sand blasting & metals refinishing operationsrefinishing ......containment empty container must...
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Sand Blasting & Metals Refinishing OperationsRefinishing Operations
An Environmental Impact View
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Acronym Key
BMP – Best Management PracticeMIL S Mili
PI-7 – Form that must be completed and sent to TCEQ for certain PBRsMIL Spec – Military
SpecificationPBR – Permit by Rule
TCEQ for certain PBRsVOC – Volatile Organic CompoundNESHAP N ti lPBR Permit by Rule
(ie: Chapter 106 authorization)
AC
NESHAP – National Emission Standard for Hazardous Air P ll t tMACT – Maximum
Achievable Control Technology
PollutantsHVLP – High Volume Low Pressure
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Types of Abrasives
Silica SandCoal SlaggCopper SlagGarnetMetal – Shot, GritGlassGlassWaterOthers – Dry Ice Nitrogen Sponge Jet
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Others – Dry Ice, Nitrogen, Sponge Jet
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Advantages / Disadvantages
Purchase cost variesUsage rates varyUsage rates varyAbility to recycleD CDust CreationWaste Disposal issuesMIL Spec requirementsLocal regulatory requirements
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Local regulatory requirements
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Coating Removal Technologies
Dry Abrasive BlastingSlurry BlastingSlurry Blasting
Ultra High Pressure Water Blastingj tµ-jet
Dry IceHigh Tech: Liquid Nitrogen, Laser…..
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Dry Abrasives
Dust ConcernsImpacts to SoilpImpacts to GroundwaterImpacts to Storm WaterWaste Disposal
Is it Hazardous???
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More Dry Abrasive Issues
Shrouding essentialCondition of shroudsHeight of shrouds
Number of nozzlesLbs / hr usage of abrasive per nozzleAir Pressure
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More Dry Abrasive Issues
Worker ProtectionProperty Line p yStandardNuisance ComplaintsAbility to permit
PBR very restrictiveChapter 116 permit difficult to obtain
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Ultra High Pressure Water
Minimal Air IssuesAbility to collect ywaste waterDisposal of Water $Availability of Source WaterVery Low Productivity
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Ultra High Pressure Water
Must collect waste water
Metal Products & Machinery CategoricalCategorical DischargeCould be Hazardous due to Lead
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µ-jetµ-jetSipco Patented Designp g
Ultra High Pressure Water+ Abrasives
More ProductiveLower Abrasive UsageNo DustHigh $ Equipment costMust be able to collect water
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jµ-jetModular Equipment
Self-ContainedEnvironmentally DesignedMi i i tMinimizes waste generationMinimizes Storm Water Concerns
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µ-jet In Use
Surfaces protected / contained
Prevent soil / storm water issues
L d t h dLess need to shroudNo permit required
PBR PI 7PBR, no PI-7
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Other Sipco Technology
Abrasive HoppersBlast PotsLoading / transfer systemsD i d fDesigned for minimal impact.
Reduced airReduced air emissionsReduced waste
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Coating Issues
Chapter 115 Rules for each industryLimits VOC contentApplicable to essentially ALL
Not just Major Sources (ie:Title V permits)
NESHAP MACT R lNESHAP MACT RulesOnly applicable to Major Sources
PBR t i tiPBR very restrictive:6 pounds / hr of VOCs (ie: 2 to 3 gallons per hour)
Old Standard Exemption authorized 30 lbs / hr max
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Old Standard Exemption authorized 30 lbs / hr. max.
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Coating Technologies
Air SprayAirlessHVLPBrush / RolledPowder CoatElectrostaticElectrostatic
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Coating Technology Issues
Air SprayLow transfer efficiency(60%) highefficiency(60%), high over spray
AirlessBetter transfer eff. (75-80%)
HVLPHVLPBest transfer eff. (85%)
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Coating BMPs
Open Containers and Paint pumps on plastic or in containment
P il /Prevents soil / groundwater / storm water contaminationReduces potential for waste generation
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Coating BMPsEven Empty Containers should be on plastic / in containmentcontainmentEmpty container must have less than 1” of residue to be consideredresidue to be considered empty
OK to dry openIf d OK di iIf dry, OK to dispose in Class II waste if 5 Gallon or smaller
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Coating Issues
Paint Waste is a Universal Waste
No longer managed as “Hazardous Waste”Waste
No manifest requiredStill requires prudentStill requires prudent management
Does this look right?
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Other Issues
Compressed Air Source
Oil Leaks?Where is condensate
i ?going?Diesel Engine permanent mounted?p
Possible Air Permit issue.
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Other Issues
Beyond Blasting & Painting
Storm Water Concerns?P i it f t dProximity of stored materials to waterPollution Pathway?y
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