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(In order to show best estimate, recovery calculations assume one-half of the detection limit when the compound is reported as less than the detection limit.)
<br />Period Period Period Period Period Period Period
<br />Volume Net Cumulative Net Cumulative Net Cumulative Net Cumulative Net Cumulative Net Cumulative
<br />Date Extracted TPHg TPHd TPHo Benzene MtBE TBA Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed
<br />Sampled (gallons) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs)
<br />Table 12
<br />666 West Weber Avenue, Stockton, CA
<br />Dual Phase Extraction System - Groundwater Mass Recovery and Adsorption
<br />Parcel 2A - L&M OU
<br />TBA RecoverySystem Data Influent Concentrations TPHg Recovery TPHd Recovery TPHo Recovery Benzene Recovery MTBE Recovery
<br />11/11/2008 197,800 1,400 45,000 28,000 <0.50 <0.50 <5.0 1.84 130.18 457.06 7,594.32 228.94 3,931.39 0.000 0.050 0.000 0.017 0.004 0.417
<br />12/17/2008 156,800 3,600 170,000 85,000 <0.50 <0.50 6.0 3.26 133.45 140.36 7,734.68 73.77 4,005.16 0.000 0.050 0.000 0.018 0.006 0.422
<br />1/14/2009 122,990 4,400 99,000 34,000 <0.50 <0.50 <5.0 4.10 137.55 137.75 7,872.42 60.94 4,066.10 0.000 0.051 0.000 0.018 0.004 0.427
<br />2/11/2009 200,450 64 23,000 18,000 <0.50 <0.50 <5.0 3.73 141.27 101.82 7,974.24 43.40 4,109.49 0.000 0.051 0.000 0.018 0.004 0.431
<br />3/11/2009 107,160 1,500 27,000 18,000 19 <0.50 12 0.70 141.97 22.31 7,996.55 16.06 4,125.55 0.009 0.060 0.000 0.019 0.006 0.437
<br />4/16/2009 104,370 87 24,000 22,000 <0.50 <0.50 6.0 0.69 142.66 22.16 8,018.71 17.38 4,142.94 0.008 0.068 0.000 0.019 0.008 0.445
<br />5/8/2009 69,050 1,000 41,000 18,000 <0.50 <0.50 5.2 0.31 142.97 18.69 8,037.40 11.50 4,154.44 0.000 0.068 0.000 0.019 0.003 0.448
<br />6/8/2009 71,730 1,200 90,000 35,000 <0.50 <0.50 <5.0 0.66 143.63 39.12 8,076.52 15.83 4,170.26 0.000 0.068 0.000 0.019 0.002 0.451
<br />7/9/2009 91,030 930 81,000 33,000 <0.50 <0.50 <5.0 0.81 144.43 64.81 8,141.33 25.77 4,196.04 0.000 0.068 0.000 0.019 0.002 0.453
<br />8/11/2009 74,910 870 82,000 56,000 <0.50 <0.50 <5.0 0.56 145.00 50.84 8,192.17 27.76 4,223.79 0.000 0.069 0.000 0.019 0.002 0.454
<br />9/8/2009 42,980 510 47,000 34,000 <0.50 <0.50 <5.0 0.25 145.24 23.08 8,215.25 16.11 4,239.90 0.000 0.069 0.000 0.020 0.001 0.455
<br />10/15/2009 117,510 760 160,000 81,000 <0.50 <0.50 <5.0 0.62 145.86 101.28 8,316.53 56.26 4,296.16 0.000 0.069 0.000 0.020 0.002 0.458
<br />11/10/2009 59,490 420 220,000 130,000 <0.50 <0.50 9.2 0.29 146.16 94.12 8,410.65 52.26 4,348.43 0.000 0.069 0.000 0.020 0.003 0.460
<br />12/9/2009 49,860 110 21,000 14,000 <0.50 <0.50 5.4 0.11 146.27 50.03 8,460.68 29.89 4,378.32 0.000 0.069 0.000 0.020 0.003 0.463
<br />1/12/2010 77,700 400 140,000 110,000 <0.50 <0.50 <5.0 0.16 146.43 52.08 8,512.76 40.11 4,418.43 0.000 0.069 0.000 0.020 0.002 0.465
<br />2/4/2010 35,440 240 42,000 29,000 <0.50 <0.50 <5.0 0.09 146.53 26.85 8,539.62 20.51 4,438.94 0.000 0.069 0.000 0.020 0.001 0.466
<br />3/2/2010 142,045 480 170,000 130,000 <0.50 <0.50 6.0 0.43 146.95 125.38 8,664.99 94.03 4,532.98 0.000 0.070 0.000 0.021 0.005 0.471
<br />4/7/2010 109,705 230 56,000 42,000 <0.50 <0.50 5.3 0.32 147.28 103.23 8,768.22 78.56 4,611.54 0.000 0.070 0.000 0.021 0.005 0.476
<br />5/12/2010 74,720 3,200 150,000 67,000 <0.50 <0.50 8.9 1.07 148.34 64.09 8,832.31 33.91 4,645.45 0.000 0.070 0.000 0.021 0.004 0.480
<br />6/10/2010 57,550 170 800,000 600,000 <0.50 <0.50 <5.0 0.81 149.15 227.63 9,059.94 159.82 4,805.27 0.000 0.070 0.000 0.021 0.003 0.483
<br />7/12/2010 90,990 750 92,000 78,000 <0.50 <0.50 <5.0 0.35 149.50 337.92 9,397.86 256.85 5,062.12 0.000 0.070 0.000 0.021 0.002 0.485
