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- Long Duration Foam Wins Job, Saves Money -
TCE and Vinyl Chloride Emission Control
- Boston Third Harbor Tunnel - Odor and Vector Control
- Manufactured Gas Plant - Odor and VOC Control
- Sludge Landfill - Odor Control
- Landfill Closure - Odor Control
- Hazardous Landfill Excavation - VOC Control, Vertical Surface
- Buried Waste Containment - Soil Excavation, Emission Abatement
- Sun Oil Vapor Recovery System - Hydrocarbon Vapor Suppression
- In-Transit Sludge - Odor Control
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Long Duration Foam Wins Job, Saves Money -
TCE and Vinyl Chloride Emission Control
Products & Equipment Used:
• AC-645
• AC-904
• PFU400/25
Application Summary:
Kelchner Environmental, Inc., a remediation and civil construction contractor in Dayton, OH, was awarded a remediation contract by a major private sector client at an active manufacturing plant located in Sanborn, NY. The original engineering design required construction of a temporary structure to cover the entire footprint of the excavation/treatment area, and required crews working inside the building to be in Level B PPE. Kelchner proposed an alternative plan - to control TCE and vinyl chloride emissions by applying Rusmar AC-645 and AC-904 products using a PFU400/25 Pneumatic Foam Unit.
Rusmar worked closely with Kelchner during the bidding process to provide documentation supporting the performance of Long Duration Foam. Case histories and test data supplied by Rusmar won the support of the design engineers, and because Kelchner could eliminate the cost of a temporary structure from their proposal, the savings won them the job.
The project required excavation of 5,000 tons of soil containing TCE in concentrations exceeding 10,000 ppm and placement of the contaminated soil in an ex-situ treatment cell constructed on site. A critical factor in the engineer's design was concern over exposure to air-borne concentrations of TCE and vinyl chloride during excavation, as concentrations were expected to exceed IDLH levels. Controlling these emissions was of utmost concern because the plant is located adjacent to several residences.
During excavation of the contaminated soil, foam was applied when instrumentation at strategic monitoring locations indicated that TCE or vinyl chloride concentrations exceeded action levels. Within minutes of applying the foam, air-borne concentrations were reduced from thousands of parts per million to background levels. Consequently, work crews were able to work in Level C PPE with the excavation and treatment cell construction tasks completed in a little over one week. The on-site representative of the New York State Department of Environmental Conservation gave the products his unqualified approval.
The use of Long Duration Foam enabled work to be performed in Level C rather then Level B PPE and shortened the duration of fieldwork at the site. Kelchner estimates Rusmar saved their client close to $100,000.00 while still achieving the technical requirements of the project.
Boston Third Harbor Tunnel - Odor and Vector Control
Products & Equipment Used:
• Pneumatic Foam Unit 1600/40
• AC-912 Long Duration Foam
Application Summary:
The joint venture of Bechtel National-Parsons Brinckerhoff required an odor emission suppressant during the dredging phase of the Boston Third Harbor Tunnel Construction Project. A landfill cell had been constructed on Logan Airport property for the dredged marine sediments, and Bechtel-Parsons was concerned that the sediments would present an odor problem as the material dried. Not only would nearby residents and airport personnel consider the odors offensive, but there was additional concern that seagulls would be attracted to the sediments, causing potential interference with the flight path of airplanes during take-off.
The Massachusetts Department of Environmental Protection was familiar with the effectiveness of Rusmar Incorporated Long Duration Foam products from a previous large scale project which required odor control. Rusmar AC-912 was chosen for its ability to form an impermeable membrane that would control odors and emissions for a period up to three months. The subcontractor, MKIW-Third Harbor Tunnel Constructors, applied Rusmar AC-912 Long Duration Foam product over each load of marine sediments that were deposited into the landfill cell. Approximately 100,000 yd3 of material were deposited into the cell over a 5 - 6 month period. There were no odor complaints from nearby residents or airport personnel, and the deposited sediments went undetected by seagulls.
