Hi, this is Rebecca from Atelier Ten.

The LEED reference guide states that "Environmental Product Declarations which conform to ISO 14025, 14040, 14044, and EN 15804 or ISO 21930 and have at least a cradle to gate scope" are acceptable for documenting compliance.

I am interpreting this to mean that compliant EPDs must conform to ALL four standards:
-ISO 14025
-ISO 14040
-ISO 14044
-ISO 21930 or EN15804

Is this a correct interpretation of the reference guide, or is it acceptable for an EPD to conform to only a couple of the ISO standards listed above?

It's worth noting that the examples of acceptable EPD documentation shown in the reference guide do not mention all four standards.