OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00452
Who Was Contacted and Phone: Jim Anderson (503) 864-3119
Contact Date: 07/12/2010
Contacted By: GENTRY, CARRIE (DWP)
Contact Method/Location: Office
Reasons: N/A
Details: SUMMARY: Incident due to chemical mislabeling DETAILS: Jim called to discuss an incident that happened 7/9/10. Citys operator was transferring sodium hypochlorite from Cascade Columbia carboy to mixing tank. Chemical reaction with gas release took place, so building was vacated. An estimated 1 gallon of the chemical was transferred from carboy to tank before being shut off. Tank was still pumping small amounts to system (flow based). Chemical was citric acid, mixed approx 1 gal acid to 10 gals of sodium hypochlorite solution. Cascade Columbia carboy was mislabeled at their production facility. ACTION NEEDED: No additional action is needed. Amount of citric acid pumped from the day tank to the 500,000 gallon reservoir in the 5-10 minute time period would be negligible. System monitors pH downstream of reservoir, and pH was not affected.

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