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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00507
PWS Name:	MAPLETON WATER DISTRICT

Who Was Contacted and Phone:	Terry Saubert (541) 268-4348
Contact Date:	04/22/2009
Contacted By:	POTTS, JOHN (DWP)
Contact Method/Location:	Field

Assistance Type:	CIRCUIT RIDER ASSISTANCE
Reasons:	N/A N/A

Details:	SUMMARY: Tracer Study DETAILS: System has installed a new membrane filtration plant and a tracer study has been required by Amy Parmenter, DWP. The maximum design flow is 280 gpm, which is higher than the previous WTP output. I met with Terry on 4/2/09 to conduct the tracer study. The WTP was set at 280 gpm flow and chlorine dosage was set to obtain an increase of 2.0 mgl residual so an increase of 0.2 mgl would be used as the t10. I evaluated the residual measurements over the time span of the study and determined that 52 minutes of contact time would be the established value. I also started the report preparation. ACTION NEEDED: Complete the tracer study report.