By: Marty McDonald
     HDB Marine
    April 8, 2010
Vessel Generated Wash Wastewater
Marinas conducting vessel maintenance activities such as mechanical repairs,
refurbishing...
EPA - NPDES
o Federal Law established by EPA
o EPA does not lend assistance
o Is enforced by the State
o Extreme enforceme...
Marina Facilities with Boat Wash Operations


• Dry Storage Marinas – primarily rinsing the
boats off – removing salt wate...
Boat wash operations are primarily dealing
with organics and paint chips.
Some metals and hydrocarbons. Heavy
metals have ...
Pressure Washers & Water Volume
• Average pressure washer is 4 GPM with 2000 to 3000 PSI
• Commercial sprayer with 5 GPM a...
Collecting the Wash Water


Wash Pad Design Requirements
• Impervious materials – concrete, plastic,
rubber, asphalt
• Mus...
Permanent Designs
Good Practice
• Use the wash pad as the first filter to settle out large particles –
sweep & clean daily...
Raised Trough Entry
                            • wash water enters
                            the 3 holes
              ...
Center Trough Design
• Unlimited Equipment
movement
• Trough / Grate feeds
the water to a diversion
selection point where
...
Center Trough Pad
• 6’ Fence- overspray
• Pad slope : 1/8”/FT
• Sump Pump feeds in-
ground settling tank
• Recycling Equip...
Recycling Equipment is located in heated
building for winter operations.
Above Ground Settling Tank
• 500 gallon settling cone Tank – settle out large particles
• Used with large washing operatio...
This pad is built on a
                          hard surface area.

                          Pad is designed for
       ...
Unique Design
• 1000 gallon in-ground
settling tank
• 400 gallon above ground
settling tank w/bag filter
• feeds to a Sett...
Filter Cloth – over pervious pad
• Temporary solution – Connecticut
• Will install a wash pad in 2010
Portable or Temporary Use Wash Pads
• Constructed with impervious materials
• Cost Varies: $5 to $15 per SF
• 22’ x 60’ = ...
Retrofitting Existing Concrete Pad
• Save Money! Take advantage of exiting pad
• Boatyards and marinas with Travel Lift eq...
Manufactured Trough Drains with Grate
• Manufacturers – Nationwide – Factory Installers
• Modules designed for specific lo...
Manufactured Boom Collectors
• Designed in modules
• Many designs are equipped with vacuum pump
• May be used with tempora...
Retrofit Options for Existing Wash Pad
• Existing pad size: 32’ x 80’
• Slopes to the bulkhead pickup area
• Is serviced b...
Install Commercial Drain System & Collection
Sump
Existing Pad Size: 32’ x 80’
Retrofit Cost: $10,500 to $12,500
Install Curbing & Collection Sump
Existing Pad Size: 32’ x 80’
Retrofit Cost: $1,500 to $2,500
Existing pad slopes to the front
•   Install gutter to drain water to sump - $2800
•   Install factory drain with trough c...
Wash Pad Collection Designs
• There are viable options for almost all
marina operations – permanent pads,
portable pads, r...
Boat Washpad Designs To Meet NPDES
Boat Washpad Designs To Meet NPDES
Boat Washpad Designs To Meet NPDES
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Boat Washpad Designs To Meet NPDES

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Design Considerations for Marina Boat Wash Pads to meet NPDES regulations

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Boat Washpad Designs To Meet NPDES

