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U.S. STEEL DUQUESNE WORKS<br />

HAER No. PA-115<br />

(Page 92)<br />

corner of the building. The feed pumps which were associated<br />

with the tank have been removed.<br />

Construction and Installation Date: 1979.<br />

L. Sulfuric Acid Feed station: Located at the southern end of<br />

the evaporative cooling tower, the sulfuric acid feed station<br />

consists of a Sharpsville manufactured 4,000 gallon capacity<br />

carbon steel sulfuric acid storage tank set inside of a lime<br />

filled pit, and two 10.3 gph metering pumps manufactured by the<br />

Milton Roy Company. The pumps are powered by two 1/2 hp integral<br />

motors rated at 1725 rpm.<br />

Installation Date: 1979.<br />

M. Blast Furnace Numbers Three and Four Chemical Additive<br />

Building and Associated Chemical Feed Equipment: Located just<br />

west of the gas cleaning equipment at blast furnace number three<br />

is an approximately lO'-O" wide x 3 0*-0" long x 10'-0" high<br />

cinder block building. A 5'-4" diameter x 12 , -0" long carbon<br />

steel chemical storage tank with a capacity of 2000 gallons,<br />

manufactured by the Betz Company, is located in the southeast<br />

corner of the building.<br />

Construction and Installation Date: 1979.<br />

N. Evaporative Control Building and Associated Electrical<br />

Equipment: The 14*-0" wide x 120'-0" long x 10'-0" high control<br />

building for the evaporative water treatment recycle system is<br />

attached to the western side of blow engine house number three.<br />

Set upon a concrete foundation, the cinder block building houses<br />

the main control panel for the evaporative water treatment<br />

recycle system at its northern end and electrical circuit<br />

breakers for the system at its southern end.<br />

Construction and Installation Date: 1979.<br />

O. Non-Evaporative Gas Washer Hotwell and Gas Washer Hotwell<br />

Pumps: The gas washer hotwell for the non-evaporative water<br />

treatment recycle system is located approximately 4 0*-0"<br />

northeast of the hot blast stoves for Dorothy Six. It is<br />

composed of an 184,000 gallon capacity underground concrete basin<br />

measuring 32'-6" wide x 40'-0" long x 19'-0" high. Water is<br />

allowed into or diverted away from the hotwell by separate sluice<br />

gates. Two 3000 gpm Wilson-Snyder vertical pumps are located<br />

above ground over the hotwell. Each pump is powered by a 400 hp<br />

U. S. Electrical Titan Line motor rated at 1180 rpm.<br />

Construction and Installation Date: 198 0.<br />

P. Non-Evaporative Gas Cooler Hotwell and Gas Cooler Hotwell<br />

Pumps: The gas cooler hotwell for the non-evaporative water<br />

treatment recycle system is located adjacent to the gas washer<br />

hotwell on its northern side. The 19'-6" wide x 40 , -0 M long x

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