Fill material shall be dried or moistened as necessary, prior to compacting, to within + three percent of optimum moisture content as determined by ASTM D-1557. Moisture shall be distributed uniformly throughout each lift.
Structural fill shall be mechanically compacted to the following:
Minimum Compaction ASTM D-l557
Foundation Support Slab Support Below Slab Utility Trenches General Site Grading Pavement Support
95% 950/0 90% 90%
Upper 8" of Subgrade All other fill below pave
Aggregate Base Course shall be compacted to a minimum of 95% of maximum density as determined by ASTM D-l557.
Asphaltic concrete shall be compacted to a minimum of 960/0 of maximum Marshall Density (75 Blows).
Compaction by flooding and jetting is specifically prohibited unless authorized in advance by the Owner or his representative and the Geotechnical Engineer.
Observation and Testing
The Geotechnical Engineer or his representative shall perform field density tests with a frequency and at the locations he feels appropriate. The Geotechnical Engineer or his representative will perform Proctor tests on representative samples of all fill materiaL To minimize delays, the Earthwork Contractor is encouraged to submit soil samples prior to use for proctor testing.