Specifications include, but are not limited to: Contractor shall clean the tank and existing fuel within, reducing environmental contaminants to conform to ASTM Standard levels. Cleaning services include, but are not limited to, removal and replacement of fuel, tank cleaning, filter replacement, and fuel line purging. No more than 10% of the total tank storage amount may be permanently removed unless prior approval by ODOT Contract Administrator has been received. Contractor shall provide all necessary equipment and materials needed to conduct the cleaning. Type of Cleaning - Contractor shall consult with and obtain approval from ODOT Contract Administrator regarding level of cleaning required, based upon the test results and visual inspection. High level cleaning requires a vacuum truck to remove highly contaminated fuel, tank truck and additional cleaning equipment. If confined space entry is needed, Contractor shall consult with and obtain approval from ODOT Contract Administrator. Pricing assumes an average of 1000 gallons processed per hour.