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SOIL VAPOR EXTRACTION SYSTEM INSTALLATION AND EFFICIENCY REPORT 7r for CANEPA'S CAR WASH June 25, 1999 1 0 INTRODUCTION This report describes the installation and operation of the soil vapor extraction (SVE) system at Canepa's Car Wash located at 6230 Pacific Avenue in Stockton, California (Figure 1, Appendix A) The SVE system was installed to remediate gasoline-contaminated soil associated with three underground storage tanks (USTs) formerly located at the site Installation of the SVE system was authorized by the San Joaquin County Public Health Services/Environmental Health Division (SJCPHS/EHD) on May 30, 1997, via approval of the work plan prepared by Condor Earth Technologies, Inc (Condor) titled Catalytic Oxidation (CHIT--OSI? System Invtallation and Mom1w ing, dated May 28, 1997 Phis reportwas prepared by Condor at the request of the property owner, Mr Remo Canepa and includes an executive summary, site background information, a description of the SVE system installation (i e well construction, pipe installation, manifolding, and SVE configuration), and a discussion of the testing conducted to evaluate the efficiency of the SVE system 2 0 EXECUTIVE SUMMARY The SVE system at Canepa's Car Wash was piovided by the California Underground Storage Tani.Clean Up Fund (Fund) and was manufactured by Burners and Controls I he system was previously located at 825 East Main Street in Turlock, California and operated under the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD), Authority to Construct (ATC) #N-3297-1-0 The SVE system ' was installed at the Canepa site in early March 1999 Fhe SVE system was connected to the existing SVE wells previously installed at the site On March 9, 1999, an initial inspection was conducted by Ms Diane Busalacchi of the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) to initiate operation of the SVE system However, a volatile organic compound (VOC) destruction efficiency of 95% was not demonstrated and consequently, the start up of the SVE system was aborted A second inspection was conducted on March ' 15, 1999 and a VOC destruction efficiency exceeding 95% was demonstrated The system is operating in compliance with the STVUAPCD ATC peimit unit N-174-2-0 dated March 16, 1998 The system is currently utilizing nine SVE wells and is monitored on a weekly basis ' From. March 15 through May 31, 1999, the system was operational 50 of the 78 days (64 % operational) Measurements of the soil vapor concentrations indicate an average VOC destruction efficiency of greater than 99% Based on periodic monitoring of hydrocarbon vapor concentrations measured with a photoionization detector (PID) at the system inlet, hydrocarbon removal rates have ranged from approximately 18 58 pounds per day (lbs/day) oil March 19, 1999 to 131 57 lbs/day oil May 4, 1999 The average removal rate was 62 lbs/day Approximate]), 3,100 lbs of hydrocarbons have been extracted from the subsurface and incinerated by the existing SVE system since operation of the system was initiated on March 15, 1999 The VOC emission rates hax e ranged from less than 0 10 to 0 76 lbs/day, which is below, the 2 lbs/da) limit stipulated in the SJVUAPCD ATC permit Vacuum measurements recoided on March 17, 18, and 19, 1999 for the extraction wells indicate the radius of influc.nc.e at pcnmeter wells SVE 1 2, 3, 7 8, and 9 is greater than 20 feet L� CONDOR