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N.W� In KLEINFELDER <br /> 8. CONCLUSIONS <br /> As shown above, we calculate 0.7 mg/1 of nitrate-nitrogen(N) in groundwater resulting from <br /> the proposed leach fields, a result that is far below the state standard of 10 mg/1.Base3—on this <br /> relatively low level of nitrate-nitrogen, we anticipate that the impact on surrounding wells will <br /> be minun ear ree is a nearest natural water body to the site as it cuts through proposed <br /> Parcel 4. Based on the very low nitrate-nitrogen levels calculated we anticipate that the impact <br /> to water bodies will be minimal. <br /> b. <br /> The results of our percolation tests indicate that a suitable soil percolation stratum exists at each <br /> test location at depths of between 3 and 3 '/2 feet below existing site grade. A suitable soil <br /> i.. condition for septic percolation tests is defined as a stratum capable of percolating water at a <br /> rate of 60 minutes per inch (min/inch) at a depth of up to 3.5 feet below existing site grade. <br /> Based on these results, it is our professional opinion that the proposed septic tank/leach trench <br /> sewage disposal systems should adequately serve the proposed residences. We do not <br /> anticipate the need for an engineered or alternative septic system. <br /> 9. LINIITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing <br /> development and on the site conditions. It was assumed that the percolation test results are <br /> representative of the subsurface conditions in the general area. <br /> This completes the scope of work requested. Our work was performed in general accordance <br /> with the standard of care that exists in San Joaquin County. No other guarantee or warranty, <br /> r expressed or implied, is made. <br /> Respectfully submitted, <br /> L Q�nFESS/p,{� <br /> KLEINFELDER, ��C LOpr ty Reviewed by' of /p <br /> O ! <br /> L No.64089 <br /> w EAP.9-06 y T 83 2 2 <br /> Zb <br /> -05 a <br /> O <br /> Ronald u ser, C. �r9 b CIVIL L* Pv <br /> b. Staff Professio al SCF CAS\F� eo cal D J P <br /> OF CA,S\E <br /> L REL:lr <br /> Attachments <br /> L <br /> L <br /> `, 37050.G01/ST03RI750 November 20,2003 <br /> 0 2003 Kleinfelder,Inc. Page 6 of 6 <br />