Short answer: Products must not include any BM-1 or LT-1 scores on their HPDs to qualify for Option 2 in Material Ingredients in LEED v4. This is an updated policy as of March 29, 2019 and is retroactive to previously published HPDs, as well as to HPDs published after this date.
This only addresses LEED v4. The LEED v4.1 requirements allow for more compliance options. Check for updated guidance here on that by mid-2019.
Here's a longer answer with more background:
For compliance with Option 2 of LEED v4 MRc: Building Product Disclosure and Optimization: Material Ingredients, HPDs are used to document products that have fully inventoried chemical ingredients to 100 ppm that have no GreenScreen Benchmark-1 (BM-1) hazards. The BM-1 score means that an ingredient is a chemical of high concern, whereas Benchmark-4 substances are safer and preferred, and BM-2 and BM-3 are in the middle.
In the GreenScreen® for Safer Chemicals system, Benchmark scores are based on a comprehensive toxicological assessment. GreenScreen's system also offers List Translator (LT) scores, which are based on screening of a substance against authoritative hazard lists. The GreenScreen score of LT-1 is applied to substances that have not undergone a full GreenScreen assessment, but if they did, would likely earn a BM-1 score. Thus LT-1 and BM-1 scores are derived in different ways but merit the same level of hazard concern.
HPDC and Clean Production Action (CPA), which operates GreenScreen, have jointly interpreted the LEED v4 credit language as applying equally to LT-1 and BM-1 substances, and the U.S. Green Building Council and GBCI also use this interpretation in identifying LEED-compliant HPDs.
One additional score is also relevant. In the GreenScreen system, LT-P1 scores mean that if a substance went through a full GreenScreen assessment, it would possibly be rated BM-1. When LEED v4 was first introduced in 2013, HPDC, CPA, USGBC, and GBCI jointly interpreted Option 2 as also excluding LT-P1 substances. However, the shared goal of these organizations is to encourage engagement with material transparency and health tools, and the market feedback has been that treating LT-P1 substances as equivalent to BM-1 is too restrictive at this time. Thus in coordination with USGBC's introduction of LEED v4.1 in 2019, HPDC has revised its guidance—and our LEED Pre-Check protocol—to allow for LT-P1 substances for Option 2 compliance. This change became effective in the HPD Builder and its LEED Pre-Check as of March 29, 2019.
In summary, BM-1 and LT-1 scores are not allowed for products to contribute to Material Ingredients Option 2, while all other GreenScreen Benchmark (BM) and List Translator (LT) scores are allowed.