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DESIGN REQUIREMENTS <br /> Considering the soil data and minimum design requirements of the Septic System Ordinance, our <br /> proposal is as follows: <br /> Construct a Mound System based on an estimated water usage of 750 gallons per day. <br /> 750 gpd x .83 x 110% sq. ft. gppd = 685 sq. Il. bed area-minimum design size. <br /> Proposed Design Size 10' x 69' bed=690 sq. ft. bed area. <br /> 2- 1750 gal. tank <br /> 1- 1250 gal. pump tank <br /> CONS'T'RUCTION PROCEDURE FOR A SEWAGE TREA'1'IVIEN'i' MOOD <br /> Soil Surfaee preparation <br /> A 2 inch discharge pipe ('tont the pump to end of the mound area shall be installed prior to soil <br /> surface preparation, The trench excavated to install the discharge pipe shall be carefully <br /> backlilled and compacted to prevent seepage of'effluent. <br /> 'The total area selected for the mound, including that under the dikes, shall be roughened in order <br /> to thoroughly break up any existing sod layers and to provide a suitable transition zone between <br /> the original soil and the sand layer of the mound. The area shall be roughened only when the <br /> moisture content of the soil 8 inches below the surface is drier than the plastic limit. The plastic <br /> limit is the soil moisture content below which the soil may be manipulated for purposes of <br /> installing u soil treatment system, and above which manipulation will cause compaction and <br /> puddling. Surface preparation or scarification will be performed with a buck-hoe bucket. There <br /> shall be no dead furrow in the mound construction area. <br /> Mound construction shall proceed immediately Mier surface preparation is completed. Every <br /> effort should be taken to prevent rain from falling on the prepared soil surface_ <br /> Construction Materials SI Distribution of Effluent <br /> A clean washed sand layer shall be placed where the tilter(rock bed) material is to be located. <br /> This sand layer must be at least 15-inches deep and should be deep enough to level area for <br /> mound. A tracted crawler tractor with a blade or bucket shall be used to move the sand into <br /> place. At least 6 inches of sand shall be kept under the tracks to minimize compaction of the <br />