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Clear Light Moderate Heavy <br />Debris Code: CL <br />•No observable <br />debris <br />Code: DL <br />•Minor <br />amount of <br />debris <br />•15 minutes <br />or less to <br />clean <br />•1 pass <br />Code: DM <br />•Less than 5 <br />gallons of debris <br />per line segment <br />•15-30 minutes to <br />clean <br />•2-3 passes <br />Code: DH <br />•More than 5 gallons of <br />debris per line segment <br />•More than 30 minutes to <br />clean <br />•More than 4 passes <br />•Operator concern for <br />future stoppage <br />Grease Code: CL <br />•No observable <br />grease <br />Code: GL <br />•Minor <br />amounts of <br />grease <br />•15 minutes <br />or less to <br />clean <br />•1 pass <br />Code: GM <br />•Small “chunks” <br />•No “logs” <br />•15-30 minutes to <br />clean <br />•2-3 passes <br />Code: GH <br />•Big “chunks” or “logs” <br />•More than 30 minutes to <br />clean <br />•More than 4 passes <br />•Operator concern for <br />future stoppage <br />Roots Code: CL <br />•No observable <br />roots <br />Code: RL <br />•Minor <br />amounts of <br />roots <br />•15 minutes <br />or less to <br />clean <br />•1 pass <br />Code: RM <br />•Thin stringy roots <br />•No “clumps” <br />•15-30 minutes to <br />clean <br />•2-3 passes <br />Code: RH <br />•Thick roots <br />•Large “clumps” <br />•More than 30 minutes to <br />clean <br />•More than 4 passes <br />•Operator concern for <br />future stoppage <br />Other: <br />Pipe wall <br />fragments <br />Soil/dirt/ <br />rock <br />Code: CL <br />•No observable <br />materials <br />Code: OL <br />•Specify <br />material (if <br />possible) <br />•Minor <br />amounts of <br />material <br />Code: OM <br />•Specify material <br />•Less than 5 <br />gallons of <br />material per line <br />segment <br />Code: OH <br />•Specify material <br />•More than 5 gallons of <br />material per line segment <br />•Operator concern for <br />future stoppage <br />This table was adapted from Best Practices Manual: Hydroflush Cleaning of Small Diameter <br />Sewers, California Collection System Collaborative Benchmarking Group, February 2001. <br />Observation of Results <br />IV-26.2.A. - Page 71