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Date Sampled Sample ID Notes pH TRPH (mg/L) HEM w/SGT (mg/L) TPHg (µg/L) TPHd (µg/L) TPHo (µg/L) Benzene (µg/L) Toluene (µg/L) Ethyl- benzene (µg/L) Total Xylenes (µg/L) MtBE (µg/L) DIPE (µg/L) ETBE (µg/L) TAME (µg/L) TBA (µg/L) 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 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 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 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 3/22/2004 3/23/2004 4/4/2004 8/2/2004 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 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 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 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 10/28-29/2004 11/1/2004 GW-INF -- -- --33,000 2,900,000 #######<20 <20 <20 <20 <20 <20 <20 <20 <200 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 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 11/1/2004 GW-MID-3/TANK 3 -- -- -- <50 440 540 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 12/9/2004 12/13/2004 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 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 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 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 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 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 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 12/16/2004 System restarted. 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 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 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 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 1/13/2005 GW-MID-4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- <5.0 1/13/2005 GW-MID-5 -- -- -- -- -- -- -- -- -- -- -- -- -- -- <5.0 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 Table 11 Groundwater treated using oil/water separator, a 3,000-lb organoclay vessel, and two 2,000-lb GAC vessels. System started for 24-hour collection of vapor PAH samples. System shut down following completion of vapor PAH sample collection. PAH results outside of ATC limits; alternate ATC needed to operate. Dual Phase Extraction System - Groundwater Analytical Data Parcel 2A - L&M OU 666 West Weber Avenue, Stockton, CA ATC Number N-4878-1-2 issued 7/20/2004. System restarted. Approximately 18,000 gallons of water from the decontamination of removed pipelines treated with the organoclay and GAC vessels. No wastewater discharge. Carbon changeout in two 2,000-lb GAC vessels, treatment system augmented with three 300-lb EC300 vessels to adsorb TBA. System started for 24-hour collection of vapor PAH samples. Approximately 5,840 gallons of groundwater stored in holding tank discharged to sanitary sewer. I:\Tidewater\TW Stockton (P2A)\Engineering\O&M\Tables\O&M Tables 2012\Parcel 2A OM Tables 1Q12.xlsx Page 1 of 18