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To 1 #. <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No 12474 <br /> 3440 East Main Street,Stockton,California <br /> ethyl- total Depth to TOC GW <br /> Well TPHg benzene toluene benzene xylenes MTBE RIPE ETBE TAME TBA methanol ethanol DCA EDB GW Elevation Elevation <br /> Number Date (ug/ u 1L u 1L Jug/L)( (ug/L (ug/L u 1L u IL u 1L (ug/L (ug/L u 1Ll(ug/L) u1L feet feet msl feet msQ Comments <br /> MW-12 10/26/99 81000 3200 17000 3100 17000 <2 0 <2 0 <2 0 <20 <20 <50 46000 <50 66 6351 2579 -2772 no odor 1 no sheen <br /> screened 03103100 70000 2800 13000 2000 11000 59 <50 <50 <50 <500 <0 50 36000 <200 <50 5563 -2984 no odor 1 no sheen <br /> Interval 06/22/00 87000 2600 14000 2400 13000 <20 <20 <20 <20 <200 <2000 39000 30 <20 5464 -2885 no odor I no sheen <br /> 84-89 09!28100 68006 7500 3300 2200 7700 <200 no no no no no no no no 5649 -3070 slight odorino sheen <br /> 121221D0 27000 750 4700 190 5500 <200 no no no no no na no no 5632 <br /> 3053 odor lno sheen <br /> 03128101 67000 2400 11000 2100 12000 e200 no na no no no no no no 55 20 -2941 odor/no sheen <br /> 06127101 93000 5800 15000 2900 16000 <50 <50 <50 <50 <500 <5000 60000 240 <50 5645 -3066 odor lno sheen <br /> 09/06/01 80000 7100 9500 2400 13000 <250 no na no no no no no no 5830 3251 odor lno sheen <br /> 12104!01 81000 6000 6200 2500 11000 <100 no no no no no no no no 5916 -3337 odor lno sheen <br /> 03101!02 69000 5900 5500 2000 9500 <250 no no no no no na no no 5803 -3224 odor I no sheen <br /> 0512Q102 43000 4700 3700 830 5700 <25 <25 <25 <25 <250 <2500 41000 440 <25 5829 2775 3054 odor!no sheen <br /> 08130/02 38000 4700 3300 860 4500 <200 no no no no no no no no 6103 -3328 odor!no sheen <br /> 12106!02 27000 3400 2600 220 4300 <20 no na no no no no no no 6151 -3376 odor lno sheen <br /> 03107!03 54000 6200 4800 940 8400 <250 na no no na no na no na 6093 -3318 odor 1 no sheen <br /> 06/03/03 28000 2800 2200 57 4400 <10 <10 <10 <10 <100 <1000 <600 <10 <10 5999 3224 odor 1 no sheen <br /> 08129/03 76000 4300 3600 2000 10000 <100 no no no no no no no no 6142 3367 no odor 1 no sheen <br /> 11/25/03 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6248 -3473 not sampled <br /> 03!01104 78000 6100 5200 2700 12000 <10 <10 <10 <10 <100 <1000 <200 140 <10 6123 2568 -3555 odor lno sheen <br /> 06108/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6156 -3588 not sampled <br /> 09109!04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6332 3764 odor 1 no sheen <br /> 12/08/04 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 6338 -3770 not sampled <br /> 03!11105 52000 4200 2500 1 4000 6200 <10 <10 <10 <10 <100 <1000 <400 130 <10 6225 -3657 odor!sheen <br /> 05!25105 ns ns ns ns ns ns no ns ns ns ns ns ns ns 6101 -3533 not sampled <br /> I <br /> 474gmr45 As <br /> Project No 1474 48 Page 12 of 18 HORIZON ENVIRONMENTAL INC <br /> 1 <br />