Even though a company doen't technically need a SPCC (at least based on 40 CFR 112), in California, they are being mandated for everyone with oil storage above 660 gallons, and it has to be the full blown one in compliance with Federal requirements for a PE certification. I don't agree with the...
In response to the original question, whether there are benefits in the SWPPP, I can vouch that there are significant benefits that are measurable in water quality samples. I have seen TSS results drop from over 490 mg/l to less than 40 mg/l in a single season with the installation of settling...