Regulations and Compliance
29 CFR 1910.107(b)(3)- If floors in a spray booth or work area are combustible, they "shall be covered with noncombustible material of such character as to facilitate the safe cleaning and removal of residues."
29 CFR 1910.107(g)(2)- OSHA requires spraying areas to be "kept as free from the accumulation of deposits of combustible residues as practical."
29 CFR 1910.22(a)(2)- Floors in your workplace should be, "maintained in a clean and, so far as possible, a dry condition."