Manufactured Gas Plant - Odor and VOC Control
Products & Equipment Used:
• AC-645 Long Duration Foam
• AC-904 Long Duration Foam
• Pneumatic Foam Unit 400/25
Application Summary:
Rusmar Long Duration Foam products have been used at numerous manufactured gas plant facilities. Often, tanks containing coal tar were filled with soil and other debris from the site before being abandoned.
Old manufactured gas plants are usually located in the center of the town near residential and industrial facilities. Therefore, the control of odors and VOCs, particularly benzene, is very important. The excavation plans usually require that the soil be stabilized prior to being shipped off site for disposal. Rusmar Long Duration Foam is used to control both the odors and VOCs.
During periods of warm weather,when there are emission problems during the stabilization process, AC-645 is applied over the top layer of contaminated soil during active excavations to control emissions. The worst emission problems occur when the contaminated soil is allowed to sit dormant for an extended period of time, particularly overnight. Rusmar AC-645 Long Duration Foam is applied over the top layer of contaminated soil to control emissions when control requirements do not exceed eighteen (18) hours.
If the emission control requirements exceed eighteen (18) hours, such as on weekend or holiday shutdowns, AC-904 Long Duration Foam is applied over the contaminated soil. The AC-904 Long Duration Foam provides superior emission control for up to ten (10) days.
The Pneumatic Foam Unit 400/25 can be used to apply both foam products. The unit is self contained and simple to operate.
Sludge Landfill - Odor Control
Products & Equipment Used:
• Pneumatic Foam Unit 1600/40
• AC-920 Long Duration Foam
Application Summary:
The Lynn (MA) Water and Sewer Commission's incinerator, dedicated for burning secondary sewage sludge, was shut down because of stack emissions that exceeded regulatory standards. The sludge that was usually burned had to be placed directly in a landfill. During warm weather, off-gases from the sludge created a significant odor problem. Rusmar Incorporated's AC-920 Long Duration Foam was applied over approximately 2 1/2 acres of the affected area. After the application of foam, the odors were eliminated. The AC-920 Long Duration Foam membrane remained intact for six months, long enough for the sludge to decompose to a point where odor was no longer a problem.
Landfill Closure - Odor Control
Products & Equipment Used:
• Pneumatic Foam Unit 1600/40
• AC-645 Long Duration Foam
• AC-904 Long Duration Foam
Application summary:
The Michigan Department of Natural Resources required an emissions control measure during the closure of an Ann Arbor Solid Waste Landfill cell. The odors that were emanating from the landfill during the grading process were so severe that residents in the adjacent neighborhood complained to the City of Ann Arbor on a constant basis.
Rusmar Incorporated's AC-645 Long Duration Foam was applied to the surface immediately behind each of the graders. The AC-904 Long Duration Foam was utilized to control odors for periods up to two weeks during holiday shut downs and for weekend coverage. Rusmar Incorporated's Long Duration Foam was so effective in controlling odors, neighborhood complaints to the City of Ann Arbor ceased immediately upon the first application of foam.
Hazardous Landfill Excavation - VOC Control, Vertical Surface
Products & Equipment Used:
• Pneumatic Foam Unit 1600/40
• AC-912 Long Duration Foam
Application summary:
Management at the Adams Center (IN) Commercial Hazardous Waste Landfill detected contaminants in their secondary leachate containment system, indicating a leak in the liner system. They decided to excavate the immediate area in order to repair the liner. This entailed excavating approximately 3 to 4 acres along a vertical surface. Rusmar Incorporated's AC-912 Long Duration Foam product was chosen to control emissions during the excavation because of its reputation of success with emissions control on vertical surfaces and its ability to control emissions for a minimum period of three months. The liner system was repaired and there were no emissions problems or complaints during the excavation.
