R2024-373 Resolution Accepting the Bid and Authorizing the Execution of a Purchase Order Furnishing Water Treatment Chemical - Carbon, #PUR2024-13

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Public Works DATE: 12/9/2024 MEMO: 2024-186 TO: Honorable Mayor Moore Wolfe and City Council Members FROM: Tim Gleason, City Manager Matthew C. Newell, P.E., Public Works Director Robert C. Weil, P.E., Water Production Manager SUBJECT: Resolution Accepting the Bid and Authorizing the Execution of a Purchase Order Furnishing Water Treatment Chemical-Carbon,#PUR2024-13 SUMMARY RECOMMENDATION: It is recommended that the City Council authorize the Mayor to sign,and the City Clerk to attest,a series of resolutions accepting the bids and authorizing the execution of purchase orders for furnishing water treatment chemicals for the year 2025, Purchase#PUR2024-13. BACKGROUND: The following is a list of the chemicals and how they are used in the water purification process. 1. Alum—to coagulate;clarifying agent 2. Carbon—used for taste and odor control;control of atrazine and other compounds 3. Carbon Dioxide—lowers the pH level 4. Chlorine—primary disinfectant 5. Hydrofluorosilicic Acid—reduces tooth decay 6. Lime—water softening agent 7. Sodium Chloride—used to regenerate the anionic exchange beds used for nitrate reduction 8. Sodium Chlorite—disinfectant;used for taste and odor control 9. Sodium Hexametaphosphate—used to counteract calcium hydroxide;prevents scaling;filter protection The City's buyer soliciting bids for all of the above chemicals,except alum. The alum supplier offered to extend the same price for another year,and this was seen as advantageous to the City and approved at the staff level. The selected bidders have provided the City with the necessary bonding,NSF and AWWA certifications required for their chemicals. The bid tabulation is attached in Exhibit A. For seven of the chemicals,staff is recommending that the low bidder receive the purchase order to supply those chemicals. In the case of Carbon,the low bidder is based both on price and performance.An outside lab tests a sample of each product and calculates a performance factor based on how much of the vendor's product it takes to remove the anticipated level of contamination. hi other words,a low number in the performance factor indicates a more effective product. The following is a calculation of how the low bidder was determined for Carbon: Vendor Product Price Quote/Ton Performance Factor Evaluation Score Carbon Activated RUWA-PL1500 $2,300.00 1.10 $2,530.00 Donau Watercarb 1000D $2,493.00 1.80 $4,487.40 Ingevity Aqua Nuchar $2,520.00 1.00 $2,520.00 Arq Carbpure TRA $2,900.00 1.30 $ 3,770.00 For Carbon Dioxide,staff is recommending that ILMO,the second-lowest bidder,receive the purchase order. The reasons for this recommendation are as follows: • The difference between the low bid and ILMO's bid is only$2,400 for the whole year(1.6%). • TT A40 hnc Haan nrnvirlina rnrhnn rlinvirla to tha urntar traatmant nlnnt rrnntiminncly fnr tha nnct fives vaarc•tlhav nra vanr