Nebraska Administrative Code
Topic - ENVIRONMENT AND ENERGY
Title 118 - GROUND WATER QUALITY STANDARDS AND USE CLASSIFICATION
Attachment B - RECOMMENDED INFORMATION REQUIREMENTS FOR STEP 7 ASSESSMENT
Universal Citation: 118 NE Admin Rules and Regs ch B
Current through December 27, 2022
Note: A Detailed Site Assessment (Step 7) is performed in addition to, and possibly in conjunction with, the Initial Site Assessment (Step 6) if ground water contamination is identified, suspected, or imminent).
I. Aquifer(s)
A. Hydrogeologic framework of principal
(regional) aquifer
1. Thickness
2. Transmissivity
3. Lithology
4. Faults, fractures and other secondary
permeability characteristics (if present)
5. Approximate water-level elevation or depth
to water
6. Overlying (perched)
aquifer and underlying confined aquifer (if present)
7. Geologic formation name(s)
8. Regional flow direction(s)
9. Flow velocity
B. Uppermost aquifer
1. Configuration of the water table
2. Thickness of each stratum
3. Lithology of each stratum
4. Permeability or transmissivity
5. Flow velocity
6. Local sources of recharge and/or discharge
(e.g., losing and gaining streams)
II. Ground Water Contaminant Plume
A. Lateral and vertical
configuration
B. Quantity and/or
concentration of contaminant(s)
C.
Velocity of movement
III. Ground Water Use
A. Identify all water supply
wells within 2,000 feet of the contaminant plume
B. Well inventory data
1. Location (legal description)
2. Use(s)
3. Depth
4. Owner
5. Construction specifications
IV. Background Quality of Ground Water
A. Uppermost aquifer
B. Principal aquifer (if distinct from
uppermost aquifer)
C. Water-quality
parameters
1. Dissolved solids content (or
specific conductance measurement)
2. Nitrate-nitrogen
3. Primary chemical constituents of material
discharged
V. Site Characteristics
A. Climatic
information
B. Topography
C. Accessibility
D. Land Use
E. Existing or abandoned wells or test holes
not identified in III above within 2,000 feet of the contaminant
plume
VI. Reporting Requirements
A. Detailed test hole logs
1. Thickness and lithology of all
strata
2. Measured water
levels
3. Land surface
elevations
4. Other pertinent
information
B.
Map(s)/Cross Section(s)/Table(s)
1.
Large-scale site map showing pertinent features and location of test borings
and inventoried wells and/or test holes.
2. Map and cross section(s) depicting
contaminant plume
3.
Water-table-configuration map
4.
Results of field/laboratory analyses
C. Text describing and analyzing
information
Disclaimer: These regulations may not be the most recent version. Nebraska may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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