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TABLES SUMMARY OF HISTORICAL GROUNDWATER GAUGING AND LABORATORY ANALYTICAL DATA Former Tosco Bulk Terminal No. 10013 3505 Navy Drive,Stockton,CA - -.!A pro.imate an .. TDC, ,Constructed Depth to Groundwater Well Elnation TOW Well Groundwater T �fenes " ?`lumber Sample bate _ Elevation ( g/j,) µ �.. (u_ ``1i+4l 5 _. ../.- DIPE('F/L) E ,'Tr fE' TBA Methanol Fthinol (feel a]fove Depth .'_(feet below (feet nbo�e * - JtE.) -CPS�C) h{Sf} (feet below 1 QC) i ISL) IOC) ;EFA Ivelt d 8015M o .,, EPA Method 8 ntw-I o6ns/ol 2.62 25 10.16 -7.54 ND<50 _ - MW_I 09/04/01 2.62 25 10.76 -8,14 - - - 2.500 ND<10 ND<10 11 280 ND<1000 MW-1 12/11/01 ND<50 ND<50 ND<0.50 0.5 ND<0.50 ND<0.50 1800 NDQOO ND<4000 2.62 25 _ 10.25 -7.63 _ _ ND000 NDQ00 ND<20000 NLK500 ND<3oo00 MW-1 02/21/02 262 25 9.13 -6.51 - - 2300 ND<I00 ND<I00 ND<100 ND<1000 ND<500 ND<25000 MW-1 05/22/02 -- ND<50 ND<500 NDGS-0 ND<5.0 NDG5.0 ND<5.0 1600 7.17 25 0-6 -2.63 ND<5O _ _ ND<5.0 ND<5.0 6.1 210 ND<3000 ND<50 MW-1 08/21/02 7.17 25 10.63 -3.46 - - 2000 ND<10 ND<10 12 ND<Io0 180(o) NDQ500 MW-t 11/14/02 8.09 ND!-48 ND<5000 ND<50 ND<50 ND<50 ND60 25 9 37 2.46 _ 2100 NE ND000 NDQ00 ND<I0000 ND<I00 ND<50000 MW-1 0?J20lO3 8-� 25 9.37 - - - - 1800 ND<42 NDc4.2 4.9 62 ND<1000 ND<830 MW-1 -1.28 100(r - ND<50 NDQ.O ND<2.0 ND-:2.0 NDQ.o 620 05/30/03 8.09 25 10.03 -1.94 NDQ.O ND0.0 ND<20 3200 ND<1000 ND<400 MW-1 08/13/03 8.09 25 10.73 _2,64 0 -- - - -- - 1.8 ND<0.50 NDm.50 ND<0.50 1500 ND<1000 ND<I00 12/22/03 8.09 130 r ND<50 NDm,50 0.7 MW-1 25 10.74 -2.65 Nb<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 1300 ND<1000 ND<1000 Mµ'1 02/10104 8'09 25 ND�,50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 NDm,50 ND<0.50 190 ND 9..2 -1.55 r ND<50 "'150 ND<0.50 Mµ'-1 0520/04 8.09 ZS 1022 -213 ND<0.50 ND<1.0 0.74 NI3<I.0 0.l u ND<0.50 90 MW-1 08/16/04 8.09 25 (1.93 3.84 - - - _ - _ ND<50 ND<5.0 MW'1 1129N4 8-09 64 - 25 10.52 -2.43 - ND<0.50 Mµ'-1 02!17/05 8.09 25 - -- - - _ - --- 410 ND<50 ND<5 0 8.74 -0.65 ND<50 ND<50 NDm*m - MW_l 05/12/05 8-09 25 8.90 M-3.14 -iVD�.50 NDW.50 NDc1 0 0.7 _- -- - -- MW-1 08/30/05 8.09 - -` - - -- - 170 ND<500 ND<50 25 10.60 37 ND<50 - MWA 11/30105 8.09 25 - - 0.79 --- - --- - - - 119 520 NDG500 ND<50 Mµ'-1 02/0?l06 8.09 25 8.95 - -- - - --- _ MW-105/30/06 8.09 ND<50 75 NDm.50 ND<0.50 . NIXI.O _ -25 8.56 _ 0.99 ND<I.0 ND<0.50 ND<0.50 59 ND<I0000 ND<100 Mµ1-1 08/3(/06 8.09 25 10.00 - - MW-1 11/16/06 8.09 ND<50 ND<50 - - - - -- -- - --- 25 10.21 -2.12 -- - 1.5 490 ND<I0000 ND<250 MW-1 03/26/07 8.09 25 10.34 -225 - - - - - - - -- -- Mµ'-1 0529/07 8.09 ND<50 ND<50 ND<0.50 ND<0.50 NDcOSO ND<1.0 --- --- -- - 25 10.35 -2.26 _ _ _ ND<I.0 200 ND<80 ND<250 -, - 08/37/07 8.09 25 16.81 -2.72 ND<50. ND<50 _ - -- -- --- __ 11/30/07 8.09 25 10.64 -2.55 - - 0.63 --- - -- - -- MW-1 03/19/08 8.09 - - - - _ '-- -- 230 <I0000 ND<250 25 9.93 -1.84 ND<50 ND<50 - _ _ Mw-1 05/21!08 8.o9 25 ND<0.50 , NDm.50 NDZ0 ND<!.0 0.92 ND<0.50 ND<0.50 ND<0.50 ND<lo ND<IO ND<250 10.11 -2.02 MW-1 08/28/08 8.09 25 10.45 -2.36 -- - - - - - MW-1 11/06/08 8.09 ND<50 ND<SO - - - - -- - - 10,39 -2.30 _ 250 ND<10 ND<250 MW-1 02/09/09 8.09 25 9.91 -L82 - - --- Mw-1 05/07/09 8.09 ND<50 ND<50 ND<0.50 ND�.50 ND<0-50 NDc1.0 - - - 25 9,71 -1.62 0.67 ND<IO ND<I00 ND<250 Mµ'-1 08!31/09 8.00 25 10.39 -239 - __ - - Mµ'-1 ---11/12/09 8.00 ND<50 NDc50,. 25 IO.IO -2,10 - __ --- - - ND<0,50 ___ --- Mµ'-1 02!03/10 8.00 - --- _ --- 60 25 9.28 -128 !20 ND<50 - Mw t05/1 8.00 25 ND<0.50 ND<250 NDcO-50 ND<I.0 0.52 --__- -- - - --- 9.17 1.1� ND<10 ND<10o ND<250 Mµ'-1 8.00 25 10.21 -221 - - M1V-I 6.00 25 54 ND<50 _ _ - -- -- -- - - --- MW-1 10.00 -2.00 - - - - ND<0.50 -- 44 NIKI00 ND<250 8 00 25 8.87 --- --- - -- _ \IW-1 800 25 889 0.89 <50 <50 <0.50 - --- <IO <100 Page 4 of 33