The Nantucket Sewer Department reports as of December 8, 2020:
There are currently no MassDEP mandated PFAS testing requirements.
The Sewer Department is anticipating MassDEP requirements and has been preapring estimates and testing strategies.
The Sewer Department completes all MassDEP required permit testing as required daily, weekly and monthly. Sewer Department staff perform many of these tests in house but send a many samples to a certified Lab in Rhode Island. Current testing includes:
Daily PH influent and Effluent both plants (required MassDEP permit testing)
Daily Temps (required MassDEP permit testing)
Daily Nitrate, Nitrite, Nitrogen and Ammonia at both plants (required MassDEP permit testing)
Daily MLSS Mixed Liquor testing for Process control. Basically how many bugs and how much food in the system.
Weekly BOD-5 Biochemical Oxygen Demand testing both plants for MassDEP and Process control