The U.S. Department of Agriculture’s (USDA) Forest Service requires the need to purchase market index price data to be used to achieve fair, objective, and transparent valuation and pricing measures f... The U.S. Department of Agriculture’s (USDA) Forest Service requires the need to purchase market index price data to be used to achieve fair, objective, and transparent valuation and pricing measures for Forest Service stumpage as provided herein. Product or Service Code (PSC): R702 – Support-Management: Data Collection. NAICS: 115310 - Support Activities for Forestry.