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PY S11L�� T� TCIS � (Co ' o @� 3330 Cameron Park Drive, Ste 550 ENVIRONMENTAL,fNC. � Cameron Park, California 95682 (530)676-6004 Fox:(530)676-6005 ACNP N1��IS�R January 23, 2003 Project No. 2007-065-01 Ms. Jan Sudomier San Joaquin Valley Air Pollution Control District 4230 Kiernan Avenue, Suite 130 Modesto, California 95356-9322 Re: Authority to Construct Soil Vapor Extraction and Abatement System at USA Gasoline Service Station No. 65, located at 2600 West Lodi Avenue, Lodi, California. Dear Ms. Sudomier: Stratus Environmental, Inc. {Stratus) has prepared this letter on behalf of USA Gasoline Corporation (USA) to request an authority to construct and permit to operate the soil vapor extraction system (SVE) at USA Service Station No. 65, 2500 West Lodi Avenue, Lodi, California (Figure 1). A completed application for Authority to Construct (ATC), supplemental information for soil and groundwater remediation and a check in the amount of$60 are presented in Appendix A. Stratus proposes to install and operate a 150 cubic feet per minute soil vapor extraction (SVE) system consisting of 5 horsepower (hp) Roots positive displacement blower and two 1,000 pounds US Filter's Vent Scrub carbon adsorption vessels. Petroleum hydrocarbon laden soil vapors will be extracted using 5 hp blower and abated using granular activated carbon prior to discharge to the atmosphere. The SVE system will be operated 24 hours a day, 7 days a week, and 52 weeks a year,beginning February 2003. Prior to this application, a SVE system consisting of 150 standard cubic feet per minute (cfm) Stealth Bobcat catalytic oxidizer was operated at the site between August 15, 2000 and August 15, 2002, under permit N-903-2-0. A 5 hp Roots positive displacement blower was used to extract soil vapors which were then abated in the catalytic oxidizer prior to discharge to atmosphere. During this two-year operational period, approximately 3,457 pounds of total petroleum hydrocarbon as gasoline (TPHG) was removed by the soil vapor extraction system. Due to low influent concentrations, which resulted in high electrical consumption, this SVE system was shut down on August 15, 2002 (letter dated August 21, 2002). The operational and analytical summary for Stealth Bobcat catalytic oxidizer is presented in Appendix B. Soil Vapor Extraction and Abatement Petroleum hydrocarbon vapors will be extracted from extraction wells S-1, S-2, and MW-8 (see Figure 2) using a 5 hp Roots rotary positive displacement blower package rated at 150 cfm @ 8" Hg. The extracted soil vapors will be abated using granular activated carbon in two 1,000 pound PAUSA Gasoline100651Correspondencelusa 65 ATC for Carbon.doc