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• • F'age2oi3 Tablet Groundwater Elevation and Analytical Data Former ARCO Service Station#4493 205 N Center St,S1oc4don,CA Well Depth Groundwater Groundwater Ethyl Xylenes MtBE MtBE Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (8020) (8260) DO Number Sampled (ft MSL) (K TOC) (ft MSL) Change(ft) (ppb) (ppb) (ppb) {ppb) _fppb}_ LPPb} ^(Ppb) (mg�� MW 4 2/16/1999 1219 14 41 222 - 15,000 503 NO 707 1,550 9,990 3/10/1999 1361 1 42 0 B - 6/17/1999 12 43 024 1 18 10,800 230 177 597 936 766 -- 9/24/1999 NP 12 72 0 53 029 4,880 173 <100 262 <10 670 49 12/16/1999 NP 1517 298 2 45 7 830 260 <10 0 570 113 1,310 1 9 3/28/2000 P 1283 064 2 34 5 330 298 <20 0 318 443 4,960 -- 1 00 6/19/2000 P 1244 0 25 0 39 2,860 186 <20 0 223 123 3 790 <2 0 3 82 9/19/2000 P 1332 -1 13 -068 3,460 234 <100 900 150 2 210 1,710 08 11/30/2000 P 1444 225 1 12 3,640 219/177 <5 00 499/389' 39 0/27 0' 427 073 9/13/2001 P 1226 -0 07 2 1 B 1 600 110179' <10<20' 21/<20 11/24 - 680 072 12/31)'2001 P 1260 0 41 -0 34 <50 <0 501<1 0' <0 50/<1 0 <0 50/<1 0' <0 50/<1 0' <0 50 3/13/2002 P 1626 4 07 3 66 960 27!25" <5 0/0 96' <5 0/3 5' <5 0/4 7' 120 0 98 6/2a/2002 P 1466 -2 47 ISO 510 42 <0 5 2 8 1 9 - 130 1 2 MW 5 6/19/2000 P 1203 1298 -095 <50 275 <0 500 <0 500 <0 50C <2 50 <2 0 209 9/19/2000 P 1365 -1 62 -067 <50 1 19 <0 500 <0 500 <0 500 <2 50 <2 0 06 11/30/2000 P 1488 285 1 23 <50 0 0 694 <0 500 <0 500 <0 500 <2 00 1 21 9/13/2001 P 1598 395 1 10 <50 <0 501<2 0' <0 50/<2 0' <0 50/<2 0' <0 50/<2 0' <2 0 088 12/31/2001 P NS 54' 7 21/5 9' <0 501<1 0' 1 5/1 0' <0 50/<l 0' 60 3/13/2002 P 1878 675 -- 970 $2/27' 0 67/0 51 39/40' 3 1/2 4' - 200 046 6/2812002 P 1730 -527 1 48 460 15 <0 5 4 9 1 1 - 1 100 0 9 MW 6 6/19/2000 P 1326 1381 -055 <50 1 87 <0 500 0 523 2 34 171 144 1 83 9/19/2000 P 1456 1 30 075 <50 1 30 <0 500 <0 Soo <0 500 119 102 0 7 11/302000 P 1579 253 1 23 <50 0 <0 500 <0 5002 08' <0 500 <0 500/8 00' 412 0 64 9/132001 P 1360 0 34 219 <50 <0 SO/<2 0' <0,50/<2 0' <0 50/<2 0' <0 50/<2 0" <2 0 0 78 12/31/2001 P 1463 1 37 1 03 <50 <0 501<1 0' <0 50/<1 0' <0 50/<1 0' <0 50/<1 0' <0 50 -- 3/13/2002 P 1681 -355 2 1 B <50 <0 501<0 50' <0 50/<O 50' <0 50/<0 50' <0 50/<0 50' 066 » 6/2812002 P 1474 4 48 207 <50 <05 <0 5 <0 5 <0 5 - 085 12 MW 7 6/192000 P 11 07 11 87 -080 <50 <0 500 <0 500 <0 500 <0 500 <2 50 <2 0 1 78 9/192000 P 1259 -152 -072 <60 <0 500 <0 500 <0 500 <0 500 <2 50 <2 0 1 0 11/302000 P 1383 276 -1 24 <50 0 <0 500 <0 500/3 80' <0 500 <0 SOWS 96' - 2 34 062 9/13/2001 P 1217 1 10 1 66 <50 4 6<2 0' <0 50/<2 0' <0,50/<2 Q' <0 501<2 0' <2 0 1 09 12131/2001 P 1321 214 1 04 900 17/8 6' <0 50/<1 Q' 0 64/<1 0' 6 0/4 4' -- 9 9 -- 3/132002 P 1495 388 -1 74 870 11/1 5 <0 50/<O 50' <0 50/<O 50' 1 2/0 72` - 18 0 46 6128/2002 P 1357 -250 1 38 370 10 <0 5 <0 5 062 - 53 1 7 TB 1 12/312001 - -- <50 <0 50 <0 50 <0 50 <0 50 - — QGTB 3/132002 » » <50 <0 50 <0 50 <0 50 <0 50 1,W5 BP AAC0104493iQuarte W-QTR Wab1e 1 2 3