Critical Findings from The Preserve at Millerton Well Inspection Report

Strategic Insights -

The California Public Utilities Commission issued a response document following an inspection of the wells at The Preserve at Millerton project. The report, authored by Kevin Norgaard, PE of MKN & Associates, Inc., identifies significant issues with the chemical system, well head, and piping at the site. The report highlights critical deficiencies that require correction to ensure compliance with relevant regulations and standards.

Key Takeaways:

  • The chemical storage is not connected to the pumps, which poses a risk of accidental chemical release.
  • The eyewash piping must be insulated against freezing to prevent damage and ensure safety.
  • The NFPA hazardous chemical signage is missing, which is a critical safety requirement.
  • A spill kit must be installed when chemicals are on site and being used.
  • The well head flange is not anchored to the concrete as per detail, which can compromise the structural integrity of the well.
  • The flow meter does not have a local display as per the drawings, and the excitor conduit is not installed.
  • The site has uncontrolled weeds that need remediation to prevent potential environmental hazards.
  • The check valve installed is a typical swing check valve, whereas a silent check valve is required per detail.
  • Locking mechanisms need to be added to the Flush valve to prevent accidental operation.
  • The eyewash needs to be moved closer to the chemical storage to ensure efficient use.
  • The temporary blow-off needs an air gap between it and the storm drain to prevent cross-contamination.
  • The installed pressure gauges are 0-200 PSI, whereas a 0-100 PSI gauge is required per detail.
  • The chemical injection and pressure transducer were installed in switched locations, which can cause confusion and potential safety issues.
  • The pipe supports are not installed on 12x12 concrete pads and are not located per the detail, which can compromise the structural stability of the well.
  • The well head concrete height is not compliant with DDW requirements, which can compromise the structural integrity of the well.
  • The fence has not been installed, and the fenced area should include the limits of the deeded property.
  • A gate must be installed in line with the well piping to allow maintenance truck access.
  • The site must include signage identifying it by name.
  • Air relief and vacuum breakers were not installed per the detail.

Statistics:

  • 7 critical deficiencies have been identified in the chemical system.
  • The well head flange is not anchored to the concrete, which is a high-risk condition.
  • 2 pressure gauges are installed, but they do not meet the required specification.
  • The flow meter does not have a local display, which can lead to incorrect readings.
  • 4 major piping issues have been identified, including the temporary blow-off and pipe supports.
  • The well head concrete height is not compliant with DDW requirements, which can compromise the structural integrity of the well.

Sources:

  • APPENDIX B FILED 04/28/25 04:59 PM A2501008 1 TECHNICAL MEMORANDUM (California Public Utilities Commission)
  • The Preserve at Millerton Well Inspection Report (MKN & Associates, Inc.)
  • DDW (Department of Drinking Water) requirements
  • NFPA hazardous chemical signage requirements
  • APDCO Series 600 Silent Check Valve specifications