Exhibit_A_(2).docx

This is Exhibit A, a technical specification document for the City of Pasadena Water & Power Department's chemical water treatment services contract for the Glenarm Power Plant located in Pasadena, California. The exhibit establishes typical control limits for water quality parameters across three distinct cooling systems at the facility. For circulating water systems (GT-3, GT-4, and GT-5), specifications include calcium hardness not to exceed 1,000 ppm, pH ranges between 7.6 and 9.0 depending on the unit, silica content at 150 ppm maximum, conductivity between 2,000 and 4,500 mmhos, halogen residuals of 0.3 to 2 ppm, phosphate levels of 12 to 17 ppm, chloride maximums of 700 ppm, and oxidation-reduction potential (ORP) between 340 and 360 mV for GT-5. The closed cooling water and chiller system parameters specify pH between 8 and 10.2, conductivity not exceeding 5,000 mmhos, iron content at 1 ppm maximum, sodium nitrite levels of 1,000 to 1,200 ppm, and molybdate concentration of 300 to 500 ppm for chillers.

The once-through steam generator (OTSG) feedwater control limits establish significantly more stringent requirements, including pH between 9.2 and 9.8, conductivity below 0.25 S/cm, ammonia at 0.3 ppm maximum, dissolved oxygen below 20 ppb, iron below 10 ppb, silica below 20 ppb, chloride below 6 ppb, hardness below 1 ppb, copper below 2 ppb, and sulfate below 6 ppb. These specifications form the technical baseline for chemical treatment service providers to maintain optimal water quality and operational efficiency across the power plant's water systems.