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Canepa's Car Wash
<br /> 6230 Pacific Avenue,Stockton,CA
<br /> Fourth Quarter Groundwater Monitoring Report,October 2005
<br /> Page 5 of 9
<br /> . Table 3—Groundwater Sample Laboratory Analytical Results (October 13,2005)
<br /> Constituent Benzene Toluene Ethyl Total TPH-G MTBE
<br /> Other Gasoline
<br /> Benzene Xylenes
<br /> Oxygenates/Additives
<br /> MCL 1 pg/L 150 pg/L 700 pg/L 1,750 Pg/l_ 13µg/L
<br /> Analytical Method—* 8260B 8260B 8260B 8260B 8015m 8260B 8260B
<br /> Reporting Limrts—� 0 5 pg/L 0 5 pg/L 0 5 pg/L 1 0 pg/L 005 05 0 5—20
<br /> Sample 1 D mg/L Pg/L pg/L
<br /> MW-1 6,430 1,180 <50 2,692 208 9,890 4 8(ED13)
<br /> MW-2 11,800 544 1,560 3,206 38 2 <1 0 < 1 0-<40
<br /> MW-3 <1 0 <1 0 <1 0 <3 0 00557 4,290 54 5(1,2-DCA)
<br /> MW-4 <0 5 <0 5 <0 5 <15 <0 05 <05 <0 5-<20
<br /> MW-5 NS NS NS NS NS NS NS
<br /> MW-6 NS NS NS NS NS NS NS
<br /> MW-7 NS NS NS NS NS NS NS
<br /> MW-9 <05 <0 5 <0 5 <1 5 <0 05 <05 <0 5-<20
<br /> MW-10 NS NS NS NS NS NS NS
<br /> MW-11 <05 <05 <05 <15 0328 281 <05-<20
<br /> I MW-12D <0 5 <0 5 <0 5 <1 5 <0 05 <0 5 <0 5 -<20
<br /> SVE-4 72,700 64,400 3,510 15,070 275 295,000 <500-<20,000
<br /> Bold analytical data exceed California MCL(Maximum Contaminant Level),
<br /> • *=The sample chromatogram does not match the standard gasoline chromatogram
<br /> Units Analytical
<br /> mg/L=milligrams per liter=parts per million(ppm) B,T,E,X=benzene,toluene ethyl benzene,total xylenes
<br /> pg/L=micrograms per liter=parts per billion(ppb) TPH-G=total petroleum hydrocarbons quantified as gasoline
<br /> Gasoline oxygenates/additives= methyl tertiary-butyl ether(MTBE), ethanol,tertiary-butanol(TBA),di-isopropyl ether(DIPS), ethyl tertiary
<br /> butyl ether(ETBE),tertiary-amyl methyl ether(TAME),1,2-diehloroethane(1,2-DCA), 1,2-dibromoethane(1,2-EDB)
<br /> TREATMENT SYSTEM STATUS UPDATE
<br /> Installation of the pump and treat system and upgraded SVE system was completed in September 2004
<br /> The City of Stockton Municipal Utilities Distnct (MUD) authonzed the initiation of discharge of treated
<br /> groundwater on October 28, 2004 Groundwater extraction and treatment, with subsequent discharge to
<br /> the sanitary sewer,began November 1, 2004
<br /> The system was voluntarily shut down in February 2005 due to exceedance of the discharge Iimit for
<br /> MTBE set forth in the MUD groundwater discharge permit Corrective action was undertaken and the
<br /> equipment was restarted on April 6, 2005 The system retrained in normal operation during the months of
<br /> August, September, and October 2005 with periodic scheduled shutdowns by Condor technicians for
<br /> system maintenance Several unscheduled, automatic shutdowns by the system's built-in safety features
<br /> also occurred, generally related to blown fuses and high water levels in the storage tank
<br /> MASS REMOVAL AND DESTRUCTION CALCULATIONS
<br /> The system was operating for approximately 1,449 hours between July 29, 2005 and October 31, 2005, or
<br /> approximately 63% of the time The effects of the system auto-shutdowns and system maintenance
<br /> shutdowns referrcd to In the previous section are reflected in the mass removal and destruction
<br /> calculations Operational and efficiency data are included in Attachment D
<br /> n
<br /> �� CONDOR
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