Air Purification system for Public Works: Stiles switchgear room at DeH2O to slow down hydrogen sulfide corrosion on new electrical switchgear. https://ebusiness.memphistn.gov/OA_HTML/OA.jsp?page=/oracle/apps/pon/negotiation/inquiry/webui/ponAbstractExternalPG&_ri=396&_ti=1620522760&oapc=2&oas=5oL1FY27h6vWVyYjD5xjzA..