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09/07/2001 10:96 6842627 DERIENICLAYRAR PAGE 06 <br /> V <br /> Kt,E1NFELDER <br /> The l-lantzsche equation has several limitations when applied to this project. The equation does <br /> telrla erect silts and Y <br /> urtt the large depth to groundwater <br /> or the 120 feet of in y <br /> ... not take rota accv g l? a waste <br /> -underlyizig that site. Bath factor's can contribute significantly to denitrification of th <br /> water. Using Des]gnated Level NlethodologY (DL NI) in acco dan �taberth e California 1�8} for example,Quality Control Board criteria (equation 4 on pad , <br /> assuming an environmental attenuation factor(EAl~) of 100,the nitrate concentration ofnitrified <br /> leach Meld effluent (lbw) would need to be 1,000 mg/1 or greater to effectively increase the nitrate <br /> N of the groundwater above 10 mg/1- The EAF represents an average disposal situation like a <br /> landfill in the alluvium of the Central Valley with a significant depth(i.e., 15 to 50 feet) of soil <br /> catitaining appreciable and continuous clay or silty-clay strata betweezi the base of the landfill <br /> and groundwater. Accordingly, we conclude that placement of 14 residential structum on the <br /> a 31.5 acre site should not cause a rise of nitrate levels above State standards. <br /> LIENS <br /> The conclusions of this report are based on the infonnation provided regarding the existing and <br /> proposed development and on the site conditions. It was assumed that the percolation test result <br /> is 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 /> f with the standard of care that exists in San Joaquin County_ No other guarantee or warranty, <br /> expressed or implied is made. <br /> Respectfully submitted, <br /> KLEIN )alt F,IL - ^� <br /> G H. 1 h,CE., ' d CNS <br /> [ S ar eer <br /> GHG:lr <br /> 20-4476-o I.Govxoaa R 8 z3 <br /> September 14.2000 <br /> OD 2000 Kicinfelder, Inc. Page 5 or 5 <br />