Sand Blasting & Metals Refinishing OperationsRefinishing ......containment Empty container must have...
22
Sand Blasting & Metals Refinishing Operations Refinishing Operations An Environmental Impact View 1
Transcript of Sand Blasting & Metals Refinishing OperationsRefinishing ......containment Empty container must have...
Sand Blasting & Metals Refinishing OperationsRefinishing Operations
An Environmental Impact View
1
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
2
gy
Types of Abrasives
Silica SandCoal SlaggCopper SlagGarnetMetal – Shot, GritGlassGlassWaterOthers – Dry Ice Nitrogen Sponge Jet
3
Others – Dry Ice, Nitrogen, Sponge Jet
Advantages / Disadvantages
Purchase cost variesUsage rates varyUsage rates varyAbility to recycleD CDust CreationWaste Disposal issuesMIL Spec requirementsLocal regulatory requirements
4
Local regulatory requirements
Coating Removal Technologies
Dry Abrasive BlastingSlurry BlastingSlurry Blasting
Ultra High Pressure Water Blastingj tµ-jet
Dry IceHigh Tech: Liquid Nitrogen, Laser…..
5
Dry Abrasives
Dust ConcernsImpacts to SoilpImpacts to GroundwaterImpacts to Storm WaterWaste Disposal
Is it Hazardous???
6
More Dry Abrasive Issues
Shrouding essentialCondition of shroudsHeight of shrouds
Number of nozzlesLbs / hr usage of abrasive per nozzleAir Pressure
7
More Dry Abrasive Issues
Worker ProtectionProperty Line p yStandardNuisance ComplaintsAbility to permit
PBR very restrictiveChapter 116 permit difficult to obtain
8
Ultra High Pressure Water
Minimal Air IssuesAbility to collect ywaste waterDisposal of Water $Availability of Source WaterVery Low Productivity
9
Ultra High Pressure Water
Must collect waste water
Metal Products & Machinery CategoricalCategorical DischargeCould be Hazardous due to Lead
10
µ-jetµ-jetSipco Patented Designp g
Ultra High Pressure Water+ Abrasives
More ProductiveLower Abrasive UsageNo DustHigh $ Equipment costMust be able to collect water
11
jµ-jetModular Equipment
Self-ContainedEnvironmentally DesignedMi i i tMinimizes waste generationMinimizes Storm Water Concerns
12
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
13
Other Sipco Technology
Abrasive HoppersBlast PotsLoading / transfer systemsD i d fDesigned for minimal impact.
Reduced airReduced air emissionsReduced waste
14
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
15
Old Standard Exemption authorized 30 lbs / hr. max.
Coating Technologies
Air SprayAirlessHVLPBrush / RolledPowder CoatElectrostaticElectrostatic
16
Coating Technology Issues
Air SprayLow transfer efficiency(60%) highefficiency(60%), high over spray
AirlessBetter transfer eff. (75-80%)
HVLPHVLPBest transfer eff. (85%)
17
Coating BMPs
Open Containers and Paint pumps on plastic or in containment
P il /Prevents soil / groundwater / storm water contaminationReduces potential for waste generation
18
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
19
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?
20
g
Other Issues
Compressed Air Source
Oil Leaks?Where is condensate
i ?going?Diesel Engine permanent mounted?p
Possible Air Permit issue.
21
Other Issues
Beyond Blasting & Painting
Storm Water Concerns?P i it f t dProximity of stored materials to waterPollution Pathway?y
22
