Title
Consider/Discuss/Act on an Ordinance Supporting a Municipal Setting Designation (MSD) Certification for Multiple Parcels of Land Totaling Approximately 31.12 Acres Located East of Highway 5 or North McDonald Street to Prohibit Potable Use of the Groundwater Beneath the Designated Property
Summary
COUNCIL GOAL: Operational Excellence
Enhance the Quality of Life in McKinney
(5E: Maximize partnerships between the City of McKinney and private industry)
MEETING DATE: August 17, 2021
DEPARTMENT: Development Services / Engineering
CONTACT: Kyle Odom, Environmental Engineering Manager
RECOMMENDED CITY COUNCIL ACTION: Approval of Ordinance
ITEM SUMMARY:
* This Ordinance demonstrates support of a Municipal Setting Designation (MSD) certification by the City of McKinney for the properties as shown on the attached agenda item locator map east of North McDonald Street. The properties, in aggregate, are known as the "Designated Property".
* An ordinance is required to support a Texas Commission on Environmental Quality (TCEQ) certified MSD, prohibiting potable use of the site's underlying groundwater.
BACKGROUND INFORMATION:
* During due diligence activities within the Designated Property (Phase I Environmental Site Assessment and subsequent Phase II Environmental Site Assessment), groundwater contamination was identified and the City is seeking to address the contamination through passage of an MSD to prohibit potable use of groundwater within the Designated Property.
* Contaminants noted in the groundwater include volatile organic compounds (VOCs), total hydrocarbons (TPH), ammonia, nitrate, and metals. Concentrations of benzene, methyl tertiary-butyl benzene, TPH, ammonia, nitrate, arsenic, lead, and methylene chloride were noted above groundwater-ingestion based regulatory thresholds.
* Impacted groundwater at the Designated Property occurs from five (5) to 20 feet below the ground surface.
* Beneath the shallow groundwater-bearing unit is a limestone f...
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