Sump and Grease Trap Wastes - Montana...
Transcript of Sump and Grease Trap Wastes - Montana...
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Sump and Grease Trap Wastes
A primer
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Sump Wastes
Car Wash Sumps
Sumps divided into two categories:
Other Sumps
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Other Sumps ARM 17.50.814(3) states:
“A person may not pump or dispose of wastes from any type of sump other than a car wash sump unless the person has first applied to the department and received its approval….”
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Other Sumps So, what does this mean?
You may not pump any sump other than a car wash sump unless the Department has issued you approval specific to that particular sump. The Department will evaluate these “other sumps” on a case-by-case basis.
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Other Sumps So, what do you need to submit to obtain approval to pump and dispose of waste from “other sumps”?
Contact the Department
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Car Wash Sumps
Attended
Car wash sumps further divided by type:
Unattended
Automatic
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Car Wash Sumps What is an Automatic Car Wash? ARM 17.50.802(5) defines an Automatic Car Wash as:
“… a place for washing trucks or automobiles that has machinery designed to do the washing without allowing access to the bay during the process.”
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Automatic Car Wash
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Automatic Car Wash
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Car Wash Sumps
May be used as clean fill;
Automatic Car Wash Sump Waste Disposal Options
May be used as daily cover at a licensed solid waste landfill if dewatered first.
Regardless of final disposal option chosen, disposal can only occur at a pre-approved site.
May be land-applied;
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Car Wash Sumps What is an Attended Car Wash?
ARM 17.50.802(4) defines an Attended Car Wash Bay as:
“… a place for washing trucks or automobiles that has an attendant on site while open to the public.” (continuous supervision)
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Car Wash Sumps Attended Car Wash Sump Waste Disposal Options
Must first perform visual check for oil and grease
Step 1
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Car Wash Sumps Attended Car Wash Sump Waste Disposal Options If the car wash prohibits the use of
chlorinated solvents and if the waste contains no visible oil or grease, the waste may then be used as clean fill ONLY if the car wash owner provides the pumper a written statement that the material is solvent-free (ARM 17.50.814(5))
Option #1
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Car Wash Sumps Attended Car Wash Sump Waste Disposal Options If the car wash prohibits the use of
chlorinated solvents but the waste contains visible oil or grease, the material may be landfarmed in accordance with the Solid Waste rules, or, if dewatered, the material may be disposed at a licensed Class II landfill with the operator’s permission
Option #2
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Car Wash Sumps Attended Car Wash Sump Waste Disposal Options
If the car wash does not prohibit the use of chlorinated solvents, the sump waste must be handled in the same manner as an unattended car wash bay sump
Option #3
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Car Wash Sumps What is an Unattended Car Wash?
ARM 17.50.802(35) defines an Unattended Car Wash Bay as:
“… a place for washing cars or trucks that is not an automatic car wash bay and does not have continuous supervision while open to the public.”
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Unattended Car Wash
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Unattended Car Wash
Why?
Does not have continuous supervision. Open to the public 24-hours.
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Car Wash Sumps Unattended Car Wash Sump Waste Disposal Options
Must first perform visual check for oil and grease
Step 1
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Car Wash Sumps
Waste must be screened for chlorinated solvents
Unattended Car Wash Sump Waste Disposal Options
The owner must provide the pumper with a statement concerning the solvent-free status of the material
OR
Step 2
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Car Wash Sumps
If the pumpings do not contain visible oil and grease and are known to be free of chlorinated solvents (by testing or knowledge) the material may be used as either clean fill or, if dewatered, as daily or intermediate landfill cover
Unattended Car Wash Sump Waste Disposal Options
Option #1
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Car Wash Sumps
If the pumpings contain visible oil and grease but are known to be free of chlorinated solvents (by testing or knowledge) the material may be either landfarmed or disposed of at a licensed Class II landfill with the operator’s permission
Unattended Car Wash Sump Waste Disposal Options
Option #2
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It may be clean fill, but…….
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Grease Trap Wastes
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Grease Trap Wastes
Grease trap waste consists of the oily and greasy residue separated from the wastewater discharge of a food preparation operation and collected in a specialized separation and storage containers.
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Grease Trap Wastes
GTW Characteristics: Total Solids: 6%
Total Volatile Solids: 88%
Fats, Oils, Grease: 1.1%
pH: 4.4
Total Nitrogen: 0.0056%
Total Phosphorus: 0.0029%
Potassium: 0.0036% Source: Pumper Magazine, March, 2000
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Grease Trap Wastes
Rendering Facilities GTW disposal options:
Landfill
WWTP
Inferior fat source with high cost to filter into renderable material that yields a low grade product (tallow)
GTW must first be dewatered – tipping fees may be cost prohibitive
Few facilities accept because of high organic loading to system with a difficult to treat material
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Grease Trap Wastes
Land Application GTW typically contains less than 1% nitrogen
GTW is a source of carbon
GTW is subject to tilling requirements
GTW disposal options:
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Grease Trap Wastes
Liquid fraction (fats) and water disperse
O&M considerations for the Land-Application of GTW
Water percolates readily Fats coat soil particles and percolate more slowly
This makes soil surface water repellent and causes soil-pore blockage
Mechanical incorporation disperses the fats into the soil, aerates the soil, helps to reduce odors and allows for greater application rates
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Grease Trap Wastes Limited research – NAWT study (Pumper magazine, March, 2000)
GTW application must be documented in your records
Land applied GTW must be incorporated within 6-hours of application
Application rate: approximately 16,000 gallons/acre