EQQ has long served environmental and compliance labs that need to produce the same regulatory cut every reporting period - identically, defensibly, and on a deadline. Here is the typical configuration we see.

Base configuration

  • One database scope per LIMS instance.
  • Roles: Chemist (read), QA (review + export), Compliance Officer (read + audit).
  • Queries authored by a senior chemist; reviewed by QA; flipped to Active only after sign-off.

Defensible reports

For each reporting period, a compliance officer runs the standard query suite. EQQ writes an audit record and the output file goes to a read-only archive. If a regulator asks “how did you produce this number?”, the answer is: “query version X, executed by user Y at time Z, with parameters P.”

Audit log: every run captured with user, query, parameters, timing.
Audit log: every run captured with user, query, parameters, timing.

Method-detection-limit reporting

Labs routinely need to join sample data with method metadata to produce MDL / LOQ reports. EQQ's Function library lets you standardize the MDL calculation once and reuse across every method in the lab.

Chain of custody

Because queries are immutable once Active (transitioning to Inactive or Void creates a new audit record), the number you reported last year is reproducible this year - a non-trivial property.

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Key Terms

  • LIMS - Laboratory Information Management System - software that manages lab samples, tests, instruments, and results.
  • MDL - Method Detection Limit - the lowest concentration of an analyte that a method can reliably detect above background noise.
  • LOQ - Limit of Quantification - the lowest concentration that can be measured with acceptable accuracy and precision.
  • QA - Quality Assurance - the systematic process of verifying that analytical results meet defined accuracy, precision, and traceability standards.