Discharging water that contains a visible sheen is a violation of the Clean Water Act and can subject facilities to fines under the EPA’s Stormwater and Spill Control and Countermeasures Plan (SPCC) Rules. In addition to waters having no visible sheen when they are discharged, most states and municipalities have established a 5 mg/l limit on Total Oil and Grease (TOG) in Stormwater discharges.
To help facilities meet these requirements, Drainiac® Petroleum Filter Valves can be connected to stormwater outflow valves on secondary containment systems. The Filter Valve is an oil-water separator that captures oil and allows clean water to flow through. As the filtering media in the unit captures oil, it swells. When the filtering media has reached capacity, the swelling of the filtering media shuts off the flow of water through the unit to prevent oil from being discharged.
To verify that the Drainiac® Petroleum Filter Valve reduces TOG in stormwater to less than 5 mg/l, an independent laboratory test was conducted by Fairway Labs in Altoona, PA. EPA method 1664A (Recommended Method for determination of oil and grease and total petroleum hydrocarbons in wastewater) was used to determine the presence of TOG in the water samples.
The following protocol was developed to simulate how the Drainiac® Petroleum Filter Valve would be used in the field, producing the water samples sent for analysis.
To demonstrate the consistency of Drainiac® Petroleum Filter Valves, two identical tests are performed using two separate 6” Drainiac® Petroleum Filter Valves.
For each test, the Drainiac® Petroleum Filter Valve is attached to a water collection vessel so that constant head pressure can be maintained through the filter valve.
After three minutes, collect grab sample of water outflow from the Filter Valve
Note: sample is taken after three minutes in order to capture enough water for the sample. Due to the swelling of the Drainiac® Polymers, water flow will be very slow.
Add 6” of water to the collection vessel.
Monitor for six minutes to confirm that all flow through the Filter Valve has stopped.
EPA Method 1664A ( (Recommended Method for Determination of Oil and Grease and Total Petroleum Hydrocarbons in Wastewater) was used to determine the presence of DF in the water samples.
No hydrocarbons were detected in the control samples of water.
All subsequent samples reported less than 5 mg/L of hydrocarbons.
The Fairway Laboratory Report dated 11/13/19 follows this summary.
M2C-2 samples were from the first Drainiac® Petroleum Filter Valve
M2C-3 samples were from the second Drainiac® Petroleum Filter Valve
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