Title
Contract No. 1803685
Aluminum Sulfate, Liquid Alum
Body
Agenda of: June 26, 2019
Item No.: 2019-222
Amount: Three (3) Year Contract $ 9,953,250.00
First Year Renewal Option 3,317,750.00
Second Year Renewal Option 3,317,750.00
Total $16,588,750.00
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Sue F. McCormick
Chief Executive Officer
Great Lakes Water Authority
DATE: June 4, 2019
RE: Contract No. 1803685
Aluminum Sulfate, Liquid Alum
Vendor: Chemtrade Chemicals US, LLC
MOTION
Upon recommendation of Cheryl Porter, Chief Operating Officer - Water and Field Services, the Board of Directors (Board) of the Great Lakes Water Authority (GLWA), authorizes the Chief Executive Officer (CEO) to enter into Contract No. 1803685 "Aluminum Sulfate, Liquid Alum" with Chemtrade Chemicals US, LLC, in the amount of $9,953,250.00 for three (3) years, with two (2) one (1) year renewal options at a cost of $3,317,750.00 for each renewal year for a total contract amount of $16,588,750.00; and also authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
Aluminum Sulfate (Alum), when added to raw water, reacts with the alkalinity present in water causing suspended particles to form larger particles for removal. These large particles of suspended matter in raw water can be removed by allowing them to settle to the bottom of a sedimentation basin. However, there are smaller particles in surface water that do not settle out within a reasonable time without help to accelerate the process. These smaller particles, normally referred to as non-settleable solids, usually consist of a combination of biological organisms, bacteria, viruses, protozoan, color, organic matter and inorganic solids. The term turbidity is applied to all suspended solids in water.
To effectively remove the suspended solids (turbidity), the size of the smaller particles needs to be increa...
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