OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 00236
PWS Name: COTTAGE GROVE, CITY OF
 
Who Was Contacted and Phone: Ray Pardee (541) 228-0179
Contact Date: 07/30/2009
Contacted By: POTTS, JOHN (DWP)
Contact Method/Location: Field
 
Assistance Type: CIRCUIT RIDER ASSISTANCE
Reasons: N/A
N/A
 
Details: SUMMARY: Tracer Study preliminary visit DETAILS: PWS has recently activated a new membrane WTP at the Row River WTP facility replacing the existing package treatment plant. DWP is requiring a chlorine contact time tracer study as the flow has increased greater than 10%. Effluent flow meters are installed after the clearwell and after the two reservoirs. I met with Ray to conduct a preliminary review of plant facilities, sampling locations, SCADA capability, flow and dosage records and set up an appointment to meet with DWP personnel on 8/5/09 to review and approve my CT study protocol. There is a high probability that several hours of chlorine contact time will occur through the entire clearwell and reservoir system based on theoretical calculations. ACTION NEEDED: Conduct tracer study in mid to late August.

More information for this water system: SDWIS ID 4293
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