B. SOILS
- Sample, test, and report to the City Testing Lab, results of soil proctor curve information including maximum density and optimum moisture and location of each soil curve sample on subdivision site. The City's Soil Data Base may be utilized where curves are available by contacting the City Testing Lab. Soil curves shall be run in conformance to AASHTO T-99, Method A.
- Deliver to the City Testing Lab by the end of construction of each subdivision, a minimum 5lb. representative sample of the material passing the #4 sieve of each soil curve ran, for soil classification testing.
- Obtain compaction and moisture tests of fill, pavement sub-grade, and utility backfill at varying depths below finished grade at the rate of one test for each 300 linear feet of two-lane pavement grade or utility trench with a minimum of one test per day to represent work. Additional testing of smaller areas of construction may be required at the direction of the Engineer.
- Utility trench backfill tests at finished grade should be obtained by having the Contractor turn the backhoe around and dig a sample hole 1' to 2' deep behind where current compaction is being done. For depths between 2' and 4' below finished grade, tests are obtained by having the Contractor peel a spot from the area currently being compacted. Sampling at depths greater than 4' below finished grade should only be done in trenches with the proper width, stepping, and/or shoring based on accepted practices for excavation and trench safety in the various soil types.
- Inform the Engineer and Contractor of test results as soon as possible.
- Record and report compaction/moisture test information including general test location (i.e. street name), Centerline Station and Offset, depth below finished grade, and check test indications for failed tests.
- To perform density cores after the Work is complete, if required by the City.
