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i 0 ! <br /> TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Former Beacon Station No 12419 <br /> 2350 Waterloo Road,Stockton,Callfornla <br /> ethyl Depth to TOC GW <br /> Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA [meanol e]thanol EDC EDB GW Elevation Elevation <br /> Number Date (ug1L) (ug1L) (ug/L) (ug1L) (ug1L) (ug1L) (ugJL) (ug1L) (uglL) (ugly) /L) JL) (ug1L) (u /Q (feet) (feet sea level) (feet sea level) Comments <br /> AS 1 02/21100 80000 7600 16000 1600 9100 34 <20 <2 0 <20 <20 380 12000 180 250 4589 nm <br /> screened 05118100 23000 2300 4800 480 2900 < nm slight odor/no sheen <br /> 10 410 410 410 4100 41000 x100 na na 41 09 nm no odor/no sheen <br /> interval 09126100 54000 2600 5300 590 3200 <50 na no no no no na na no 4913 <br /> 64 69 12/21/00 52000 5000 10000 1200 6000 <500 no no na na no no no no 47 79 nm slight odor lno sheen <br /> 03'27!01 140000 16000 34000 3300 18000 4500 no na no no no na no na 4665 nm odor/no sheen <br /> nm odorino sheen <br /> 06126101 14000014000 34000 3700 18000 <1 0 <1 0 <10 <1 0 <10 <100 <1D0 83 140 4979 nm odortno sheen <br /> 09105/01 210000 17000 39000 4600 25000 <500 no na no no no no no no 5441 nm odortno sheen <br /> 11/30101 150000 12000 32000 4000 19000 42000 no no na no no na na no 5470 nm odorino sheen <br /> AS 2 10/20100 29006 140 16DO 650 3100 <0 50 <0 50 <0 50 <0—50 ,5 0 <50 610 11 63 41-52 2076 2076 <br /> screened 12'21100 18000 120 12DO 530 2800 <50 na no no na no no na na 45 98 <br /> Interval 03/27/01 11000 91 820 236 1800 < 25 22 slight odor;no sheen <br /> 20 no na no na no no na na 4651 2575 slight odor'no sheen <br /> 123 128 06126101 12000 80 68 220 2000 <2 5 <25 <2 5 <2 5 <25 <250 <50 <2 5 50 4925 2849 slight odor'no sheen <br /> 09!05!01 7400 75 31 140 1100 <20 no no no no no no no no 5329 3253 slight odor!no sheen <br /> 11/30101 6600 70 15 110 740 <25 no no na no na no no no 5415 <br /> 3339 odorino sheen <br /> AS 3 10!20!00 450 <050 <0 50 <0 50 <0 50 <050 <0 50 <0 50 <0 50 <5 0 <50 81000 <0 50 <0 50 4607 20 60 2547 <br /> screened 12121/00 <50 <0 50 <0 50 <050 <0 50 <50 na na na na no no no na 4805 2745 no odor 1 no sheen <br /> Interval 03127101 <50 23 58 <0 50 <0 50 <50 na no no no na no na na 4682 2622 no odor!no sheen <br /> 80 85 06/26/01 <50 <0 50 052 <0 50 <050 <D 50 <0 50 <0 50 <0 50 12 <50 690 89 <br /> <0 50 4896 <br /> 2836 no odor 1 no sheen <br /> 09105101 100 <050 <0 50 <050 1B <0 na no no no no na na no 5411 3351 odor/no sheen <br /> 11130101 74 13 <0 50 <0 50 <0 50 <50 na no no no no no no na 5393 3333 odorhq sheen <br /> Notes TPI{6—total petroleum hydrocarbons as gasoline TBA=ten bmanol GW=groundwater ntn=not measured <br /> MTBE=methyl tert butyl ether EDC=ethylene dtchlonde TOC=top of casing na=not analyzed <br /> DIPE=dusopropyl ether EDB=ethylene dtbrommde <m less than indicated reporting limit ns=not sampled <br /> ETRE=ethyl tea butyl ether pg/L= micrograms per Iger=pans per billion(ppb) <br /> TAME=ter[amyl methyl ether <br /> 419r1rnffi1 its <br /> 141944 Page 7 of 7 HORI7ON ZNV[RGNMZ"AL INC <br />