Environmental Equipment Rental
Cox-Colvin & Associates rents the following environmental remediation systems for long- and short-term projects:
Air Sparge/Soil Vapor Extraction (AS/SVE) Trailer Unit - $5,500/mo
Cox-Colvin's AS/SVE rental unit is capable of sparging and/or extracting from multiple points to provide effective remediation of VOCs in both vadose zone soil and groundwater consisting of sands and gravels to silty sands. Once extracted, the VOC-contaminated vapor stream is sent through an air/water separator to remove any water, prior to passing through the extraction blower. If a large volume of water generation is anticipated, a water holding tank also is available for rent. After exiting the blower, the VOC-contaminated vapor stream enters the granular activated carbon (GAC) vessel, is treated, and discharged to the atmosphere through a stack in the trailer. During operation, totalized VOC concentrations prior to and after GAC treatment are measured and displayed through in-line photoionization detectors (PIDs). The sparge and extraction flows also are able to be viewed. An alarm transmittal and data acquisition system is incorporated into the unit which is capable of transmitting/storing system alarms and continuously logging influent and effluent PID readings, SVE air flow, and SVE vacuum.
AS/SVE System specifications
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High Vacuum Dual Phase Extraction (HVDPE) Trailer Unit - $5,500/mo
Cox-Colvin's HVDPE rental unit is capable of extracting from multiple points to provide effective remediation of VOCs in vadose zone soil (silty clays to tills) or bedrock (fractured and/or weakly cemented sandstone). Once extracted, the VOC-contaminated vapor stream is sent through an air/water separator to remove any water, prior to passing through the extraction pump. If a large amount of water generation is anticipated, a water holding tank also is available for rent. After exiting the pump, the VOC-contaminated vapor stream is cooled by an air-to-air heat exchanger then passes through a condensate tank before entering the granular activated carbon (GAC) vessel. The GAC vessel is staged outside the trailer; therefore, multiple vessels may be utilized in series, if desired. After passing through the GAC vessel(s), the treated vapor stream is discharged to the atmosphere. During operation, totalized VOC concentrations prior to GAC treatment are measured and displayed through an in-line photoionization detector (PID). The extraction flow also is able to be viewed. An alarm transmittal and data acquisition system is incorporated into the unit which is capable of transmitting/storing system alarms and continuously logging influent PID readings, air flow, vacuum, and water volume pumped from the air/water separator.
HVDPE System specifications
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Water Treatment Trailer Unit - $6,500/mo
Cox-Colvin's water treatment trailer rental unit, which currently holds an Ohio EPA state-wide permit-to-install (PTI), is capable of operating up to four submersible or sump pumps at a combined rate of up to 35 gallons per minute (gpm) to provide effective remediation of VOCs and SVOCs in groundwater or surface water. Once pumped, the contaminated water stream(s) is sent through a basket strainer and into an oil/water separator where any light non-aqueous phase liquid (LNAPL) is separated out and stored within the oil/water separator or gravity flows to an optional product holding tank located outside the trailer. After passing through the oil/water separator, water gravity flows through an air stripper and into a transfer tank. The air stream from the air stripper is discharged, through a stack in the trailer, to the atmosphere or first through an optional 450 or 1,000 pound vapor phase granular activated carbon (GAC) vessel located outside the trailer. Water within the transfer tank is automatically pumped through two bag filters (in parallel), followed by two liquid phase GAC vessels (in series), and discharged out the trailer to an appropriate location. During operation, totalized water flow, instantaneous water flow rate, LEL within the trailer, and LEL at the water discharge (if possible) are measured and displayed. An alarm transmittal and data acquisition system is incorporated into the unit which is capable of transmitting/storing system alarms and continuously logging totalized water flow and instantaneous water flow rate. The interior of the trailer is temperature controlled and also is capable of operating heated hoses for water flowing into and out of the trailer during winter months. Discharge of treated water must be performed in accordance with the requirements of the PTI and an NPDES permit/POTW authorization.
Water Treatment specifications