<br />8/4/2010 52,300 520 5,800 2,800 <0.50 <0.50 <5.0 0.28 149.78 21.30 9,419.15 17.59 5,079.71 0.000 0.071 0.000 0.021 0.001 0.486
<br />10/7/2010 82,780 740 72,000 32,000 <0.50 <0.50 <5.0 0.43 150.21 26.81 9,445.97 11.99 5,091.71 0.000 0.071 0.000 0.022 0.002 0.488
<br />11/16/2010 100,160 50 5,000 2,800 <0.50 <0.50 5.2 0.32 150.53 32.11 9,478.08 14.51 5,106.22 0.000 0.071 0.000 0.022 0.003 0.491
<br />12/14/2010 84,920 84 5,600 2,900 <0.50 <0.50 <5.0 0.04 150.57 3.75 9,481.83 2.02 5,108.24 0.000 0.071 0.000 0.022 0.003 0.494
<br />1/11/2011 88,560 680 16,000 8,800 <0.50 <0.50 <5.0 0.28 150.85 7.96 9,489.79 4.31 5,112.55 0.000 0.071 0.000 0.022 0.002 0.496
<br />2/10/2011 87,440 130 14,000 9,100 <0.50 <0.50 <5.0 0.29 151.14 10.92 9,500.71 6.52 5,119.07 0.000 0.071 0.000 0.022 0.002 0.498
<br />3/17/2011 139,270 340 7,500 3,700 <0.50 <0.50 7.0 0.27 151.42 12.47 9,513.18 7.42 5,126.49 0.000 0.072 0.000 0.023 0.006 0.503
<br />4/8/2011 34,107 320 16,000 5,700 <0.50 <0.50 5.2 0.09 151.51 3.34 9,516.52 1.33 5,127.82 0.000 0.072 0.000 0.023 0.002 0.505
<br />5/13/2011 94,983 <50 2,600 1,100 <0.50 <0.50 <5.0 0.14 151.65 7.36 9,523.87 2.69 5,130.51 0.000 0.072 0.000 0.023 0.003 0.508
<br />6/16/2011 140,358 <50 820 250 <0.50 <0.50 <5.0 0.03 151.68 2.00 9,525.87 0.79 5,131.30 0.000 0.072 0.000 0.023 0.003 0.511
<br />7/13/2011 100,457 <50 1,300 510 <0.50 <0.50 6.2 0.02 151.70 0.89 9,526.76 0.32 5,131.62 0.000 0.072 0.000 0.023 0.004 0.514
<br />8/11/2011 105,335 <50 3,200 1,900 <0.50 <0.50 <5.0 0.02 151.72 1.97 9,528.73 1.06 5,132.68 0.000 0.073 0.000 0.024 0.004 0.518
<br />9/15/2011 133,760 <50 3,700 2,700 <0.50 <0.50 <5.0 0.03 151.75 3.84 9,532.57 2.56 5,135.24 0.000 0.073 0.000 0.024 0.003 0.521
<br />10/27/2011 53,063 150 4,600 1,700 0.73 <0.50 6.8 0.04 151.79 1.83 9,534.41 0.97 5,136.21 0.000 0.073 0.000 0.024 0.002 0.523
<br />11/15/2011 3,897 -- -- -- -------- 151.79 -- 9,534.41 -- 5,136.21 -- 0.073 -- 0.024 -- 0.523
<br />12/15/2011 1,404 <50 1,100 550 <0.50 <0.50 <5.0 0.00 151.79 0.05 9,534.46 0.02 5,136.23 0.000 0.073 0.000 0.024 0.000 0.523
<br />1/19/2012 56 55 710 100 <0.50 <0.50 <5.0 0.000 151.79 0.01 9,534.47 0.00 5,136.24 0.000 0.073 0.000 0.024 0.000 0.523
<br />2/28/2012 2,726 240 540 240 <0.50 <0.50 <5.0 0.003 151.79 0.01 9,534.48 0.00 5,136.24 0.000 0.073 0.000 0.024 0.000 0.523
<br />3/16/2012 930 <50 520 250 <0.50 <0.50 <5.0 0.004 151.79 0.02 9,534.50 0.01 5,136.25 0.000 0.073 0.000 0.024 0.000 0.523
<br />Current Reporting Period: December 15, 2011 through March 16, 2012 Cumulative Totals: March 18, 2004 through March 16, 2012
<br />Operational Hours 0.6 hours Number Days Operational Since Startup 1,564 days
<br />Extracted Ground Water 3,712 gal Cumulative Total Gallons Extracted 6,711,576 gal
<br />Average Flow Rate -- gpm Cumulative Average Flow Rate 2.98 gpm
<br />Pounds of TPHg Removed 0.01 lbs 0.3 lbs/day Cumulative Pounds of TPHg Removed 151.79 lbs 0.1 lbs/day
<br />Pounds of TPHd Removed 0.04 lbs 1.7 lbs/day Cumulative Pounds of TPHd Removed 9,534.50 lbs 6.1 lbs/day
<br />Pounds of TPHo Removed 0.02 lbs 0.6 lbs/day Cumulative Pounds of TPHo Removed 5,136.25 lbs 3.3 lbs/day
<br />Pounds of Benzene Removed 0.000 lbs 0.001 lbs/day Cumulative Pounds of Benzene Removed 0.073 lbs 0.000 lbs/day
<br />Pounds of MTBE Removed 0.000 lbs 0.001 lbs/day Cumulative Pounds of MTBE Removed 0.024 lbs 0.000 lbs/day
<br />Pounds of TBA Removed 0.000 lbs 0.007 lbs/day Cumulative Pounds of TBA Removed 0.523 lbs 0.000 lbs/day
<br />I:\Tidewater\TW Stockton (P2A)\Engineering\O&M\Tables\O&M Tables 2012\Parcel 2A OM Tables 1Q12.xlsx Page 2 of 3
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