(t) OLYMPUS CNEROY Sound Impact Assessment Leto Well Pad West Deer, PA Prepared for: Olympus Energy, LLC 501 Technology Dr, Suite t200 Cauonsburg, PA 15317 Prepared by: Acoustical Control LLC 5601 Bridge St Suite 300 Ft Worth TX 761L2 February 6,2020 Sound lmpact Assessment Leto Well pad West Deer, pA Purpose Acoustical Control, (ACLLC) LLC prepared this report to investigate the anticipated sound impact of natural gas drilling and hydraulic fracturing operations on the surrounding environment at the olympus Energy (Olympus) Leto Pad located in West Deer PA. Sound levels from the drilling operations and hydraulic fracturing (completions) operations have been modeled for the Leto location. Ordinance Summarv The West Deer Twp. ordinance as it pertains to oil and gas operations noise calls for noise levels not to exceed ambient sound levels by 5 decibels during drilling activities and 10 decibels during hydraulic fracturing activities at the nearest property boundary of a residence or public building. For the purposes here, we will utilize 70 decibels during drilling and 75 decibels during hydraulic fracturing as the threshold based on the default ambient for west Deer of 65 decibels Site lnformation The Leto pad is located at 40.6332 -79.8879, approximately 800' north of oak Rd and 450, west of Linden St. There are multiple structures within 3,000 feet from the location most of which appear to be residential. The closest residence appears to be 24 hemlock St. approximately 435, to the SW. below shows the Leto location and surrounding area, Leto Sound lmpact Analysis February 2020 Sound lmpact Modeling The sound impact analysis was conducted with the application of three-dimensional computer noise modeling software. All models in this report were developed with Brriel and Kjar PredictorVL'J..2 software using the ISO 9613,2 standard. Noise levels are predicted based on the locations, elevation, noise levels and frequency spectra, the geometry and reflective properties of the local terrain, buildings, and barriers. The sound level data used in the noise models was collected from an H&P Flex Rig for the drilling phase and a ProPetro Frac spread (layout provided by Olympus) for the completions phase. Pre-existing sound sources such as those from road traffic, weather, animals, air traffic and other ambient sounds are not included in the models. Weather conditions such as wind speed, wind direction, temperature and humiditycan influence sound intenslty and direction. Wind can affectthe propagation of sound by several decibels depending on the wind speed, direction and cloud cover. Being conservative and the uncertainty of the season, foliage was also omitted in the models. The sound levels generated in the models are strictly from oil and gas operations; measured sound levels may differ from those in the model. Predictive modeling of C-weighted sound data is not included in the lnternational Standard ISO 9613 (Acoustics - Attenuation of sound during propagation outdoors.) Site Recommendations During the drilling phase sound levels are not expected to exceed 70 dBA at the nearest property boundaries and therefore are not expected to require abatement this phase. During the completions phase sound levels are not expected to exceed 75 dBA at the nearest propefty boundaries and therefore are not expected to require abatement this phase. The services provided for the project was performed with the care and skill ordinarily exercised by reputable members of the profession practicing under similar conditions. No warranty, expressed or implied, is made or intended by rendition of these consulting services or by furnishing oral or written reports of the findings made. This report has been prepared by Acoustical Control, LLC for the exclusive use by Olympus Energy. 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AND WETLANDS Brian Dillemuth Huntley & Huntley Energy Exploration Llc 501 TECHNOLOGYDRSUITE 12OO CANONSBURG PA 15317 Re: General Permit (GP) Acknowledgment Notification Leto Well Pad APS tD# 997380, AUTH tD# 1280299 West Deer Township Allegheny County Dear Huntley & Huntley Energy Exploration Llc, This letter acknowledges receipt of your notification to use and registers your use of above authorized General Permit(s) (GP(s)) under the authority of the Dam Safety and Encroachments Act (32 P.S. $ 693.1 et. seq.) and 25 Pa. Code Chapter 105. You are responsible for assurino the work is done in accordance with the drawinqs. terms and conditions contained in the GP(s). Please direct special attention to all time sensitive issues associated with the GP authorization(s). You may proceed with your prolect after making the required notifications stipulated in the GPG) and securing all other approvals that may be necessary.