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Sanitary engineer seeks $7,400 to add polyphosphate dosing and booster work for Elm Road water project
Summary
Sanitary-engineer staff told commissioners that the EPA requires adding poly‑ortho‑phosphate dosing to the Elm Road booster‑station project to prevent internal pipe scaling; staff requested $7,400 for the dosing device and noted ongoing chemical costs and pressure‑assurance work.
Sanitary-engineer staff presented Items 13–14 including a personnel hire and technical changes to the Elm Road booster‑station water project. Paul Martin introduced the hire of Michael Sarchick as a draftsperson to replace an earlier resignation.
On the Elm Road booster work, sanitary‑engineering staff said the EPA is requiring poly‑ortho‑phosphate be added to the water to prevent scale from forming and flaking inside pipes. The work would add a dosing feed system and an upfront device; the additional construction/installation line was estimated at $7,400, and staff said there will be an ongoing chemical cost for replenishing the treatment media.
The sanitary engineer described the dosing as continuous: a vessel with poly‑phosphate and a dosage tube feeding milliliters per thousand gallons into the flow. Staff also emphasized pressure goals for the system — aiming for at least 60 PSI at the northern terminal of Mount Road and up to 70 PSI at the Elm Road intersection — and noted a temporary booster pump installed to serve a local business until the permanent works are completed.
Commissioners asked clarifying questions about frequency and whether the cost was one‑time; staff said the $7,400 was for equipment and installation and that chemical purchases would recur. The transcript records the request and technical explanation but does not show a final vote approving the expenditure in the excerpt provided.
