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Table 2 HISTORICAL GROUNDWATER MONITORING DATA AND ANALYTICAL RESULTS January 2000 through August 2005 Former 76 Station 4409 Well ID Monitoring TPH-G TPPH 82606 Benzene Toluene Ethyl Total MTBE MTBE 1 2-DCA EDB T-Lead TAME 82603 TBA 82608 DIPS 82606 $260B ETBE nol -Lea DepthWatto Thickness LPH G alnd ElevationTOG DeVpth of Comments Date (reported as benzene Xylenes 80215 82609 Elevation GRO) -11% feet (feet) feet I feel feet (pgn A !I I n n n !I II !I n !I !I !I 11 I MW 12 10!28!04 63 — ND<0 50 ND<O 50 ND<O 50 ND<1 0 -- 5 2 13 ND<0 50 ND<0 006C NO-050 ND<5 0 ND<l 0 ND<O 50 ND<50 3445 0 23 81 1064 83 37 MW 12 01112!05 ND<50 — ND<0 50 ND<0 50 ND<0 50 ND<1 0 — 7 3 14 ND<O 50 ND<O 005C ND<0 5D ND<5 0 ND<1 0 ND<0 50 ND<50 — 33 79 0 -23 15 1064 8444 MW-12 04712 05 ND<50 — ND<O 50 ND<O 50 ND<0 50 NO-1 0 — 1 1 26 ND<O 50 ND<0 005C ND<O 50 ND<5 D 065 ND<0 50 ND<50 — 31 55 0 20 91 1064 83 34 MW 12 07/12/05 ND<50 ND<0 50 ND<O 50 ND<O 50 ND<1 0 — 0 57 19 ND<O 50 — ND<O 50 ND<5 0 ND<0 50 ND<0 50 ND<50 <5 0 30 55 D 19 91 10 64 83 40 i MW 13 07!28103 — — — — _ — _ _ 32 27 0 — — MIW-13 10/08!03 ND<50 ND<O 50 ND<0 50 ND<O 50 ND<1 0 — ND<2 0 35 ND<2 0 — ND<2 0 ND<100 NC<2 0 ND<2 0 ND<500 ND<O 005 33 43 0 22 83 10 60 80 80 MW 13 01!12!04 — 110 ND<0 50 84 4 3 12 — ND<2 0 21 ND-2 0 ND<2 0 ND<100 ND<2 0 ND<2 0 ND<500 ND<O 0050 3275 0 2215 1060 8070 MW 13 04126/04 — 100 ND<0 50 ND<0 50 ND<0 50 ND<1 0 — ND<D 50 19 ND 50 ND<O 005C ND<0 50 ND<5 0 ND<1 0 ND<0 50 ND<50 — 3121 0 -2061 1060 81 02 MW 13 07!13104 fit 78 ND<O 50 ND<O 50 21 4 — ND<0 50 20 ND<0 50 ND<0 005C ND<O 50 ND<5 0 ND<1 0 ND<0 50 ND<50 — 32 61 0 -22 01 10 60 80 55 MW-13 10126!04 51 — ND<O 50 ND<0 50 ND<0 50 ND<1 0 — ND<0 50 22 ND<0 50 ND<O OO5C ND<O 50 ND<5 0 ND<l 0 ND<0 50 ND<50 — 34 61 0 2401 10 60 8085 MW 13 01112!05 77 — ND<O 50 ND-O 50 ND<0 50 ND<1 0 — ND<0 50 18 ND<0 50 ND<O 005C ND<0 50 ND<5 0 ND<1 0 ND<0 50 ND<50 — 3386 0 2326 1060 61 95 MW 13 04/12/05 71 — ND<O 50 ND<O 50 ND<0 50 ND<1 0 — ND<0 50 16 ND<O 50 ND<0 005C ND<O 50 ND<5 0 ND<O 50 ND<O 50 ND<50 3136 0 -2076 1060 8065 MW 13 07/12/05 81 ND<0 50 ND<0 50 ND<O 50 ND MW 14 07!28!03 — — -- — — — _ _ _ — — — 33 28 0 — — ^- MW 14 10!08!03 -- ND<50 ND<O 50 ND<0 50 ND<0 50 ND<l 0 — ND<2 0 32 ND<2 0 — ND<2 0 ND<100 ND<2 0 ND<2 0 ND<500 ND<O 005 3623 0 -23 12 12 11 82 03 — ND<50 0 6 1 7 0 77 3 2 — ND<2 0 38 ND<2 0 — ND<2 0 ND<100 ND<2 0 ND<2 0 t4D<600 ND<O D050 34 72 0 2261 1211 8186 MW 14 01!12!04 MW-14 04/26/04 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 — ND<O 50 4 ND<O 50 NO<O 005C NDu,50 ND<5 0 ND<1 0 ND<O 50 ND<50 33 17 0 21 06 1211 8241 MW 14 07713!04 ND<50 ND<50 ND<0 50 ND<0 50 1 7 3 5 — 0 78 4 8 ND<0 50 ND<0 005C ND<0 50 ND<5 O ND<1 0 ND<0 50 ND<50 - 3449 0 -2238 1211 8190 MW 14 10/28/04 55 — NOc0 50 NO<0 50 ND<0 50 ND<1 0 — 1 4 38 ND<O 50 ND<O 005C ND<0 50 ND<5 0 ND<1 0 ND<O 50 ND-50 — 36 62 0 -24 51 12 11 81 87 MW 14 01/12/05 ND<50 ND<0 50 ND<O 50 ND<0 50 ND<5 0 — ND<0 50 43 ND<0 50 ND<0 005C ND<O 50 ND<5 0 ND<1 0 ND<O 50 ND<50 35 86 0 23 75 12 11 83 16 MW_14 04/12!05 ND<50 ND<O 50 ND<0 50 ND<O 50 ND<1 0 — ND<0 50 32 ND<0 50 ND<O 005C ND<0 50 ND<5 0 ND<O 50 ND<0 50 N0<50 — 33 38 0 -21 27 12 11 81 90 MW 14 07112/05 ND<50 — ND<O 50 ND<0 50 N1<0 50 ND-1 0 — 32 18 ND<O 50 — ND<0 50 NQ<5 0 ND<O 50 ND<0 50 ND<50 73 32 3$ 0 -20 27 12 11 81 88 MW-15 01/12705 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 — ND<0 50 ND<0 50 ND<0 50 — ND<O 50 ND<5 0 ND<1 0 ND<O 50 ND<50 34 26 0 -22 65 11 61 124 23 MW-15 04/12/05 59 ND<0 50 ND<O 50 ND<O 50 ND<1 0 — ND<0 50 ND<O 50 ND<0 50 -- ND<0 50 ND<5 0 ND<0 50 ND<0 50 ND<50 — 31 84 0 -20 23 1161 120 61 MW 15 04/20/05 89 — 36 96 17 8 0 — ND<O 50 1 0 ND<0 50 — ND<D 50 ND<5 D ND<0 50 ND<0 50 ND<50 - 31 72 0 20 11 11 61 120 61 MW 15 07/12!05 ND<50 ND<0 50 ND<0 5C ND<O 50 1 6 — ND<0 50 ND<O 50 ND<O 50 — ND<O 50 ND<5 0 ND<0 50 ND<0 50 ND150 3130 0 -1969 11 fit 12066 MW 15 08!19105 — — — — — — — — — — — — — -- — — — 32 39 — -20 78 11 61 MW 16 04!20105 410 — 11 31 13 65 -- ND<0 50 0 fit ND<O 50 — ND<0 50 ND<5 0 ND<0 50 ND<0 50 ND<50 - 31 25 D -18 87 1238 120 61 MW-16 08/19!05 ND<50 — ND<0 50 ND<0 50 ND<O 60 1 0 — ND<O 50 050 ND<0 50 — ND<D 50 ND<5 0 ND<0 50 ND<O 56 ND<50 33 32 -20 94 12 36 MW 17 04/20705 30000 - 1100 2500 750 4100 - ND<25 ND<25 N0<25 - ND25ND<50 ND<25 ND<25 ND-2500 — 31 84 0 -2033 1151 120 61 MW 17 08/19705 13000 700 1300 370 1900 ND<10 ND<10 ND<10 ND110 ND<100 ND<10 ND<10 ND<1000 3245 -2094 1151 Explanation DCA Dlchloraethane D1PE Dr isopropyl ether EDB Ethylene di bromide FTSE Ethyl ternary butyl ether GRO Gasoline range organics LPH hquld phase hydrocarbons msl mean sea level M1BE Methyl tertiary-butyl ether ND not detected TAME Tertiary-amyl methyl ether TBA Tertiary-butyl alcohol TOC Top of Casing TPH-G Total petroleum hydrocarbons-gasoline TPPH Total purgeable petroleum hydrocarbons pg1L micrograms per liter < less than laboratory method reporting limit not applicable or not analyzed 4 of 4 tConocoPN�F$ 1Retall Sites144091CAsrs1 GOM005130A409 GWMSRPT 3g05 XLS I