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Sep 08 98 11 : 20a Feil Anderson (209) 333-8303 p. 3 <br /> n <br /> Sutter Home Winery Nitrate Loading Study <br /> ! Page No. 2 <br /> Free ground water was first encountered in the test holes at approximately the 9 foot depth. <br /> The water then rose in the test holes and stabilized ata approximately the 6 <br /> pp y foot depth. The water was <br /> purged out of each test hole several times and then a ground water sample was obtained. Ground <br /> water samples were submitted to the laboratory and tested for the presence of nitrate. The results <br /> of the four test produced an average nitrate reading of 1]3 mg/1 (tests results are attached) for the <br /> existing ground water. This level is well above the Maximum Contaminate Level(MCL)of 45 mg/l. <br /> III NITRATE LOADING STUDY <br /> The nitrate study is based on a simple mass balancer formula which takes into account site <br /> soil conditions and the proposed application of waste effluent. Assumptions and calculations for the <br /> analysis are contained on the attached Nitrate Loading Calculations sheet. Due to high groundwater <br /> conditions a 100%percolation of all rainwater was assumed. The results of the analysis indicates <br /> a potential increase in ground water nitrate concentration of 6.3 mg/1. This potential increase is <br /> below the commonly accepted drinking water limit of 10 mg/1 and well below the MCL of 45 mg/l. <br /> IV LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing <br /> and proposed development, the use of the subject property, and the site conditions as they existed <br /> at the time we excavated our test holes and performed the ground water tests. It was assumed that <br /> t ' the test holes and ground water tests are representative of the subsurface conditions in the general <br /> area. <br /> Our professional services were performed, our findings obtained, and our conclusions <br /> proposed in accordance with generally accepted engineering principles and practices. This warranty <br /> is in Iieu of all other warranties either expressed or implied. Test findings and statements of <br /> professional opinion do t constitute a guarantee or warranty, expressed or implied. <br /> BytOf�SSI�,y� <br /> vj.ANp �c�y Very truly yours, <br /> sCPO <br /> ''° NEIL O. ANDERSON & ASSOC., INC. <br /> Igo. F145 <br /> 102 <br /> 12, <br /> C '�@ �.,� Nei . Ande n, President <br /> Attachments: �` � Ct.tt�0 otechnical Engineer 2245 <br /> Location Maps, a es I and 2 <br /> Boring Logs, PIates 3 through 6 <br /> Nitrate Loading Calculations, 1 page <br /> Laboratory test results, I page <br /> Of AS <br /> P 0 <br /> � N <br /> Z w <br /> d ti <br />