Quality Assurance

Each analysis starts off with a calibration curve, which must meet criteria before proceeding with the analyses. Each analysis has measures of accuracy and precision, as well as monitoring of background contamination through analysis of method and instrument blanks.

Routine QC reports include a method blank, laboratory control sample, matrix spike and duplicate analyses. In addition to the daily routine analyses for quality, Caltest participates in programmatic QC for the National Environmental Laboratory Accreditation Program (NELAP), U.S. Army Corps of Engineers, and specific commercial and federal clients.

When samples are received they are given unique identifying numbers before being made available to the lab staff in the central refrigerators. Lab numbers are tracked throughout the entire process. Once an analysis is complete, almost all of the lab results are automatically downloaded into our LIMS system eliminating the chance of data recording errors. Dilution factors are applied in the download system as entered by the analyst at the time of the dilution. If a project manager or a client desires a recheck of the analyses, calculations and data entry are rechecked, and finally if no error is found, three additional aliquots of the sample are prepared for analyses to compare with the original value.

All containers purchased for use as sample containers are pre analyzed by the vendor or analyzed by Caltest by lot to ensure suitability with the requirements the containers will be used for.

In the event of equipment failure, most of Caltest's instruments have redundant backup. We have service contracts to speed the time of repair, and expedite parts and service with overnight service.