Observations/Finding

As requested, a representative from AS Engineering and Consulting (ASEC) visited the site to perform quality control inspection and testing services. Visual observation techniques were employed to verify compliance with project drawings/specifications, applicable codes, and approved material submittals. The following observations were made during the site visit:

1. Earthwork Activities

Placement and compaction of backfill materials continued in the following areas:

• Sewer trench between MH4.1 and MH4.2.

At the time of arrival, our representative observed active work in progress. Fill material was being placed in 1-foot lifts and compacted using a 9-ton sheepsfoot roller and trench compactors.

2. Compaction Testing

Compaction testing was performed using a Troxler nuclear density gauge in accordance with ASTM D2937. Additionally, general probing was conducted using a 3/8-inch diameter probe rod.

Density test results indicated that many of the compacted materials did not meet the project specification of 95% of the maximum dry density, as determined by Standard Proctor ASTM D698.

Note: Moisture content exceeded the specified range limit and materials required scarification and aeration prior to replacement. The contractor was informed of this issue but did not take corrective action.

We appreciate the opportunity to support your project. If you have any questions regarding this report, please do not hesitate to contact us. We are happy to discuss our findings in greater detail.