Document p1XdmapN3n07KDMxe8L9KZ9k

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 5 77 WEST JACKSON BOULEVARD CHICAGO, ILLINOIS 60604 DATE: SUBJECT: FROM: THRU: TO: September 29, 2021 CLEAN AIR ACT INSPECTION REPORT Gulfstream Aerospace Corporation, 6365 Discovery Dr, Appleton, WI 54914 Karina Kuc AECAB (IL/IN) Nathan Frank, Section Chief AECAB (IL/IN) File BASIC INFORMATION Facility Name: Gulfstream Aerospace Corporation (Gulfstream) Facility Location: 6365 Discovery Dr, Appleton, WI 54914 Date of Inspection: August 27, 2021 EPA Inspector(s): 1. Karina Kuc, Environmental Engineer 2. Daniel Heins, Environmental Scientist Other Attendees: 1. Gena Process, Environmental Compliance Program Specialist, Senior, Gulfstream Contact Email Address: gena.process@gulfstream.com Purpose of Inspection: To determine compliance with the Clean Air Act (CAA) Facility Type: Complete, refurbish and service airplanes Arrival Time: 9:00 AM Departure Time: 10:20 PM Inspection Type: Unannounced Inspection Announced Inspection OPENING CONFERENCE Presented Credentials Stated authority and purpose of inspection Provided Small Business Resource Information Sheet Small Business Resource Information Sheet not provided. Reason: not a small business Provided CBI warning to facility The following information was obtained verbally from Gulfstream representatives. Process Description: The company completes, refurbishes and services airplanes. Airplanes for completion fly in with a fully painted exterior but empty interior. Gulfstream no longer paints plane exteriors at the Appleton location. Airplanes for refurbishing require existing interior to be torn out and replaced. Service work includes engine work, changing tires, changing oil, etc. The facility builds airplane furniture. They have various booths with various levels of particulate matter (PM) filters: six glue booths with 1 or 2-stage filters, four small parts booths with 3-stage filters, one finish booth with a 2-stage filter and a second finish booth being built with a 3-stage filter. A computer numerical control (CNC) machine used in furniture making, is controlled by a dust collector. Sanding can take place outside of a booth, in which case a tent is set up and vented to a 3-stage filter. Staff Interview: Gulfstream removed their paint booth for painting plane exteriors in July 2019. Booths are inspected daily before use. No pressure drop readings are monitored or recorded. Visual indications or bad flow prompt a filter replacement. Pressure drop readings are monitored and recorded for the CNC machine dust collector. The products used have volatile organic compounds (VOC) content limits. Throughput of products is calculated assuming 100% consumption at time of purchase with the exception of P13 finish shop which has a dump chart to track product disposal. Ms. Process stated that relevant workers are trained per 40 CFR Part 63 Subpart HHHHHH for Paint Stripping and Miscellaneous Surface Coating. TOUR INFORMATION EPA Tour of the Facility: Yes Data Collected and Observations: EPA toured the facility and observed a glue booth, finish booth, paint booth, the CNC machine dust collector, and a degreaser. The degreaser uses a non-halogenated solvent. Photos and/or Videos: were not taken during the inspection. Field Measurements: were not taken during this inspection. 2 of 3 CLOSING CONFERENCE Provided U.S. EPA point of contact to the facility Requested documents: Most recent permit and subsequent revisions Emissions tracking spreadsheet and associated annual emissions report to Wisconsin Department of Natural Resources for 2020 Performance tests Safety Data Sheets for most commonly used: primer, catalyst, glue Filter changeout records for most used booth for last 3 years SIGNATURES Digitally signed by Kuc, Karina Kuc, Karina Date: 2021.09.29 X 14:42:10 -05'00' Karina Kuc Report Author NATHAN X FRANK Nathan Frank Section Chief Digitally signed by NATHAN FRANK Date: 2021.10.01 14:48:22 -05'00' 3 of 3