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I <br /> s TABU <br /> GROUNDWATER MO ORING DATA <br /> Former Beacon Station No 12419 <br /> 2350 Waterloo Road, Stockton,California <br /> ethyl Depth to TOC GW <br /> Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date (ug/L) (ug/L) (ug/L) (ug/L) (ug]L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ugIL) (ug/L) (ug/L) (feet) (feet sea level) (feet sea level) Comments <br /> MW 5 03131/98 75 <0 50 <0 50 <0 50 <0 50 <50 na no no no na no no na 4846 2043 2803 <br /> screened 06110198 <50 <0 50 <0 50 <0 50 <0 50 i <50 na na no no no na na na 4272 2229 <br /> interval 09108/98 <50 1 2 091 <0 50 094 <0 50 <0 50 4 50 <0 50 -50 <50 <5 0 no na 4692 2649 no odor 1 no sheen <br /> 48 71 11/1 W98 ns ns ns ns ns ns ns ns ns ns as as ns ns 2043 wellhead survey <br /> 12/30/98 Ito 067 4 50 <0 50 <0 50 <5 0 no no no na na no no no 4545 2502 no odor 1 no sheen <br /> 03/26199 67 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 -50 <50 <20 no na 41 26 20 B3 no odor 1 no sheen <br /> 06/02/99 <50 <0 50 <0 50 <0 50 <0 50 <0511 <0 50 <0 50 <0 50 <51 <50 <5 0 71 <0 50 4111 20 18 no odor I no sheen <br /> 08/31199 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 16 <0 50 4549 2506 no comment <br /> 12!09199 140 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <50 200 <0 50 4704 2661 <br /> 02/21/00 140 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 190 <0 50 4547 2504 no odor!no sheen <br /> 05/18/00 <100 <1 0 <t 0 <1 0 <1 0 <1 0 <1 0 <1 0 <1 0 12 <100 <10 no no 4071 2028 no odor!no sheen <br /> 09/26/00 64 <0 50 <0 50 <0 50 <0 50 <50 no no no na no na na no 4882 2839 no odor J no sheen <br /> 12/20100 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na no na na 4741 2698 no odor 1 no sheen <br /> 03127101 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na no no na no na na 4619 2576 no odor 1 no sheen <br /> 06126/01 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 16 <0 50 4876 2833 no odor 1 no sheen <br /> 09/05/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no na no na na na no no 5379 3336 no odor 1 no sheen <br /> 11130/01 e5o <0 50 <0 50 <0 50 <0 50 <5 0 no no no na na no no no 5388 3345 no odor 1 no sheen <br /> 02/27/02 <50 <0 50 062 <0 50 <0 50 <5 0 no na na na no na na no 5052 3009 no odor 1 no sheen <br /> 05/16/02 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <50 14 <0 50 5062 21 99 2863 no odor 1 no sheen <br /> 09/12/02 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no no na no na no na na 5857 3658 no odor/no sheen <br /> 12/04/02 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na no na na no na na na 5711 3512 no odor 1 no sheen <br /> 02/17103 57 <0 50 <0 50 <0 50 <0 50 4 50 no no na no no no na na 54 D3 3204 no odor 1 no sheen <br /> 06/02103 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 30 <0 50 5317 31 18 no odor 1 no sheen <br /> 09118/03 ns ns as ns as as as ns as ns ns as ns as am nm not sampled <br /> 11124/03 as ns ns as as AS as ns as ns ns ns ns as 5833 3634 not sampled <br /> 02(23/04 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 22 <0 50 5484 3285 no odor 1 no sheen <br /> 06/07104 ns ns ns as ns ns ns ns ns ns ns ns as ns 5504 3305 not sampled <br /> 09107/04 ns as as ns as ns ns ns ns ns ns ns as ns 61 53 3954 not sampled <br /> 12/10/04 ns ns as ns as ns ns ns ns as ns ns ns ns 5930 3731 not sampled <br /> 419gmro4 els Page 5 of 13 HORIZON ENVIRONMENTAL INC <br /> Prgeo NO 141947 <br />