{"id":"334b58da-1176-4a86-933e-23c15e1cdf2f","task":"Comply with the Secretary of the Interior's Standards for masonry cleaning and repair on a federal tax-credit rehabilitation project","domain":"nps.gov","steps":["Confirm the project is pursuing the Federal Historic Preservation Tax Incentives 20% credit, which requires the work to meet the Secretary of the Interior's Standards for Rehabilitation.","Submit the masonry repair/cleaning scope in the Part 2 'Description of Rehabilitation' application to the State Historic Preservation Office and NPS before starting irreversible work.","Ensure the proposed cleaning method avoids sandblasting or other abrasive/chemical treatments that damage historic material, consistent with Standard 6 and Preservation Brief 6.","Document mortar color/profile matching and repair scope with photographs and material samples for the NPS reviewer's record.","If work started before approval, expect NPS/SHPO to require retroactive review and possible remediation before certifying the project."],"gotchas":["NPS reviews the completed work (Part 3) against the approved Part 2 scope; unapproved deviations such as a cement-rich mortar or an aggressive cleaner can cause credit denial.","SHPO review timelines and fee schedules vary by state and change periodically -- verify current turnaround directly with the state office rather than assuming a fixed national timeline.","The Standards judge exterior appearance and material compatibility, not exact historic chemistry -- don't over-specify an identical mortar recipe as a compliance requirement."],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","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/334b58da-1176-4a86-933e-23c15e1cdf2f"}