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# ; TABLE, 1 �3 GROUNDWATER MONITORING DATA Former Beacon Station No 12419 2350 Waterloo Road, Stockton, California ethyl- Depth to TGC GW Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation Number Date (u 1L (ug1L) (ug1L) (ug1L) (ug1L) ugll_) (ug/l.[1) (u IL) (uglL) (ug1L ) (ug lL) (uglL) (ug1L) (ug1L) (feet) (feet sea level) (feet sea level) Comments MW-5 03/31/98 75 <0 50 <0 50 <0 50 <0 50 <5 0 p na na na na I na na na na 4846 2043 -2803 screened 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 <50 ' nal na na na na na na na 42 72 -2229 Interval 09108!98 <50 12 091 <0 50 094 <0 501 <0 50 <0 50 '1050 <5 0 '<50 <5 0 na na 4692 -2649 no odor/no sheen - 48 -71' 11/12/98 ns ns ns ns ns ns ; ns[ ns; ns ns" ns ns ns ns 2043 wellhead survey 12!30198 110 067 <0 50 <0 50 <0 50 <50 p, na I 1181 na na na na na na 4545 -2502 no odor 1 no sheen 03/26/99 67 <0 50 <0 50 <0 50 <0 50 <0 50, <0 50 <0 50 <0 50 <5 0 <50 <20 na na 41 26 -2083 no odor/no sheen 06/02/99 <50 <0 50 c0 50 <0 50 <0 50 <0 50�, -056 <0 6 <0 50 <50 <50 <5 0 71 <0 50 4061 „ -2018 no odor 1 no sheen - 08/31/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50, <0 50 <0 50 <0 50 <5 0 <50 <50 16 <0 50 4549 -2506 no comment 12!09199 140 <0 50 <0 50 <0 50 <0 50 <050 <0 50 <0 50 <0 50 <5 0 <50 <5 0 `200 <0 50 4704 -2661 02/21100 140 <0 50 <0 50' <0 50 <0 50 <0 50 <0 50 <0 50 1:0 50 } 0 <50 <50 190 <0 50 4547 2504 no odor 1 no sheen IN 05118/00 <100 <1 0 <1 0 <1 0 <1 0 <1 0 <1 4 <1 0 <1 0 12 <100 <10 na na 4071 -2028 no odor 1 no sheen 09126/00 64 <0 50 <0 50 <0 50 <0 50 <50 1 nanab na na , na na na na 4882 -2839 'no odor 1 no sheen 12120/00 <50 <0 50 <0 50 <0 50 <0 50 <5 0 11 na nal na na na na na na 4741 -2698 no odor 1 no sheen 03/27/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4619 -2576 no odor 1 no sheen 06!26!01 <50 <0 50 <0 50 <0 50 1050 <0 50 1050 <0 50 <0 50 <5 0 <50 <5 0 16 <0 50 4876 -2833 no odor 1 no sheen 09105/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 !f na nal na na o 1181 na na na 5379 11 -3336 no odor 1 no sheen 11130/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 j; 1181 1{ nal na na ,na na na na 5388 -3345 no odor!no sheen 02127102 <50 <0 50 062 <0 50 <0 50 <5 0 na i nal na na na na na na 5052 -3009 no odor 1 no sheen 05/16102 <50 <0 50 <0 50 <0 50 <0 50 <0 so; <0 50 <0 50 <0 50 <50 <50 <5 0 14 <0 50 5062 2199 -2863 no odor 1 no sheen 09112/02 <50 <0 50 <0 50 <0 50 <0 50 <50 14 na 11 na� na na na na na na 5857 -3658 no odor 1 no sheen 12/04102 <50 <0 50 <0 50 ' <0 50 <0 50 <5 0 na 1181 na na na na na na 6711 -3512 no odor 1 no sheen 02!17103 57 <0 50 <0 50 E <0 50 <0 50 <0 50 na 11 na�i na na na na na na 5403 -3204 no odor 1 no sheen 06/02103 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 30 <0 50 53 i 7 -31 18 no odor 1 no sheen 09/18103 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm + nm not sampled I 11/24/03 ns ns ns ns ns ns ns�� ns ns ns ns ns ns ns 58 33 -3634 not sampled a 02123/04 <50 <0 50 <0 50 , <0 50 <0 50 <0 50 1 <0 50 <0 50 <0 50 <5 0 <50 <50 22 <0 50 5484 3285 no odor 1 no sheen 06107104 ns ns ns ns ns ns ' ns jE ns ns ns kris r ns ns ns 5504 -3305 not sampled i 09/07104 ns ns ns ns ns ns 11 ns IE ns ns ns ns ns ns ns 61 53 -3954 not sampled 12110/04 ns ns ns ns ns ns ns I ns ns ns its ns ns ns 5930 -3731 not sampled I 03/08/05 <50 <0 50 <0 50 <0 50 <0 50 <0 50 F 1056! <0 50 <0 50 <5 0 <50 <50 <0 50 <0 50 5574 -3375 no odor!no sheen 05/24/05 ns ns ns ns ns ns ns;I ns ns ns ns ns ns ns 5085 -2886 not sampled _ 1 08/31105 ns ns ns ns ns ns ns l� ns ns ns _11S ns ns ns 5583 3384 not sampled 12112105 ns ns ns ns ns ns t ns ns ns ns !ns ns ns ns 5328 -3129 not sampled 1 I a f - I i 1 , e d ..._ 1 Protect 48 I P f 16 HORIZON ENVIROMOU IN& 1 ES