DDW-2024-007534

May 9, 2024
Jason Wayne Taylor
South Salt Lake City Water System
195 West Oakland Avenue
Salt Lake City, Utah 84115
Subject:Operating Permit, Well Cleaning and Redevelopment with Pump Upgrade for the 700 E Replacement Well (WS012) and 700 E Replacement FL_CL-Polyphosphate (TP015); South Salt Lake
City, System #18032, File #12684
Dear Jason Taylor:The Division of Drinking Water (the Division) received your request for the Operating Permit for the rehabilitation of 700 E Replacement Well (WS012) and Polyphosphate
Injection (TP015) from your consultant Sam Fankhauser of AE2S on February 23, 2024. The updates on the project were received by Division staff on April 12, 2024. The Division issued
Plan Approval for this project on August 27, 2021.Our understanding of the project was to clean and rehabilitate the existing 700 E Replacement Well (referenced as WS012 in our database).
The process included the removal of the pumping equipment, brush and bailing, chemical treatment, surging and pumping to remove treatment chemicals, chlorination, surging and pumping
to remove residual chlorine, well development, installation of a new pumping system, and disinfection chlorination of the well and pumping equipment. Water sampling and bacteriological
analysis was performed following disinfection to ensure the well was free of coliform bacteria and suitable for reconnection to the system. Specifications submitted by Hansen, Allen,
& Luce Inc. stated that all chemicals were NSF 60 certified.South Salt Lake City Water System (the System) replaced the existing well pump with a new pump at the 700 E Replacement Well
(WS012). The existing well pump was a 200 HP National M14MC 5 Stage Submersible Pumping System with a design capacity of 1,500 gallons per minute (gpm) against a 440-foot total dynamic
head (TDH). The replaced well pump is a 200 hp American Marsh 13MC 7 Stage Vertical Turbine Pipe System with a 10-inch diameter impeller, with a design capacity of 1,200 (gpm) against
a 505 feet total dynamic head (TDH).700 E Replacement Fl_Cl_Polyphosphate (TP013)Based on multiple customers' complaints due to brown-colored water, the System also installed a phosphate
injection system at 700 E Replacement Well (WS012) to control Manganese and Iron from precipitating into the tanks and distribution system. The phosphate injection has maintained Iron
and Manganese in a soluble state.Our understanding of the phosphate feeding system is the following:The Polyphosphate Injection (TP015) system injects polyphosphate into the drinking
water from the 700 E Replacement Well (WS012) located at 3180 S 700 East to ensure the iron and manganese currently detected in the drinking water remains in its dissolved form.The
level of manganese at the 700 E Replacement Well (WS012) is 0.1mg/L, and is above the Secondary Maximum Contaminant Level of 0.05 mg/L.The level of iron at the 700 E Replacement Well
(WS012) is 0.24 mg/L, and is below the Secondary Maximum Contaminant Level of 0.3 mg/L.NSF 60 Polyphosphates (All-Qwest 100) are injected at a dose of 0.7 mg/L before the chlorine injection.The
feed rate is adjusted by the flow rate which varies from 1000 gpm to 1500 gpm.We have received the following information for the Rehabilitation of the Hamilton Well (WS002) and Polyphosphates
Injection (TP015) system:1. Certification of Rule Conformance with plan approval conditions by a professional engineer.2. Satisfactory bacteriological results as evidence of proper
disinfection and flushing.We have determined that all conditions for operating permit issuance have been met. On this basis, an Operating Permit for rehabilitation of 700 E Replacement
Well (WS012) and 700 E FL_CL-Polyphosphate (TP015) are hereby issued as constituted by this letter. You may now place these facilities in service in your water system.Please maintain
a copy of this letter with your permanent records for future reference.Drinking Water Source Protection RequirementThe Division has not received an updated Drinking Water Source Protection
(DWSP) plan for the 700 E Replacement Well, which was due by December 31, 2020. A deficiency (SP04 ACTIVE SOURCE LACKS APPROVED UPDATES TO DWSP PLAN) has been added to the Division’s
database and 5 Improvement Priority System (IPS) points were assigned. If you have questions about these points, please contact Jennifer Yee at [phone] or via email at [e-mail].
While not a requirement of the R309-600 Rule, you may re-delineate the DWSP zones for this source based on the smaller design capacity of the pump. If you have questions about the source
protection requirements, please contact Deidre Beck at [phone] or via email at [e-mail].
If you have any questions regarding this Operating Permit, please contact Nagendra Dev, P.E., of this office, at [phone], or Michael Newberry, P.E., Permitting and Engineering
Manager, at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
ND/DLB/mrn/mdbcc: Matthias Neville, Salt Lake County Health Department, [e-mail]
Jason Wayne Taylor, South Salt Lake City Water System, [e-mail]
Kai Krieger, Hansen, Allen, & Luce Inc, [e-mail]
Deidre Beck, P.G., Division of Drinking, [e-mail]
Sitara Federico, Division of Drinking Water, [e-mail]
Nagendra Dev, P.E., Division of Drinking Water, [e-mail] OP Well rehab Polyphosphate WS012 TP015 18032 12684