(a) Any existing uses legally storing, handling, using and/or producing regulated substances in amounts equal to or less than the requirements under Section 1179.04 are considered conforming uses and this section does not apply. Any new use or change of use shall maintain the conforming status of the property.
Existing nonconforming uses shall be permitted to maintain the reported maximum quantity for each reportable regulated substance, as determined by peak business cycle. Existing uses and maximum quantities, in combination with a hazard potential rating shall run with the land and be administered in conformance with all other applicable nonconforming provisions of this Zoning Code.
In order to assess the risk for potential groundwater contamination, a hazard ranking has been developed for various activities categorized by their Standard Industrial Classification (SIC) Code. This ranking is based on the kind of materials commonly associated with each use looking only at the most critical hydrologic factors.
Table l lists the site hazard potential by land use activity on a scale of one (l) to nine (9), with one (l) being a low hazard and nine (9) a very high hazard. This rating is based on the intrinsic hazards posed by different land uses and is related to the materials commonly discharged.
Table 2 lists the hazard potential determined on the basis of material known to be used, stored, or disposed of at a specific site.
If the two tables referenced above indicate different site hazard potential ratings for the SIC-coded land use activity and the materials found on-site, the higher of the two scores is the rating for the site. (Ord. 1069-94. Passed 4-28-94.)