OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00317
PWS Name: GATES, CITY OF
 
Who Was Contacted: Greg Benthin
Contact Phone: (Email address hidden)
Contact Date: 01/20/2026
Contacted By: WIKSTROM, CHANTAL (DWP)
Contact Method/Location: Email
 
Assistance Type: OTHER REGULATORY - Membrane parameters
Reasons: SWTR
Operations
 
Details: Gates' let me know that after completing the Direct Integrity Test (DIT) on the membrane filter train #2, he found the train exceeded the PDRmax. PDRmax for train 2 was 0.35 psi/min and the established setpoint is 0.23 psi/min. The operator let me know that he repaired the train 2 on 01/21 and it was placed back into service.

Calculating the LRV with the PDRmax result of 0.35 psi/min showed that the LRV was 3.82, normally their LRV is 4.77. It was determined that a Tier 2 notice was not needed.
 
Associated Alerts: ALERT IS NOT IN SDWIS YET

 
Associated Violations: VIOLATION IS NOT IN SDWIS YET