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MEMORANDUM I <br /> TO: Kirk Brooks <br /> FROM: Jane 2immerman <br /> DATE: August 13, 1992 <br /> SUBJECT: Boeing 40-41 Site Work and Utilities, <br /> Plan Review <br /> At the field visit to Hoeing's proposed 40-41 building site <br /> yesterday, I wae able to get information on some of tha <br /> i questions I had regarding the future use of this site. <br />� Activities on the fatigue test slab could produce hydraulic <br />` fluids from failed testing equipment. Normally, the slab <br /> area would be routed to the storm system. in the event of a <br /> spill, a valve would be closed and the spill and subsequent <br />( wash water would be routed to the sanitary sewer through an <br /> oil/water separator. This proposal may or may not be <br /> I acceptable to IPT - they should be contacted. In any event, <br />� sizinq calculations must be submitted for the separator. <br /> Criteria to be used ehould include the anticipated <br /> I� concentration and size of oil droplets, and the anticipated <br /> I flows through the separator. A description of the <br /> procedures to be followed after a spill should be included, <br /> for example, w111 the spill be washed off the slab with <br />� water? Or is a combination of soap and water normally used? <br /> What is the anticipated rate of flow off of the slab due to <br /> wash off of spills? Will a fire hose be used? <br /> I <br /> Most of my concerns are with the operating procedures <br /> surroundinq the use of the fatigue slab area, in particular <br />' that a valve must be closed to prevent contamination of <br />� surface waters. <br /> Boeing indicated that a trench system would be used around <br /> the edge of the slab. To increase the likelihood that the <br /> valve would be closed in time, the slab should be sloped to <br /> the north, with the trench system sloped back to the south, <br /> with the oil/water separator located to the south also. <br /> This set-up would increase the amount of time available to <br /> close the valve, and would decrease the chance that the <br /> spill would reach surface waters. The valve area should be <br /> clearly designated, with signs indicating the location of <br /> the valve and its purpose. <br /> Another possibility would be the use of an oil stop valve. <br /> The valve would be set so that a certain concentration of <br /> hydraulic fluid would close the valve and cause flows to be <br />