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Water System Upgrade

Trinity Engineering designed a water treatment system to eliminate coliform exceedances and remove uranium from a public water system serving a school. The existing water supply is classified as a Transient Non-Community (TNC) system and consisted of a drilled bedrock well and underground concrete water storage tank. A sanitary survey determined that certain deficiencies existed. Trinity Engineering evaluated alternatives to address the issues raised in the sanitary survey. Trinity designed an ion exchange water treatment system in order to address the uranium found in the raw well water. New water storage tanks were designed to replace the existing underground storage tanks, which were responsible for recurrent coliform exceedances. New variable speed distribution pumps were added to deliver the finished water from the storage tanks throughout the facility. The ion exchange units have consistently reduced the uranium in the treated water to less than 1.0 ug/l. The drinking water standard for uranium in Vermont is 20 ug/l, the USEPA standard is 30 ug/l. The new tanks and distribution system have eliminated the recurrent coliform hits and provided a consistent quantity of water at steady pressure throughout the facility.

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