## Development of Chemical Precipitation Operation and Maintenance Costs: **Sludge Disposal**

This Excel workbook consists of the following worksheets:

kpk_021_All_effluents_at_CP_p Notes Sludge Density Additional information regarding the query performed to extract pertinant information from the Steam Electric Survey Database. This Excel workbook document EPA's derivation of the dewatered sludge generation rate for plants operating chemical precipitation treatment of FGD wastewater. It also documents EPA's determination of the density of dewatered sludge. The sludge generation rate and density are used to calculate sludge disposal costs for chemical precipitation.
Documents the development of dewatered sludge generation rate using certain plant responses to the Steam Electric Survey . To select plant responses used to develop the cost factors, EPA extracted sludge generation rates for all wastewater treatment sy stems for plants operating chemical precipitation systems (as marked in B7-4).
Documents the calculation of the density of dewatered sludge generated by chemical precipitation.

## Development of Chemical Precipitation Operation and Maintenance Costs:

Additional information regarding the query performed to extract pertinant information from This Excel workbook document EPA's derivation of the dewatered sludge generation rate for plants operating chemical precipitation treatment of FGD wastewater. It also documents EPA's determination of the density of dewatered sludge. The

Documents the development of dewatered sludge generation rate using certain plant responses to the Steam Electric Survey . To select plant responses used to develop the cost factors, EPA extracted sludge generation rates for all wastewater treatment sy stems for plants operating chemical precipitation sy stems (as marked in B7-4).
Documents the calculation of the density of dewatered sludge generated by chemical

### All plant-level data has been removed from this tab as a result of CBI sanitization. All data for wastewater treatment systems

**used to determine dewatered sludge generation factors is considered CBI or CBI deducible.**

### All plant-level data has been removed from this tab as a result of CBI sanitization. All data for wastewater treatment systems **used to determine dewatered sludge generation factors is considered CBI or CBI deducible.**Notes

Contains data from the following survey questions: A1-1 Plant Nam e B7-4 FGD purge wastewater treatment B5-2 Purge flow D2-7 WWT Sy stems D3-3 Effluents

Purpose: Lists all waste streams and solids amount for all W WT sy stems at plants that have CP sy stems (as marked in B7-4) as well as the sum of purge flow rates for the plant. Note: while only plants with CP systems are included, some of these plants have multiple treatment sy stems, including non-CP sy stems. All of the sy stems (including non-CP sy stems) are included. Also, where m ultiple effluents are present for one plant, the same purge flow rate will be listed multiple times. This purge flow rate is already a sum across all of the plants FGD sy stems and therefore, should NOT be summed across effluent streams. W here CBI shows -1, the purge flow rate is CBI.