Chlorinated Bilge Water Tank Selection

Chlorinated Bilge Water — Bulk Tank Selection at Shipyard Wet-Dock Bilge Reception, Dockside Bilge Slop Holding, Naval-Base Engine-Room Discharge, Cruise-Line Port-Reception Service, and Marine Repair-Yard Bilge Pumpout Operations

Chlorinated bilge water (engine-room bilge slop — a mixed waste stream of seawater leakage + lubricating-oil emulsion + diesel-fuel residue + cooling-water leakage + cleaning-chemical residue + condensate from machinery spaces — chlorinated at typically 1-10 ppm free-chlorine residual via sodium-hypochlorite or calcium-hypochlorite dosing for biofouling control + microbial-suppression at shipboard or dockside reception) is the dominant pumpout-reception chemistry at North American shipyard + cruise-line + naval-base + commercial-vessel bilge-reception service. Storage envelope is concentrated at HDPE rotomolded vertical and horizontal atmospheric tanks at the 500-10,000-gallon scale at the dockside or shipyard reception facility ahead of the oily-water-separator (OWS) treatment train.

U.S. and Canadian chlorinated bilge water reception throughput is concentrated at major shipyards (Newport News Shipbuilding, Bath Iron Works, Electric Boat Groton + Quonset Point, BAE Systems Ship Repair Norfolk + San Diego + Mobile + Jacksonville + Hawaii, NASSCO San Diego, Bollinger Lockport + Amelia, Eastern Shipbuilding Panama City, Vigor Shipyards Portland + Seattle, Detyens Charleston, Colonna's Norfolk, Marisco Hawaii), naval bases (Norfolk Naval Shipyard, Puget Sound Naval Shipyard, Pearl Harbor Naval Shipyard, Portsmouth Naval Shipyard, Mayport, San Diego, Jacksonville, Pearl Harbor, Bremerton, Kings Bay), cruise-line port reception (Port Miami + Port Everglades + PortMiami + Port Canaveral + Galveston + New Orleans + Long Beach + Seattle + New York), commercial-vessel bilge-pumpout service (Crowley, Foss Maritime, Kirby Inland Marine, Marine Spill Response Corporation, regional bilge-pumpout vendors), and U.S. Coast Guard yards across the U.S. and Canadian coastal industrial base.

The eight sections below cite USCG VGP and VIDA 33 USC 1322(p) framework + MARPOL Annex I oily-water + IMO MEPC.107(49) Oily Water Separator framework + 33 CFR 151 oily-mixture discharge + 40 CFR 110 oil-discharge framework + 40 CFR 122 NPDES + ASTM D7321 fuel-water-separator framework + ASTM D1248 polyethylene tank specification + EPA SPCC framework (40 CFR 112) + state DEP wastewater + state coastal-zone-management framework + routine operating practice at North American shipyard + cruise-line + naval-base bilge-reception service.

1. Material Compatibility Matrix

Chlorinated bilge water at 1-10 ppm free-chlorine residual is a mixed waste-stream chemistry (seawater + oil emulsion + chlorine residual + dissolved organics + suspended solids) at typical pH 6.5-8.5. The chlorine residual is the dominant compatibility-driver at most engineering plastics + elastomers, with chloride content driving stainless-steel pitting + crevice-corrosion concerns at sustained exposure.

The dominant industrial pattern at North American shipyard + cruise-line + naval-base bilge-reception is HDPE or XLPE rotomolded vertical atmospheric tank in the 500-10,000-gallon range for the dockside reception holding ahead of the oily-water-separator (OWS) treatment train, combined with FRP at the largest dockside reception installations and duplex 2205 or super-duplex 2507 at the OWS pump and high-chloride transfer wetted parts. OneSource Plastics' 5-brand HDPE network (Norwesco, Snyder Industries, Chem-Tainer, Enduraplas, Bushman) covers the standard atmospheric reception envelope at marine + dockside scale.

