SU0008552 SSNL - Laserfiche WebLink

Home Browse Search

Leachline Equivalent Requirement= 1,200 gallons BTC + 810 ADF x 0.250 clay Soil Factor= 503 lineal feet of leachline (LFLL) required. Installation Requirements: (� Four-40 ft Leachlines, two ft wide= 160 ft Four- 4 ft diameter seepage pits,25 ft deep (90 If Equivalent Length) = 4 x 90 =360 It 160 ft+360 ft= 520 LFLL > 503 LFLL. The proposed operation of the wastewater management system is as follows: Graywater from [, (� sinks in the Kitchen, all floor drains, and the Feet Wash Area will flow into a traffic-rated 1,200 �f gallon grease trap tank located in the first Handicap Parking stall. Effluent from this grease trap tank will flow into a traffic-rated 2,000 gallon septic tank,to be installed in the second Handicap Parking stall. Influent blackwater from the Restrooms will flow into this septic tank. Specifications for these two tanks are found in Appendix B. A Polylok Tm effluent filter must be installed on the outlet tee of the septic tank. Effluent from the septic tank will then will gravity flow north to a distribution box (D-box) at the SEC of the primary disposal area. The D-box must be level and installed with Tuff-Tite® Speed LevelersTM to achieve optimum effluent distribution. Equalized effluent will gravity flow west and then north into four-40 ft leachlines with a seepage pit at the end of each leachline. The attached Plans of the septic system illustrate this orientation. V. CONCLUSIONS, RECOMMENDATIONS, MONITORING AND MAINTENANCE SSS§5.4, SSS§6.7. The soils underlying the proposed wastewater disposal area for the proposed / Hindu Cultural and Community Center show acceptable permeability at the shallower depths down CS \ to approximately 8 ft,but poor permeability at the deeper depths representative of seepage pits. J Regarding long-term acceptance rates, the permeability of the soils will slow due to biomat formation within the leachline trenches and seepage pits. Given the historical evidence of the repairs/replacements/additions to surrounding septic systems in the Morada area, longevity of the proposed system may not be as great as in other areas of the County. However, as referenced, rising effluent within the seepage pits will eventually encounter the permeable stratum around eight ft below grade, thus contributing to longevity. NLS§ 4.2. From the soil chemistry test results and the percolation test results, it is important to force the soils in the leachline trenches to manage effluent flows. The micropore spaces within the Cy y� fine soil texture will create anaerobic micro-sites thus promoting denitrification. As noted on the septic system plans, an increase in tightline pipe elevation from the leachline pipe will force the effluent to remain in the leachline trenches, until saturation/biomat formation forces the effluent into the seepage pits. NLS§ 4.1, SSS§ 6.8. Well water analysis reveals a very low nitrate concentration at 4 ppm as nitrate. The calculated nitrate concentration in the percolating effluent has been determined to be 14 ppm nitrate. Additionally, placement of the rainwater retention basin theoretically down gradient from the wastewater disposal area may add a dilution effect to effluent traveling in the top mixing C(o. l layer of the water table. 11