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NELSON READY MIX <br /> Report of Contaminated Soils Excavation <br /> ' Page: 3 <br /> foot The weight of damp sand / gravel was taken to be 110 lbs /cubic foot <br /> Consequently, the weight of a damp loose cubic foot of sand / gravel is calculated to be 88 <br /> tlbs/cubic foot <br /> VOLUME OF THE EXCAVATION <br /> EXCAVATION 50 feet x 20 feet x 17 feet deep = 17,000 ft3 <br /> LESS OLD DIESEL TANK 4000 gallons 535 ft3 <br /> VOLUME OF SAND/GRAVEL REMOVED 16465 ft3 <br /> ' DRY WEIGHT OF SAND/GRAVEL REMOVED(100 lbs per ft3) 1646500 lbs (823 tons) <br /> ASSUME A MOISTURE CONTENT OF 10% (110 LBS per ft3) <br /> DAMP WEIGHT OF SAND/GRAVEL REMOVED 1811150 lbs (906 tons) <br /> VOLUME OF EXCAVATION CALCULATED FROM STOCKPILED SOILS <br /> Length(ft) Width(ft) Max Height Avg Hetght(ft) Volume(ft3) <br /> ' Pile 1 30 24 12 55 3960 <br /> Pile 2 50 24 10 6 7200 <br /> Pile 3 30 15 8 55 2475 <br /> ' Pile 4 30 15 6 4 1800 <br /> Pile 5 30 15 9 6 2700 <br /> Pile 6 30 15 6 4 1800 <br /> TOTAL 19935 <br /> ' SWELL= [(EXCAVATED VOLUME) - (CALCULATED VOLUME)]/(CALCULATED VOLUME) <br /> SWELL = [(l 9935 ft3) -(16465 ft3)] 1 (15465 ft3) = 21% <br /> WEIGHT OF 1 CUBIC FOOT OF DAMP, LOOSE SOIL = (110 LBS)X1 011 2=88 LBS <br /> Figure 2, adapted from the Wright Environmental Services report, shows the approximate <br /> ' location of the piles of excavated soil and the locations of the samples taken by the <br /> technician <br /> tThe weight of diesel in the area of the excavation and the weight of diesel removed are <br /> given in the following two tables <br /> 1 <br /> 1 <br />