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Table 8 <br /> Dual Phase Extraction System-Groundwater Analytical Data <br /> Parcel 2A-L&M OU <br /> 666 West Weber Avenue, Stockton, CA <br /> HEM Ethyl- Total <br /> TRPH w/SGT TPHg TPHd TPHo Benzene Toluene benzene Xylenes MtBE DIPE ETBE TAME TBA <br /> Date Sampled Sample ID Notes pH (mg/L) (mg/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) <br /> Groundwater treated using oil/water separator,a 3,000-Ib organoclay vessel,and two 2,000-Ib GAC vessels. <br /> 3/18/2004 GW-INF 1 5,100 260,000 98,000 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <20 <br /> 3/18/2004 GW-MID-1 130 4,400 410 <0.50 2.5 <0.50 2.9 1.1 <0.50 <0.50 <0.50 11 <br /> 3/18/2004 GW-MID-2 <50 61 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 3/18/2004 EFF 8.76 <1.0 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 3/22/2004 1 System started for 24-hour collection of vapor PAH samples. <br /> 3/23/2004 System shut down following completion of vapor PAH sample collection. PAH results outside of ATC limits;alternate ATC needed to operate. <br /> 4/4/2004 Approximately 5,840 gallons of groundwater stored in holding tank discharged to sanitary sewer. <br /> 8/2/2004 ATC Number N-4878-1-2 issued 7/20/2004.System restarted. <br /> 8/3/2004 GW-INF 2 29,000 720,000 240,000 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <25 <br /> 8/3/2004 GW-MID-1 98 360 <100 <0.50 0.82 <0.50 1.7 <0.50 <0.50 <0.50 <0.50 9.8 <br /> 8/3/2004 GW-MID-2 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 8/3/2004 EFF 7.64 <1.0 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 10/28-29/2004 Approximately 18,000 gallons of water from the decontamination of removed pipelines treated with the organoclay and GAC vessels.No wastewater discharge. <br /> 11/1/2004 GW-INF 33,000 2,900,000 1,100,000 <20 <20 <20 <20 <20 <20 <20 <20 <200 <br /> 11/1/2004 GW-MID-1 16,000 1,300 300 110 1,400 9.1 450 <0.50 <0.50 <0.50 <0.50 10 <br /> 11/1/2004 GW-MID-2 <50 57 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 11/1/2004 3W-MID-3/TANI 3 <50 440 540 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 12/9/2004 Carbon changeout in two 2,000-Ib GAC vessels,treatment system augmented with three 300-Ib EC300 vessels to adsorb TBA. <br /> 12/13/2004 System started for 24-hour collection of vapor PAH samples. <br /> 12/14/2004 GW-INF 3,4 22,000 1,100,000 330,000 <2.0 7.3 <2.0 11 7.0 <2.0 <2.0 <2.0 10 <br /> 12/14/2004 GW-MID-1 6 3,000 1,200 190 44 990 6.0 360 <2.5 <2.5 <2.5 <2.5 <15 <br /> 12/14/2004 GW-MID-2 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 12/14/2004 GW-MID-3 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 12/14/2004 GW-MID-4 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 12/14/2004 GW-MID-5 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 12/14/2004 GW-EFF 7.97 <1.0 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 12/16/2004 System restarted. <br /> 1/13/2005 GW-INF 5,6 -- -- 26,000 760,000 340,000 <0.50 <0.50 <0.50 1.9 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 1/13/2005 GW-MID-1 6 3,200 30,000 11,000 0.56 9.0 0.53 77 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 1/13/2005 GW-MID-2 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 1/13/2005 GW-MID-3 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 1/13/2005 GW-MID-4 -- -- -- -- -- -- -- -- -- -- -- <5.0 <br /> 1/13/2005 GW-MID-5 -- -- -- -- -- -- -- -- -- -- -- <5.0 <br /> 1/13/2005 GW-EFF 7.92 <1.0 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 2/8/2005 GW-INF -- -- 15,000 400,000 240,000 <5.0 <5.0 <5.0 9.3 <5.0 <5.0 <5.0 <5.0 <25 <br /> 2/8/2005 GW-MID-1 2,900 38,000 19,000 <0.50 1.3 <0.50 49 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 2/8/2005 GW-MID-2 <50 93 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 2/8/2005 GW-MID-3 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> 2/8/2005 GW-MID-4 -- -- -- -- -- -- -- -- -- -- -- <5.0 <br /> 2/8/2005 GW-MID-5 -- -- -- -- -- -- -- -- -- -- -- <5.0 <br /> 2/8/2005 GW-EFF 7.6 <1.0 <50 <50 <100 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <br /> I:\Tidewater\TW Stockton(P2A)\Engineering\O&M\Tables\O&M Tables 2012\4Q12\Parcel 2A OM Tables 4Q12.xlsx Page 1 of 16 <br />