REMEDIAL ACTION WORK PLAN OPERABLE UNIT 2, LANDFILL ...

’ ‘-.> each of the LFG vents. Since chairdink does not prevent human exposure to LFG or protect the
-.,,
vents themselves, the enclosures are not necessary and will not be constructed.
2.9.2 Computer Grade Monitoring
The landfill closure at the landfills involves excavating, grading, and compacting approximately
one million cubic yards of soil and refuse. The excavation and grading activities will be closely
monitored and revised in a timely manner by using a computer program to balance the
earthworks and quickly adjust the final grade to suit the actual quantities of soil and refuse
moved. An earthworks program, AGT..K Earthwork Engineering Sysiems, seems appropriate for
this project.
The program calculates cut and fill volumes using the average-end-area method. Data entry is
accomplished by either digitizing or importing topographic data of the final and existing
elevations. Some features of the program are as follows:
● Basic sitework program will allow data entry by layers for the general fill,
foundation layer and vegetative cover.
● Landfill areas can be balanced by adjusting the final grade in the field by the site
engineer.
● Plan and profile add-on package produces a color cross-section for a quick
understanding and explanation of grading operations.
● Material take-off package gives a print out of final quantities and a color coded
plan view.
● Construction topographic package allows a download capability to survey data.
The program produces the following reports which could be used for progress reports,
subcontractor monitoring, and adjustments to final grade:
● Volume and balance report
● Cross-sections
● Color-shaded site plans showing cut and fill as different color
● Three-dimensional views
● Items report, sorted by item
● Materials report, sorted by materials.
SJ/6-24-96/SACTERC fITORD 0U2MWP.RV1
2-35
. .