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TABLE3 SUMMARY OF HISTORICAL GROUNDWATER GAUGING AND LABORATORY ANALYTICAL DAIA Former Tosco Bulk Terminal No.10013 3505 Navy Drive,Stockton,CA Approximate TOC Constructed Depth to Groundwater .TPHD Benzene. Toluene, Ethi lbenzene ,T60a Cylehes MTBE (p�l � EI8$ T TBA' Methanol Ethanol TPfi G(p8 L) UIYE L ( Welt Elevafioo Total Well Groundwater Elevation (µg L} �pBJL) (40 (400 (µpJL} (31 82) Q 8�) (p8�) (Ei82� tPB2j G18 ) mple Datb NumberSa . - (feet above ,Depth (feet below =_(feet above . .. •..' ,.-- MSL) :(feet helacv TOC) MSL) - TOC) - EPA Method 8015M EPA Method 82608 MW-6 05/21/08. .965 ... 15 1131 -166 --- -- --- --- --- --- --- -- --- --- --- --- MW-6 08/28/08 9.65 16 11.59 -1.94 -- - -- -- -- -- --- --- --- -- --' --- --- NfW-6 11/06/08 965 16 11, -1.87 --- --- -- - -- --- --- --- --- -- --- --- --- MW-6 02/09/09 9.65 16 11.08 -L43 --- --- --- -- --- --- --- '- --- -- --- --- --- MW-6 05/07/09 9.65 16 10.67 -1.02 --- --- -- --- --- --- --- --- - --- --" --- --- _ --- -- --- --- MW-6 11/12/09 9.67 16 --- --- --- -- --- -- --- --- -- - -- MW-6 02/03/10 9.67 16 10.47 -0.80 --- --- --- --- --- --- --- --- --- -- "-- MW-6 05/06/10 9.67 16 10.32 -0.65 --- -- -- -- --- --- -- --- -- -- --- --- --- MW-6 08/30/10 967 16 11.36 -1.69 --- --- - -- -- -- -- --- -- --- --- --- -- MW-6 12/03/10 967 16 11.19 -1.52 -- --- --- - --- -- '-- -- -- -- '-- --- -'- MW-6 02/18/11 967 16 10.32 -0.65 --- --- --- --- --- --- -- --- --- - --- --- --- MW-6 05/11/11 967 16 10.31 -0.64 -- --- -- -- -- -'- - -- -- --- --- --- MW-6 09/07/11 9.67 16 11.37 -170 --- --- - -- --- -- -- --- --- -- -- --- -- MW-6 12/06/11 9.67 16 10.93 -1.26 --- --- - - --- --- --- --- --- --' -- --' --- MW-6 03/05/12 9.67 16 10.95 -1.28 --- --- -- -- -- --- -- '- --- --- --- --- --' MW-7 03/01/93 3.04 --- 9.26 -6.22 ND<50 ND150 ND<0.50 ND<0.50 ND-e0.50 ND<0.50 --- --- -- --- -- -- --- MW-7 06/04/93 3.04 --- 9.94 -6.90 ND<50 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 --- --- -- --- --- -- --- NfW-7 09/28/93 304 --- 11.52 -8.48 ND<50 ND<50 ND<.50 ND<0.50 ND<0.50 ND<0.50 -- -- --- --- --- --- --- MW-7 12/02/93 3.04 --- 11.62 -8.58 ND<50 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 -- -- -- -- --- --- --- MW-7 03/04/94 3.04 --- 10.34 -7 30 ND<50 ND<50 ND<0.50 ND<0.50 I ND<0.50 ND<0.50 -- -- -- --- --- --- MW-7 06/03/94 3.04 -- 10.91 -7.87 ND<50 ND<50 ND�.50 ND<0.50 ND<0.50 ND<0 50 -- -- -- -- --- --- --- MW-7 09/28/94 3.04 --- 1 L48 -8.44 ND<50 ND<50 ND@50 ND<0.50 ND<0.50 ND<0.50 --- -- -- -- --- --- --- MW-7 12/02/94 3.04 --- 11.07 -8.03 ND<50 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 --- -- --- --- --- I --- --- MW-7 03/31/95 3.04 --- 8.30 -5.26 63 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 MW-7 06/02/95 3.04 --- 9.80 -6.76 68 ND<50 ND<O.50 ND<0.50 ND<0.50 ND<0.50 --- --- -- --- --- --- --- MW-7 11/01/95 304 --- 11.60 -8.56 ND<50 ND150 ND .50 <0 50 ND<0.50 ND<10 - ND<5.0 -- -- -- --- --- --- MW-7 02/14/96 3.04 --- 8.88 -5.84 60 ND<50 ND<D.50 ND t,4W-7 05/14/96 3.04 --- 9.38 -6.34 ND<50 60 ND<0.50 ND MW-7 09/10/96 3.04 -- 10.03 -6.99 ND<50 ND<50 ND<0.50 ND<1.0 ND<L0 ND<I.0 ND<10 -- --- -- --- --- --- MW-7 11/21/96 3.04 --- 10.71 -7.67 ND<100 ND<50 ND<0.50 ND<I.0 ND<1.0 ND<I.0 ND<10 --- -- --- --- --- MW-7 12/10/96 Well Destroyed MW-8 - 03/01/93 311 25 9.55 -6.44 ND<50 ND<50 ND<0.50 ND�*.50 ND<0.50 ND<O 50 -- - -- -- --- -- --- MW-8 06/04/93 3.11 25 10.30 -7.19 200 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 --- -- -- --- --- --- --- MW-8 09/28/93 3.11 25 11.90 -8.79 1,100 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 -- --- -- --- -- --- --- MW-8 12/02/93 3.11 25 11.91 -8.80 810 ND<50 ND<0.50 ND<0.50 ND<0.50 N13<0.50 --- - - - --- --- --- N1W-8 03/04/94 3.11 25 10.67 -T56 230 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 --- --- - --- --- --- --- MW-8 06/03/94 3.11 25 1 11.20 1 -8.09 1 110 ND<50 ND<D.50 ND<0 50 ND<0.50 ND<0.50 --- --- --- --- --- --- --- MW-8 09/28/94 1 3.11 25 11.88 -8.77 300 ND<50 ND<D.50 ND 50 ND<0.50 ND<050 --- --- -- --- --- --- -- Page 15 of 33 ATC Project No 075 751 18 0899