Atch-01 PWS Attachment 8.8.2. Digital Analyzer Certificate of Instrument Performance.pdf

This document contains Certificates of Instrument Performance issued by Hach Company ServicePlus for K&K Industries (Account Number 40466183) under Contract Number HACH1724846-24 and Work Order WO-01645640. All certificates are dated 5/2/2025 and certified by Sam Tanenbaum, Authorized Service Representative.

The certificates document calibration and performance verification for five instruments: (1) DPD1P1 pHD sc Digital pH Sensor (Serial Number 250304220034) using Hach pH buffers (4, 7, and 10) as chemical standards, returned in Within Tolerance condition; (2) 9020000 Hach LDO sc Model 2 DO Probe (Serial Number 250520032135) using Hach Deionized Water as chemical standard, returned in Within Tolerance condition; (3) LXV525.99EA1551 SC4500 Controller (Serial Number 2420614) with no chemical standards required, returned in Within Tolerance condition; (4) a duplicate SC4500 Controller certificate with identical specifications; and (5) SPMP-CL Single Parameter Monitoring Panel with SC4500 and CL17sc (Serial Number 250300590587) using Hach Total Chlorine Chemkey Reagents as chemical standard, returned in Within Tolerance condition. All instruments received Pre-Servicing Check Out Tests NOT performed. Test equipment used across all certificates includes an Extech Temp/Hum Pen (Model 445580, Serial Z408908, expiring 9-2025) and a Hach Port Parallel Analyzer (Model SL1000, Serial 152950101057, expiring 10-2025). Environmental conditions maintained at 24°C temperature and 88% humidity during testing.