Column Name: UNINJ_IIV_TOT_REL

Description: The total amount (in pounds) of the toxic chemical released onsite to Class II-IV Underground Injection Wells during the calendar year (January 1 ? December 31). Class II wells are oil and gas related wells which re-inject produced fluids for disposal, enhanced recovery of oil, or hydrocarbon storage. Class III wells are those wells associated with the solution mining of minerals. Class IV wells are those wells which may inject hazardous or radioactive fluids directly or indirectly into USDW, only if injection is part of an authorized CERCLA/RCRA clean up operation. Class V wells, which include all types of injection wells which do not fall under I-IV, may inject only if they do not endanger USDW, public health or the environment. Class V wells are, generally, shallow drainage wells, such as floor drains connected to dry wells or drain fields. Release amounts may be reported as specific numbers or as ranges. Letter codes are used to represent ranges: A = 1-10 pounds, B = 11-499 pounds, and C = 500-999 pounds. If a facility uses a range code, the amount reported to TRI is the midpoint of the range. Null values will appear as a zero amount.
Envirofacts Table Name(s):

• TRI_FORM_R

• Data Source:
• Data Element:
• ADABAS File:

Properties:

• Type:NUMBER
• Length:21,7

Definition Source:TRI Data Dictionary