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| IOWA | |
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| Request use of LDO to EPA Region 7. » Region 7 LDO Suggested Request Letter » Hach Method 10360 » EPA Hach method Approval Letter » ASTM Standard D888-05 Approval Letter » EPA/ASTM Validation Study |
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| Iowa City Laboratory University Hygienic Laboratory |
(319) 335-4500 or toll-free (800) 421-IOWA (4692) |
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