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t <br /> MASE 1 HYDROCGEOI-OCTC !NVES11GATiON <br /> w� 4491 IV=Durham Petry Road,Tracy,California <br /> Delta Project No.4491-732 <br /> Page 6 <br /> VV <br /> TABLl12 <br /> Results of PID Fi;:ld Screening <br /> am 1 tin PM h(he a0 PID reading fnoml <br /> MW-2-5 5 120 <br /> MW-2-10 10 94 <br /> MW-2-15 15 110 <br /> MW2-20 20 20 <br /> MW-3-5 5 3 <br /> NM-3-10 10 l <br /> - MW-3-20 20 4 <br /> The soil samples submitted for chemical analysis were collected from a depth of 5&et from monitoritlg we'll <br /> MW-2 and 10 feet from monitoring well MW-3. The soil samples were analyzed for total ootre!eum <br /> hydrocarbons as gasoline and diesel and BTEX using FPA Method 8260. <br /> The chemical result of the soil samples are presented in Table 3. Laboratory data sheets are presented in <br /> Appendix D. Chemical analyses of the soil sample collected from monitoring well M'h'-2 at a depth of <br /> 10 feet, indicated the presence of benzene, toluene, and xylenes at concentrations of 0.013, 0.018 and <br /> _.' 0.02 ppm, respectively. Chemical i�,,Uts of the soil sample collected from monitoring well MW-3 at a <br /> depth of 5 feet below the ground surface indicated the chemicals analyzed were below the laboratory's limit <br /> of detection. <br /> 3.6 Ground Water ChemistrX - <br /> On September 4, I99I,each monitoring well was purged by removing three well casing volumes of water <br /> from each well. Ground water samples were then collected from each monitoring well and were sent to the <br /> laboratory for analysis of TPH as gasoline and diesel and BTEX using EPA Method 82.60. Ms. Eleanor <br /> -- Ratliff from the County was on site to observe the sampling protocols duringthe ground ova cr sampling event. <br /> PH100 .BP <br />