Received a call from Inspector 308 (Eric) parking lot was flooded with polluants observed going into drop inlets. Contractor had protected some inlets with filter fabric which is not an acceptable form of protection. Informed Eric to write a correction notice and to summarize what is needed and to give them 24-Hour to comply or a stop work order will be presented. Informed primary RP (George S) that all drop inlets will need to be protected with industry acceptable controls or measures and that the on-site inspector will be meeting with him this morning and presenting this correction notice to him. Will follow up.