{
  "schema_version": "2.0.0",
  "source_index_schema_version": "2.0.0",
  "manifest_kind": "heavy_metal_index_evidence_packet",
  "retrieval_timestamp": "2026-09-20T15:58:29.716Z",
  "page": {
    "slug": "sources/authors2016-comparison-of-lead-and-tin-concentrations-in-air",
    "title": "Comparison of Lead and Tin Concentrations in Air at a Solder",
    "description": null,
    "page_type": "source",
    "audience": [],
    "canonical_url": "https://heavymetalindex.com/sources/authors2016-comparison-of-lead-and-tin-concentrations-in-air",
    "wiki_doi": null
  },
  "content_pin": {
    "status": "preserved_verified_git",
    "reason": null,
    "content_hash_scheme": "sha256-utf8-authored-markdown-v2",
    "content_hash_description": "Strip leading YAML; remove only generated hmi-page-history and hmi-page-references marker blocks; trim trailing whitespace and append one LF. Other Markdown bytes are preserved.",
    "content_sha256": "8cc17ccc3249a2e8a191b5a6ccb1bbb18f6b930b619a634fccd9db591a5c279a",
    "content_bytes": 6322,
    "metadata_sha256": "98e36b51cdde2515491f587d9898f9b3d35af3b2a40f1106ce61ec70e0938319",
    "metadata_hash_description": "SHA-256 of recursively key-sorted JSON from parsed YAML, excluding updated and numeric sources (generated display metadata). All other frontmatter fields are included.",
    "published_body_sha256": "9076a4f584d6a446198141824dfb27edfe182fd4c61eeb240ee874d56e4747ba",
    "published_body_bytes": 6560,
    "published_checksum_note": "Published-body and full-Markdown checksums describe the build input, including generated display sections. They are not claimed to equal the Git revision's display sections.",
    "markdown_sha256": "510fecab539d10512938b574c65a0f8e34e71b06df90268826b1bd2cef390e70",
    "markdown_bytes": 7522,
    "git_commit_sha": "70e164c26892e9564cf209039385a2a03079e1e1",
    "last_commit_sha": "5552206e60d4a0b568d15a388b5589d7a469d871",
    "last_commit_date": "2026-09-10",
    "git_remote": "https://github.com/paleofoundation/heavymetalindex",
    "verify_command": "node tools/verify-evidence-packet.mjs --commit 70e164c26892e9564cf209039385a2a03079e1e1 --slug sources/authors2016-comparison-of-lead-and-tin-concentrations-in-air --sha256 8cc17ccc3249a2e8a191b5a6ccb1bbb18f6b930b619a634fccd9db591a5c279a --metadata-sha256 98e36b51cdde2515491f587d9898f9b3d35af3b2a40f1106ce61ec70e0938319"
  },
  "contributing_sources": [],
  "data_downloads": [],
  "ingest_contract": {
    "metadata_complete": false,
    "ingest_complete": false,
    "gaps": [
      "evidence_fitness"
    ],
    "completion_note": "Metadata completeness alone does not prove extraction, routing, or primary-source coverage. Completed ingest requires its reconciliation and route audits."
  },
  "license": {
    "prose": "CC BY 4.0",
    "structured_data": "EU database rights reserved — see https://heavymetalindex.com/licensing",
    "attribution": "Heavy Metal Index (heavymetalindex.com), Institute of Contaminant Standards. Cite canonical_url or wiki_doi.",
    "contact": "karen@paleofoundation.com"
  },
  "attestation": {
    "for_use": "Citation, regulatory submission, or peer-review supplementary record.",
    "verifiable_by": "The verify_command checks the authored Markdown and semantic frontmatter against the named Git revision using the documented canonical hash scheme. Generated history and reference blocks are excluded from that pin; separate published checksums include them.",
    "not_a_certification": "This manifest records publication provenance. It does not certify products or independently validate the page's scientific claims.",
    "license_terms": "https://heavymetalindex.com/licensing"
  },
  "generated_at": "2026-09-14T11:17:46.199Z"
}