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7Atuncture, the 2 inch PVC tubing will be encased in a protective three-inch galvanized steel the PVC tubing extends 40 feet on the surface of the water-side of the levee shoulder. The zed steel piping will protect the PVC tubing, and with both ends open, if the PVC tubing is compromised, escaping wastewater can be readily observed. The two-inch PVC tubing will then exit the west end of the galvanized steel tubing and enter a 2.5- inch PVC protective outer tubing. This two-inch PVC sewage transport tube inside the 2.5-inch PVC protective tube will then traverse through an existing six-inch diameter steel tube that crosses the levee. There are two existing steel tubes crossing the levee, one tube to protect the sewage tubing transporting sewage to the septic tank and ultimately to the mound system. The second tube protects the freshwater Schedule 80 PVC piping transporting domestic water from the existing well at the schoolhouse to the Bullfrog facility. This Schedule 80 PVC water piping will also be encased in a protective 2.5-inch flexible PVC tube. The wastewater PVC transport tube will daylight the steel tube, then be buried 18 inches on the land-side of the levee. A 2.5-inch PVC "T"must be installed on both the 2.5-inch PVC wastewater transport tubing and 2.5-inch PVC tubing encasing the fresh water supply line. These observation tubes must be inspected weekly.t1f waAdWater is observed inside the 2:5-inch outer tubing, or�if �.. fresh=water is observed inside the freshwater PVC outer tubing, then the transport tubing/piping has ?been breached withiri _ _ M1µ w the levee .and must be immediatelyArepaired After the observation tube in the wastewater transport line, the tubing will increase in diameter from a two-inch line to a four-inch line to extend approximately 30 feet from the septic tank. This expansion will reduce the energy of the pumped influent before it enters the.new,2,000 gallon, standard septic tank:� ID s .EHtaff"regui"res this standard tank°instead of.a inonolithic.tank because �! ) ,there is an internal-baffle that-gives greater structural.integrity to the tank. There is a six-inch hole in this baffle in the "clear-zone." Effluent from this new tank will then gravity into 450 gallon pump chamber(Quanics PN: SS-25-T). A duplex turbine effluent pump system (Quanics PN: P- TE-30) will then alternately distribute the effluent to the mound system. The mound system will be constructed with a center-feed manifold, with three laterals, each 31 feet long on either side of the manifold, for a total lineal feet of lateral length of 62 x 3 = 186 feet. A. SEPTIC TANKS AND DOSING PUMP CHAMBER There are two existing, 1,200 gallon septic tanks to the north of the schoolhouse, and two existing �3•-!/3s�, 1,200 gallon tanks to the east of the schoolhouse. All four tanks will be pumped under EHD permit, and abandoned with sand backfill in accordance with EHD Sewage Standards Section 3.4. A new 2,000 gallon septic tank will be installed in the location denoted on Page 1 of the Site Plans for this project. Septic tank data is found in Appendix F. A 450 gallon pump chamber will be 3 � installed after the new septic tank to accept effluent gravity flow from the 2,000 gallon tank and ' store it before being pumped to the mound system, 13 Chesney Consulting