EXHIBIT H ADDENDUM TO SOIL SAMPLING.pdf
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- Attached to
- FIA PLOTS NORTHERN IDAHO
- Solicitation number
- 1240BG23Q0034
- Issued by
-
Department of Agriculture Forest Service
About this file
This addendum provides guidance for additional soil sampling to occur on plots identified for a soil sampling contract opportunity with the Department of Agriculture Forest Service. The successful bidder will be required to collect mineral soil samples from subplots 3 and 4 of all plots tagged for soils, in addition to the standard sampling from subplot 2. Sampling procedures and requirements outlined in the base contract documents apply equally to the additional subplots. Specifically, samples must be collected from the 0-4 inch, 4-8 inch, and 8-12 inch layers of each subplot, for a total potential of 12 soil layers sampled per plot compared to the usual 5 layers. While data will not need to be entered for samples from subplots 3 and 4, special labels marked "SOILS PLUS" should differentiate these from standard samples on subplot 2.
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EXHIBIT H - ADDENDUM TO SOIL COLLECTION PROCEDURES IN THE P2
FIELD PROCEDURES DOCUMENT (APPENDIX F in the 2022 P2 Field Procedures or Section 11 in the 2023 P2 Field Procedures ) – SOILS This document applies to all plots on the list (EXHIBIT F) tagged as “soils”
For this contract, collection of mineral soil samples will also be done on subplots 3 and 4. Figure F-1 on page 429 in the 2022 P2 Field Procedures or Figure 11-1 on page 279 in the 2023 P2 Field Procedures shows the location for all three subplots for soil samples.
The same procedures and rules apply to the added subplots for mineral soil sampling, such as: the sample must be in a Forested condition. Please refer to the entire Appendix F (2022) or Section 11 (2023) for complete instructions.
The soil sample location is Soil Visit #1 for all subplots.
On page 428 of the P2 Field Procedures Document (2022) or page 278 (Section 11.8) in the 2023 version is this paragraph stating the location for the soil sample:
Deeper Soil Sample
When possible, after obtaining the soil sample from the use of the Soil Corer (or Bulk Density Sampler) for the two mineral samples (0”- 4” and 4”- 8”), re-insert the Soil Corer back into the same hole and pound the sampler another 4 to 6 inches for a third layer (8”- 12”). The feasibility of obtaining the deeper sample might be informed by the difficulty level of driving the corer to obtain the upper samples and the characteristics of the 4 to 8-inch layer (e.g., large fraction of coarse fragments). After obtaining the deeper core, repeat the process of separating the upper 4 inches of that core as the 8 to 12-inch sample. Bag and label that sample as a third sample/layer appropriately. Any soil from beyond the 12-inch depth can be returned to the coring hole. This applies to all three subplots.
The full potential of the extended soil sampling procedure is 12 layers (FF, mineral 0-4”, 4-8”, and 8-12” at each of subplots 2, 3, and 4), as compared with the standard procedure of 5 layers (FF on subplots 2, 3, and 4, and mineral 0-4” and 4-8” only on subplot 2).
All other guidance in Appendix F (2022 P2 Field Procedures) or Section 11 (2023 P2 Field Procedures) (e.g., “Alternative Methods for Problem Soils”) apply.
There will be no data to enter into the PDR for the soil samples on subplots 3 and 4.
Snyder, Maryfaith - FS, UT This sentence only for new contracts. Will add “This document applies to all remaining Soils plots on the current contract.”
Labels for Added Mineral Soil Samples
On subplot 2, where mineral soil for the 8” – 12” sample, write “SOILS PLUS” on the top of the label and write in “Mineral 3”.
On subplots 3 and 4, write “SOILS PLUS” on the top of the labels and fill out as appropriate, writing in “Mineral 3” when collected.
File details come from the government source that posted it. Updated .