Ariz. Admin. Code § R18-16-416
C. Following an approval under subsection (B), the Department shall not undertake or require additional remedial action under this Article for the site or portion of the site other than the actions stated in the determination under subsection (B). However, the Department may reopen an investigation and take or require additional remedial action for any of the following reasons:
| Plume Characterization | Typical Units |
| Length | feet |
| Width | feet |
| Depth (thickness) | feet |
| Areal extent | acres |
| Volume | acre-feet |
| Plume leading edge advancement rate | feet/year |
| Plume volume expansion rate | acre-feet/year |
| Contaminant and Source Characterization | |
| Probable contributing sources | (number) |
| Number of contaminants | (number) |
| Maximum concentration of each contaminant | µg/l |
| Contaminant concentration vs. MCL | ratio |
| Contaminant mass in plume | pounds |
| Weighted average contaminant concentration in plume | µg/l |
| If present, estimated mass of LNAPL | pounds |
| If present, estimated mass of DNAPL | pounds |
| Sorbed contaminant mass in plume | pounds |
| Rate of downgradient contaminant mass transport | pounds/year |
| Remedial Efficiency | |
| Contaminant mass naturally degraded | pounds/year |
| Contaminant mass removed through remediation | pounds/year |
| Groundwater removed through remediation | acre-feet/year |
| Groundwater added (injected) by remediation | acre-feet/year |
| Net groundwater removed/added | acre-feet/year |
| Groundwater removed per year vs. plume volume expansion per year | percentage |
| Contaminant mass removed per year vs. pre-remedial contaminant mass transported downgradient per year | percentage |
| Time per first log cycle decline in average concentration | years per log cycle decline |
| Cost Efficiency | |
| Contaminant mass removal | $ per pound |
| Groundwater removal | $ per acre-foot |
| Cost per first cycle decline in average concentration | $ per log cycle decline |
New Appendix made by exempt rulemaking at 8 A.A.R. 1491, effective March 4, 2002 (Supp. 02-1).
New Section made by exempt rulemaking at 8 A.A.R. 1491, effective March 4, 2002 (Supp. 02-1).