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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00466
PWS Name:	LANGLOIS WATER DISTRICT

Who Was Contacted and Phone:	Dave Terrusa (541) 348-2142
Contact Date:	03/15/2011
Contacted By:	CARR, BRAD (DWP)
Contact Method/Location:	Field

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

Details:	SUMMARY: CT Tracer Study DETAILS: The following memo is to outline the methodology that will be used to perform the contact tracer testing for the system. Langlois utilizes Floras Creek for its surface water source. Water is treated with rapid sand filters with flocculation along with soda ash and chlorine is used to treat water. Chlorine contact us achieved in the districts 100,000 gallon reservoir. Some contact time is achieved in the pre-chlorination process. Raw water is chlorinated prior to the WTP-- this water also goes through a 10,000 gallon settling tank. HBH was contacted by the district to provide assistance with a contact tracer study to determine the amount of contact time in the system prior to the first user. HBH met with Mr Terrusa, the system operator on-site to review the conditions for the tracer study. A memo was written up outlining the testing procedure. ACTION NEEDED: Complete tracer study.