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I �I TABLE 1 GROUNDWATER MONITORING DATA 11 Former Beacon Station No 12419 (2350 Waterloo Road,Stockton,California ll' l ethyl If �I Depth to TOC GW Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME FBA methanol ethanol DCA ED8 GW Elevation Elevabon Number Date u u L u 1L ug/t.)( u u R u L u!I u 1Lfug/01u !L u IL Lug/L) (u 1L feet feet sea levell feet sea levell Comments MW 1 03/31198 65 <0 50 <0 50 <0 50 <0 50 <50 na no no no no no no no 4804 2111 2693 screened 06110198 <50 <0 50 <0 50 <0 50 <0 50 <5 0 Ina as no no no no no no 4250 21 39 interval 09106/98 230 81 058 <0 50 072 <0 50 <0 50 <0 50 <0 50 17 <50 110 no na 46 95 2584 no odor I no sheen 65 85 11112/98 ns as ns ns ns Ins Ins Ins ns ns ns as AS ns 2036 wellhead survey 12130/98 87 <0 50 <0 50 <0 50 <0$0 <5 0 no "no no no no ng no no 4533 2497 no odor I no sheen 03/26199 55 <0 50 -060 <0 50 <0 50 <0 50 <0 50 <0 5D <0 50 <5 0 <50 <10 no no 41 16 2080 no odor I no sheen 06/02/99 180 74 <0 50 051 <0 50 <0 50 <10 50 <0 50 <0 50 <5 0 <50 <5 0 78 <0 50 4054 2028 no odor!no sheen 08131!99 260 <0 50 <0 SO 051 <0 50 <0 50 <0 50 <0 50 <0 50 16 <50 <5 0 130 <0 50 4546 2510 no comment 12/09199 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5D 59 <0 50 4695 2659 02!21100 <50 <0 50 <0 50 <0 50 <0 50 <0 50 '050 <0 50 <0 50 -50 <50 <50 17 <0 50 4526 2490 no odor/no sheen 05/18100 <50 <0 50 27 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 no no 3968 1932 no odor/no sheen 09/26100 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no ino no no no no no no 4876 2840 no odor 1 no sheen 12/20100 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no no no no no no no na 4735 2699 no odor I no sheen 03127/01 c50 <0 50 <0 50 <0 50 <0 50 <5 0 ,no Ina no no no no no no 4613 25 77 no odor 1 no sheen 06126101 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 33 <0 50 4870 2834 no odor I no sheen 09/05/01 130 <0 50 <0 50 <0 50 -050 �'5 0 'no Ina no no no na no no 5378 3342 no odor I no sheen 11130!01 c50 <0 50 <0 50 <0 50 <0 50 <15 0 Ina no no na no no no na 5378 3342 no odor 1 no sheen 02/26/02 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no Ina na no no no na no 5046 3010 no odor 1 no sheen 05/16102 <50 <0 50 15 <0 50 <0 50 055 <0 50 <0 50 <0 50 <5 0 <50 <50 14 <0 50 5062 21 93 2869 no odor I no sheen 09/12!02 110 <0 50 085 <0 50 <0 50 <5 0 I`no na no no no no no no 58 72 3679 no odor/no sheen 12104/02 <50 <0 50 <0 50 <0 50 <0 50 <5 0 Ulna Ina no no no no no no 5699 3506 no odor 1 no sheen 02/17103 <5D <0 50 <0 50 <D 50 <0 50 <0 50 IIna Ina no no no no na no 53 85 31 92 no odor 1 no sheen 06/02103 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 84 <0 50 5324 3131 no odor/no sheen 09/18103 ns ns ns ns ns ns as ns as as as ns ns ns nm nm not sampled 11124103 as ns ns ns ns Ins I ns as ns ns ns ns ns ns 5848 3655 not sampled 02!23/04 <50 <0 50 085 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 40 <0 50 5500 3307 no odor I no sheen 06/07/04 AS as ns as ns as lIns ns ns ns as ns ns as 5538 3345 not sampled 09107104 ns as as ns as ns {Ins ns ns as ns ns ns ns 61 89 3996 not sampled 12110/04 ns ns ns ns ns as �ns ns as ns ns ns ns ns 5951 3758 not sampled 03/08/05 <50 <0 50 077 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 1 3 <0 50 6589 3396 odor I no sheen 05124/05 ns as as ns ns aslns ns as ns ns as as as 51 00 2907 not sampled 08/31/05 ns as as ns ns ns Ins as ns ns ns ns ns ns 5623 3430 not sampled � 1k II ' w l I I � I I „.99-05 ` Pm led No P 13 HORIZON ENVIR06AL INC