2. Real-World Industrial Use Cases

Major U.S. Shipyard Wet-Dock Bilge Reception. Newport News Shipbuilding (Newport News VA), Bath Iron Works (Bath ME), Electric Boat (Groton CT + Quonset Point RI), BAE Systems Ship Repair (Norfolk + San Diego + Mobile + Jacksonville + Hawaii), NASSCO (San Diego), Bollinger (Lockport LA + Amelia LA), Eastern Shipbuilding (Panama City FL), Vigor Shipyards (Portland OR + Seattle WA + Ketchikan AK), Detyens Shipyards (Charleston SC), Colonna's Shipyard (Norfolk VA), Marisco Hawaii operate bilge-pumpout reception holding from drydock + wet-dock vessel arrival at HDPE 1,000-10,000-gallon scale ahead of the captive oily-water-separator + treatment train. Typical bilge volume 500-5,000 gallons per vessel arrival; chlorinated to 1-5 ppm free-chlorine residual to suppress microbial growth in the holding tank ahead of OWS feed.

U.S. Naval Base and Coast Guard Yard Bilge Service. Norfolk Naval Shipyard (Portsmouth VA), Puget Sound Naval Shipyard (Bremerton WA), Pearl Harbor Naval Shipyard (Pearl Harbor HI), Portsmouth Naval Shipyard (Kittery ME), Naval Station Mayport (FL), Naval Base San Diego (CA), Naval Station Jacksonville (FL), Naval Station Pearl Harbor (HI), Submarine Base Bangor (Bremerton WA), Submarine Base Kings Bay (GA), plus U.S. Coast Guard yards (Curtis Bay MD, Alameda CA, Honolulu HI, Cleveland OH, Portsmouth VA) operate engine-room bilge reception at HDPE 1,000-5,000-gallon scale at the wet-dock + drydock cradle service. Naval-specific framework includes UNDS (Uniform National Discharge Standards) under 33 CFR 1322(n) and Navy NAVSEA-specific environmental compliance procedures.

Cruise-Line Port Reception. Port Miami + Port Everglades + PortMiami + Port Canaveral + Galveston + New Orleans + Long Beach + Seattle + New York + Boston + Bayonne (NJ) + Port Tampa Bay cruise terminals operate port-reception bilge + slop-pumpout from cruise-line and ferry-terminal vessel calls. Cruise vessels (Royal Caribbean, Carnival, Norwegian, Disney, MSC, Holland America, Princess, Celebrity, Virgin Voyages, Oceania) discharge bilge slops at port-reception facilities at 5,000-20,000-gallon-per-call volume; chlorinated bilge holding at HDPE 5,000-15,000-gallon scale ahead of the port-side OWS train.

Commercial-Vessel Bilge-Pumpout Vendor Service. Crowley Maritime, Foss Maritime, Kirby Inland Marine, Marine Spill Response Corporation, plus regional bilge-pumpout vendor companies operate mobile bilge-pumpout truck + barge service at U.S. and Canadian commercial ports for tug + barge + offshore-supply-vessel + freighter bilge-reception operations. Vendor truck + barge tankage is typically HDPE-lined or stainless-steel construction at 3,000-8,000-gallon scale; dockside transfer to HDPE 1,000-5,000-gallon receiving tank at the captive treatment facility.

Marine Repair-Yard and Boatyard Service. Regional marine repair yards and boatyards (Lyman-Morse Boatbuilding, Front Street Shipyard, Brooklin Boat Yard, Hinckley Service Yard, Wayfarer Marine, Brewer Yacht Yard chain, Yacht Haven Marine, Westport Yachts, Chesapeake Boats Inc.) operate small-vessel bilge-reception at HDPE 200-2,000-gallon scale at the captive yard wet-dock or drydock cradle. Small-vessel bilge volumes are 50-500 gallons per call; chlorinated to 1-3 ppm free chlorine.

Offshore Platform and Production Support. Offshore-platform service vessels (Edison Chouest, Tidewater, Hornbeck Offshore, Harvey Gulf, Otto Candies, Bordelon Marine) operating Gulf of Mexico + Pacific OCS + Atlantic OCS support service discharge bilge at port-reception stations along the coastal (Port Fourchon, Cameron LA, Port Aransas TX, Sabine Pass TX) at HDPE 1,000-5,000-gallon scale.

