ESBD_453817_1757955279951_Specifications.pdf

Attachment A is a specification document for pressurized certified gases used in a mobile air monitoring program. The document details eight specific gas blend specifications for data validation procedures, including BTEX Blend 100 PPB (featuring 1,3-Butadiene, Benzene, Ethyl Benzene, M-Xylene, O-Xylene, P-Xylene, Styrene, and Toluene), BTEX Blend 10 PPM, Sulfur Dioxide at 100 PPB and 10 PPM, Hydrogen Sulfide at 100 PPB and 10 PPM, Ultra-Pure Zero Air, and Carbon Dioxide Bone Dry. Each gas specification includes concentration levels, balance gas (primarily Nitrogen), cylinder size (typically 150A or equivalent), and specific CGA (Compressed Gas Association) standard references.

The specifications are highly technical and appear to be part of a standardized procurement process for calibration and testing gases used in environmental monitoring. Each gas blend is precisely formulated with specific parts per billion (PPB) or parts per million (PPM) concentrations of various chemical compounds. The document emphasizes certified standards, with each gas blend requiring specific CGA specifications and standardized sizing. The Ultra-Pure Zero Air and Carbon Dioxide Bone Dry gases suggest these are for specialized scientific or industrial air quality measurement applications, likely for environmental, research, or regulatory compliance purposes.