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EXHIBIT "A" SCOPE OF WORK In addition to providing all material and labor, the Contractor shall perform the following: •CHES will set up the tanks and associated piping as close to the septage lagoons as possible; •CHES will pump the liquid material from the septage lagoons directly into the holding tanks; •CHES will follow the lime application procedure set forth by Kittitas County and the Department of Ecology; •CHES will place 50 pounds of lime per I 000 gallons of septage pumped into the tanks; •Kittitas County will supply the hydrated lime; •CHES' crew will be responsible for adding in the hydrated lime to the holding tanks as material is pumped in; •CHES will allow the hydrated lime to mix and stabilize for 30 minutes and ensure that the pH is a 12 or greater; •CHES will disperse the lime-stabilized solution via vacuum truck and spreader bar off of the truck; •CHES will spread the material under strict guidelines set forth by Kittitas County and the Department of Ecology; •CHES will only spread the material in approved areas determined by Kittitas County and the Department of Ecology; • After the application procedure has been completed, CHES will perform the interior cleaning of the holding tanks; •Any solids encountered will be directly managed by Kittitas County. It is unknown at this time the amount of solids to be expected. CHES will ensure that all solid materials encountered will be dealt with in accordance with local, state and federal laws; • If any waste is to be encountered -actual disposal amounts and associated costs will be determined once the waste profile has been approved, submitted and accepted into the disposal facility. Professional Services Agreement (rev. 11/08/2018) Page 14 of 19