Clean water: Biosolids inspections

Prepare for the inspection

We’ll review these records.
Each Colorado Discharge Permit System permit has different record-keeping requirements. The best way to prepare for an inspection is to review the requirements of your facility's permit, but generally, you’ll need to have available the past five years of:

  • Annual biosolids reports.
  • Records of biosolids quantity and disposition, for example, beneficial use, disposal.
  • Sampling and testing records (where, how, frequency, results) for pathogen reduction, vector attraction reduction and metals.
  • Notice of Authorization for land application sites.*
  • Field application records and soil analysis records.*
  • List of current biosolids application sites and locations.*

We may ask for other records.
*These records may be provided by a contractor to the permittee. Biosolids generators are responsible for records, even if they use a contractor. The contractor should provide records and reports to the generator.

We may conduct a field review.
Depending on the location and inspection goals, a field review of the biosolids handling facilities may be conducted.

Inspection frequency

  • Generally, every one to five years, depending on facility size and other factors.
  • We have the authority to inspect CDPS-permitted facilities without advance notice.

After the inspection

  • We’ll document the CDPS inspection findings in a letter sent out approximately 45 days after the inspection.
  • We request the permittee respond in writing to violations 30 days after the inspection letter date with a plan to address any violations.