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Central Valley Baptist Church Page 3 of 6 <br /> Our Project Number: E07125A <br /> July 31,2007 <br /> system. Water softener brines are not acceptable for disposal in the septic system. <br /> Please call our office or EHD for more information regarding suitable waste streams. <br /> Also, please see our To';and Dontsnguide for commercial septic systems attached to <br /> this letter. <br /> Calculating Flow and Measuring Available Surge Volume <br /> Based on the r ults of th�SS/N , the maximum peak use for the si <br /> be approxim ely 436 gallons day. This number was derived in a SS/NLS <br /> addendum I er (NOA, 200 Based on the EHD sizing criteria, a to I of 328 feet of <br /> leach line will or the proposed uses at the church facility. <br /> Calculation for Determining Liable Cellulose Volume <br /> The ratio between nitrate and required carbon was determine using the chemical <br /> relationship for denitrification: <br /> 4NO3 +5CH20 + 4H+ —> 2N2 (g) + 5CO2 (g) + 71-120 <br /> Using stoichiometry, a weight ratio of 4.130 of Nitrate (NO3) to Carbon (C) was <br /> calculated. <br /> It was determined that approximately 424 pounds of nitrate would be generated at the <br /> facility in a 30 year period requiring approximately 1752 pounds of cellulose (woodchips <br /> or sawdust). Using a density of 10 pounds per cubic foot for loose sawdust and <br /> including a factor of 1.5 to account for uneven mixing and non-cellulose impurities of <br /> wood, approximately 8 yards of woodchips or sawdust will be required for <br /> placement into the bottom of three (3) of the four (4) trenches during construction. <br /> This is in addition to applying 4 inches of loose compost in the bottom of the three <br /> trenches. The fourth trench will be used as a standard type trench for comparison <br /> purposes and will not require carbon amendments (no wood or compost). Please refer <br /> to the plans for dimensions of the disposal trench. <br /> Septic Tank Volume <br /> Due to EHD concerns regarding pote ' se of the facility, the septic tank <br /> volum reased to an ow 11 primary to k retenti io of 4.6"ba the <br /> mat long- rm average flo of 436 gpd. nerall , a primary tank ratio of th <br /> (3) to five (5 considered satisfactgry. <br /> Please refer to the attached plans for additional septic tank details and layout. <br /> 902 Industrial Way-Lodi,CA 95240■209.367.3701 -Fax 209.369.4228 02007 Neil O.Anderson&Associates,Inc. <br />