final bid specs 09328.pdf - Freese and Nichols, Inc.

3. Areas of the fill being compacted with power hand tampers or vibratory plate hand
compactors shall receive a minimum of eight (8) passes of the equipment with an overlap
of 50% of the equipment base plate width.
4. The in-place density of Class 1 through Class 5 Earth Fill shall not be less than 95% of
maximum dry density as determined by ASTM D-698, Standard Proctor, except compact
the top 12" of fill underneath roadways and parking areas to not less than 100% of
maximum dry density as determined by ASTM D-698, Standard Proctor. In areas cut
underneath roadways and parking areas scarify and re-compact the top 8" of the
subgrade within the specified moisture content, to not less than 100% of maximum dry
density as determined by ASTM D-698, Standard Proctor.
5. Compact cohesionless materials on which are not practical to control the density by
proctor methods to a minimum of 75% relative density as determined by ASTM D-4253
and ASTM D-4254. At the discretion of the Engineer, an alternate method of determining
relative density may be used which has been correlated with methods ASTM D-4253 and
ASTM D-4254.
6. If necessary, to achieve the specified density, increase the number of passes of the
compaction equipment, and/or modify the weight of the compaction equipment.
7. Regardless of the density achieved, the number of passes of the compaction equipment
shall not be less than eight (8).
3.05 FIELD QUALITY CONTROL
The Owner is responsible for the costs involved in providing an approved testing laboratory to
perform quality control testing of backfill operations. The testing laboratory shall make tests of inplace
density in accordance with ASTM Standards. The testing laboratory shall monitor backfill
operation continuously or at intervals acceptable to the Owner and Engineer at structures. It shall
be the responsibility of the Contractor to notify the testing laboratory before backfill operations
begin.
1. Unless noted otherwise, in-place density tests shall be conducted at a rate of one test per
3,000 square feet for every lift.
END OF SECTION
Structural Excavation and Backfill 31 23 10-5
DPR09328