water-wastewater-construction

# Water and Wastewater Construction Quick reference for construction project managers working on water treatment plants, wastewater treatment plants, pump stations, and related utility infrastructure projects. ## Facility Types Quick Reference | Facility Type | Typical Capacity | Key Characteristics | Typical Duration | |---------------|------------------|---------------------|------------------| | Water Treatment Plant | 1-100+ MGD | Surface/groundwater treatment, filtration, disinfection | 24-48 months | | Wastewater Treatment Plant | 1-100+ MGD | Primary/secondary/tertiary treatment, biosolids | 24-60 months | | Water Pump Station | 100-50,000+ GPM | Booster, raw water, well stations | 12-24 months | | Wastewater Pump Station | 100-20,000+ GPM | Lift stations, force main, submersible/dry pit | 12-24 months | | Water Storage | 0.1-20+ MG | Ground, elevated, prestressed concrete | 12-24 months | | Water Reclamation | 1-50+ MGD | Tertiary treatment, advanced oxidation, reuse | 24-48 months | **Reference:** [Facility Types Overview](references/facility-types-overview.md) | [Water Treatment Plants](references/water-treatment-plants.md) | [Wastewater Treatment Plants](references/wastewater-treatment-plants.md) ## Water Treatment Processes Quick Reference | Process | Application | Typical Loading | Key Equipment | |---------|-------------|-----------------|---------------| | Coagulation/Flocculation | Particle removal | G=20-80 s⁻¹ | Rapid mix, flocculators | | Sedimentation | Solids settling | 0.5-1.0 gpm/SF | Tube settlers, scrapers | | Filtration | Particle/pathogen removal | 2-6 gpm/SF | Media filters, underdrains | | Membrane Treatment | Advanced treatment | 15-50 GFD | MF, UF, NF, RO systems | | Disinfection | Pathogen inactivation | CT based | Chlorine, UV, ozone | **Reference:** [Conventional Treatment](references/conventional-water-treatment.md) | [Membrane Treatment](references/membrane-water-treatment.md) | [Desalination](references/desalination-facilities.md) ## Wastewater Treatment Processes Quick Reference | Process | BOD Removal | Nutrient Removal | Typical SRT | |---------|-------------|------------------|-------------| | Conventional Activated Sludge | 85-95% | Limited | 3-5 days | | Extended Aeration | 90-98% | Nitrification | 20-40 days | | MLE (BNR) | 85-95% | TN 70-80% | 10-20 days | | A2O | 85-95% | TN/TP removal | 10-20 days | | MBR | 95-99% | Excellent | 10-25 days | | SBR | 85-95% | Good flexibility | 15-30 days | **Reference:** [Activated Sludge](references/activated-sludge-process.md) | [MBR Systems](references/mbr-membrane-bioreactor.md) | [SBR Systems](references/sbr-sequencing-batch-reactor.md) | [Water Reclamation](references/water-reclamation-reuse.md) ## Pump Station Quick Reference | Type | Configuration | Typical Pumps | Redundancy | |------|---------------|---------------|------------| | Raw Water Intake | Vertical turbine, wet pit | 2-6 pumps | N+1 | | Water Booster | Horizontal split case, VFD | 2-4 pumps | N+1 | | Wastewater Lift | Submersible non-clog | 2-3 pumps | N+1 | | Large Wastewater | Dry pit, vertical | 3-6 pumps | N+1 | | Stormwater | Axial flow, submersible | 2-4 pumps | N+1 | **Reference:** [Water Pump Stations](references/pump-stations-water.md) | [Wastewater Pump Stations](references/pump-stations-wastewater.md) | [Lift Stations](references/lift-stations.md) ## Storage Facilities Quick Reference | Type | Typical Capacity | Materials | Key Considerations | |------|------------------|-----------|-------------------| | Ground Storage | 0.5-10 MG | Prestressed concrete, welded steel | Mixing, coating, cathodic protection | | Elevated Storage | 0.1-2 MG | Steel (pedestal, multi-column) | Foundation, erection sequence, coating | | Clearwell | 0.1-5 MG | Cast-in-place concrete | CT baffling, tracer testing | | Buried Reservoir | 1-20+ MG | Prestressed concrete | Flotation, waterproofing | **Reference:** [Storage Tanks/Reservoirs](references/storage-tanks-reservoirs.md) | [Clearwells](references/clearwells-contact-basins.md) | [Elevated Tanks](references/elevated-storage-tanks.md) ## Process Equipment Quick Reference | Equipment | Application | Key Specifications | Lead Time | |-----------|-------------|-------------------|-----------| | Blowers | Aeration | 3,000-30,000 SCFM, turbo/PD | 16-24 weeks | | Diffusers | Oxygen transfer | Fine bubble, 9" disc | 8-12 weeks | | Clarifier Mechanisms | Solids collection | Torque rated, SS/FRP | 12-20 weeks | | Chemical Feed | Treatment chemicals | Diaphragm/peristaltic pumps | 8-12 weeks | | Dewatering | Biosolids | Belt press, centrifuge | 20-32 weeks | | UV Disinfection | Pathogen inactivation | Dose validated, LP/MP | 16-24 weeks | **Reference:** [Aeration Systems](references/aeration-systems.md) | [Blowers/Diffusers](references/blowers-diffusers.md) | [Chemical Feed](references/chemical-feed-systems.md) | [Biosolids](references/biosolids-handling.md) ## Disinfection Systems Quick Reference | Method | Application | CT/Dose | Safety Considerations | |--------|-------------|---------|----------------------| | Chlorine Gas | Large WTP/WWTP | CT based | RMP/PSM >2,500 lbs, scrubber required | | Sodium Hypochlorite | Most facilities | 12.5% typical | Degradation, storage life | | On-Site Generation | Medium facilities | 0.8% NaOCl | Salt storage, hydrogen venting | | UV | WW effluent, tertiary | 40-100 mJ/cm² | Lamp disposal, UVT monitoring | | Ozone | Advanced treatment | CT based | Class I Div 1, off-gas destruct | **Reference:** [Chlorination](references/disinfection-chlorination.md) | [UV Disinfection](references/disinfection-uv.md) | [Ozone](references/disinfection-ozone.md) ## Concrete and Coatings Quick Reference | Application | Standard | Key Requirements | |-------------|----------|------------------| | Liquid-Retaining Structures | ACI 350 | w/c ≤0.45, extended curing, waterstops | | Potable Water Contact | NSF/ANSI 61 | Certified coatings only | | Wastewater Structures | ACI 350 | Corrosion-resistant coatings | | H2S Environments | — | Calcium aluminate, epoxy novolac | | Buried Structures | — | Waterproofing, cathodic protection | **Reference:** [Water-Retaining Concrete](references/concrete-water-retaining.md) | [Coatings/Linings](references/coatings-linings-corrosion.md) | [Hydraulic Structures](references/hydraulic-structures.md) ## Controls and Instrumentation Quick Reference | System | Application | Key Standards | |--------|-------------|---------------| | SCADA/PLC | Plant automation | ISA-101, cybersecurity | | Flow Measurement | Process monitoring | ±1-2% accuracy | | Level Control | Basins, tanks, wet wells | Ultrasonic, radar, pressure | | Process Analyzers | Water quality | DO, pH, turbidity, chlorine | | Electrical Hazardous Areas | Digesters, wet wells | NEC 500/505, Class I Div 1/2 | **Reference:** [Instrumentation](references/instrumentation-analyzers.md) | [SCADA/PLC](references/scada-plc-controls.md) | [Process Control](references/process-control-narratives.md) | [Hazardous Locations](references/electrical-hazardous-locations.md) ## Regulatory Framework Quick Reference | Regulation | Agency | Application | |------------|--------|-------------| | Safe Drinking Water Act | EPA/State | Water treatment plants | | Clean Water Act / NPDES | EPA/State | Wastewater discharge permits | | Ten States Standards | GLUMRB | Design criteria (multiple states) | | State Primacy | State DEQ/DOH | Design approval, operating permits | | Consent Decree | Court/EPA | Compliance schedule requirements | **Reference:** [EPA/NPDES](references/epa-npdes-permits.md) | [SDWA](references/safe-drinking-water-act.md) | [CWA](references/clean-water-act.md) | [State Agencies](references/state-primacy-agencies.md) | [Consent Decrees](references/consent-decree-compliance.md) ## Funding and Delivery Quick Reference | Funding Source | Interest Rate | Key Requirements | |----------------|---------------|------------------| | Clean Water SRF | 1-3% | AIS, Davis-Bacon, environmental review | | Drinking Water SRF | 1-3% | AIS, Davis-Bacon, environmental review | | WIFIA | Treasury rate | Large projects >$20M, credit assistance | | USDA RD | Varies | Rural communities, grants available | **Reference:** [SRF/WIFIA Funding](references/srf-wifia-funding.md) | [Design-Build](references/design-build-water.md) | [Progressive DB](references/progressive-design-build.md) ## Commissioning Quick Reference | Phase | Activities | Duration | |-------|------------|----------| | Pre-Functional | Equipment inspections, installation verification | 2-4 weeks | | Functional | Individual equipment testing, loop checks | 4-8 weeks | | Process | Clean water testing, process introduction | 4-12 weeks | | Biological Startup | Seeding, acclimation, MLSS development | 4-16 weeks | | Performance Testing | Capacity, efficiency, permit compliance | 2-4 weeks | **Reference:** [Commissioning/Startup](references/commissioning-process-startup.md) | [Biological Startup](references/biological-process-startup.md) | [Performance Testing](references/performance-testing-acceptance.md) | [Phased Startup](references/phased-startup-live-facilities.md) ## Safety Quick Reference | Hazard | Standard | Key Controls | |--------|----------|--------------| | Confined Space | OSHA 1910.146 | Permit, atmospheric monitoring, rescue | | H2S/Methane | OSHA PEL 10 ppm H2S | 4-gas monitor, ventilation, LEL monitoring | | Chlorine Gas | RMP/PSM | Scrubber, SCBA, leak detection | | LOTO | OSHA 1910.147 | Energy isolation, verification | | Biological | — | PPE, hygiene, vaccinations | **Reference:** [Confined Space](references/confined-space-water-wastewater.md) | [H2S/Methane](references/hazardous-atmospheres-h2s-methane.md) | [Chlorine Safety](references/chlorine-safety.md) | [LOTO](references/loto-process-equipment.md) | [Biological Hazards](references/biological-hazards.md) ## Stakeholder Management | Stakeholder | Primary Concerns | Meeting Frequency | |-------------|------------------|-------------------| | Utility Owner/Operator | Operations continuity, training, O&M | Weekly |