OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 00722
PWS Name: HILAND WC - BOULDER CREEK
 
Who Was Contacted and Phone: Silas Olson (503) 537-4504
Contact Date: 01/29/2013
Contacted By: MACPHERSON, JAMES (REGION 2)
Contact Method/Location: Office
 
Assistance Type: PLAN REVIEW
Reasons: SWTR
None
 
Details: SUMMARY: Contact time DETAILS: Hiland proposes to install 8 inch pipe in a serpentine pattern to provide ~1,500 gallons of water between the treatment facility and the storage tank. This would generate a CT of 30 for a peak hourly flow rate of 50 gpm (anticipate actual flow at 30-35 gpm) at 6 C and chlorine residual of 1.0 mg/L for 0.5-log Giardia treatment. This is a valid means to generate contact time. It does not include contact time obtained from the reservoir. Hiland will send a written explanation of the proposal to add to the plan review #2010-115. ACTION NEEDED: none

More information for this water system: SDWIS ID 3400
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