Observations/Finding

As requested, the site was visited by our AS Engineering and Consulting (ASEC) representative for the purpose of providing quality control inspection and testing services.  Visual observation techniques were employed to verify compliance with project drawing/specifications, applicable codes, and materials submittals. The following observations were observed on site this day.

On the above date our representative was on site to observe the pipe contractor continue backfilling the 8″ ductile iron sanitary sewer line and laterals between manholes #B12 thru B14. The backfill materials consisted of a small size blast rock with soil mixture. The materials are very dry and were being placed in two-foot lifts and compacted using two vibratory sheep-foot rollers. It was recommended to the contractor to blade the fill materials down to one foot.  The backfill was reobserved by probing using a rounded end steel rod and was approved for suitable compaction efforts at elevation plus three feet to four feet over top of pipe.

We appreciate the opportunity to be of service to you on this project. If you have any questions regarding this report, please feel free to contact us. We will be more than happy to discuss it with you.

Rock backfill at sanitary sewer line between B12 and B14

Compacting in place fill

Placement lift recommended to blade down to one foot

showing two feet lift prior to blading down

Showing two feet lift prior to blading down