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L June 20,2006 NOA Project Number: E06038A Page 2 Category Total People Average Quantity per Average Daily Flow per Day Person Per Pa cel / Customer-- 45 Fri-Sun gpd/customer (45 customers*3 50 customers*5/7) 9 d/ _ �GT Restaurant 50 Thurs-Mon *9 gpd/customer=495 gpd Customer— * r 3 C 350/event,4 d 65 _ Major Special events/year 3 gpd/customer 350 customers /3 3 gpd= 12 gpd;,' /6,S Event T5 0? Customer—Minor 50/event,42 3 gpd/customer 50 customers*42/369*3 gpd=33 gpd Special Event events/year Total AveraLe Daily row-r�M Note —gpd is gallons per day;2/7,3/7,and 5/7 are conversions for limited work weeks;4/365 hk convers n for four events per year;42/365 is a conversion for 42 events per year. For the subject property,the total daily waste water quantity is 842 gallons per day. iQQ aGta The nitrate loading scenario presented in Section 3.5 of the NLS is modified as follows: Sy �� Table 2,Additional Scenario Summary of Nitrate Mass Balance Analysis. Result Acres Average Daily Effluent Concen- Leachfield Deep Percolation of (Nc)* (A) Flow(Q) (Table 1) tration(Nw) Denitrifi- Rainfall(R) (mg/L-N) (gpd) (mg/L-N) cation(d) (Plate 3) (in.) 4.1 1 22.8 842 50 25% 5.31 * b =num contaminant level(MCL) for nitrate in drinking water is 10 mg/ISN. The result of the nitrate loading balance indicates that the proposed use should not cause a buildup of nitrate in the ground water above 10 mg/L-N over the long term. According to the Hantzsche and Fe mernorczgttatia and approach, there is a potential for a buildup of nitrates in the ground water to 4.1 mg/L-N. Because to proposed use should not cause a buildup of nitrates in the groundwater above the safe drinking water standard,no mitigation measures are warranted. Our office concludes that the Site is suitable for development with a standard septic system. All septic system construction should follow the San Joaquin County On-Site Wastewater Disposal Standards where applicable. Our professional services were performed,our findings obtained, and our conclusions proposed in accordance with generally accepted engineering principles and practices. This warranty is in lieu of all other warranties either expressed or implied. Test findings and statements of professional opinion do not constitute a guarantee or warranty, expressed or implied.