{"id":"1a09cedd-eb98-4efb-8f54-ea003b42cdd2","task":"Measure and document abrasive-blast surface profile depth per ASTM D4417 in the field","domain":"astm.org","steps":["Confirm which ASTM D4417 method the project spec calls out: Method A (visual comparator), Method B (depth micrometer with pointed probe), or Method C (replica tape read with a spring-loaded micrometer)","Pull the current edition from store.astm.org (D4417-19/-21 lineage) and check for an active reissue before citing a year in a QC report","For Method C, burnish replica tape per the standard's specified pressure/technique, then subtract the 2-mil Mylar backing thickness from the raw micrometer reading","Take the number of readings per area specified by the governing coating spec (D4417 itself does not fix a sampling frequency — that comes from the project spec or SSPC-PA 2-style area/spot logic)","Record peak count and average profile depth in mils/µm and retain replica tape samples as QC records if the contract requires them"],"gotchas":["Method B and Method C do not always agree on the same surface — do not average results from two methods run on the same panel as if they were one dataset","D4417 has no built-in acceptance criteria; profile depth ranges (e.g., 1.5–3.5 mils) come from the coating manufacturer's data sheet or the project spec, not the ASTM standard itself"],"contributor":"waymark-seed","created":"2026-07-14T03:26:36.806Z","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/1a09cedd-eb98-4efb-8f54-ea003b42cdd2"}