3. Regulatory Framework

EPA Vessel General Permit (VGP) and VIDA Framework. EPA Vessel General Permit (currently transitioning to Vessel Incidental Discharge Act regulations under 33 USC 1322(p)) governs incidental discharge of bilge water from commercial vessels and shoreside vessel-support facilities. VGP-specific limits include 15-ppm oil-and-grease maximum at the OWS effluent + bilge-water sampling + recordkeeping + bilge-water management plan requirements at the captive vessel operations.

MARPOL Annex I Oily-Water Discharge. International Convention for the Prevention of Pollution from Ships (MARPOL) Annex I governs oily-water discharge from machinery-space bilge at less-than-15-ppm oil-and-grease in compliance with IMO MEPC.107(49) Oily Water Separator type-approval framework. U.S. ratification + USCG enforcement at 33 CFR 151 governs U.S.-flag and U.S.-port-operating vessels.

USCG 33 CFR 151 Oily-Mixture Framework. U.S. Coast Guard regulations at 33 CFR 151.10 require shipboard Oil Record Book + bilge-pumpout recordkeeping + 15-ppm OWS compliance for all U.S.-flag and U.S.-port-calling vessels of 400 gross tons or greater. Reception-facility-side regulations at 33 CFR 158 establish port-reception capacity + adequate-reception-facility framework.

IMO MEPC.107(49) OWS Type-Approval. International Maritime Organization Marine Environment Protection Committee Resolution 107(49) sets type-approval framework for shipboard 15-ppm Oily Water Separators including bilge-water alarm + automatic-stopping-device + sampling-arrangement requirements. Receiving facilities accepting bilge slops align with the upstream type-approval-compliant separator chain.

EPA 40 CFR 110 Oil-Discharge Framework. EPA 40 CFR 110 prohibits oil discharge to surface water that creates a sheen or sludge at the receiving water; bilge-water reception facilities operate under joint USCG + EPA framework with state DEP delegation in most coastal states.

EPA NPDES and State Discharge Framework. Bilge-water reception + OWS effluent discharge to surface water or to municipal POTW is regulated under EPA NPDES (40 CFR 122) framework with state delegation. Permit-specific limits include 15-ppm oil-and-grease + total dissolved solids + chloride + chlorine residual + biochemical oxygen demand + total suspended solids monitoring at the OWS effluent point.

EPA SPCC and Stormwater Framework. Coastal industrial sites with bulk bilge-water reception + chlorinated bilge tank storage exceeding 1,320-gallon aggregate threshold require Spill Prevention, Control, and Countermeasure (SPCC) plans under 40 CFR 112; concurrent industrial stormwater permitting under 40 CFR 122 multi-sector general permit applies at most coastal shipyard + naval + cruise-port sites.

OSHA HazCom and Confined-Space Framework. Bilge-water handling at the dockside reception facility is regulated under OSHA HazCom (29 CFR 1910.1200) with mixed-stream SDS requirements; confined-space entry into the reception holding tank for cleaning + inspection is regulated under OSHA 29 CFR 1910.146 with atmospheric monitoring + supplied-air respiratory protection at any internal entry due to potential hydrogen-sulfide + low-oxygen + oil-vapor exposure.

4. Storage System Specification

Dockside Bilge Reception Tank. Primary bilge-water reception holding at HDPE rotomolded 1,000-10,000-gallon scale: standard HDPE resin per ASTM D1248 specification with carbon-black UV-stabilizer for outdoor coastal exposure; vertical flat-bottom or conical-bottom vessel; 4-inch ANSI flanged top fill connection from the dockside pumpout transfer hose; 3-inch flanged bottom outlet with PVC or CPVC ball valve to the OWS feed pump; atmospheric vent with insect-screen + dust-cover + flame-arrester at oily-vapor service; 18-24-inch top manway for inspection + sludge clean-out access; ultrasonic or radar level transmitter with high-high alarm + low-low alarm; conductivity probe + pH probe + chlorine-residual probe at the recirculation-loop outlet for water-quality QC.

Hypochlorite Day-Tank. Day-tank service for sodium-hypochlorite (12-15% NaOCl) bilge-water disinfection dosing is at HDPE 100-500-gallon vertical tank with calibrated dip-tube level + sight-glass at the chemical-mixing station; CPVC piping + diaphragm metering pump at the active bilge-tank dosing point at typical 5-30 gpm hypochlorite-makeup blend rate; PVDF or Hastelloy wetted-parts pump preferred at concentrated-hypochlorite service.

