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were either below the STLC or below laboratory detection limits. The concentrations of Halogenated <br /> Volatile Organics were also below laboratory detection limits. Benzoic Acid was reported as having a <br /> concentration of 56 ppb in the sample. According to the EPA, there are no regulatory limits of benzoic <br /> acid in drinking water. <br /> A sample of the onsite drinking water, DM-2, was collected from the lavatory sink. The sample was <br /> analyzed for TPH-g, TPH-d, BTEX, and MTBE and the concentrations were below laboratory detection <br /> limits in each case. The concentrations of the Cam-17 metals were either below the STLC or below <br /> laboratory detection limits. The concentrations of Halogenated Volatile Organics were below laboratory <br /> detection limits. The total fecal coliform and total coliform counts were also below laboratory detection <br /> limits. Benzoic Acid was reported as having a concentration of 51 ppb in the sample. <br /> CONCLUSIONS <br /> Based on the soil and groundwater results collected from the probe location, it appears that residual TPH- <br /> g, TPH-D, BTEX, MTBE, volatile organics or metals are not present in the soil and groundwater samples <br /> collected in the area of the septic tank leach field. In addition, there were no contaminants of concern <br /> present in the drinking water sample collected at the site. Based on this information, it is our opinion that <br /> further investigation or assessment in this area is not necessary. <br /> We trust this information meets your requirements. Please contact either of the undersigned at (408) 451- <br /> 1125 if you have any questions regarding this report or require further information. <br /> Very truly yours, <br /> DAMES &MOORE <br /> Randolph C. Brandt, R.G. <br /> Associate/Senior Hydrogeologist <br /> Gillian Evans <br /> Staff Environmental Engineer <br /> Attachments: <br /> Figure 1 —Site Vicinity Map <br /> Figure 2—Site Plan <br /> Table 1 —Analytical Results <br /> Appendix A— Certified Analytical Results <br /> Appendix B— Soil Boring Log <br /> cc: Harlin Knoll, San Joaquin County Public Health Services <br /> Karen Bassett,Regional Water Quality Control Board <br /> DAMES&MOORE 4 <br />