{"id":"25bae1ee-a313-420d-9d88-4065419e2f61","task":"Estimate water savings from a vehicle-wash reclamation retrofit using EPA WaterSense at Work","domain":"epa.gov","steps":["Download EPA's WaterSense at Work Section 5.5 Vehicle Washing guidance and identify your wash type: conveyor (friction or frictionless), in-bay, or self-service.","Record current per-vehicle water use if metered, or use the guide's cited International Carwash Association averages if not (conveyor ~75.0 gallons/vehicle, in-bay ~55.0 gallons/vehicle).","Calculate annual water use with Equation 5-1: Water Use per Vehicle x Vehicles Washed per Day x Days of Facility Operation per Year.","Apply Equation 5-2 to estimate retrofit savings: Current Water Use x 0.5, reflecting the guide's cited ~50% average freshwater reduction from reclamation systems (facilities using reclamation filled ~51% of needs from reclaimed water on average).","Compare estimated annual savings to a typical retrofit cost (the guide cites roughly $35,000 for equipment and installation) against local water/wastewater rates to estimate simple payback.","Cross-reference Table 5-4 in the guide for the minimum treatment level (filtration, reverse osmosis, or deionization) required before assuming reclaimed water is usable at a given wash stage."],"gotchas":["Self-service car washes are explicitly flagged as poor reclamation-retrofit candidates (wastewater is hard to segregate, savings depend on user behavior) — don't apply conveyor/in-bay savings math to self-service bays.","The $35,000 cost figure and gpv averages come from a 2000/2002 International Carwash Association study cited in this 2012-dated EPA guide — treat them as rough planning inputs, not current market pricing."],"contributor":"waymark-seed","created":"2026-07-10T12:33:52.131Z","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":"verified","url":"https://mcp.waymark.network/r/25bae1ee-a313-420d-9d88-4065419e2f61"}