source:
  type: guide
  id: fnma-sel-b4-2.1-05
  authority: Fannie Mae Selling Guide B4-2.1-05 — Unacceptable Environmental Hazards
  description: Fannie Mae Selling Guide B4-2.1-05 — Unacceptable Environmental Hazards.
  coverage_tier: operative
obligations:
- id: fnma-sel-b4-2.1-05-full
  canonical_id: fnma-sel-b4-2.1-05-full
  section: Fannie Mae Selling Guide B4-2.1-05 — Unacceptable Environmental Hazards
  type: do
  tags:
  - regulator-direct
  - fnma
  - selling-guide
  - corpus-expansion
  - tier-operative
  primary_source:
    tier: 1
    authority: Fannie Mae Selling Guide B4-2.1-05 — Unacceptable Environmental Hazards
    source_class: fnma-guide
    source_url: https://singlefamily.fanniemae.com/media/document/pdf/selling-guide
    snapshot_id: 5f7b8b79da595d76
    fetched_at: '2026-05-25T14:09:57Z'
    content_hash: sha256:98cf85a02861bbe84914a0e339b327c8fc131869a8a573882007bbeea60c5701
    paragraph_quote: 'B4-2.1-05, Unacceptable Environmental Hazards (06/03/2020) Introduction
      This topic contains information on unacceptable environmental hazards, including:
      Overview Published May 6, 2026 652 Unacceptable Environmental Hazards Overview
      The existence of one or more unacceptable environmental hazards generally will
      result in a project being ineligible. In addition, some properties that fail
      to meet a particular standard may be corrected through remedial action. See
      B4-2.1-06, Remedial Actions for Environmental Hazard Assessments Below Standards.
      Unacceptable Environmental Hazards The table below describes examples of unacceptable
      environmental hazards; however, this list is not exhaustive. ✓ Examples of Unacceptable
      Environmental Hazards a property that is (or has been) used as a landﬁll or
      other solid, hazardous, or municipal waste disposal site a property that is
      (or has been) used for activity related to the storage of oil, hazardous waste,
      or other toxic substances—except that the property may have been used for the
      storage of small quantities of hazardous substances that are generally recognized
      as appropriate for residential uses and maintenance of the property a property
      that is the subject of outstanding environmental or public health litigation
      or administrative action from private parties or public oﬃcials a high-risk
      neighboring property that has evidence of hazardous waste spills or soil or
      groundwater contamination on or around its site a property that has documented
      soil or groundwater contamination and/or a documented tank leak that is leaking
      at more than 0.05 gallons per hour (which is the National Fire Protection Association’s
      standard) Published May 6, 2026 653 ✓ Examples of Unacceptable Environmental
      Hazards a property with soil sampling that has values for metal in excess of
      the following concentration limits in parts per million (ppm): • chromium: 100
      ppm • arsenic: 20 ppm • zinc: 350 ppm • cadmium: 3 ppm • lead: 100 ppm • nickel:
      100 ppm • copper: 170 ppm • selenium: 20 ppm a property that is contaminated
      from polychlorinated biphenyls (PCBs) a property with soil sampling that has
      values for other organic materials in excess of the following concentration
      limits in parts per million (ppm): • total volatile organics: 1 ppm • total
      hydrocarbons: 100 ppm • total petroleum hydrocarbons: 100 ppm a property with
      groundwater sampling that has values for other organic materials in excess of
      the following concentration limits in parts per million: • total organics (volatiles
      and base neutrals): 0.10 ppm • total petroleum hydrocarbons: 1.00 ppm a property
      with groundwater sampling that has values for metals in excess of the following
      concentration limits in parts per million: • arsenic: 0.05 ppm • lead: 0.05
      ppm • boron: 1.00 ppm • mercury: 0.002 ppm • cadmium: 0.01 ppm • selenium: 0.01
      ppm • chromium: 0.05 ppm • silver: 0.05 ppm a property with high radon levels
      (e.g., above four picocuries per liter) that can be corrected only through large
      capital improvements or extensive ongoing maintenance programs that are beyond
      the ﬁnancial or technical abilities of the HOA or co-op corporation for the
      project Published May 6, 2026 654 ✓ Examples of Unacceptable Environmental Hazards
      a property that has conditions representing material violations of applicable
      local, state, or federal environmental or public health statutes and laws a
      property that is contaminated by friable asbestos-containing materials Recent
      Related Announcements The table below provides references to recently issued
      Announcements that are related to this topic. Announcements Issue Date Announcement
      SEL-2020-03 June 03, 2020'
  judgment: false
