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Quarterly Monitoring July 2001 and Sensitive Receptor Survey Report Canepa's Car Wash(Pacific Avenue) Page 5 TABLE 2 Laboratory Analytical Results (July 19 and 20, 2001) B T E X MTBE TPH-G Reporting limits 03 03 03 06 10 005 Monitor Well I D Etg/L pg/L pg/L µg/L ltg/L mg/L 1707-MW 1-7/20/01 230 66 40 70 1,200 1 0 1707-MW2-7/19101 29,000 1,500 2,500 6,600 190 103 1707-MW3-7/20101 <0 3 <0 3 <0 3 <0 6 93 <005 1707-MW4-7/19/01 <0 3 <0 3 <0 3 <0 6 < 1 0 <0 05 1707-MW5-7/19/01 <0 3 <0 3 <0 3 <0 6 < 1 0 <0 05 1707-MW6-7/20/01 <0 3 <0 3 <0 3 <06 < 1 0 <0 05 1707-MW7-7/19101 <0 3 <0 3 <0 3 <06 < 1 0 <0 05 1707-MW8-7/19/01 <0 3 <0 3 <0 3 <0 6 < 1 0 <0 05 Unit Conversions Analytical µg/l-parts per billion(ppb) B,T,E X=benzene,toluene,ethyl benzene,and total xylenes mg/L parts per million(ppm) TPH-G=total petroleum hydrocarbons,quantified as gasoline MT13E=Methyl tertiary-Butyl Ether 4 3 SOIL VAPOR EXTRACTION SYSTEM Operation of the SVE system was initiated on March 15, 1999 Condor monitored the system on a monthly basis Volatile organic vapor screening was performed with a photo-ionization detector (PID) at ' the system inlet and exhaust to evaluate the destruction efficiency of the thermal oxidation unit Vacuum measurements to inches of water were recorded from ports installed at the SVE wells to evaluate the radius of Influence Various other system parameters were monitored to maintain optimum performance ' of the SVE system (see SVE System Log, Appendix D) The hydrocarbon destruction efficiency for the year 2000 ranged from 96 66% to 100% The average hydrocarbon destruction rate for 2000 was 98 8% The system was turned off from January 18, 2001 until January 24, 2001 for repairs The efficiency rate upon restarting the system was 69% The system was restarted for efficiency monitoring on January 25 and February 6, 2001 Destruction efficiency was 80 3% and 79 6% on those respective days Because of the low efficiency upon restarting the system, ' additional monitoring of and adjustments to the system were conducted in an attempt to achieve proper efficiency Because the 95% efficiency required by the air permit could not be achieved, the system was removed from service on January 24, 2001 pending further evaluation On June 25 2001 a Condor representative was on site to determine the operational status of the SVE P system and found that the system would clot start The blower motor was inoperative and had to be t rewired On July 10 a Condor representative started the SVE system After one hour the system was operating within normal parameters with a 95% destruction efficiency The system remained in operation until July 27 During that time destruction efficiencies ranged from 88 4% to 100% On July 27 Condor 1 conducted monitoring at the site and found the destruction efficiency had dropped to between 80% and 90% The air permit for the system requires a minimum 95% destruction efficiency, so the system was Ntliw �� CONDOR