OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 00802
PWS Name: ARCH CAPE WATER DISTRICT
 
Who Was Contacted and Phone: Thomas Merrell (503) 687-4198
Contact Date: 09/08/2010
Contacted By: HOFELD, EVAN (REGION 1)
Contact Method/Location: Office
 
Assistance Type: WATER QUALITY ALERT RESPONSE
Reasons: Disinfection Byproducts
DBPs
 
Details: SUMMARY: TTHM result of 0.102 mg/l and HAA5 result of 0.12 mg/l sampled 8-26-10 DETAILS: Received an alert for TTHM results of 0.102 mg/l and HAA5 results of 0.12 mg/l from a sample taken 8-26-10. 3rd quarter 2010 RAA is 0.117 mg/l for TTHM and 0.129 mg/l for HAA5. System is under a Bilateral Compliance agreement to install membrane filtration with ACH coagulation for improved DBP precursor removal. Plans were reviewed and granted approval to proceed with construction on 12-23-09. System issued public notice 1st, 2nd, 3rd, and 4th quarter 2010 for the DBP MCL. ACTION NEEDED: System to proceed with membrane installation and continue to issue quarterly public notice as long as the DBP running annual average results exceed the MCL.
 
Associated Alerts: CHEM4362 - 09/08/2010 - TOTAL HALOACETIC ACIDS (HAA5) , TTHM

CHEM4362 - 09/08/2010 - TOTAL HALOACETIC ACIDS (HAA5) , TTHM


More information for this water system: SDWIS ID 3909
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