Buried Waste Containment - Soil Excavation, Emission Abatement
Products & Equipment Used:
• Pneumatic Foam Unit 400/25
• Bulk Storage & Dilution System (BSD)
• AC-645 Long Duration Foam
• AC-904 Long Duration Foam
Application Summary:
Uniroyal Chemical disposed of an extensive list of waste chemicals collected in unlined pits. This was normal before hazardous waste regulation in Canada prohibited such practices.
Uniroyal Chemical contacted Conestoga-Rovers and Associates, Ltd. to develop and oversee a remediation plan for closing the pits. A significant part of the plan addressed emissions control during excavation and several alternatives were considered.
In a pilot test at Uniroyal Chemical, it was determined that foam technology did an outstanding job of providing emissions attenuation during excavation.
Uniroyal Chemical, Conestoga-Rovers and Ambler-Courtney, Ltd. (who was awarded the clean-up contract), agreed to use Rusmar Incorporated AC-645 and AC-904 Long Duration Foam because of their superior performance and cost effectiveness, as well as the user-friendliness of the dispensing equipment. Rusmar Incorporated delivered bulk quantities of foam concentrate, which afforded the customer a superior logistical set-up - no additional labor was required for drum handling or disposal, system preparation, cleanup, etc. Additionally, the bulk set-up successfully addressed a critical lead-time for future chemical requirement. This requirement was critical because of the magnitude of the excavation (approximately 30,000 cubic yards) and the strict deadline that was placed on the completion of the project. The project was completed in approximately 2 months with no delays due to emissions.
Sun Oil Vapor Recovery System - Hydrocarbon Vapor Suppression
Products & Equipment Used:
• Pneumatic Foam Unit NTC 8
• AC-645 Long Duration Foam
Application Summary:
Mid Atlantic Constructors installed a vapor recovery system at the Sun Oil Marcus Hook (PA) Refinery. This involved connecting vapor return pipes to the existing pipe structure at a dock used to load and unload ships and barges. The pipes were to be connected via welding which had to take place over a drip pan. On several occasions, Sun Oil tried to clean the pan by high pressure washing, but were unable to get a clean vapor reading. The inability to guarantee that the pan would not catch fire was a safety risk that neither Sun Oil nor Mid Atlantic Constructors were willing to take. Sun Oil was familiar with Rusmar Incorporated from previous use during the Middle Creek Abatement Project. Sun Oil recommended that Mid Atlantic Constructors utilize Rusmar AC-645 Long Duration Foam to suppress the vapors. Once the foam was applied to the pan, no vapor readings were detected. The entire welding project was completed, without incident, thanks to the superior vapor suppression properties of the AC-645 foam.
In-Transit Sludge - Odor Control
Products & Equipment Used:
• Pneumatic Foam Unit NT/5 (ELECTRIC)
• AC-904 (BLACK) Long Duration Foam
• AC-905 (RED) Long Duration Foam
Application Summary:
The Lynn (MA) Water and Sewer Commission's (LWSC) incinerator, dedicated for burning sewage sludge, was shut down because of emissions that exceeded regulatory limits. LWSC contracted Waste Management of Boston/North, Inc. to have the sludges transported to Waste Management's Turnkey Landfill facility. This entailed trucking the sludges through 7 miles of a heavily populated residential area. Odor complaints to the mayor's office necessitated that Waste Management and the LWSC to come up with a remedy.
Rusmar Incorporated AC-904 (Black) product was applied atop each truckload of sludge material prior to leaving the LWSC facility, and the odor complaints ceased immediately.
At a DOT checkpoint en route to Turnkey Landfill, a DOT representative noticed that one of the sludge trucks was not tarp covered. This was because Rusmar Incorporated's AC-904 (Black) foam product had fully formed a membrane, which took on the characteristic look and color of the sewage sludge. The tarp was not needed, but the DOT representative was not convinced. Rusmar Incorporated developed AC-904 (Red) foam to clearly show that the sludge transport vehicles were covered effectively when traveling at speeds up to 65 MPH, and this problem was also resolved.
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