The commissioner may issue commitments for, and may make or contract to make, grants pursuant to section 21 of this amendatory and supplementary act, upon his approval of any application submitted to him therefor and the finding that:
a. The proposed plan for the solid waste collection, disposal or utilization project is consistent with the adopted and approved solid waste management plan of the solid waste management district within which the project is to be undertaken and is in conformity with the objectives, criteria and standards contained in the Statewide solid waste management plan;b. The estimated funds available to the applicant for the experimental project, including loans and grants from any department or agency of the United States, local grants-in-aid, and the proposed State grant, will be sufficient to meet all the probable costs of the experimental project and assure its completion; andc. There is no legal impediment or bar to the implementation and completion of the experimental project.