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Item No: 7I <br />Meeting Date: October 26, 2009 <br />Type of Business: Council Business <br />Administrator Review: ____ <br /> <br />City of Mounds View Staff Report <br /> <br /> <br /> <br />To: Honorable Mayor and City Council <br />From: Nick DeBar, PW Director / Mike Schnur, Lead Utility Operator <br />Item Title/Subject: Resolution 7518 Authorizing Replacement Purchase of Chemical <br />Scales and Chemical Switch-Over Units <br /> <br />Introduction: <br />Water Treatment Plant No. 1 (WTP#1) was constructed in 1992 and has the original chemical tank <br />switch-over units still in use. The chemicals used to treat the raw ground water to drinking water <br />standards rely are fed through these units as part of the treatment process. Currently, the switch-over <br />units do not switch-over automatically to a secondary tank. When the tank becomes empty, the switch <br />over is done manually by hand. This can lead to either not feeding chemicals into the water for a short <br />period of time that it goes unnoticed (at nights or weekends), or switching over the tank before it’s <br />completely empty. <br /> <br />WTP#1 had a Sulpher Dioxide scale replaced in 1998 and that scale is showing signs of failure. In <br />addition, the chemical scales at WTP No. 2 and 3 are also failing. The digital display won’t display from <br />time to time, and although it has always come back, eventually it won’t. These scales are how we verify <br />our chemical feed dose in the water in accordance with Minnesota Department of Health Standards. <br /> <br />Discussion: <br />Public Works has received verbal quotes to replace the three scales and two switch over units. The <br />following are the three quotes received: <br /> <br />1. Larsco: $5,985 ($1,575 each for the scales, and $630 each for the switch-over units) <br />2. Vesco: $7,110 ($2,370 each for the scales, and no quote given for the switch-over units) <br />3. Hawkins: $6,600 ($2,200 each for the scales, and no quote given for the switch-over units) <br /> <br />No quotes were obtained for the switch-over units from Vesco or Hawkins since they would not provide <br />them as part of the scale price. However, the quote from Larsco with the unit prices for switch-over units <br />was still less than Vesco and Hawkins. <br /> <br />This equipment replacement was not expected. This was not included in the adopted 2009 budget. <br />However, monies are available in the designated account for this type of purchase. Account 700-4823- <br />7030, Water Infrastructure & Equipment Maintenance-Capital Equipment has $10,000 budgeted for the <br />water tower assessment. There is also $5,000 for the water tower evaluation in this fund under 700- <br />4823-3030 - other professional services that the contracted study is being paid from. Therefore, staff <br />recommends funding the purchase of the chemical scales and switch-over units from account 700-4823- <br />7030. <br /> <br />Recommendation: <br />Staff recommends adopting Resolution 7518, which would authorize the purchase of three chemical <br />scales and two chemical switch over units from Larsco Inc. for the total price of $5,985 plus tax and <br />shipping. <br /> <br />Respectfully submitted, <br /> <br /> <br /> <br />Nick DeBar - Public Works Director