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l 1 Table 3 Volatile Organic Compounds Analytical Data(continued) I Former ARCO Service Station#4493 205 N Center SL,Stockton,CA trans-1 2 12 13- 2,2 1 1 Hexa o- 1 1 12 1 1 2 2 Tetrachloro- 1 2 3-Trf 1 2 4 Tri-- 1 1 1 Tn• 1 121 Tn- Trnchloro- Trichloroa 1 2 3-Trr- 1 2 4 1 3 5 Dichkxo- Dichloro- Dtchloroa Dichloro- Dichloro- chloro- Isopropyl- p4sopro- methylene Naphtha Propyl- TncHoro-Tetrachlorc ethene chloro chloro- chloro- chloro- ethene ffurora chloro- Trunethyl- Trtmethyi• Vinyl Well Date ethene propane propane propane propene butadiene benzene pyltoluene chloride gene benzene Styrene ethane ethane (PCE) benzene benzene ethane ethane (TCE) methane propane benzene benzene Chloride Number Sampled p (ppb) (Ppb) b b (ppb) ( (ppb) ppb (ppb) b) (ppb) b) (Ppb) (ppb) (ppb) b (ppb) (ppb)j b b ppb b) MW 1 3/1011999 -- — ND ND ND ND ND ND — 433 ND ND 31106'1999 -- _ 6/1711999 2 62 <10 <2 00 <25 <10 2 36 704 2 34 — 126 4 40 <2 0 <2 00 9124!1999 12/16/1999 3 2B — <2 0 <2 00 <5 <2 0 — <20 c2 0 '20 — _ 376 <2 <2 <2 00 3/28/2000 4 7 — <2 00 <2 00 <5 00 <2 00 220 2 38 2 74 — 227 — <200 <2 00 <2 00 6/19/2000 3 66 <2 00 <2 00 <5 00 <5 00 220 2 16 c2 00 153 — <2 00 <2 00 <2 00 9119!2000 348 <2 00 <2 00 — <5 00 <5 00 <2 00 <2 00 <2 00 185 <2 00 <2 00 <200 11/30/2000 336 — <2 00 <2 00 c5 00 <2 00 <2 00 <2 00 218 189 <2 00 <2 00 <2 00 9/13/2001 2 8 <2 0 <2 0 <5 0 <2 0 <2 0 <2 0 <2 0 — 12 <2 0 c2 0 <2 0 1 2/3112 0 0 1 <1 0 <1 0 <1 0 <25 <1 0 <1 0 <1 0 <1 0 3/13/2002 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <1 0 <0 50 — 35 <050 <0 50 <0 50 6/28/2002 1 4 — <0 5 <0 5 <1 0 <0 5 <05 <1 <0 5 47 <0 5 <0 5 1 3 9/16/2002 0 79 <0 5 <0 5 <5 0 <0 5 <05 <0 5 <0 5 2 5 <0 5 <0 5 <0 5 1215/2002 <0 5 <0 5 <0 5 <2 0 <0 5 <220 <0 5 <0 5 <0 5 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <05 <06 <0 5 <0 5 2 3 <0 5 <05 <0 5 <0 5 <0 5 MW-2 2/16/1999 ND - ND - ND ND - ND N0 2 50 — - - — 106 = ND ND 3/10/1999 6117/1999 <2 0 <10 <2 00 <25 <10 2 0 <2 0 <2 0 59 2 — I <2 0 <2 0 <2 00 9/24/1999 <2 0 <20 <2 00 <5 0 <2 0 <2 0 <2 0 <2 0 54 4 <2 0 <2 0 <2 00 12/16/1999 <20 <20 200 <50 20 20 <20 <20 — 534 — <20 <20 <200 3/28/2000 <2 00 — <2 00 <2 00 <5 00 <2 00 <2 00 2 00 <2 00 96 6 <2 00 <2 00 <2 00 6/19/2000 <2 00 <2 00 c2 00 <5 00 <5 00 <2 00 2 00 <2 00 776 <2 00 <2 00 <2 00 9/19/2000 2 00 <2 00 <2 00 <5 00 <5 00 i <2 00 <2 00 <2 00 — 73 8 <2 00 <2 00 <2 00 11130!2000 <2 00 — <2 00 <2 DO <5 00 2 00 <2 00 12 00 240 110 <2 00 <2 00 <200 9/1312001 <2 0 — <2 0 <2 0 <5 0 <2 0 <2 0 <2 0 3 6 — 240 <20 <2 0 <2 0 12/3112001 <1 0 <1 0 <1 0 <2 5 <1 0 <1 0 <1 0 3 0 3/1312002 c1 0 <1 0 <1 0 <25 <1 0 <1 0 <2 0 24 110 <1 0 <1 0 2 1 6/28/2002 <1 - - <1 0 <1 0 - <20 <1 0 <1 0 <2 0 1 9 85 — - <1 <1 2 9 9/16/2002 <2 5 - - <25 <2 5 25 <25 <2 5 <2 5 <25 - — 64 - - <2 5 <2 5 <25 12/512002 <20 <20 <20 <80 <20 <8a <20 20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 58 <20 <20 <20 <20 <20 MW 3 2/16/1999 ND — ND - ND ND - ND ND ND 209 1 -- ND NO 3/10/1999 -- 6/1711999 -6/17119 9 9 <2 0 <10 <2 00 <25 <10 I - <2 0 <2 0 <2 0 _ <2 0 — 2 96 c2 0 200 9/24/1999 -- _ _ _ 1 2/1 611 999 <2 0 — <2 0 <2 00 <5 0 <2 0 <2 0 <2 0 c2 0 <2 0 7 <2 0 <2 0 <2 00 3/26/2000 <2 00 — 2 00 <2 00 <5 00 <2 00 <2 00 <2 00 <2 00 <2 00 I <2 00 <2 00 <2 00 6119/2000 <2 00 — <2 00 <2 00 <5 00 <2 00i - <2 00 <2 00 <2 00 — <2 00 <2 00 2 00 <2 00 9/19/2000 <2 00 <2 00 <2 00 <5 00 c2 00 i <2 00 <2 00 <2 00 — <2 00 — <2 OD <2 00 c2 00 11/3012000 <2 00 — — <2 00 <2 00 <5 00 <2 00 2 00 <2 00 <2 00 <2 00 — <200 <2 00 <2 00 9/13/2001 Well titled with sediment 12/31/2001 <10 — 18 <10 26 46 <10 <10 <10 <10 — <10 <10 <10 311312002 <O 50 - - <0 50 <0 50 - <1 0 <0 50 <0 50 <1 0 <0 50 - <0 50 — <0 50 <0 50 <0 50 612812002 <0 5 <0 5 <05 <1 0 <05 - <0 5 <1 <05 „ <05 <05 <0 5 <0 5 9/16/2002 <0 5 <05 <05 <5 0 <0 5 — <0 5 <05 <05 <0 5 — <0 5 <0 5 c0 5 12/5/2002 <0 5 <0.5 <0 5 <2 0 <05 <2 0 <05 <05 <0 5 <5.0 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0.5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 MW-4 2/16/1999 ND - - 592 - - 342 216 ND ND ND - ND — ND ND 3/1011999 - 6/17/1999 <2 0 472 <100 372 179 2 0 <2 0 <2 0 — 2 0 — 1,210 299 <10 0 9/24/1999 <4 0 31 8 <4 00 142 109 <4 0 <4 0 <4 0 844 — 720 61 6 <4 00 1 211 6/1 999 <4 0 — 728 624 61 6 224 1 <4 0 <4 0 <40 <4 0 75t 21 4 214 3128!2006 2 00 — 32 2 <2 00 110 932 <2 00 <2 00 <2 00 — <2 00 362 53 8 570 6/19/2000 2 00 — 294 <2 00 846 734 » 2 00 <2 00 2 00 <2 00 156 15$ 382 9/19/2000 2 00 — 308 <2 00 — 75 104 <2 00 <2 00 <2 00 <2 00 162 153 145 71/30/2000 <2 OO — 358 2 90 112 114 <2 00 2 00 c2 00 — <2 00 157 338 356 9/13/2001 <20 29 <20 <50 86 20 <20 <20 <P0 29 <20 <20 17_/31/2001 <1 0 -- - <1 0 <1 0 - 2 5 <1 0 — <1 0 <1 0 <1 0 <1 0 - <1 0 <1 0 <10 3/1312002 <0 50 — — 9 3 <0 50 6 9 240 — 097 <1 0 <0 50 _ <0 50 _ — 10 065 <0 50 612812002 c1 3 <1 2 5 5 9 <1 <2 <1 9/16/2002 2S — 63 <25 — <25 190 <25 <25 25 25 _ 3 <25 25 12/5/2002 25 <25 <25 <10 <25 <10 180 <25 <2.5 <25 330 <25 <25 <25 <25 <25 <25 <25 25 <25 <2§ <26 <25 <25 <25 MW 5 6119!2000 2 00 » - - <2 00 <2 00 <5 00 2 00 <2 00 <2 OO <2 00 - 202 I <2 00 <2 00 <2 00 9/19/2000 <2 DO <2 00 2 00 - <5 00 <2 00 <2 00 <2 04 <2 00 108 <2 00 <2 DO 2 00 11/3012000 c2 00 — _ _ 2 00 <2 00 <5 00 <2 00 2 00 <2 00 <2 00 - 8 0 _ — <2 00 <2 00 <2 00 9/1312001 2 0 <20 <2 O 2 <50 <20 <20 0 <20 40 20 <20 <20 1213112001 <1 0 <1 0 <1 0 <2 5 11 <1 0 <1 0 <1 0 12 <10 <1 0 <1 0 3/13/2002 <0 50 - — 81 <0 50 2 0 13 <0 50 <1 0 1 1 — 31 - 12 093 72