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i <br /> November 3, 2005 <br /> NOA Project Number: E05123A <br /> 6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site Wastewater Disposal <br /> Standards where applicable. <br /> {– 7.0 CONCLUSIONS <br /> r <br /> In summary, the ro osed se tic area a ears suitable for an en eered se tics stem ince the <br /> P�P P Pp J p Y �____Y._ — <br /> _percolation rates failed to meet EH_D minimum standards. We recommend a Civil Engineer prepare <br /> a septic system design-for the proposed parcel unless additional percolation testing, performed <br /> under EHD oversight, achieves a satisfactory rate. Our office has been contracted by the client to <br /> prepare engineered septic system drawings for the property, they will follow this report shortly. <br /> No ground water was encountered in an of the borings drilled on the property. The depth to <br /> gr Y g <br /> ground water was found to be approximately 90 to 100 feet below the ground surface for the period <br /> of Fall 1998 and Spring 1999 based on the San Joaquin County Ground Water Maps. The on-site <br /> water well was-116sted-for nitrate and DBCP. DBCP was non-detectable in the water sample. Nitrate <br /> was found at113.9 mg/L-NO3,below the MCL of 45 mg/L-NO3. <br /> 8.0 LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing and <br /> proposed development, the use of the subject property,and the site conditions as they existed at the <br /> time we excavated our test holes and performed the percolation tests. It was assumed that the test <br /> holes and percolation test results are representative of the subsurface conditions in the general area. <br /> Our professional services were performed, our findings obtained, and our conclusions proposed in <br /> accordance with generally accepted engineering principles and practices. This warranty is in lieu of <br /> all other warranties either expressed or implied. Test findings and statements of professional <br /> opinion do not constitute a guarantee or warranty, expressed or implied. <br /> NEIL O.ANDERSON&ASSOC., INC. <br /> F <br /> U N ncy Ros ek, B.A. David J. Welch,M.Sc. <br /> - Project Manager CEG-2151, CHG-653, GP-1049 <br /> Environmental Division Manager <br /> DG <br /> 4P o. 2 51 �y <br /> - v CERTIFIED � <br /> ENGINEERING <br /> 10 tfj, GEOLOGIST <br /> '9T <br /> FQF CA <br /> f <br /> f <br />