Observations/Finding

As requested, our AS Engineering & Consulting LLC representative was on site to observe grading and backfilling operations for the above referenced project. The following were observed this day:

The placement and compaction of backfill soils for the sewer trench between (see attached density report for locations).

At the time of arrival, our representative observed that work was in progress with1-foot lifts being placed and compacted using CP56B and trench compaction equipment. Compaction testing was performed using the Standard Test Method for Density of Soil in Place by Drive-Cylinder (ASTM D 2937), along with
general probing using a 3/8″ diameter probe rod.

Density test results indicate that most of the compacted materials met the project requirement of 95% of the maximum dry density obtained by a Standard Proctor ASTM 698.

One of the locations where drive density sample was taken.