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Water Quality Measurements Field Standard Operating Procedure <br /> SWE-FSOP-101;Revision 1 Ahtna Southwest Environmental Operations <br /> be taken by simply immersing the probe(s) in the water body or container.The probe used is the same or <br /> similar to that used during low-flow sampling; therefore, calibration and probe handling procedures <br /> described in Section 4.1 should be followed, as well as the manufacturer's manual for instrument-specific <br /> instructions. Note: When performing open-probe measurements, the flow-through protective covering <br /> should be in place to protect the probe surface from potential impacts, contact with sediments, etc. <br /> Refer to FSOP-404.00 Open Water Sampling and appropriate health and safety procedures when <br /> performing measurements and sampling in open bodies of water. <br /> 5.0 Quality Assurance/Quality Control <br /> Conduct the 3-Phases of Quality Control Method described in the project work plans. <br /> Quality Assurance (QA) and Quality Control (QC) procedures for water quality parameters and field <br /> documentation review will be performed by the FTL or PL to check that procedures and documentation <br /> content and level of detail comply with this SOP. If a deficiency or a variance was taken to the SOP,the PL <br /> should document the deficiency/variance and determine the need for corrective action in coordination <br /> with the QA Manager. <br /> 6.0 Documentation Review <br /> The FTL is responsible for daily review of the activities performed at the site and fieldwork documentation <br /> for compliance with requirements (Section 4.0) and legibility. Errors and omissions should be explained <br /> and revisions to an entry signed and dated by the FTL. <br /> 7.0 References <br /> YSI Pro Plus Manual: <br /> https://www.ysi.com/File%20Library/Documents/Manuals/605596-YSI-ProPIus-User-Manual-RevD.pdf <br /> Horiba U-50 Manual: <br /> https://static.horiba.com/fileadmin/Horiba/Products/Process and Environmental/Water Pollution/Inst <br /> ruction Manuals/U-50/U-50 Manual.pdf <br /> Page 8 of 8 <br />