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. . ` . <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 shaii be kert under the tracks to minimize compacti�» c,f the <br /> scarifcd Iayc,. The sand layer upan which thc fih�,mate;ial ss piacc;� st�att be Iev�t frc�cn sicic ta <br /> side and end to enci. �nly clean sanci is t� be usec�. A deptl� of at least 9 inches of clean rock 1 <br /> 1/4 inch diameter to 2 1/2 inches in diameter, shatt be ptaced on the sand layer priar to instatting <br /> the distribution pipe. <br /> Pressure Q�stributectn <br /> Effluent shall be distributed�ver the filter material by a 2 inc;h cii�rteter perfqr�ted pipe unaer <br /> pressurc;. Pertoration hates shat( be ii4 inch in diameter driE[c;d iti a straight lin�alang tii� Ieilgth <br /> of the pipe. Hole spacing shal} be 36 inches. Holes shall be drilled straight into the pipe and not <br /> at an �n�le. A �h�m driil sh�ll be used �ne� �ny bunrs in th� inside or otttsid� nf the �ipe �hali be <br /> remove:i. The pc;rfarated pipe laterals sha!! t�c instailec! icvcE with tltc �;rfaratians downwarc�. <br /> 1'he pert�rated pipe taterals shall be cannected to a 2 inch diatneter cj�anitofd pipe and sf�afl Isave <br /> their ends capp�d. The lat�rals shall be spaced no further th�n 4Q inches an c�nt�r and na further <br /> than 24 ii�clies feort� tfze ecige of fhe tilter ttlaterial. <br /> The manifold pipe shall be connected to the supply pipe from the pump. Tlie manifold shall be - <br /> s2o�ed to.��ard the �um�fQ�eotnptete drai�hack of effl�ent. <br /> Pumn �n� Catlectian Ta�k <br /> A pump shali he used to cieliver et�uent tQ the �naunc�. The pusn�shalt he cast iron c�r hr4rtze <br /> �tted with stainless steei screws or constructed ot'other wvE���e�, ciurable and cor�vsion-resistant <br /> materials. LacatiUn c�f pump tank and septic tank can be �ptional du� to the us� of a pressurized <br /> moacid. <br /> An alarm device shall be instalied to�varn of pump fai�ure. The dosing chamber will be sizec� for <br /> a minimum of 2 days of restricted use due to amaunt of daily use. <br /> Pum� Dischar�e <br /> The p��mp d�sch2r�e�apaczty is t�ase� on t_h_�perforati�n spacing ar�d �erfc�rat��n d�amcter. T[zi� <br /> system has individual IdteraZ lengti�s�f 28 feet; laterats wil! t�e at least [ If2 inch ��astic pipe <br /> with l�`4 inch perforations spaced 3fi-inet�es aparl. This size �nour�d wi[[ require 6.7b (;PM per <br /> 100 square feet of bed area. A 23 GP.M minimum pump discharge capacity is rec�uired. The <br /> pueii�disc;harge head sl�all be at least 5 feet greater tt�a« the t��ad r�quired to ovecce��t.� tt�c pipe <br />