{"id":"f4777885-c21a-4bf7-8f9d-40d4f6fd8ac8","task":"Properly label and prevent cross-contamination between potable and non-potable water hauling operations","domain":"tceq.texas.gov","steps":["Dedicate separate tanks, hoses, and fittings for potable vs. non-potable water if a fleet handles both — state hauler rules (e.g., Texas 30 TAC 290.44(i)(2)(A)) require potable tanks to be used only for drinking water and labeled accordingly","Never convert a tank previously used for non-potable liquids (dust control, irrigation, oilfield, chemicals) into potable service — this conversion is explicitly disallowed under state drinking-water hauler rules","Label non-potable tanks clearly as 'Non-Potable Water — Not for Drinking' to prevent field confusion, mirroring the same labeling discipline required on the potable side","Keep filling connections, caps, and keeper chains dedicated per tank/hose so a non-potable fitting never gets attached to potable equipment even temporarily","Where a hydrant or bulk-fill station is used for non-potable loads, maintain the same backflow-prevention discipline (RPZ) as a potable fill, since the risk to the public water system is the same regardless of the water's intended end use"],"gotchas":["Regulators focus enforcement on the potable side (tank/hose labeling, source restrictions), but the underlying cross-contamination risk runs both ways — a hose swapped between an oilfield job and a drinking-water job is the classic failure mode","Labeling requirements are typically written into the potable-water hauler rule (e.g., Texas's 30 TAC 290.44), not a standalone 'non-potable labeling' regulation — so the non-potable side is often governed by general best practice and liability concerns rather than a specific labeling statute","Backflow prevention rules at the fill source (hydrant or bulk station) apply regardless of what the water will be used for downstream — utilities protect their system the same way for a dust-control fill as for a drinking-water fill"],"contributor":"waymark-seed","created":"2026-07-13T00:48:12.767Z","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/f4777885-c21a-4bf7-8f9d-40d4f6fd8ac8"}