Date 06/25/2021
W/O 901261
Weather Dry
Operator/Surveyor S. LOPEZ
Sewer ID Z00742
PipeID P18960
Time 3:40 AM
Certificate U-0720-70309212
System Owner 1
Date Cleaned —
Pre-Cleaning No Pre-Cleaning
Media Label K9007
Sewer Name 20 TRUNK "A"
City PALMDALE
Loc. details Light Highway
Location Code C
Use of Sewer Sanitary Sewer
District District 20
Page No. 03
Purpose Routine Assessment
Project RFIR_WO_901261_TV20063_JUL2021
Sewer Type Gravity
Material Reinforced Concrete Pipe
Shape Circular
Height 30 in.
Width 30 in.
Upstream MH 20 0038
Downstream MH 20 0039
Dir. of Survey Upstream
Length Surveyed 7.7 ft.
Total Length 7.7 ft.
Structural Index 0
Structural Quick 0000
Structural Rating 0
O&M Index 3
O&M Quick 4131
O&M Rating 11
Overall Index 3
Overall Quick —
Overall Rating 11 Pipe schematic from manhole 20 0038 to 20 0039 MH: 20 0038 MH: 20 0039 upstream 0 ft. DSZ - Deposits Settled Other, 20 %of cross sectional area, from 04 to 08 o'clock, , within 8 inches of joint: YES - DEBRIS/SLUDGE 0 ft. MSA - Survey Abandoned - DUE TO DEBRIS/SLUDGE 0 ft. DAGS - Deposits Attached Grease, 5 %of cross sectional area, from 12 to 12 o'clock, , within 8 inches of joint: YES, Finish 5.7 ft. DAGS - Deposits Attached Grease, 5 %of cross sectional area, from 12 to 12 o'clock, , within 8 inches of joint: YES, Start 5.7 ft. MGO - General Observation - SLOW OCCASIONAL "DRIPPING" OBSERVED DURING THIS LIMITED (ABANDONED) SURVEY FROM 11 - 1 O'CLOCK. POSSIBLY DUE TO CONDENSATION / AGGREGATE FALLING /...). 7.7 ft. AMH - Downstream Manhole, Survey Begins - 20 0038 7.7 ft. MWM - Water Mark, 70 %of cross sectional area 7.7 ft. MWL - Water Level, 40 %of cross sectional area Observation photos (3) 2 ft. - Deposits Attached Grease, 5 %of cross sectional area, from 12 to 12 o'clock, , within 8 inches of joint: YES, Start
7.7 ft. - Deposits Settled Other, 20 %of cross sectional area, from 04 to 08 o'clock, , within 8 inches of joint: YES - DEBRIS/SLUDGE
7.7 ft. - Survey Abandoned - DUE TO DEBRIS/SLUDGE