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;• _ . • II PENCIL <br /> I <br /> MARKS <br /> a �•\r. •y. .•t, t \ •-mac t'20 <br /> y MANHOLE <br /> • � _ _ «.,}Sr q't'r 11.3 • la �• •.. - - <br /> _ INLET _ SCUM .._�-```_ _ t ,i OUTLET. <br /> " LEVEL • ,Q,.. •- ;' li• :"• <br /> • , �.�rsOUTLET - ate- I ., • . <br /> SCUM CLEAR SPACE= i CLEAN OUT TANK WHEN <br /> --• .-! _.I _ . " „ IS OR LESS OR <br /> g B" IS 12 OR 'LESS <br /> •• _• BLACK COLOR <br /> • DISTINGUISHES. SLUDGE <br /> SLUDGE <br /> ,::: •-� • : _ :�:` LAYER FROM LIQUID- <br /> AT <br /> IQUID- <br /> .. ••ft�\t r Jif t•+j•• ' _ - - � - <br /> t� .�!tf•�,�••` .a.• _ . — ...: •�''t:� '" //' . _ .. <br /> ATMEASUREMUL IONS,: <br /> .y t 1N THE SEPTIC." TANK <br />