SU0001035 SSNL - Laserfiche WebLink

Home Browse Search

a,. 60 Hilvers Residence April 26, 1993 Page 5 CHEMICAL ANALYSIS As part of the conditions for approval an analysis of the water from the private well onsite near the mobile home was requested. The water was sampled from the faucet �. directly at the well head and not from the interior tap of the house. The samples were placed in the appropriate containers, placed on ice and delivered to the laboratory for analysis. The water was analyzed for nitrates and dibromochloropropane (DBCP) . Test results reported 45 mg/1 or parts per million (ppm) of nitrates in the water from the well. No DBCP was detected in the sample obtained. When these results are compared to the Primary Drinking Water Standards established by the Department of Health Services in Title 26 of the California Code of Regulations (CCR) , the levels of nitrates present equal the maximum contaminant ,r level of 45 ppm. Nitrate levels above 45 ppm are known to present a health risk when used for drinking or culinary purposes. A copy of the test results and the chair'-of- custody forms are presented in the appendix. CONCLUSIONS AND RECOMMENDATIONS V The result of our investigation indicates that the soil is suitable for construction of the septic system on the property. There does not appear to be any condition or 6.0 occurrence on the site or in the vicinity that would prohibit the construction of the system. The percolation rate of the site soil is acceptable for septic system construction and should provide adequate percolation for the system. The Soil Conservation Service indicated that because of the highly permeable soil in the area, "community sewage systems may be necessary to prevent contamination of the water supplies as a result of the onsite sewage disposal systems." If a high density of disposal systems were introduced into the area and the septage was released into a i.. concentrated zone, it is possible that the groundwater could be impacted. We recommend that seepage pits be avoided for the disposal of liquid wastes due to the potential for contaminate concentration in isolated areas. Liquid waste should be dispersed over as wide a leach field area as practical, thus reducing the concentration of sewage to one specific area. It should also be noted that all offsets from property lines, wells, and other construction requirements must be maintained. �-' To prevent overload of contaminants into the groundwater, the quantity of sewage systems installed in the area should be limited, and the area over which such systems are installed should be as large as is practical.