|
Table 2.Historical Groundwater Monitoring and Analytical Data
<br /> ARCO Station No.4932,16 East Harding Way,Stockton,CA
<br /> TOC Product Water Level Concentrations In pg/L
<br /> Well ID and Elevation DTW Thickness Elevation GRO/ Ethyl- Total
<br /> Date Monitored (feet( (feet) (feet) (feet(
<br /> TP
<br /> Benzene Toluene Benzene Xylenes MTBE Ethanol DIPE ETRE TAME TBA 1,2-DCA EDB Footnote
<br /> MW-3 Cont.
<br /> 4/20/2009 11.08 28.90 0.00 -17.82 -- - - -- -- -
<br /> 4/22/2009 _ _ _ <50 <0.50 <0.50 <0.50 <0.50 <0.50 <300 <050 <0.50 <0.50 <10 1.4 <050
<br /> 1/5/2011 28.22 0.00 -17.14 - - -- -- - -- - -- - - --
<br /> 1/7/2011 - - -- <50 <0.50 <050 <0.50 <0.50 <0.50 <300 <O50 <0.50 <0.50 <10 0.94 <0.50
<br /> 2/25/2013 24.69 0.00 -13.61 _ _ _ -- _ __ _ -- _ _ _ -_ __ •
<br /> 3/1/2013 - -- - <50 <0.50 <0.50 <050 <1.0 <0.50 - <0.50 <0.50 1 <0.50 <10 1 1.8 1 <050
<br /> MW-4
<br /> 9/5/2000 11.98 26.63 0.00 -14.65 170,000 11,000 44,000 5,200 25,000 710,000 - <2.0 <2.0 9.0 <200 4.0 <2.0 a
<br /> 11/2/2000 27.32 0.00 -15.34 180,000 9,400 43,000 5,300 27,000 350,000 - <400 <400 <400 10, <400 <4D0
<br /> 3/5/2001 26.63 0.00 -14.65 170,000 11,000 45,000 5,000 27,000 470,000 -- <20.0 <20.0 540 12,000 <20.0 <20.0
<br /> 5/8/2001 26.26 0.00 -14.28 150,000 9,700 45,000 5,300 27,000 500,0DO - <5.000 6.000 6,000 500,00 <5,000 <5,000
<br /> 7/20/2001 27.41 0.02 -15.42 -- - -- --
<br /> 10/22/2001 29.92 0.46 -17.60 - - - -- - - - - - -- - -
<br /> 1/15/2002 29.91 0.00 -17.93 140,000 7,900 39,000 6,000 29,000 90,000 -- <2,500 <2,500 <2,500 25, <2500 <2,500
<br /> 4/11/2002 27.10 0.00 -15.12 140,000 9,700 33,DDO 8,100 37,000 160,000 - <1,000 <1,000 <1,000 10, <1,000 <S,ODO
<br /> 7/12/2002 29.21 0.00 -17.23 210,000 7,100 31,000 10,000 41,000 150,000 -- <2,500 <2,500 <2,500 25, - -
<br /> 11/20/2002 31.64 0.00 -19.66 140,000 6,300 250,000 4,000 19,000 67,000 -- 60 60 64 <2,000 350 60
<br /> _ __ _ _ _ -- __ _ _ -. _ INA
<br /> 1/30/2003 - -- -- -
<br /> __ _ _ _ -- _ INA
<br /> 4/28/2003 - -- -- -- - - - --
<br /> 7/29/2003 31.04 0.00 -19.06 <100 8,900 12,000 3,800 12,000 12,000 <50,000 <250 <250 <250 90, 4,400 <250
<br /> 10/17/2003 32.95 0.00 -20.97 21,000 1,500 2,700 810 4,100 7,200 <25,000 <250 <250 <250 <5,000 170 <120
<br /> 1/12/2004 - -- - 28,000 220 550 110 460 33 6,000 60 60 60 <1,000 <25 <25 DRY
<br /> 4/26/2004 30.49 0.00 -18.51 29,000 2,200 5,200 690 4,200 350 <5,000 <25 <25 <25 <3,000 78 <25
<br /> 7/13/2004 - - - 3,100 19 58 44 570 250 <I,000 6.0 6.0 <5.0 3,000 6.0 6.0 DRY
<br /> 10/27/2004 34.32 0.00 -22.34 2,300 13 82 31 370 11 600 <2.5 <25 <25 3,700 <2.5 <2.5
<br /> 1/13/2005 -- - - 500 1.2 6.8 2.0 27 10 <100 <1.0 <1.0 <1.0 980 <0.50 <0.50 DRY
<br /> 4/13/2005 30.90 0.00 -18.92 12,000 940 2,900 370 1,900 120 6,000 <25 <25 <25 <1,000 <25 <25
<br /> 7/11/2005 32.64 0.00 -20.66 1,100 16 94 10 95 15 <100 <0.50 <0.50 <0.50 330 <050 <0.50
<br /> 10/5/2005 31.38 0.00 -19.40 11,000 500 2,000 300 1,700 70 <2,500 <12 <12 <12 600 <25 <12 c
<br /> 1/12/2006 31.23 0.00 -19.25 4,400 110 390 210 850 130 <1,500 5.8 <2.5 <2.5 <100 18 <2.5 b
<br /> Page 23 of 38
<br />
|