  1. 1. By: Marty McDonald HDB Marine April 8, 2010
  2. 2. Vessel Generated Wash Wastewater Marinas conducting vessel maintenance activities such as mechanical repairs, refurbishing, painting, fueling and cleaning operations are required to have a Basic Industrial Storm water General Permit (General Permit). The permit was designed to protect the coastal environment from pollution by eliminating the potential for storm water to come into contact with pollutants. Marinas sanctioned by the General Permit are required to prepare a Storm water Pollution Prevention Plan (SPPP). By May 31, 2009 marinas must eliminate the discharge of vessel wash water into surface and ground water. Marinas have the option of ceasing the practice of washing vessels or can capture the water and recycle the wash water, haul the wash water for proper disposal or request permission to connect to the sanitary sewer where applicable. Wash Wastewater Characterization and Data Wastewater generated from washing vessel bottoms can contain various levels of both solid and dissolved metals (copper, zinc, lead, iron and other metals), organic materials (barnacles, tube worms and algae) and salts. The amount of lead in the wastewater can be greatly reduced by removing the sacrificial anodes prior to pressure washing. Studies have indicated that the metals commonly found in vessel wash wastewater bind preferentially to fine particles. It should be noted that these fine particles and bound metals can be difficult to remove from the wastewater through filtration. In addition, when the wastewater is recycled and particles remain marina operators have reported that it can lead to the early breakdown of the pressure washer. Marina operators have alleviated this problem by passing the water through a 50 micron filter. The I BOAT NJ is currently funding several wash wastewater studies at the following marinas in New Jersey: All Seasons Marina, Dillon’s Creek Marina, Viking Marina. Information on the type of systems they are testing is available below and data on the wash wastewater will be posted as it becomes available. Several states have conducted an analysis of the wash wastewater and there information is available by clicking on the links below. Connecticut Maine New Jersey - coming soon Washington
  3. 3. EPA - NPDES o Federal Law established by EPA o EPA does not lend assistance o Is enforced by the State o Extreme enforcement – fresh city water has been considered as toxic EPA - Suggested Solutions o Closed Loop Recycling Systems – equipment cost $10,000 to $30,000 o Treat and discharge to Public Sewage System equipment cost $25,000 to $75,000 o Containment followed by offsite disposal cost is $1.50 to $3.00 per gallon o Cease washing boats
  4. 4. Marina Facilities with Boat Wash Operations • Dry Storage Marinas – primarily rinsing the boats off – removing salt water, trace films of hydrocarbons and organics • Boat Yards – paint chips, organic growth, trace metals and hydrocarbons • Seasonal Haul-out Operations – organic growth, some paint, trace metals and hydrocarbons • Commercial Boat Wash Operations - organic growth, some paint, trace metals and hydrocarbons
  5. 5. Boat wash operations are primarily dealing with organics and paint chips. Some metals and hydrocarbons. Heavy metals have been reduced with new bottom paints.
  6. 6. Pressure Washers & Water Volume • Average pressure washer is 4 GPM with 2000 to 3000 PSI • Commercial sprayer with 5 GPM and 1500 PSI – delivers super results • CMTA – extensive study 2008 – the average amount of water used to wash a boat is = 1 gallon / linear foot of boat • 30’ boat = 30 gallons, 50’ boat = 50 gallons • Big Boat Haul-out facilities wash a maximum of 10 boats a day per wash area (informal fact gathering) • Majority of Boat Yards use water only – no cleaners – just pressure! • Wash 10- 40’ boats in a day – use 400 gallons of water • 15% to 20% of wash water is lost due to evaporation, seepage, film stays on the boat, etc. Recycling Systems routinely replace the lost water with fresh water.
  7. 7. Collecting the Wash Water Wash Pad Design Requirements • Impervious materials – concrete, plastic, rubber, asphalt • Must capture and contain the wash water • Must properly handle Rain/storm water Wash Pad Options • Permanent Wash Pads • Portable or Temporary Use Wash Pads • Retro Fitting Existing Permanent Pad Areas
