Sample the coating, not only the grit
Knowing the coating system before blasting lets the whole job be planned to the right classification. Finding out from the spent media means the decision has already been made for you, at volume.
Shipbuilding and shipyard waste disposal
A shipyard handles paints, solvents and lubricants alongside construction debris and packaging. On a working yard one stream dominates everything by weight, and its classification has almost nothing to do with the material itself.
The old paint decides what the grit is
Abrasive blasting to remove coatings from a hull produces spent media in enormous volume, and the media arrives on site as an inert mineral product. What leaves is the media plus everything it took off the steel. On older vessels that means lead from primers, chromium from anticorrosive coatings, and in some cases organotin from antifouling systems, concentrated into the grit at far higher levels than in the paint film. So the disposal classification of the largest stream on the yard is set by the specification of a coating applied decades earlier, not by the blasting operation. This is why sampling the coating before the job is worth more than sampling the grit afterwards: it is the difference between planning a non-hazardous bulk removal and discovering a hazardous one halfway through a dock period.
What this process generates
What a shipyard operation sends off site, what each stream is under the federal rules, and the service that takes it — with the codes as a starting point for a profile rather than a substitute for one.
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D008 / D007
Spent abrasive blast media
The dominant stream by weight. Classification follows the coating removed, and the metals concentrate well above their level in the original paint film.
End Dump Trailers -
D001 / F003 / F005
Paints, coatings and thinners
Unused and part-used product, mixing waste, gun wash and thinner. Ignitable, and listed where the solvent was used for cleaning.
Hazardous Waste Incineration -
Oily water
Bilge, ballast and tank cleaning water
Oily water from vessels alongside and from tank entry preparation. Usually a treatment question rather than a disposal one.
Industrial Wastewater Treatment -
F001 - F005
Solvents, degreasers and shop chemicals
Surface preparation and equipment cleaning across the trades. Listed where a named solvent was used for its solvent properties.
RCRA Hazardous Waste Disposal -
Metal-dependent
Welding, cutting and grinding residues
Fume extraction dust, slag and grinding residue. Coated or galvanized stock puts metals into the dust that were not in the base steel.
Non-Acute Hazardous Waste Disposal -
Non-regulated
Construction debris and packaging
The significant non-hazardous fraction on any yard: large volume, low complexity, and best handled as a roll-off program rather than as waste management.
Roll-Off Boxes
What the regulator expects
The parts of the federal rules that decide how a shipyard generator is treated — and the ones that catch this industry specifically rather than every industry equally.
Blast media cannot be blended to a result
Mixing hazardous spent media with clean media to bring an average below a regulatory level is impermissible dilution rather than treatment. The volumes make it tempting, which is exactly why it is looked for.
Dock periods are campaigns
A vessel alongside generates in weeks what the yard generates in months. Containers, equipment and haulage capacity have to be scheduled against the dock plan, not requested when the grit is already on the ground.
The services this industry uses
Not the whole catalog — the ones a shipyard site actually meets, in roughly the order it meets them.
The questions that come before a quote
What shipyard generators ask before they ask for a price, answered from the rules rather than from marketing copy.
No, and the difference is worth a great deal of money. Media from new steel or modern coatings is frequently non-hazardous. Media from an old hull with lead or chromate primers frequently is not. The coating history is the predictor, and it is knowable before the job.
Often it is a treatment question rather than a disposal one, depending on your permits and the oil content. Where on-site treatment is not available, industrial wastewater treatment is normally a better route than handling it as a bulk waste.
At the same time as the blasting and coating scope, because that scope is what determines the streams. A dock period is the clearest case on this site of waste being predictable months in advance and still arranged last.
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