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AGE prepared the attached calculation of waste typically used for septic tank and bio mat loss from <br /> waste. Are these acceptable? <br /> NW Residential = Total nitrogen concentration of wastewater at 45 mg/L-N based on the average <br /> discharge. Accounting for the loss of mg/L-N in the septic tank at 15% 45-15%= 38.255 and the loss <br /> from the biomat at 10% 38.25 - 10% = 34.425 mg/L-N <br /> NW church restrooms = Total nitrogen concentration of wastewater at 85 mg/L-N based on the <br /> average discharge. Accounting for the loss of mg/L-N in the septic tank at 15% 85-15% = 72.25 and <br /> the loss from the biomat at 10% 55.25 - 10% = 45.25 mg/L-N <br /> NW church kitchen = Total nitrogen concentration of wastewater at 45 mg/L-N based on the average <br /> discharge. Accounting for the loss of mg/L-N in the septic tank at 15% 45-15% = 38.25 and the loss <br /> from the biomat at 10% 38.25 - 10% = 34.425 mg/L-N <br /> William Little <br /> California Professional Geologist#7473 <br /> Advanced GeoEnvironmental, Inc. <br /> Environmental • Industrial Hygiene • Geotechnical • Contracting <br /> Phone: 800-511-9300 <br /> Fax: 888-445-8786 <br /> rmarty(a)advgeoenv.com <br /> www.advqeoenv.com <br /> This email/fax message is for the sole use of the intended recipient(s) and may contain confidential <br /> and privileged information. Any unauthorized review, use, disclosure or distribution of this email/fax is <br /> prohibited. If you are not the intended recipient, please contact the sender by email/fax and destroy <br /> all paper and electronic copies of the original message. <br /> From: Frank Girardi [EH] [mailto:fgirardi(absicehd.com] <br /> Sent: Thursday, February 19, 2015 2:15 PM <br /> To: William Little <br /> Cc: Rodney Estrada [EH] <br /> Subject: 11075 W Larch Rd Nitrate Loading Study SR0071012 <br /> Bill, <br /> I have comments for the NO3 study as follows: <br /> 1. Nr results of 0.126 ppm (SFR)appears to be inaccurate,very low figure. May need to recalculate. <br /> 2. The Nw NO3 concentrations of 45 ppm for church restroom is too low, should be 85 ppm.Also 34 ppm for <br /> SFR and church kitchen are too low, should be 45 ppm. <br /> 3. The 6 BD ADF if 320 gpd to too low, should be 720 gal/day. <br /> Please revise NO3 study and resubmit for approval, Please contact me if you have questions. Thanks. <br /> Frank Girardi, Lead Senior REHS <br /> San Joaquin County Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton,CA 95205 <br /> (209)468-3420 <br /> 4 <br />