ARCHIVED REPORTS XR0000832 - Laserfiche WebLink

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TABLE 1 Groundwater Monitoring Data ARCO Service Station No 2186 3212 North California Street, Stockton, California Elevation of Static Water[I] Screen Elevation of Total Well Top of Casing Level Interval Groundwater Groundwater TPHG Benzene Toluene Ethylbenzene Xylenes MTBE[31 Sample No Date feet msl feet b s feet b feet msl Flow Direction Observations VW-313 5123/96 1501 4576 42-61 -3075 E 290 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S 9/19/96 5402 3901 NE 310 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S 11/27/96 51 15 36 14 SE 280 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S 3121/97 4249 2748 SE 180 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S 5122197 4428 -2927 ENE 240 <0 5 <0 5 <0 5 <0 5 <3 0 No FP,No S 8120/97 5021 -3520 E NE 200 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S 11/20/97 4946 -3445 E 160 46 44 26 67 <5 0 No FP,No S 2117198 4472 -2971 E SE 93 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S 6124/98 3629 -2127 E <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP,No S 9121/98 3969 -2468 E NE 227 456 <0 5 222 124 159 No FP,No S 12/14/98 3790 -2299 E NE 57 l <0 5 <0 5 <0 5 105 <5 0 No FP,No S 3131/99 35 81 -2090 N-NE <50 <0 5 <0 5 <0 5 <0 5 <5 0 No FP No S 6111199 3460 -1959 E NE 152 19 <0 5 699 162 186 No FP,No S 9110199 3877 -2376 E-NE 1,210 546 <0 5 545 137 1590 No FP,No S 1213199 3876 -23 75 E 804 <0 5 <0 5 <0 5 <0 5 149 No FP,No S 413100 3545 -2044 NE <50 3 38 <0 5 1 86 562 30 No FP,No S 6/22100 35 51 -2050 E 1,690 848 384 227 432 3,180[4] No FP,No S 9127100 4081 -2580 E NE NS NS NS NS NS NS No FP,No S 10/19/00 4064 -2563 ENE NS NS NS NS NS NS No FP,No S 12/20/00 3971 -2370 E-NE <50 <0 5 <0 5 <0 5 <0 5 26 5[4] No FP,No S 3116101 3760 -2259 E-NE <50 <0 5 <0 5 <0 5 <0 5 9 12[4] No FP,No S 6!21/01 4043 -2542 NE <1,000** 97 53 290 750 5,000[4] No FP,No S 09/13/01(8) 4619 -31 18 E-NE <50 <0 5 <0 5 <0 5 <0 5 90[4] No IP,No S msl=mean sea level TPHG=Total petroleum hydrocarbons as gasoline •=Raised MRL due to high analyte concentration requiring sample dilution bgs=below ground surface MTBE=Methyl tertiary butyl ether *`=Reporting limit raised due to matrix interference (11 Measured below top of casing <=Below detection limit for the analytical method used [21 Measured from ground surface FP=Free product Measured in feet [31 MTBE was analyzed using USEPA Method 8020 S=Sheen (4)MTBE was analyzed using USEPA Method 8260 NM=Not measured [5]Chromatogram Pattern Weathered Gasoline C6-C-12 NA=Not analyzed [61 Sample analyzed outside USEPA recommended hold time NS=Not sampled (71 Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattern of the requested fuel [8]On the chain-of-custody farms,samples were identified as MW-111,MW-213,and MW-311,respectively ARCO 2196 Qu neriy Data X S 6 of 6 delta