WSP10769

• File Number: 8220.105
• Description: Colorado River-Water Projects-Navajo
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 7/1/2001
• Author: BOR
• Title: Revised Draft Environmental Assessment for the Jicarilla Apache Nation Water Subcontract-aka USBR/PNM Water Contract Renewal and Extension
• Water Supply Pro - Doc Type: Report/Study

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hot summer months when demand for electricity typically peaks. Depending on the results of the retrofit,
PNM may decide to convert an additional two cells from wet/dry to wet, which would be an additional
increase of water consumption by an estimated 1,477 AF per year. Despite the increased water usage
projected for the unit 3 cooling tower. PNM expects to have sufficient water available for its operations
when the contract amount of 16.200 AF is combined with the 8.000 AF available from BHP. Therefore,
no change in contracted water usage is proposed.

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5.5 Ash Handling System

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Fly ash and bottom ash continue to be handled as described in the 1977 EIS. Ash is fed from collection
bins into trucks and hauled to the coal mine, where it is buried in the open mine pits, backfilled, and
reclaimed (USBR 1977).

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5.6

Gypsum Handling System

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Gypsum, (calcium sulfate) is the. byproduct from the new limestone FGD system (sulfur dioxide +
calcium carbonate) It is processed through a filter press to obtain dry product and then conveyed to a pile
for storage. The gypsum is then hauled by truck to the coal mine where it is buried in the open mine pits,
backfilled. and the surface reclaimed.

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6.0 AFFECTED ENVIRONMENT AND ENVIRONMENTAL CONSEQUENCES

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This section provides descriptions of components of the environment potentially affected by the proposed
action, and discussions of possible consequences. The areas addressed by this environmental assessment
contain no portions of scenic or wild and scenic rivers, portions of rivers placed on the nationwide river
inventory, refuges, wilderness areas, wilderness study areas, or prime or unique farmlands.

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6.1 Air Quality

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SJGS operates in compliance with all applicable state and federal air quality regulations. These
regulations include. but are not limited to, the following:
. Air Quality Construction Permit
. Operating Permit Program
. SO" NO" and Particulate Emission Regulations
. Acid Rain Program
. New Source Performance Standards

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6,1.1 Description or Current Air Emissions Control Equipment

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The principal components of the air emission controls include the limestone SO, removal equipment and
particulate removal equipment. A complete description of the particulate removal equipment in operation
at SJGS is provided in the 1977 SJGS EIS. No significant changes in particulate removal equipment have
been made since that time.

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The new FGD system is a limestone-based. flue gas scrubbing system designed to remove sulfur dioxide
from the flue gas produced by Units 1 through 4 ofSJGS. The FGD system is a limestone throwaway
system. Limestone is the reactant for the chemical reaction between the SO, and the calcium carbonate

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