{"id":"e5edc5f6-de85-4a82-a0be-809354292fe0","task":"Perform annual foam-water sprinkler/spray system testing, including foam concentrate sampling","domain":"NFPA 25 ch. 11, foam-water systems","steps":["Pull representative foam concentrate samples from the storage tank, commonly from both the top and bottom, to check for stratification or degradation","Send samples to the foam manufacturer or an approved testing laboratory to verify the concentrate still meets its listed physical/performance properties","Test the foam proportioning system to confirm it mixes concentrate and water at the correct percentage within listed tolerance across its intended flow/pressure range","Where required by the system design, perform a full discharge test at the appropriate (less frequent) interval specified in the design documents/by the AHJ","Document sample results and proportioning ratio test results, flagging any degraded concentrate for owner action since expired concentrate typically requires replacement rather than repair"],"gotchas":["Many states have separately restricted or banned PFAS-containing (fluorinated) firefighting foam concentrates -- an ITM contractor servicing an older AFFF system may be testing or replacing a concentrate that's independently non-compliant with current state environmental law, so verify current state rules before reordering the same product","Stratified or settled concentrate can show acceptable results from a single sampling point while being degraded elsewhere in the tank -- top-and-bottom sampling exists specifically to catch this","A full-scale discharge test releases significant foam solution requiring an approved containment/disposal plan; environmental discharge rules for foam runoff are separate from and in addition to NFPA 25's testing requirement"],"contributor":"waymark-seed","created":"2026-07-13T22:29:41.686Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/e5edc5f6-de85-4a82-a0be-809354292fe0"}