NOVELTY - Process (P1) for decontamination of well site waste fluid, involves evaluating a waste fluid to determine if the waste fluid comprises fracturing fluid requiring treatment for sodium, hydrocarbon level requiring hydrocarbon treatment, or drilling fluid requiring clay treatment, mixing mature compost, organic fertilizer, and top soil with the waste fluid, mixing calcium nitrate, organic fertilizer, and gypsum to break up and reduce adhesive characteristics of clay particles present in the waste fluid, stirring, and drying the mixture to produce fertile top soil.    USE - The process (P1) is useful for decontamination of well site waste fluid. The process (P2) is useful for bioremediation of a surface water oil spill (all claimed).    ADVANTAGE - The process is capable of treating variety of oil and gas related waste fluids to convert such waste fluids into fertile top soil.    DETAILED DESCRIPTION - Process (P1) for decontamination of well site waste fluid, involves (a) (i) evaluating a waste fluid to determine if the waste fluid comprises fracturing fluid requiring treatment for sodium, (ii) evaluating the waste fluid to determine if the waste fluid comprises a hydrocarbon level requiring hydrocarbon treatment, (iii) evaluating the waste fluid to determine if the waste fluid comprises drilling fluid requiring clay treatment, (iv) mixing mature 30-150 vol.% compost, 5-20 vol.% organic fertilizer, and 5-20 vol.% top soil with the waste fluid to form a mixture containing waste fluid, where each volume percent is based on the volume of the waste fluid present in the mixture, and if the waste fluid comprises fracturing fluid requiring treatment for sodium, (v) mixing calcium nitrate with the waste fluid in an amount sufficient to balance the sodium content, if the waste fluid comprises a hydrocarbon level requiring hydrocarbon treatment, (vi) mixing an additional 5-100 vol.% organic fertilizer with the waste fluid, where the volume percent based on the volume of waste fluid, and mixing hydrocarbon-digesting microbes with the waste fluid in an amount sufficient to inoculate the waste fluid, and if the waste fluid comprises drilling fluid requiring clay treatment, (vii) mixing the waste fluid with 5-15 vol.% gypsum, based on the volume of waste fluid, to break up and reduce adhesive characteristics of clay particles present in the waste fluid, (viii) stirring the mixture for a period of time effective to form a substantially homogenous mixture, and (ix) drying the substantially homogenous mixture to produce fertile top soil, or (b) (i) positioning near a well site, an apparatus including hopper, where the hopper having at least one compartment with a mixing assembly, and at least one air supply conduit for supplying air into the at least one compartment, (ii) evaluating a waste fluid to determine if the waste fluid comprises fracturing fluid requiring treatment for sodium, (iii) evaluating the waste fluid to determine if the waste fluid comprises a hydrocarbon level requiring hydrocarbon treatment, (iv) evaluating the waste fluid to determine if the waste fluid comprises drilling fluid requiring clay treatment, (v) mixing the waste fluid with mature compost, organic fertilizer, and top soil in the at least one compartment of the hopper to form a mixture having a pH of 7-9.5, where each volume percent is based on the volume of the waste fluid present in the mixture, and if the waste fluid comprises fracturing fluid requiring treatment for sodium, (vi) mixing calcium nitrate with the waste fluid in an amount sufficient to balance the sodium content, where if the waste fluid comprises a hydrocarbon level requiring hydrocarbon treatment, (vii) mixing an additional 5-100 vol.% organic fertilizer with the waste fluid, where the volume percent based on the volume of waste fluid, and mixing hydrocarbon-digesting microbes with the waste fluid in an amount sufficient to inoculate the waste fluid, where if the waste fluid comprises drilling fluid requiring clay treatment, (viii) mixing 5-15 vol.% gypsum with the waste fluid, where the volume percent is based on the volume of waste fluid, to break up and reduce adhesive characteristics of clay particles present in the waste fluid, (ix) activating the mixing assembly so as to stir the mixture for a period of time effective to form a substantially homogenous mixture, (x) drying the substantially homogenous mixture so as to produce fertile top soil, and (xi) removing the fertile top soil from the at least one compartment of the hopper. INDEPENDENT CLAIMS are included for the following:    (1) process (P2) for bioremediation of a surface water oil spill; and    (2) bioremediation agent comprising organic fertilizer, hydrocarbon-digesting microbes, and at least one of saw dust and wood shavings.