Laserfiche WebLink
i A <br />{ <br /> I <br /> A Sutter Homes Winery <br /> Page No. 7 <br /> The estimated nitrate level of the processed waste effluent is anticipated to be <1 parts <br /> per million (ppm) nitrate as NO3. This value was provided by the client and was obtained from <br /> laboratory results measuring essentially the same processed waste material from an identical <br /> pond design of a waste stream at a Sutter Home facility in Lodi (see analysis attached in <br /> appendix). The level of< i ppm nitrate as NO3 is essentially equivalent to < 1 mg/L nitrate as <br /> FNO3. Nitrate levels in rain water were found by Hantzshe and Finnemore (199 1) to range <br /> x between 0.5 to 1.0 mg/l nitrate as NO3.4 Both the treated effluent and rain water are about 45 <br /> � times less then the maximum contaminant drinking water standard of 45 mg/L nitrate as NO3- <br /> 1 ! <br /> FVII CONCLUSIONS <br /> Based on the results of the study, it is our opinion that the subject property is suitable for <br /> I ' use of an on-site sewage disposal system. The system should be an engineered design to address <br /> -the low percolation rates of 480 minutes/inch and maintain a minimum of 5 feet above high <br /> ground water levels. We understand that the design and performance of the system will be <br /> + F. discussed in a separate report and will be designed to contribute"0" level increase of nitrate to <br /> ground water and will be verified by testing groundwater obtained from down gradient <br /> monitoring wells. This system should be properly designed and installed according to current San <br /> F. Joaquin County criteria. <br /> The treated winery waste stream will be used to irrigate grape vineyards on the property. <br /> F The nitrate level of the waste stream is essentially equivalent to rain water therefore it will not <br /> increase nitrate levels in the ground water. <br /> I <br /> � VIII LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the <br /> existing and proposed development, the use of the subject property, and the site conditions as <br /> they existed at the time we excavated our test hole and performed the percolation test. It was <br /> assumed that the test hole and percolation test results are representative of the subsurface <br /> conditions in the general area. <br /> 4 Hantzshe N.N., Finnemore, E.J. 1991, Predicating Ground-Water Nitrate-Nitrogen impacts. Ground <br /> FWater Vol. 30,No. 4. <br /> I c�°ERr0 <br /> y <br /> 3 w <br /> f 4isOrc. <br /> 5 <br /> J1 <br /> f <br />