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Table 1 <br /> Groundwater Monitoring Data <br /> Former Beacon Station No 419 <br /> 2350 Waterloo Road,Stockton,California <br /> Well Date TPHg Benzene 'Toluene E-benzene Xylenes Depth to TOC GW <br /> Number ug/L ug/L uglL ug/L ug/L GW Elevation Elevation Comments <br /> MW-6; 03/31/98 110 <0 50 <0 50 <0 50 <0 50 4836 2066 -2770 <br /> (scnedlicd 06/10/98 79 <0 50 <0 50 <0 50 <0 50 4268 -22 02 <br /> tnti44-'- 09/08/98 <50 0 86 077 <0 50 <0 50 4697 -2631 no odor/no sheen <br /> aK <br /> 48'-'�jr 12/02/98 2065 Wellhead Survey Data <br /> 12/30/98 53 <0 50 <0 50 <0 50 <0 50 4557 -2492 no odor I no sheen <br /> 03/26/99 84 <0 50 <0 50 <0 50 <0 50 4125 -2060 no odor/no sheen <br /> 06/02/99 59 <0 50 <0 50 <0 50 <0 50 4071 -2006 no odor 1 no sheen <br /> XW-7-w 11/12/98 20 55 Wellhead Survey Data <br /> (41'-66,) 12/30/98 340 48 10 7 4 22 45 43 -2488 no odor/no sheen <br /> "-� 03/26/99 550 94 <0 50 <0 50 <0 50 4133 -2078 no odor/no sheen <br /> 06/02/99 230 <0 50 <0 50 <0 50 <0 50 4076 -2021 no odor/no sheen <br /> yMW^81 11/12/98 20.38 Wellhead Survey Data <br /> J41' 12/30/98 68 12 076 <0 50 081 4536 -2498 no odor/no sheen <br /> 03/26/99 58 <0 50 <0 50 <0 50 <0 50 4108 -20 70 no odor/no sheen <br /> 06/02/99 <50 <0 50 <0 50 <0 50 <0 50 4052 -20 14 no odor/no sheen <br /> MW-9 _ 11/12/98 2065 Wellhead Survey Data <br /> P '(4/'-61)7 12/30/98 1,500 73 18 160 64 4559 -24 94 sl1g4odor/no sheen <br /> 7 _ 0326199 1,300 54 58 110 15 4139 -2074 no odor/no sheen <br /> 06/02/99 1,300 16 25 76 24 4074 -2009 no odor/no sheen <br /> MW I0 _ 12/02/98 2087 Wellhead Survey Data <br /> 12/30/98 180 <0 50 <0 50 <0 50 <0 50 4184 2497 no odor/no sheen <br /> 03/26/99 140 064 <0 50 <0 50 072 4165 -2078 no odor/no sheen <br /> 06/02/99 160 <0 50 <0 50 <0 50 <0 50 4096 -2009 no odor/no sheen <br /> VW-11 03/26/99 260,000 3,000 1,800 9,100 44,000 4158 nm nm no odor/no sheen <br /> '-44 w 06/02/99 84,000 2,000 156,000 5,400 26,000 4092 nm nm slight odor/no sheen <br /> VW-2` 03/26/99 ns ns ns ns ns dry nm nm slight odor/no sheen <br /> (15'-251 06/02/99 na na na na na dry nm nm slight odor/no sheen <br /> Notes <br /> TPHg=total petroleum hydrocarbons as gasoline pg/L= micrograms per titer=parts per billion(ppb) nm=not measured <br /> B=benzene E=ethylbenzene GW=Groundwater na=not analyzed <br /> T=toluene X=xylenes TOC=Top Of Casing =less than indicated detection limit <br /> Depths and Elevations recorded in feet <br /> 99OMTable Q1 Page 2 of 2 HORIZON ENVIRONMENTAL INC. <br />