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100% REPLACEMENT/RESERVE AREA <br />If the replacement area should need to be activated, it can be installed directly north of the primary <br />disposal field, as noted on the plans. The replacement area is to be a square filter bed construction, <br />with the same square footage as the primary filter bed. <br />OPERATIONAL PARAMETERS AND COMPONENTS <br />SSS§ 3.7. The design of the filter bed disposal system is based upon the factors for efficient <br />operation, disposal field longevity, and environmental protection. An overview of the system <br />operation to serve the proposed facility is as follows: <br />Influent from the unisex Restroom will gravity flow into a P&L Concrete, Inc. standard precast, <br />1,200 gallon septic tank. A Polylok, Inc. PL-68 effluent filter is to be installed at the outlet of this <br />tank. Clarified effluent will gravity to a P&L Concrete, Inc. three-hole Distribution box (D-box), <br />where the effluent will be equally distributed between two, 35 ft long leachlines, spaced 10 ft apart <br />and with capped ends. A minimum of 12" of washed drain rock is to be placed under the <br />perforated pipe, extending 2" above the perforated pipe. Geotechnical fabric to be placed over the <br />drain rock and backfilled to grade with native soil. <br />V. CONCLUSIONS AND RECOMMENDATIONS <br />NLS§ 4.1. The nitrate loading calculations show the effluent from the proposed project will have a <br />negligible effect on the nitrate loading emanating from the entire subject parcel. An analysis of the <br />nitrogen content of the adjacent almond orchard soil which comprises almost all of the subject <br />parcel area found that the trees have been efficiently fertilized with nitrogen, as noted: A <br />composite soil sample from five separate locations of the orchard floor found the root zone (0-12 <br />inches deep) soil nitrate-nitrogen content to be 2 ppm vs. 18 ppm under the filter bed area. <br />SSS§ 5.4, 6.8. The soils underlying the proposed filter bed area show a rapid permeability due to <br />the sandy loam (silty sand) soil texture. Applying the effluent uniformly by capping the ends of the <br />two standard perforated leachline pipes and laying them level, thus forcing the application of <br />effluent relatively equally over the filter bed area will allow optimum effluent management by the <br />receiving soils. <br />The application rate was determined from the 10.9 min/in perc rate to be 0.786 gallons/f 2 /day. <br />The filter bed area is to be 740 ft2 of floor area. Therefore, the filter bed can theoretically manage: <br />0.786 gallons/f 2 /day x 740 ft2 = 582 gpd. <br />NLS§ 4.2, SSS§ 6.7. No potential problems are predicted from this proposed Onsite Wastewater <br />Treatment System (OWTS). Equal distribution of effluent will create the best environment for <br />effluent treatment by creating anaerobic microsites in combination with the medium organic matter <br />Page -7- <br />Chesney Consulting