Series is created to document analysis of water samples that are water system related. Series is used to verify water quality. Records include raw analytical data (strip charts, turbidity, reports, bench sheets, logbooks, etc.) at the time of analysis. Records include all chemical, bacteriological and biological analysis done by the Water Bureau labs. Records include QA (quality assurance), QC (quality control) and calibration data. Series includes raw data compiled for EPA Reports (9611-03) and needed for lab certification.

Record Copy? Yes

RETENTION: Permanent. Microfilm after 1 year and destroy hard copy after film has been checked and verified. Produce 2 diazo copies and 1 silver (which is to be sent to SPARC).

Series is created to document summary analysis of water samples tested for the Water Bureau by contract labs. Records include all sheets submitted by contract labs for chemical, bacteriological and biological testing.

Record Copy? Yes

RETENTION: Permanent

Series is used to document analysis of certification samples sent by the Environmental Protection Agency (EPA). Records are used to maintain lab certification as required by the EPA. Records include summary sheet, EPA reporting forms, correspondence and other records generated for lab certification or EPA testing. Raw data records should be included with 9611-01.

Record Copy? Yes

RETENTION: 5 years