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Finished grade -tO" <br />Top of tank-lFT~O" <br /> <br />Pump ~io~t of~ -5~T S' <br /> <br />oO0 <br /> <br /> Bottom oF filter <br />I TOp of d~in rock +7" <br />J Top of filter sand <br />K TO~ oF manifold +3FT2" <br />L Top of drain reck +3FT <br /> <br />Or.infield ' ' <br /> <br />N1 Finished ~ade <br /> <br />N3 Bottom o~ trench <br /> <br />OD Bo~om o~ trench -~FT~TM <br /> <br />P2 8otto~ of dr~in~l~ld li~e <br /> <br /> <br />