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Groundwater treatment proposal for MTBE removal, Jan 2002
Machine-extracted title · confidence 95%Technical proposal describing a groundwater treatment system designed to remove MTBE from sumping water at the World Trade Center site in January 2002.
NYC-WTC_000186628–000186629Page image
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NYC 9/11 Public Portal Document
GROUND/WATER TREATMENT & TECHNOLOGY, INC. P.O. BOX 1174 DENVILLE, NEW JERSEY 07834 Phone (973) 983-0901 • Fax (973) 983-0903
Project: Treatment of Ground Water for the Removal of MTBE Location: World Trade Center, New York Client: Moretrench American Corporation Date: January 9, 2002
Process Flow Description
This system has been design for the anticipated flow rate of 350 gpm.
The source of the water requiring treatment is from the sumping operation required to maintain a dry excavation of the former World Trade Center
Anticipated pumping duration is twelve months
Discharge to the combine sewer system is regulated by the New York City Department of Environmental Protection, Bureau of Wastewater Treatment. A sample of the discharge has been tested and the results are attached. The contaminate of concern is MTBE (Methyl Tertiary Butyl Ether) which is a gasoline additive. MTBE is highly soluble in water and therefore difficult to remove.
Major System Components and Function (Additional detail is attached)
Influent Equalization Tank
This tank is 8 feet in diameter, 11 feet tall and has a capacity of 4,000 gallons. This tank provides an 11-minute retention time. The purpose of this tank is to reduce flow surges to the treatment plant by equalizing flow. The tank is constructed of Linear Polyethylene and rated for industrial use. The water is pumped from this tank by a Duplex Pumping System.
Duplex Pumping System
The pumps to be provided are manufactured by Aurora Pump and are rated for a flow rate of 350 gpm at 110 feet of head. The specific model number is 340/360-encl-3600 with a 4x4x7b impeller. The break horse power is 17.0 however we have installed a 25 hp motor so that the pumps would be suitable for additional flow from the well system if required. A duplex pumping system is provided so that one pump is available in the event of pump failure. Throttling valves and pressure gages will be provided. These pumps convey the water through a bag filtration system.
CITY_21MC100_000644277 NYC-WTC_000186628
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NYC-WTC_000186628Source: NYC Law Department, mirrored locally
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