OWS Feed Equalization Tank. Secondary equalization holding ahead of the captive oily-water-separator (OWS) is at HDPE or FRP 500-5,000-gallon scale; bilge-water enters from the primary reception tank and is metered to the OWS at controlled flow rate to maintain OWS performance within type-approval envelope. Coalescing-media pre-treatment is integrated at the inlet manifold.

OWS Effluent Discharge Tank. Treated post-OWS effluent (less-than-15-ppm oil-and-grease) holding at HDPE 200-2,000-gallon vertical atmospheric scale ahead of NPDES-compliant outfall or POTW discharge; integration with composite sampler + flow meter + monitoring instrumentation per state-DEP NPDES permit framework.

Sludge / Slop-Oil Recovery Tank. OWS-recovered slop oil + sludge holding at HDPE 500-3,000-gallon vertical atmospheric scale ahead of licensed off-site oil-recovery hauler pickup; carbon-black UV-stabilizer + secondary-containment integration. Slop oil typically 5-25% water, 70-90% hydrocarbon-rich content, 1-5% solids.

5. Field Handling Reality

Handler PPE. Chlorinated bilge water handling: chemical-resistant gloves (Viton or nitrile or neoprene) + chemical-splash goggles + face shield at OWS + sludge-dump operations + closed-toe footwear + chemical-resistant apron at the dockside reception transfer. Eye-wash station + emergency shower per OSHA 29 CFR 1910.151 minimum at the chemical-handling area. Hydrogen-sulfide monitor at any confined-space entry.

Pumpout Transfer. Vessel-to-shore bilge transfer is via 2-3-inch CPVC + 316L stainless or duplex 2205 transfer hose + camlock + manual ball-valve isolation; transfer pumps are typically air-operated diaphragm (PP or PVDF body, EPDM diaphragm) at 30-100 gpm transfer rate or progressive-cavity pump at higher-viscosity slop transfer. USCG OPA-90 oil-spill-response readiness applies at all dockside transfer operations.

Chlorine Residual and Microbial Suppression QC. Each reception-tank cycle requires water-quality monitoring at the holding-tank outlet: free-chlorine residual check via DPD colorimetric test or in-line amperometric probe (target 1-5 ppm at the OWS feed point), pH check via glass electrode (target 6.5-8.5), oil-and-grease check via Method 1664B or in-line capacitive probe, and total-suspended-solids check at the OWS effluent for NPDES compliance.

Spill Response. Bilge-water release at the dockside reception facility is treated as a potential oil spill under 40 CFR 110 + OPA-90 framework: contain to secondary containment, deploy oil-absorbent boom + pad, recover via vacuum truck or skimmer to recovery tank, notify USCG National Response Center at any release exceeding the harmful-quantity threshold (sheen visible on receiving water), notify state DEP per state-specific reportable-threshold framework, document for SPCC + facility-incident-log reporting.

Tank Cleaning and Inspection. Annual or semi-annual bilge reception tank inspection + cleaning per facility procedure: drain to sludge-recovery tank, mechanical de-sludging with high-pressure washer + scraper at the tank floor, freshwater triple-rinse, biocide soak (200-500 ppm chlorine at 1-hour dwell), refill at next campaign. Confined-space entry per OSHA 29 CFR 1910.146 with atmospheric monitoring (oxygen + LEL + H2S) + supplied-air respiratory protection at any internal inspection. Sludge disposal via licensed hazardous-waste hauler per RCRA framework.

OWS Performance Monitoring. The captive oily-water-separator must maintain less-than-15-ppm oil-and-grease at the discharge outlet per VGP + MARPOL Annex I framework; performance is monitored via in-line capacitive oil-content probe + composite sampling per state-DEP NPDES permit framework.

Talk to OneSource Plastics

Listed price covers tank + standard fitting package; LTL freight is quoted separately to your delivery ZIP. Call 866-418-1777, use our freight estimator, or try our chemical tank recommender to narrow material selection.