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Corporate �� ... • � rters 11 , :, „ , :, ,,:Pmvon ft/Environmental,Inc. ka Standard Operating Procedure Title: Soil Sample Collection Number: SCREM05 Revision: 0 Author: Darin Worden Reviewer: Jeremy Musson Acceptance Date: December 22, 2022 File Location: Z:\PEER\SOPS\Project Delivery SOPS\FINAL SOPS\SOP-SCREM\Word Doc uments\SOP-SCREM05 Soil Sample Collection.docx 1 .0 Purpose Soil samples can be recovered using multiple sampling methods. The purpose of soil sampling is to gather data on the nature and extent of constituents present in surficial and subsurface soils at a site. Many of Pinyon's projects include soil sampling and it is essential that the sampling of soils is completed in accordance with the project scope of work (SOW) and Pinyon's standard operating procedures (SOPS). Potential problems with soil sampling include cross contamination of samples; this occurs from improper decontamination techniques and soil handling procedures. Proper soil sample collection procedures are necessary to obtain complete, reliable data. 2.0 Procedure The following procedures will be used for soil sample collection: • Prior to beginning any subsurface work,a utility locate must be completed.Any utility lines on the property must be clearly marked. First, contact the Colorado Utility Locator: www.colorado8l l.org and request that underground utilities be marked. Second, communicate with the landowner or tenant, if possible, to identify private underground utilities and other obstacles that only the landowner or tenant may know about. • Pinyon's health and safety plan should be reviewed with any staff and contractor on the job site prior to sampling activities. Proper safety equipment should be worn depending on site conditions. Proper traffic control, including a traffic control plan and permits, must be completed as necessary. • Prior to the site visit to complete soil sampling, sampling equipment should be decontaminated and free of dirt from previous projects. Decontaminating soil sampling equipment should be completed using a three- bucket wash system with a phosphate free detergent; refer to Pinyon's SOP-SCREM04 for decontamination of reusable equipment. • Pinyon staff should establish hand signals with a machine operator if heavy machinery is being utilized for soil sample collection (backhoe, drill rig, etc.). All on-site personnel should be aware of the hand signals, and safety precautions should be established when working around the backhoe such as, do not approach Soil Sample Collection December 22, 2022 Page I of 6