You can claim recycled content as a regional material, and you don't have to trace it back to its original extraction location. According to the LEED Reference Guide, the extraction point for recycled materials is the location of the raw material prior to the manufacturing of the final building product. That might be the recycling facility, scrapyard, depository, stockpile, or another location where the material was collected and packaged for market purchase before manufacturing. It is not necessary to track the raw material back to its original point of extraction.

Use replacement costs of salvaged materials (rather than actual costs) for all LEED materials calculations. For example, if you received free filing cabinets from a local office rehab you would use the cost of what you might spend on a filing cabinet if you had to replace the free one. This can work to your advantage, since the cost of used cabinets would probably be lower.

If a material is salvaged onsite and reused again onsite, you can count the site as both the manufacturing and extraction location. For example, old wood doors may be turned into custom tables. 

If a material is salvaged onsite and reused again onsite, you can count the site as both the manufacturing and extraction location. For example, parking lot concrete might be ground up and reused as infill on the same site.

Use the vendor or salvage location in place of the manufacturing location for salvaged, reused, or refurbished materials. Use the location from which the vendor salvaged the material in place of extraction location.

Follow special considerations for products that are salvaged or reused or have recycled content.

Salvaged or Reused Material, and Recycled Content

Request that manufacturers provide assembly information broken down by weight. 

The cost value for the LEED calculation is determined by weight as a percentage of the total. For example, a $100 piece of casework contains 20% wood manufactured and extracted locally, and 80% marble that was only manufactured locally. Since all of the material was manufactured locally, $100 goes towards the first point. Since only the wood was both manufactured and extracted locally, only $20 can count towards the second credit point.

The cost value for the LEED calculation is determined by weight as a percentage of the total. For example, a $100 piece of casework assembled locally contains 20% wood, and 80% marble, by weight, but only the wood was harvested and manufactured locally. Even though the piece of casework was manufactured and assembled locally, only $20 of the casework would contribute to this credit as being both manufactured and harvested locally.