PLACERVILLE, CALIFORNIA

News

Reservoir A chlorine conversion advances

By From page B1 | January 21, 2013

Bidding is expected in March for the Reservoir A chlorine conversion project, according to a Jan. 14 report to the El Dorado Irrigation District board by Accounting Manager Tony Pasquarello.

Currently estimated at $1.75 million, the board authorized materials and capitalized labor costs of $76,000 as the project design continues by district staff.

The schedule faces a deadline to avoid having to recertify the facility’s use of chlorine gas.

“The first critical task involves setup of a temporary sodium hydroxide feed system that will then allow demolition of the existing line silo and lime slurry feed system to make room for the new sodium hypochlorite feed system,” Pasqaurello wrote.

The materials purchased, totaling $58,000 off the $76,000 CIP approved Jan. 14, include a 6,600-gallon chemical storage tank, secondary containment berm, pump enclosure and a new programmable logic controller that must be installed and programmed before the project is turned over to a general contractor.

Chlorine gas is inherently dangerous and requires  constant training, vigilance and recertification of the personnel and facility. Converting to sodium hypochlorite, similar to what is used in swimming pools, replaces a poisonous gas with an inert liquid.

Reservoir A is on Pleasant Valley Road east of Diamond Springs.

Michael Raffety

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