Industrial WW Discharge Permit Renewal - Messer, LLC

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Messer, LLC. Industrial Wastewater Discharge Permit page 7 of 41 Facility Description Messer, LLC. processes crude carbon dioxide from a neighboring industry to produce food quality carbon dioxide. The carbon dioxide comes from a feed gas line from the neighboring industry. The carbon dioxide is filtered and sent to a separator that helps remove the moisture. Then the carbon dioxide is chilled with ammonia and then sent to another separator that removes large water droplets in solution. The carbon dioxide is then compressed from 2 pounds per square inch to 60 pounds per square inch. The solution is then cooled with cooling water. A third separator removes moisture in the carbon dioxide and then is compressed to 300 pounds per square inch. The carbon dioxide then travels through a zinc oxide bed to remove the hydrogen sulfide that may be present. The carbon dioxide is cooled through the water cooler and is sent back through the scrubber. The scrubber removes the impurities in the carbon dioxide. The carbon dioxide is now at 320 pounds per square inch coming from the scrubber. PART I – EFFLUENT LIMITATION A. Sample Port and Collection Location 1. Sample Site Outfall #900 is located outside at the southwest corner of the facility inside the facilities fence in a controlled manhole. The sampler is set up next to the manhole and is locked up. A 24 hour composite sample is collected in this manhole of Messer's total discharge flow. Grab Samples are also collected in this manhole . 2. Any discharge of water or waste having a pH lower than 6.0 S.U. or a pH higher than 11.0 S.U. is prohibited. In addition, the permittee’s wastewater discharge shall not exceed the following effluent limitations: Effluent limitations for Sample Site Outfall # 900: Parameter Daily Maximum Limit (mg/L) Monthly Average Limit (mg/L) Arsenic (mg/L) Report* Report* Cadmium (mg/L) Report* Report* Chromium (mg/L) Report* Report* Copper (mg/L) 3.0 0.6 Lead (mg/L) 1.5 1.0 Mercury (mg/L) 0.00019 -na- Nickel (mg/l) Report* Report* Oil and grease (mg/l) 300 -na- Oil and Grease TPH (mg/l) 100 -na- Silver (mg/L) Report* Report* Zinc (mg/L) 2.5 1.5