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� • TA� 1 <br /> GROUNDWATER MONITORING 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 EDC EDB GW Elevation Elevation <br /> Number Date (ug7L) u L) (ug1L) (ugll-) (ug1L) (ug1L) (ug/L) (ug1L) (ug1L (ug1L) (ug1L) (u L) (ug1L) (ug1L) (feet) (feet sea level) (feet sea leve!) Comments <br /> MW-5 03/31198 75 <0 50 <0 50 <0 50 <0 50 <60 no no na no no no no no 4846 2043 2803 <br /> screened 06110198 <50 <0 50 <0 50 <0 50 <0 50 <50 no na no no no no no na 4272 -2229 <br /> interval 09!08!98 <50 12 091 <0 50 094 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na 4692 2649 no odor I no sheen <br /> 48 71 11/12/98 as as ns ns ns ns as ns ns as as ns ns ns ` 2043 wellhead survey <br /> 12/30/98 110 067 <0 50 <0 50 <0 50 <50 no no no no no no no no 4545 2502 no odor!no sheen <br /> 03/26199 67 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 So <50 <50 <20 no no 4126 -2083 no odor!no sheen <br /> 06/02799 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 71 <0 50 4061 -2018 no odor!no sheen <br /> 08131199 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 16 <0 50 4549 -2506 no comment <br /> 12109!99 140 <0 50 <0 So <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <60 <50 <5 0 200 <0 50 4704 2661 <br /> 02121100 140 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 190 <0 50 4547 -2504 no odor!no sheen <br /> 05118!00 <100 -10 <1 0 <S 0 0 0 <1 0 <1 0 <1 0 <1 0 12 <100 <10 no no 4071 2028 no odor!no sheen <br /> 09126/00 64 <0 50 <0 50 <0 50 <0 50 <50 no na no na no no na no 4882 -2039 no odor 1 no sheen <br /> 12/20/00 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no nano na no no na no 4741 -2698 no odor!no sheen <br /> 03/27/01 <50 <0 50 <0 50 <0 50 <0 50 <50 no no no na na na no no 4619 -2576 no odor I 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 <50 16 <0 50 4870 2833 no odor 1 no sheen <br /> 09105/01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no no na no no no no na 5379 -3336 no odor 1 no sheen <br /> 11130101 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no no no no no no no no 5388 -3345 no odor!no sheen <br /> 02/27/02 <50 <0 50 062 <0 50 <0 50 <50 no na no na no na no no 5052 -3009 no odor 1 no sheen <br /> 05/16102 <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 2199 -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 no na 5857 3658 no odor I no sheen <br /> 12104102 <50 <0 50 <0 50 <0 50 <0 50 <5 0 no na no na na no no na $711 -3512 no odor I no sheen <br /> 02117103 57 <0 50 <0 50 <0 50 <0 50 <0 50 no no no no na no no no 5403 3204 no odor 1 no sheen <br /> MW-6 03/31798 110 <0 50 <0 50 <0 50 <0 50 <5 0 no na no na no no na no 4836 2066 2770 <br /> screened 06710798 79 <0 50 4050 <0 50 <0 50 <5 0 no no no no no no no no 4268 -2202 <br /> interval 09106!98 <50 086 077 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 no no 4697 2631 no odor 1 no sheen <br /> 48 71 5 11/12/98 as its as ns ns ns ns as as ns ns ns as ns 2065 wellhead survey <br /> 12/30198 53 <0 50 <0 50 <0 50 <0 50 <50 no no na no no no no na 4557 -2492 no odor 1 no sheen <br /> 03126199 84 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 no no 4125 -2060 no odor 1 no sheen <br /> 06102/99 59 <0 50 <0 50 <0 50 <0 50 -050 <0 50 <0 50 <0 50 <50 <50 <5 0 <0 50 <0 50 4071 -2006 no odor 1 no sheen <br /> 08131199 63 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 <0 50 <0 50 4557 2492 no comment <br /> 12709/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 <0 50 <0 50 4729 -2664 <br /> 02121!00 690 29 120 20 87 <0 50 <0 50 <0 50 <0 50 <50 <50 20 1 1 16 4569 -25 04 no oda 1 no sheen <br /> 05/18100 <50 <0 50 23 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 no no 4094 -2019 no odor 1 no sheen <br /> 09126100 <50 <0 50 <0 50 <0 50 <0 50 no na no no no no no no no 4892 -2827 no odor!no sheen <br /> 12/20100 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na no no na no no no 4761 -2696 no odor 1 no sheen <br /> 03!27101 <50 <0 50 066 <0 50 <0 50 <50 no no na no na no no na 4639 -2574 no odor 1 no sheen <br /> 06/26101 <50 <0 50 <0 5o <0 50 4 50 <0 50 <0 50 <0 50 <0 So <50 <50 <5 0 18 <0 50 4896 -2831 no odor 1 no sheen <br /> 09105101 64 055 <0 50 <0 50 086 <5 0 na no no no na na no no 5409 -3344 no odor 1 no sheen <br /> 11!30101 87 <0 50 <0 50 <0 50 <0 50 <50 no no no na no na no no 5408 3365 no odor I no sheen <br /> 02/27/02 93 <0 50 <0 50 <0 50 <0 50 <5 0 no na no no no no no no 5081 3016 no odor I no sheen <br /> 05716/02 86 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <50 <0 50 <0 50 5095 2221 2874 no odor 7 no sheen <br /> 09/13102 110 <0 50 <0 50 <0 50 <0 50 <5 0 na na no no na no na no 5897 3676 no odor 7 no sheen <br /> 12/04/02 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na no no no na no na na 5733 -3512 no odor 7 no sheen <br /> 02/17/03 as ns ns as ns ns ns as ns ns ns ns ns ns 5421 -3200 no access <br /> 419q=02 As <br /> P"ad No 1419 45 Page 3 of 7 HORIZON ZNVIRONNZNTAL 1ZIC <br />