Stormwater infiltration requirements seem counterintuitive for sure. If it's an existing industrial facility that's a generator of industrial waste and the site is contaminated, the generator of the industrial waste is responsible for cleanup. The exception is if the facility didn't generate the waste after the implementation of RCRA. Often these sorts of sites are considered "brownfield" sites, i.e., there is no regulatory setting that could force cleanup, but redevelopment needs to consider the fact that contamination exists. Often when you go through "voluntary remediation" or "brownfield" cleanups, there is some regulatory involvement. The regulators often impose "institutional" controls to limit problems with further contamination to "human health or the environment." These controls can include deed restrictions on the use of wells or excavations greater than ___ ft deep (i.e., in order to preserve some existing impervious cap).
When issuing design packages to bidding contractors you have to properly disclose the nature of the contamination where present in the area of construction. Typically, that relates more to excavation areas then fill areas. Sometimes your opportunities to go cut-to-fill are limited. Sometimes these limitations have to do with the end use, i.e., are you developing a hospital, day care, residential community, etc.
No way to properly address all these variables.
Much of this can be determined using common sense and an open line of communication with the regulators. I'd mostly be interested in the regulatory setting of the property though. . .
f-d
¡papá gordo ain’t no madre flaca!