AppGKSAAP1206.pdf

CHANGE REQUEST FORM

For 1200 Area Pilot Study for Contaminated Groundwater Kansas Army

Contract/Project: Kansas City District of the Army Corps of Engineers (USACE) W912DQ-11-D- 3004, Task Order No. 022

Date: 10/6/2017

Requested by: CDM Smith

Description of requested changes:

Reason for changes:

Expected results or impact:

Submit this form to the project manager immediately.

Required before implementation of major changes:

Approved by: CDM Smith PM Date:

Acknowledged by: USACE PM Date:

cc: Contract QA Coordinator

Change concrete core diameter from 6 inches to 3 inches.

Because of the abnormally dense concrete slab in Building 1206, the 6-inch concrete core bit was unable to cut the slab. The coring vendor also had a 3-inch core bit, and was able to use it to core the slab. At locations where concrete leaching tests were to be considered, two cores were drilled to provide adequate sample material.

Use of the smaller diameter core bit allowed for successful coring of the slab, which was not able to be completed using the originally-planned bit.

Nathan Smith

10/6/17