Interest vendors are asked to please fill out the form titled W911WN26QA057. Please see Attachment 2 - Materials, and Attachment 3 - Drawings for further details regarding specifications. For any ques... Interest vendors are asked to please fill out the form titled W911WN26QA057. Please see Attachment 2 - Materials, and Attachment 3 - Drawings for further details regarding specifications. For any questions, please email the Contract Specialist, Isaiah Johnson, isaiah.m.johnson@usace.army.mil. All questions will be answered in the form of a solicitation amendment.