Specifications include, but are not limited to: The purpose of this bid, and the requirement contract awarded following an evaluation of the bids received, is to provide wholesale natural gas for use at the Easterly, Southerly and Westerly Wastewater Treatment Plants (WWTPs), the George J. McMonagle Administration Building (GJM), the Environmental Maintenance and Services Center (EMSC), and five (5) outlying facilities owned and operated by the Northeast Ohio Regional Sewer District (District). The Southerly and Westerly WWTPs require year-round quantities of natural gas for two (2) purposes: fuel to operate the sludge/biosolids incinerators, and heating during the winter months (approximately October through May). The Easterly WWTP, GJM, EMSC and five (5) outlying facilities require natural gas solely for heating purposes. During the contract period, the District shall have the unilateral right to add or delete any combination of accounts amounting to not more than 10% more or less of the last 12 months’ aggregate annual consumption as provided in the bid, and it is important that all new locations are to receive the contract price, as all the other locations mentioned at the beginning of the contract.