10-REQ-0007862 Supporting Documentation.pdf
PDF 51 KB Posted
- Solicitation number
- REQ - 0007862
- Issued by
- Wayne County, Michigan
About this file
This supporting documentation file is a technical assessment prepared by Jacobs for the Great Lakes Water Authority (GLWA) Wastewater Reclamation and Recycling Facility (WRRF), detailing water uses and piping systems across multiple buildings and complexes. The document provides a comprehensive inventory of secondary water demands throughout the facility, organized by building location with average daily demand measurements in gallons per minute (gpm). The assessment identifies specific water uses including pump seal water, motor cooling, flushing water, mist elimination systems, and various specialized applications across 20 primary locations plus additional unnumbered uses. Piping materials documented include ductile iron (DI), galvanized steel (Galv), copper, and stainless steel (SS), with associated components such as wye strainers, pressure reducing valves, and solenoid valves. The document was prepared under the Rehabilitation of SFE Pump Station project and specifically identifies heat exchangers and water heaters that were not known during the original design phase.
The document emphasizes critical operational considerations for secondary water systems, including water quality requirements and treatment needs for sensitive equipment such as cooling condenser units and bearing systems. Demands range from zero gpm at decommissioned facilities to 282 gpm at Influent Pump Station No. 1. The assessment notes that certain systems, including the existing SFE Pump Station, will be taken out of service following new facility implementation, while other systems such as dry polymer and raw liquid polymer systems are currently inactive. The document references source information from Standard Operating Procedures (SOPs), site visits, email correspondence, and engineering drawings, providing a detailed baseline for the Third-Party Design Review of the Screened Final Effluent Project.
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Text version
Building Name
Avg Day
Demand
(gpm) a
Use Piping
Material
Other Components
(other than fittings and valves)
Comments / Source of Info
1 Complex I Machine Shop 0 None DI
2 Dewatering Complex II 173 Dilute Polymer Mixing Tanks C1 and Upper
Level Belt Filter Presses
Will stay on PW through HPSW
Seal water for dewatering and filter feed pumps
DI / SS from John Clark email
AHU-4 Cooling Condenser Unit (4th Floor
C-II Dewatering)
DI / Galv Water is used for in the condenser. There is a
Notice is the manual that “The use of untreated or improperly treated water in this unit could result in scaling, erosion, corrosion, algae or slime.
3 Pump Station No. 1 Rack and Grit 35 Flushing water DI / Galv
4 Influent Pump Station No. 1 282 Motor bearing cooling (Kingsbury bearing)
Copper Solonoid valves Uses IPSW; can also use HPSW, according to SOP
Pump seal water DI SOP Photo
Polymer system (in PUB; not used)
5 Incineration Complex 200 Mist elimination system (C-II) Will stay on HPSW
6 Machine Shop 15 See Complex I Machine Shop above
7 Blower Building (Decomissioned).
Not visited
97.1 Blowers out of service since about 2004.
8 Infuent Pump Station No. 2 97.1 Raw Sewage Pump seal water Copper Solonoid valves, pressure reducing valves
Flushing water in Screen Room DI
New screens will use LPSW in Screen
Room
The demand for the screens is included in the SFE BOD
Dry Polymer System (Not used) SOP indicates SFE is used
Raw liquid polymer system (Not used) SOP indicates liquid polymer system not used
9 SFE Pump Station (Existing) 44.7 Pump seal water Will be taken out of service after new SFE Station
9A SFE Pump Station (Proposed) --- No uses in the building; however, there are pressure sustaining valves
DI Pressure sustaining valves
10 Electrical Building No. 9 (Near AD-
3)
25.5 Could not find uses in EB-9. There are SW
and PW water lines in the basement
11 Sludge Pump Station No. 1 22.3 Pump seal water (w/ booster pumps) Copper Wye strainers; PRV
(Singer)
Flushing water Galv
12 Sludge Pump Station No. 2 22.3 Pump seal water (w/ booster pumps) Copper Wye strainers; PRV
(Singer)
Flushing water Galv
Sludge Pump Station No. 3 0 Pump seal water Copper wye strainers SPS-3 is included in Tble 2-4, but the demand is listed as 0
Shell and tube heat exchanger for (4) liquid drives
Galv
Flushing water Galv
13 Sludge Processing Complex A 20.1 GT Pump seal water Mostly SS;
Galv on incoming line and other locations
Wye strainers; pressure reducing valves
SST Pump seal water Galv
Flushing Water Galv
USES AND PIPING SYSTEMS FOR LPSW AND IPSW AT THE GLWA WRRF
The order of Buildings in this table is based on the Table 2-4 of the Secondary Water Demands in the Yard Piping Basis of Design. The first 20 uses are ones that had a demand greater than 0 gpm.
Other unnumbered uses at the bottom of the table represent those that were idenfitied during this evaluation.
This document prepared by Jacobs under Rehabilitation of SFE Pump Station project at the request of Noresco
Highlighted items represent heat exchangers and water heaters that were not known by Jacobs during design phase.
14 Influent Pump Station No. 1 / Rack and Grit Complex
15.6 See Influent Pump Staton No. 1 above.
See Pump Station No. 1 Rack and Grit
15 Final Clarifiers 1-25 13.4 each RAS Pump seal water Stainless and galv
Wye strainers; pressure reducing valves from SOP photo and site visit
16 Sludge Processing Complex B 10 Pump seal water (Gland water) Stainless and galv
Wye strainers; pressure reducing valves
Site visit
17 Intermediate Lift Station No. 2 240 Motor cooling Did not observe heat excangers during site visit; 2 pumps running and water flowing to all 3 cooling systems
Seal water
18 Praxair Metering Station 6.7 Did not observe any SW near Praxair
Metering Station
19 Intermediate Lift Station No. 1 160 Motor cooling Did not observe heat excangers during site visit
Seal water
20 Pump Station No. 1 Ferric Building
(Demolised in about 2024)
4.5 Replaced with new facility at PS-2
PS-1 Screening Building --- Service water (Flushing water)
Conveyor wash (?)
Rectangular Primary Sludge
Pumps
--- Pump seal water Copper
Flushing water Mostly DI, some galv
Scum Concentrator Building (for
Rectangular Clarifiers)
10 (3) Hot water heaters Galv and copper
Wye strainers on cold water feed line
Provides hot water to Scum Houses 1-7 for cleaning
CDM Demand table indicates 0 gpm demand - this is incorrect
Conquest PVI water heaters: Brochure indicates "Aqua-
PLEX tank is resistant to aqueous corrosion." Brochure also indicates Aqua-PLEX tanks is an "unlined duplex alloy."
Scum Houses 1-7 0 Scum wash down and conveyance DI
Scum Buildings 9 to 14 for
Circular Clarifiers
Hot water heaters
(2) WHs ea. in Bldgs 9, 10, 11, 12, 13.
(1) WH ea. Bldgs 8 and 14.
copper From PC-740 drawings and site visit
Manufactured by PVI
Central Air Compressor Building Not included
Air and Oil Cooling SOP states that secondary water is used to cool the air after each stage of compression, and to cool the oil used to lubricate the compressors.
Footnotes:
a. Demands from Table 2-4 of Yard Piping BOD
File details come from the government source that posted it. Updated .