540 
TABLE 2 —- CAPITAL AND OPERATING COSTS FOR VARIOUS-SIZED ECOROCK UNITS 
Annual 
Dry Sludge 
Processing Operating Costs** 
Capacity $/Ton of 
Tons Per Day Tons Per Year Capital Costs* Sludge Total 
20 7 ,000 $ 4,000,000 $97 $ 679,000 
200 70 ,000 15,900 ,000 66 4,620,000 | 
400 140 ,000 24,100 ,000 63 8,820 ,000 
20 TPD suitable for a city the size of Bridgeport, Charlotte, 
Sacramento, Tucson 
200 TPD suitable for a city the size of Philadelphia, Detroit, 
San Francisco 
400 TPD suitable for a city the size of New York City, Chicago, 
Washington, D.C. 
* - 1982 dollars 
* —- Includes capital charges 
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