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i i i ! i i ! i i ! Table 1 • Groundwater Analytical Data Parkinson's Arco 3250 West Hammer Lane Stockton,California Top of Casing Depth to Groundwater TPH as Ethyl- Sample Date Elevation Water Elevation Gasoline Benzene Toluene benzene Xylenes MtBE DIPE ETBE TAME TBA 1,2 DCA Identification Sampled MSL feet b s MSL u lug,') (ug/1) u l (ug") u i jug/1)( (V911) (ug/1) u l EDB u l (ug/1) MW 3 09/21/00 376 1234 858 5 900 413 243 562 468 346 <2 0 <2 0 208 <200 01/19/01 1230 854 1,870 182 582 129 231 682 <2 0 <2 0 443 <200 04/23/01 1134 758 1,160 63 <50 105 184 683 <2 0 <2 0 423 <200 07/27/01 1248 -872 870 21 16 90 17 360 <20 <20 <20 <2,000 11/01101 1352 -976 760 35 <0 5 5 8 92 600 <1 0 <10 46 <100 01/28102 1200 -824 560 59 087 46 45 590 <05 <05 38 <50 04/23/02 1209 -833 220 091 <0 3 34 44 540 <5 0 <5 0 <5 0 1,800 07/29/02 4 67111 1302 835 170 0 39 039 14 30 300 <5 0 <5 0 10 <50 10/07/02 1390 923 250 <0 30 030 085 082 220 <5 0 <5 0 <5 0 <50 01/02/03 1336 -869 15012 <0 30 38 15 22 360 <5 0 <5 0 <5 0 <50 04103/03 1306 -839 1742} <0 50 30 1 1 <10 280 <5 0 <5 0 <50 <50 07121!03 1372 905 160 <0 50 19 <0 50 <10 240 <50 <50 <5 0 <50 10/13/03 1509 1042 <50 <0 50 084 <0 50 <10 22 <0 50 <0 50 <0 50 <50 <0 50 <0 50 01/12/04 131 9 i3 t� 200 <0 50 <0 50 <0 50 <10 15 <0 50 <0 50 ~t2-, <0 50 <0 50 MW 4 07/29/02 480111 13 28 848 <50 1 1 <0 3 <0 3 <0 6 14,000 <50 88 160 <50 10/07/02 1412 9 32 <50 <0 30 <0 30 <0 30 <0 60 9,600 <50 <5 0 110 140 01102103 1356 876 <50 33 073 <0 30 1 1 14,000 <50 <5 0 <5 0 <50 04/03/03 1335 855 <50 <0 50 <050 <050 <10 12,000 <50 <5 0 200 <50 07/21/03 1393 913 <50 <0 50 <0 50 <0 50 <1 0 14,000 <50 <50 250 <50 10113t03 1470 990 <50 <0 50 <0 50 <0 50 <10 9,900$1 0<100 <100 <100 <1000 <100 <100 01/12104 1397 917 <50 28 <0 50 <0 50 <10 �b i99� <0 50 <0 50 35 5,500 <0 50 <0 50 Srz r MW 5 07/29/02 513111 1361 8 48 <50 <0 3 0 9 <0 3 12 18,000 <25 <25 150 5,700 10/07/02 1440 927 <50 <0 30 042 <0 30 <0 60 29,000 <250 <250 <250 5 600 01/02/03 1387 874 <50 <0 30 0 38 <0 30 <0 60 41,000 <5 0 <5 0 230 12 000 04/03/03 1361 8 48 <50 <0 50 <0 50 <0 50 <10 29 000 <5 0 <5 0 370 540 07/21/03 1425 912 <50 <0 50 <0 50 <0 50 <10 10,000 <5 0 <5 0 <5 0 41,000 10/13/03 1502 989 <50 <0 50 <0 50 <0 50 <1 0 8 800 <100 <100 <100 <1000 <100 <100 01112!04 1431 918 <50 <0 50 <0 50 <0 50 <10 1,300 <0 50 <0 50 15 19,000 <0 50 <0 50 U94 Micrograms per liter DIPS D1 isopropyl ether ETBE Ethyf tert butyl ether MSL Mean sea level TPH Total petroleum hydrocarbons TAME Tert amyl methyl ether r bgs Below ground surface MOE Methyl tent butyl ether TBA Tert butyl alcohol EDB 1,2 Dlbromoethane 12 DCA 12 Dichloromethane f'1 Well casing elevations surveyed by Morrow Surveying on 7W2 fzl Sample contained compounds in the gasoline range,but the chromatogram pattern was not consistent with the expected pattem N 5rancfpllProjects\Projects\8805040\]A\01071tQ04 112612004