  8. 8. Permanent Designs Good Practice • Use the wash pad as the first filter to settle out large particles – sweep & clean daily • Slope – 1/8 inch per foot • Use engineer or qualified contractor to design the pad for loads, soil conditions, tire wear & equipment safety operations • Cost Varies – 22’ x 60’ pad cost $15,000 to $30,000 • Options include raised trough designs and center trough designs • May use bag filters in troughs
  9. 9. Raised Trough Entry • wash water enters the 3 holes • Holes are closed when not washing so that rain/storm water is diverted to the marina runoff system Small Sump Design • 24” x 24” x 32” deep • Entries & exits for the electrical service, sump pump discharge and Recycle System Drain • Simple to maintain & clean, minimizes odor problems
  10. 10. Center Trough Design • Unlimited Equipment movement • Trough / Grate feeds the water to a diversion selection point where wash water is sent to the Recycle System and/or rain water is diverted to the storm runoff area • Trough is cleaned at close of each wash day
  11. 11. Center Trough Pad • 6’ Fence- overspray • Pad slope : 1/8”/FT • Sump Pump feeds in- ground settling tank • Recycling Equipment picks up water from in- ground tank • Designed for 400 + boats
  12. 12. Recycling Equipment is located in heated building for winter operations.
  13. 13. Above Ground Settling Tank • 500 gallon settling cone Tank – settle out large particles • Used with large washing operations (300 – 500 boats) • Settling tank feed water to a transfer tank/pump that feeds the Recycling System • Recycling System is equipped with auto-circulation that circulates all water/tanks through a UV light treatment and bromine oxidation unit to mitigate organics and eliminate odors
  14. 14. This pad is built on a hard surface area. Pad is designed for very large forklift loads for dry storage facility. New pad to be built in the area where the boat is. This is a fill area and will require driven piles to support the load of a 50 ton travel lift and large forklift.
  15. 15. Unique Design • 1000 gallon in-ground settling tank • 400 gallon above ground settling tank w/bag filter • feeds to a Settling Pond on site
  16. 16. Filter Cloth – over pervious pad • Temporary solution – Connecticut • Will install a wash pad in 2010
  17. 17. Portable or Temporary Use Wash Pads • Constructed with impervious materials • Cost Varies: $5 to $15 per SF • 22’ x 60’ = $6,600 to $19,800 • Many Manufacturers and suppliers – Hydro Engineering, Kyoto • Proper preparation of area underneath the pad is critical • Wash water may be pumped or vacuumed from collection area
  18. 18. Retrofitting Existing Concrete Pad • Save Money! Take advantage of exiting pad • Boatyards and marinas with Travel Lift equipment have a heavy duty pad that is used as a wash area. • Determine slope and water flow on the pad • Use curbs or burms to guide the water • Use manufactured trough & grate to intercept and collect the water • Use manufactured collection boom to intercept and collect water • Must allow for proper handling of rain and storm water • Must capture and contain the wash water Determine Pad Slope • Survey levels • Use water
  19. 19. Manufactured Trough Drains with Grate • Manufacturers – Nationwide – Factory Installers • Modules designed for specific load applications • Can retrofit or install in new pad • Modules designed to slope in desired direction
  20. 20. Manufactured Boom Collectors • Designed in modules • Many designs are equipped with vacuum pump • May be used with temporary pads • Modules designed to slope in desired direction
  21. 21. Retrofit Options for Existing Wash Pad • Existing pad size: 32’ x 80’ • Slopes to the bulkhead pickup area • Is serviced by a 30 ton Travel Lift and large forklift • 18” thick concrete pad – 20 years old – structurally sound • Has minor surface cracking that can be sealed • Two options
  22. 22. Install Commercial Drain System & Collection Sump Existing Pad Size: 32’ x 80’ Retrofit Cost: $10,500 to $12,500
  23. 23. Install Curbing & Collection Sump Existing Pad Size: 32’ x 80’ Retrofit Cost: $1,500 to $2,500
  24. 24. Existing pad slopes to the front • Install gutter to drain water to sump - $2800 • Install factory drain with trough cover- $6000 • limited curbing required - $800 • Provide Flow-Through Forklift Stop- included
  25. 25. Wash Pad Collection Designs • There are viable options for almost all marina operations – permanent pads, portable pads, retrofitting existing • Marinas should establish “Best Management Practices” • Marinas should use “ Best Available Technology” • Consider “Environmental Fees” NPDES – 2010 • Will see more and more marinas meeting the NPDES regulations

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