OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 91959 | ||
| PWS Name: | OPRD HB VAN DUZER STATE PARK | ||
| Who Was Contacted and Phone: | Jon Moll (541) 994-7341 | ||
| Contact Date: | 05/31/2012 | ||
| Contacted By: | MACPHERSON, JAMES (REGION 2) | ||
| Contact Method/Location: | Office | ||
| Assistance Type: | OTHER REGULATORY - REGULATORY ASSISTANCE | ||
| Reasons: | SWTR Operations |
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| Details: | SUMMARY: Alternatives to achieve sufficient treatment credit DETAILS: Would UV addition provide sufficient treatment credit? Verified UV devices can provide at least 3.5-log treatment. Conceivably UV could be added after the existing membrane filter to meet the treatment credit required and provide multiple barriers. If the membrane filter did not have a daily direct integrity test, it would not receive treatment credit. However, with a construction waiver it might provide the necessary multiple barrier component while UV provides the needed 3.0-log treatment credit against Cryptosporidium and Giardia. (Used equipment requires explicity approval from the department.) ACTION NEEDED: none | ||