Provide a signed contract from the contractor stating that they will only use products and materials meeting the requirements of the credit within the contract. Additionally, provide a narrative about the scope of the contractor. Are they cleaning the entire building? In order to meet the requirements, cleaning products used on the entire building must meet the requirements.
Question
We are using green cleaning contractor that will comply with 100% of the green requirements in LEED for materials and equipment. However, they do not have a way to track the quantity/cost of the actual products that are used at our project site because they use their products and equipment at various sites. How can we show that they comply with the requirements of this credit?