Information from site visit.docx

This is a site visit information document providing clarification on the scope of work for fume hood repair and exhaust system replacement at the National Science Laboratory-Blakely, a USDA reference laboratory for aflatoxin testing in nuts and nut products. The document clarifies a discrepancy identified during the May 20 site visit hosted by Mike Miller, the Contracting Officer's representative, regarding the number of exhaust systems requiring replacement.

The key clarification is that while the laboratory contains 11 traditional fume hoods with sashes and monitors, there are 12 exhaust fan and stack assemblies requiring replacement. The 12th assembly serves an over-the-counter hood similar to a kitchen stove hood, which lacks a traditional sash and monitor but requires replacement of its external motor along with all other assemblies. Consequently, contractors must plan for replacement of 12 blower/stack assemblies rather than 11. This information is critical for accurate scoping and pricing of the repair work, which includes disconnecting existing electrical connections, removing and installing new exhaust fans and zero pressure caps, installing PVC flex connectors and exhaust stacks with guy wires, completing new electrical connections, replacing fume hood alarms, conducting OSHA-required testing, calibrating alarms, and replacing fume hood lights.