Laserfiche WebLink
November 30,2007 <br /> NOA Project Number: :unmimary <br /> 92A <br /> Table 2. <br /> of Nitrate Mass Balance Analysis. <br /> Result Average Daily Effluent Leachfield Deep <br /> Acres Flow(Q) Percolation of <br /> Parcel (Nc)* Concentration(Nw) Denitrification <br /> (m ) (A) (Table d)3) (� g/L-� (d) (Plate 9) (inall )) / <br /> 1 13.7 35 1 1,861 gpd 85 15% 3.3 <br /> * Maximum cpintaminant level(MCL) for nitrate in drip ter is 10 mg/L- <br /> 3.6 Impact of Nitrate Loading to Nearby Water Sources <br /> Since the Site is relatively flat,we do not foresee percolating effluent affecting any surface water <br /> resources. <br /> 4.0 DISCUSSION OF NITRATE LOADING RESULTS <br /> 4.1 Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading balance indicates <br /> that the prop pment on the proposed parcels could cause a build up of nitrates in the <br /> aquifer abov 10 mg/L- <br /> 4.2 Methods of Mitigation <br /> An engineered septic system which mitigate nitrate leve will be required to mitigate the/ <br /> ' <br /> p <br /> potential impact to ground water. <br /> 5.0 CONCLUSIONS AND RECOMMENDATIONS = <br /> Our office concludes that the Site is suitable for development with the use ofeptic. <br /> The design of the engineered septcvi systm should be prepared by a qualifie profession and <br /> stamped buy a civil engineer required by the San Joaquin EHD. The percol 'on tests were <br /> satisfactory and do not require any special mitigation. <br /> jNo and water was found during the drilling a percolation test hole to a minimum depth of 3.5 <br /> e .All system construction should follow the San Joaquin County On-Site Wastewater Disposal <br /> Standards where applicable. <br /> 5.1 Signatures <br /> The signatures of the environmental professionals involved in the preparation of this report can be <br /> found on the cover sheet at the front of this package. <br /> 8 <br />