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Canepa's Car Wash
<br /> 6230 Pacific Avenue,Stockton,CA
<br /> Fust Quarter Groundwater Monitoring Report,January 2006
<br /> Page 5 of 9 �
<br /> Table 3—Groundwater Sample Laboratoaf Analytical Results (January 27,2006)
<br /> Constituent Benzene Toluene Ethyl Total MTBE TPH-G
<br /> Other Gasoline
<br /> I Benzene Xylenes Oxygenates/Additives
<br /> MGL I pg/L 150 pg/L 700 Ag/L 1,750µg/l_ 13 pg/L
<br /> Analytical Method-+ 8260B 8260E 8260B 8260E 8260B 8015m 8260B
<br /> Reporting Limits-+ 0 5 4g/L 0 5µg/l 0 5µg/1.. 10µg/L 0 5µF 0 O5 mg/L 0 5—20µg./1.
<br /> Sample I D
<br /> MW-1 7,760 4,540 676 3,1.51 6,650 23 2 3 4(EDB)
<br /> MW-2 11,400 935 1,790 4,403 <1 0 363 <1 0-<40 0
<br /> MW-3 <1 0 <10 <1 0 <3 0 2,200 0 426 28.3 (1,2-DCA)
<br /> MW-4 <05 <05 <05 <15 <05 <005 <05-<200
<br /> MW-9 <0 5 <0 5 <0 5 <1 5 <05 <0 05 <0 5-<20 0
<br /> MW-11 21 <05 30 32 <05 0156 <05-<'100
<br /> MW-12D <05 <05 <05 <15 <05 <005 <05- 100
<br /> SV-4 27,200 j 20,400 j 2,300 j 8,520 j 177,000 174 - <500-<20,000
<br /> Bold analytical data exceed California MCL(Maximum Contaminant Level),
<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-ainyl methyl ether(TAME),1,2-dichlorocthane(1,2-DCA), 1,2-dibromoethane(1,2-EDB)
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<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 District (MUD) authorized the initiation of discharge of treated
<br /> I groundwater on October 28, 2004 Groundwater extraction and treatment, with subsequent discharge to
<br /> the sanitary sewer,began November 1, 2004
<br /> The system remained in normal operation during the months of November 2005 through January 2006
<br /> with periodic scheduled shutdowns by Condor technicians for system maintenance Several unscheduled,
<br /> automatic shutdowns by the system's built-in safety features also occurred, generally related to blown
<br /> fuses and high water levels in the storage tank Condor replaced the groundwater extraction pump in use
<br /> in monitoring well MW-1 in late December 2005
<br /> MASS REMOVAL AND DESTRUCTION CALCULATIONS
<br /> The system was operating for approximately 1,844 hours between October 31, 2005 and January 31,
<br /> 2006, or approximately 84% of the tune The effects of the system auto-shutdowns and system
<br /> I maintenance shutdowns referred to in the previous section are reflected in the mass removal and
<br /> destruction calculations Operational and efficiency data are included in Attachment D
<br /> Aqueous Phase Mass Remov al
<br /> The groundwater treatment system has removed petroleum hydrocarbons from 476,152 gallons of
<br /> groundwater during the first quarter of 2006 Groundwater treatment system samples and associated data
<br /> were collected to comply with the Self-Monitoring Sample Program of the MUD Groundwater Discharge
<br /> Permit, as well as to monitor the operational efficiency of the system and the consumption of carbon
<br /> • (Attachment D)
<br /> �,a CONDOR
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