Appendix A. Standard Measurements for Comparison of Remedial Alternatives

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Plume Characterization	Typical Units
Length	feet
Width	feet
Depth (thickness)	feet
Areal extent	acres
Volume	acre-feet
Plume leading edge advance- ment 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 contami- nant 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 con- taminant mass transport	pounds/year
Remedial Efficiency
Contaminant mass naturally degraded	pounds/year

Historical Note

New Appendix made by exempt rulemaking at 8 A.A.R.

1491, effective March 4, 2002 (Supp. 02-1).

                    
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