GROUND WATER PROTECTION
STATE OF INDIANA DRAFT GENERIC
PESTICIDE MANAGEMENT PLAN
Appendix B of the Plan, Table 3 - 6
Table 3. Characteristics of capping-unit thickness ranges
Range (ft) |
Characteristics |
0-25 |
The majority of the capping unit(s) is less than 25 feet thick and contains sparse to numerous discontinuities where no fine-grained material is present |
< 25 |
The majority of the capping unit (s) is less than 25 feet thick and is likely to be relatively persistent over the mapped range |
25-50 |
The majority of the capping unit is 25 and 50 feet thick |
25-50+ |
The majority of the capping unit is between 25 and 50 feet thick but small to medium sized areas of greater thickness are locally abundant |
0-50 |
The majority of the capping unit ranges widely and abrupty between 0 and 50 feet and cannot be resolved at a lesser contour interval at the present map scale; sparse to numerous discontinuities appear to be present |
0-50+ |
Capping unit thickness is so variable that it cannot be resolved at the present map scale |
> 50 |
The majority of the capping unit is greater than 50 feet thick |
Return to:
Table 4. Characteristics of unconfined sand and gravel thickness ranges
Range (ft) |
Characteristics |
0-25 |
The majority of the sand and gravel is less than 25 feet thick and may be thin or absent over some areas within this range |
25-50 |
The majority of the sand and gravel is between 25 and 50 feet thick |
25-50+ |
The majority of the sand and gravel is between 25 and 50 feet thick but small to medium sized areas of greater thickness are locally abundant |
0-50 |
The majority of the sand and gravel ranges widely between 0 and 50 feet, and cannot be resolved at a lesser contour interval at the present map scale; some discontinuities are likely to be present |
0-50+ |
Sand and gravel thickness is so variable that it cannot be resolved at the present map scale |
> 50 |
The majority of the sand and gravel is greater than 50 feet thick |
Return to:
Table 5. Water table depth ranges and their meanings.
Depth (ft) |
Characteristics |
<5 |
Generally very low-lying, poorly drained landscapes, commonly characterized by abundant wetlands or lakes; the water table is commonly less than 5 feet deep over a majority of the setting. |
5-15 |
Majority of map unit is likely to be in this range; significant deviations are probable in some places. |
15-30 |
Majority of map unit is likely to be in this range; significant deviations are probable in some places. |
30-50 |
Majority of map unit is likely to be in this range; significant deviations am probable in some places. |
>50 |
Water table is likely to be greater than 50 feet deep in most places; lesser depths occur locally, whereas depths of 100-150 feet are possible in some settings. |
Return to:
Table 6. Depth ranges and composition of bedrock surface.
Depth (ft) |
Characteristics |
0-25 |
Bedrock is less than 25 feet deep below most of unit; bedrock outcrops may be numemus in some of these areas, whereas greater depths are also present locally |
25-50 |
Most of unit lies in this range; both greater and lesser depths are also present locally, mainly over small areas. |
>50 |
Bedrock is greater than 50 feet deep below nearly all of these areas; somewhat lesser depths are indicated in isolated data points in some settings |
Bedrock composition is indicated by the presence
and type of symbol that follows the depth range in a particular map
unit:
no symbol: mainly limeone and dolomite
s: mainly shale and/or siltstone
x: complexly interbedded shale, siltstone, and sandstone
with or without zones of limestone and coal
Return to:
email: hahnl@hahn.isco.purdue.edu