What is the maximum allowable time for samples to be submitted to the laboratory?

The maximum allowable time for samples to be submitted to the laboratory is 30 hours. This timeframe is established to ensure that the integrity and quality of the water samples are maintained before analysis. Delays beyond this period may lead to changes in the chemical composition or microbial community of the water, which can skew results and render them unreliable.

In surface water testing, the preservation of samples is critical as various factors, such as temperature fluctuations and exposure to light, can alter the water's characteristics. Submitting samples within this 30-hour window helps assure that they accurately reflect the conditions of the water body at the time of collection. This is essential for compliance with regulatory requirements and for conducting effective water quality assessments.