NOVELTY - A waste storage system consists of bunker (I) of waste constituents of type (I) separated from municipal solid waste stream, and bunker (II) of waste constituents of type (II). The waste constituents of type (I) are differentiated from that of type (II) based on the chemical composition of the waste constituents and based on how a blended feedstock comprising a combination of waste constituents from bunkers (202) affects hydrogen to carbon-monoxide gas production ratio, and/or total quantity of hydrogen and carbon monoxide produced by gasification.    USE - System is used for integrated storage of waste constituents including high-density polyethylene, low-density polyethylene, polyethylene terephthalate, fibers, paper, newsprint, wood, fats-and-oils, and grease, for use in production of engineered feedstock of desired chemical composition for e.g. gasification (all claimed) for conversion into energy, fuel or petrochemicals.    ADVANTAGE - The system enables economical disposal of domestic waste by recovering the energy and matter bound within it and reducing the need for fossil fuels. The system provides an improved feedstock for the control of output from processes for the production of energy and/or production of raw materials for petrochemical production.    DETAILED DESCRIPTION - A waste storage system consists of bunker (I) of waste constituents of type (I) separated from a mixed municipal solid waste stream, and bunker (II) of waste constituents of type (II) separated from the mixed municipal solid waste stream. The waste constituents of type (I) are differentiated from that of type (II) based on the chemical composition of the waste constituents and based on how a blended feedstock comprising a combination of waste constituents from bunkers affects hydrogen to carbon-monoxide gas production ratio, and/or total quantity of hydrogen and carbon monoxide produced by gasification when the feedstock is converted in the gasification process. INDEPENDENT CLAIMS are included for the following:    (1) method for integrated waste storage; and    (2) method of producing engineered feedstock of desired chemical composition.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of the sorting and separation process of waste as feedstock for gasification.    Bunkers (202)    Moisture sensor (206)    Control unit (208)    Vessel for mixing and drying (210)    Gasifier (222)