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NC-v4 MRc4:Building product disclosure and optimization - material ingredients

Option 1 - HPD Residual Disclosure

Option 1 requirements state that for the HPD to be applicable, the “HPD standards for the 1,000-ppm level must be attained and the appropriate box on the summary page checked”. However, after reviewing several HPDs, it's apparent that the 1,000 ppm level of disclosure can be attained either through the “Measured 1,000 ppm” or “As per MSDS (1,000 ppm)”. Is anyone able to provide clarity as to whether either method of disclosure is acceptable to meet the credit requirements? Or how either method of disclosure to the 1,000 ppm level differs from the other?

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Paula Melton
Editorial Director
BuildingGreen, Inc.
LEEDuser Expert
159 thumbs up

Mon, 12/28/2015 - 14:48

Dalton, sorry I missed this before.MSDS level is 10,000 ppm for most substances and therefore does not meet the credit requirements. The HPD format is confusing that way.... HPDC now has guidance on its website about which boxes must be checked to meet credit requirements. Go to hpdcollaborative.org and hover over the "HPD Open Standard" dropdown, then choose "LEED v4 Credit Achievment."

Mon, 01/04/2016 - 17:33

Thanks for the reply Paula and pointing out the HPDC guidance. I guess my next question is how an MSDS at 1,000 ppm (not the typical 10,000 ppm) differs from the HPD "Measured at 1,000 ppm" given they're both at the same level. I've reached out to the HPDC but have yet to hear back. If you had any knowledge you could share on this it would be much appreciated!
Profile picture for user pmelton
Paula Melton
Editorial Director
BuildingGreen, Inc.
LEEDuser Expert
159 thumbs up

Mon, 01/04/2016 - 18:13

This is something I do not fully understand myself, but the answer is going to differ between v1 and v2 of the HPD. For v1, here is the guidance provided. Note that the MSDSes in question are NOT those of the product itself but those of the suppliers to the product manufacturer:
  • As reported by suppliers on MSDS: Fully disclose all residuals that exist in the product based on current MSDS requirements. It is acceptable to rely on MSDS disclosure from suppliers rather than perform direct measurements. Residuals that are identified as health hazards as per CFR 1910.1200 are disclosed at 0.1% (1000 ppm) for carcinogens and at 1% (10,000 ppm) for all other substances.

Wed, 03/30/2016 - 19:55

This is the official response I received from HPDC. Should help clear things up a bit. "The difference between "Measured 1,000 ppm” and "As per MSDS (1,000 ppm & 10,000 ppm)" is that MSDS information does not always represent the actual composition of the final material as it is just targeted toward occupational safety during manufacturing. i.e.: It is possible that residuals and impurities are listed without distinction or may not be included at all. Instead, "Measured 1,000 ppm” means all substances present at or above 1,000 ppm (0.1%) concentration in a material are listed without exclusions. "

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