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� � 1 11� ' TABLE 1 I I; GROUNDWATER MONITORING DATA Former Beacon Station No 12419 2350 Waterloo Road, Stockton,California l ethyl 1 II Depth to TOC GW i Well TPH9 benzene toluene benzene xylenes MTBE 11 DI PE ETBE TANTE TBA methanol ethanol DCA EDB GW Elevation Elevation i Number Date (uglL) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L)'(ug/L) (ug l-)l (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (feet) (feet sea level) (feet sea level) Comments I VW 2 03/26/94 ns as as ns as ns ns ns as ns ns ns ns as dry nm nm dry I screened 06/02/99 ns as as ns ns ns as ns ns ns ns ns ns as dry nm dry interval 08/31/99 ns AS as ns as ns as ns as ns ns ns ns as dry nm dry I 15 25 12!09199 ns as as ns ns ns �# as ns ns ns ns ns s ns as dry nm dry 02!21100 ns ns as ns ns ns I ns ns ns ns ns ns ns ns dry nm dry 05/18/00 ns as as ns ns ns 19 ns ns as ns ns ns ns as dry nm dry 09/26100 ns as as ns ns ns ns ns ns ns as ns ns ns dry nm dry 12/21/00 as as as ns ns as as ns ns ns ns ns ns ns dry nm dry 03/27101as as ns ns ns ns ns ns as ns as ns ns ns dry nm dry 06/26/01 ns as as ns ns ns I> as ns as ns as as ns ns dry nm dry I 09/05/01 as as ns as ns ns P as ns ns ns ns ns ns ns dry nm dry 11/30/01 ns as n$ ns ns ns a ns ns as ns ns ns ns ns dry nm dry 02126!02 as ns ns ns ns ns h as ns as ns ns ns ns as dry nm dry 05/16102 as ns ns ns ns ns ns ns ns ns ns as ns as dry nm dry 12/04102 ns as as ns ns ns ns ns ns ns as as as as dry nm dry 02117/03 as as ns ns as ns 1+ ns ns ns ns ns as ns as dry nm dry I 06/03/03 as as as ns ns ns ns ns ns ns ns as as ns dry nm dry 09/18103 as ns ns ns as ns ns as ns ns ns ns ns ns dry nm dry 11/24/03 ns ns as as as ns ns ns ns ns ns ns ns ns dry nm dry 02/23/04 as ns ns ns as ns ns ns ns ns ns ns as ns dry nm dry l 06/07/04 as ns ns ns ns ns ns as ns ns ns ns ns ns dry nm dry 09/07/04 as as ns ns ns ns I' ns ns ns ns ns ns ns ns dry nm dry 12/10/04 as ns ns ns ns ns it ns ns ns ns ns ns ns ns dry nm dry I ( A5 1 02/21/00 80000 7600 16000 1600 9100 34 i <2 0 <2 0 <2 0 <20 380 12000 180 250 4569 nm nm slight odor/no sheen 1 screened 05/18/00 23000 2300 4800 480 2900 <10 y 410 <10 <10 <1D0 <1000 <100 na na 4109 nm no odor/no sheen interval 09/26/00 54000 2600 5300 590 3200 <5 0 na na na na na na na na 4913 nm slight odor/no sheen 64 69 12121100 52000 5000 10000 1200 6000 <500 na na na na na na na na 4779 nm odorino sheen a 03/27/01 140000 16000 34000 3300 18000 <500 na na na na na na na na 4665 nm odor/no sheen 06/26/01 140000 14000 34000 3700 18000 <1 0 { 0 0 <1 0 <1 0 <10 <100 <100 83 140 4979 am odor/no sheen 09/05/01 210000 17000 39000 4600 25000 <500 1. na na na na na ra na na 5441 nm odor/no sheen 11/30/01 150000 12000 32000 4000 19000 <20001 na na na na na na na na 5470 nm odor/no sheen i 02/27/02 200000 11000 38000 3600 19000 <20001 na na na na na na na na 5096 nm slight odor/no sheen I 05/16/02 120000 11000 23000 2200 1100D <100 <100, <100 <10o <1000 <10000 <1000 <100 <100 51 11 2242 2a 69 slight odor/no sheen 09/13/02 160000 12000 44000 5100 22000 <200 I' na na na na na na na na 5928 3686 odor no sheen 12/04/02 110000 8300 25000 2200 12000 <500 na na na na na na na na 5750 3508 odor no sheen i 02/17/03 170000 18000 33000 3100 15000 <200 '1 na na na na na na na na 5497 3255 odor/no sheen I 06/03/03 190000 20000 38000 4200 19000 <20 <20 <20 <20 <200 <2000 <200 B2 93 5311 31 29 odor I no sheen 09/18/03 as ns as as ns as li ns � as as ns ns ns ns ns nm nm not sampled i 11/24/03 as ns as as ns as ns ns ns ns ns ns ns ns 5885 3643 not sampled 02/23/04 200000 13000 29000 3500 1a000 <50 <50 <50 <50 <500 <5000 <500 <50 <50 5536 3294 odorino sheen I 06/07/04 as ns ns ns ns as ns ns ns ns ns ns ns as 5563 33 21 not sampled 09/07/04 as ns ns ns ns as ns ns I as ns ns ns ns ns 62 11 3969 not sampled 12110104 ns ns as as ns as ns ns JII ns as ns ns ns ns 5979 3737 not sampled y 141'=04 A.Pralecl No 14191 I Page 10 HORIZON ENVIRONMEN C