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ti <br />PENCIL <br />MARKS <br />M <br />YY <br />MANHOLE <br />INLET <br />'"`' d... SCUM <br />OUTLET <br />• <br />r '� ;OUTLET LEVEL <br />SCUM CLEAR SPACE <br />-_ <br />CLEAN OUT TANK WHEN: <br />"A" I S 3" OR LESS OR <br />B <br />"B" IS 12" OR LESS <br />BLACK COLOR <br />• �� <br />SLUDGE <br />DISTINGUISHES SLUDGE <br />LAYER FROM LIQUID <br />MEASURE SCUM AND SLUDGE ACCUMULATIONS <br />IN "rHE SEPTIC TANK <br />