“Photochemically reactive material” means any liquid organic material with an aggregate of more than twenty percent (20%) of its total volume composed of the chemical compounds classified below or which exceeds any of the following individual percentage composition limitations, referred to the total volume of liquid:
(a) A combination of hydrocarbons, alcohols, aldehydes, ester, ethers or ketones having a olefinic or cyclo-olefinic type of unsaturation: five percent (5%);
(b) A combination of aromatic hydrocarbons with eight (8) or more carbon atoms to the molecule except ethylbenzene eight percent; (8%);
(c) A combination of ethylbenzene, ketones having branched hydrocarbon structures, trichloroethylene or toluene: twenty percent (20%).
Wherever any organic material or any constituent of an organic material may be classified from its chemical structure into more than one (1) of the above groups of organic compounds, it shall be considered as a member of the most reactive chemical group, that is, that group having the least allowable percent of total volume of liquid.
(Ord. No. 857-A-76. Passed 6-27-77, eff. 6-30-77)