ChillerSamples.xlsx

This is a data spreadsheet documenting Legionella and water testing samples collected from chiller systems across multiple Veterans Affairs facilities nationwide. The spreadsheet contains records from 23 Veterans Integrated Service Networks (VISNs) and tracks detailed information about water samples collected from chillers and cooling systems at VA medical centers and hospitals, including building numbers, sample identification numbers, collection dates, sampling reasons (system startup, routine quarterly sampling, post-remediation sampling, and investigation of suspected cases), sample sources (supply to chiller, return from chiller, other), sample types, sample volumes, water temperatures, biocide types and levels, pH measurements, and the names of individuals who collected samples. The data also documents laboratory analysis results, including which laboratories performed Legionella testing (including vendors such as Hyperion Biotechnology, EMLab P&K, HGS Engineering, Phigenics, NALCO, and Aerobiology Laboratory), dates samples were submitted to and received from laboratories, laboratory sample identification numbers, PCR detection results, and storage information for samples retained for future molecular typing.

The spreadsheet serves as a comprehensive tracking and management system for water testing compliance and health surveillance across the VA healthcare system. It captures both positive and negative Legionella detection results and includes personnel accountable for sample collection from various facilities, enabling the VA to maintain documentation of its water quality monitoring program for infection control and prevention purposes. The data spans multiple fiscal periods and facilities, providing historical records necessary for trending analysis and regulatory compliance reporting related to water-borne pathogen prevention in VA buildings housing overnight populations.