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TM 10-3835-231-13
4-4.
ASSEMBLY AND PREPARATION FOR USE. - continued
b.
Plot plan. The following procedure for field plot plan preparation is recommended.
(1)
After the site has been selected, a preliminary plot plan should be made that shows all the major equipment
and system locations, including tanks, pumps, floodlight sets, fire suppression equipment, fuel dispensing areas, tanker
truck receipt areas, and the access roads.
(2)
After the primary cuts and fills have been made so that firm knowledge of the characteristics of the site is
available, and before the earthwork on tank sites, berms, and roadways is started, the preliminary plot plan should be
reviewed, corrected as necessary, to a final plot plan on which equipment locations are firm. Final roadwork, tank pad and
berm construction must be based on this final plot plan.
c.
Site Preparation and earthwork.
(1)
General site preparation. Final site selection and subsequently site preparation and earthwork must be
based on the plot plan. Because the site will probably not be ideal, there must be some give and take between the plot
plan and site preparation results. The following procedures are recommended.
(a)
Cut an access road to the site unless one already exists
(b)
Site preparation work should be based on a grading plan that minimizes cuts and fills operations even
if the plan is roughly prepared in the field. The plan should be based on actual on-site elevations and survey, observation
of obstructions, and knowledge of the types of soils that appear to be present.
(c)
Stake out the area that must be cleared, marking where the major components will be located. Cut,
grub out, doze, or if necessary, blast out major obstructions, i.e., trees, bush, large rocks and boulders, buildings, etc.
(d)
It is only necessary to clear and grade the areas where a. fuel unit will be located, transfer systems
installed, roadways built, and loading and unloading facilities installed. There must be good drainage from the site.
(e)
To the extent possible, cuts and fills should be planned and executed such that the volume of cut soils
roughly equals the required fill for low spots, tank berms, and roadways. Excavation of ground site for the purpose of
forming the required tank berms and roadways can be converted into a reserve water storage bin.
(f)
In preparing the grading plan and executing the cut and fill, the major equipment, most particularly the
5000 bbl tanks, should be set on virgin or cut soils, if possible, rather than on fill.
(g)
If it is required that tanks be located on a filled area, the fill must be compacted as it is placed.
Compacting after a deep fill has little effect.
(h)
When extensive fill is required, the slopes must be such as to prevent slides and minimize erosion.
As a rule, there should be no slopes greater than 2:1 (approximately 25°) in sandy or loamy soils.
(2)
Primary roadways. Primary roadways must be fully compacted, have good drainage, and to the extent
possible, have at least a surface of gravel or crushed rock. Each side of the road should have an adequate ditch to
provide good drainage. Drainage culverts should be placed as required. The road, swale, ditches, and drain culvert
requirements will vary with site conditions and anticipated rainfall. Figure 4-1 shows a desirable road layout for a widely
spread TPT. Figure 4-2 shows a desirable road layout for a close spaced TPT. Roadways must be constructed to permit
ready access to all areas for installation, operation, fuel loading and unloading, and fire fighting.
(3)
Secondary roadways. Secondary roadways within the TPT must be provided to allow movement of material
handling equipment, pumps, fire suppression equipment, and maintenance access. Under-road culverts are to be
installed as necessary. The hoseline suspension kit may also be used to allow vehicles to drive under the hoseline.
Access must be
provided to the pumps and each tank berm.
4-6
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