Non Hazardous Wastewaters
EMI accepts wastewaters generated through many sources, such as
industrial maintenance activities and cleaning of storage tanks. Wastewaters
received at EMI also typically contain a certain amount of
scale
and/or grit.
Documents
Required for Approval and Shipment of This Waste Stream
Acceptance, Treatment
And Disposal of This Waste Stream
EMI
Waste Profile Form
(ADOBE PDF DOCUMENT)
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Documents
Required for Waste Approval and Shipment
EMI requires that each new shipment of wastewater that is proposed for storage and/or treatment at the facility undergo an initial waste characterization prior to shipment.
The need for analytical testing (as opposed to generator’s “knowledge of the process”) may be waived at the discretion of EMI’s Facility Manager based on the generator’s knowledge of the waste and process generating the waste.
The frequency with which an initial analysis is repeated or reviewed (to ensure that it is accurate) is based upon either (1) a reason to believe that the process generating the waste has changed or (2) if the waste shipment does not match the waste description on the accompanying
shipping document.
EMI requires that the Generator or his/her
authorized representative complete and the sign a Waste Profile
Form (WPF). Upon approval of the WPF EMI will issue a
EMI Authorization number for the waste stream prior to
scheduling and acceptance of the waste at the EMI
facility.
Proper shipping papers must accompany all wastes received
at EMI. EMI accepts nonhazardous materials on a bill of
lading, nonhazardous waste manifest or hazardous waste
manifest (using appropriate nonhazardous designation or
waste code). EMI-approved transporters must
examine their shipping papers to determine accurate drum
counts, quantities, waste types, approval numbers, etc. to
detect any discrepancies that could be corrected prior to
arrival at EMI. Only shipments accompanied by
proper/complete shipping papers, WPF, and EMI approval
number are accepted at EMI.
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Acceptance,
Treatment
and Disposal of This Waste Stream
Wastewaters are off-loaded and stored in 15,000-gallon capacity aboveground, single-walled steel storage tanks (ASTs) located within a concrete containment dike area.
The wastewater is then pumped to the water treatment system holding tanks. After settling, the water is pumped from the holding tanks to the water treatment system feed tank. Wastewater is treated using a combination of additional gravitational separation, chemical treatment, ultra filtration (via a membrane system), and carbon polishing. Ultimately, the treated wastewater is discharged to the local City of South Portland POTW under an Industrial User
Wastewater Discharge Permit Number
005.
Wastewater may be unloaded directly into the water treatment system holding tanks, provided that the wastewater is suitable for treatment and discharge. After being pumped to the water treatment system feed tank, water meeting this classification proceeds immediately through a combination of chemical treatment, ultra filtration membrane separation, carbon polishing, and ultimate discharge to the City of South Portland POTW in accordance with the pre-treatment permit limits.
Sludge generated from the settling of materials throughout the wastewater treatment process is dewatered in a recessed-plate filter press. From the filter press the dewatered sludge is placed in 30-yard roll-off containers prior to being transported off site and disposed of at a properly licensed facility.
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