to volatilize contaminants to the vapor phase and remove these vapor phase <br />' contaminants from the subsurface Once the vapor is removed from the soil it is <br /> cleaned by either thermal, catalytic oxidation, or granular activated carbon (GAC), <br /> dependant on the concentration of hydrocarbons in the effluent from the blower <br />' The purpose of this pilot test is to determine the concentration of hydrocarbons in <br /> the vapor removed from the soil, the radius of influence (ROI) of the SVE well, <br /> and which SVE treatment technology is best suited for use on the site <br /> 1'\28000\128253- 1&1 IruckingSV]-\Work Plan%ic doc <br />' E n v z r o n m e n t a l Engine er s 6- C o n s u l t a n t s <br />