WORK PLANS - Laserfiche WebLink

Home Browse Search

CIMM CDIM Standard Operating Procedure 2.1 Subsurface Soil Sampling '"°'"""'"° Rev.1 10/23/2020 • Any additional groundwater sampling requirements or procedures beyond those covered in this SOP, as necessary. There are many different methods that may be used for subsurface soil sample collection during drilling. This SOP focuses on the most common methods: augering, split-spoon sampling, shelby tube sampling, direct-push/continuous core sampling, test pit/trench excavation sampling, and VOC sampling by TerraCore or EnCore sampling. If other subsurface soil sampling methods are deemed necessary to meet project objectives, the procedures for these methods will be updated in this SOP or included in the project work plans. The following subsections outline procedures for subsurface soil sampling. 3.1 Responsibilities The project manager is responsible for ensuring that all sample collection activities are conducted in accordance with this SOP and any other relevant procedures included in project work plans and/or quality assurance project plans (QAPP). The project manager is therefore also responsible for ensuring that the staff working on the project is properly trained in this SOP and other relevant procedures to ensure quality assurance/quality control (QA/QC). The project manager may also choose to take on the role and responsibilities of the project QA manager(see below), when appropriate. A project QA manager, designated by the project manager is responsible for periodic review of field generated documentation associated with this SOP. The QA manager is also responsible for implementing corrective actions (i.e., retraining personnel, additional review of work plans and SOPs, variances to QC sampling requirements, issuing field variances, etc.) to address deficiencies before problems may occur. The project manager will designate a field coordinator who is responsible for all field activities, including preparations and demobilization. The field coordinator oversees all field personnel to ensure that sampling is being conducted in accordance with the relevant SOPs and project plans. Field personnel assigned to conduct surface and shallow subsurface soil/sediment sampling activities are responsible for completing their tasks according to specifications outlined in this SOP, the project work plan, and other appropriate procedures. All staff are responsible for reporting deviations from procedures to the field coordinator. 3.2 Sampling/Drilling Equipment The split-spoon and continuous core sample methods can be paired with a variety of drilling technologies. The specific drilling technology will vary by location and will be influenced by site attributes such as soil type and sample depth. Samples collected from depths of around 1 to 6 feet bgs are typically collected using a hand auger. There are four primary drilling methods used to collect soil data from depths typically greater than around 6 feet: direct push, hollow stem auger, rotary, and sonic drilling methods. This SOP discusses split spoon and continuous core sampling which are conducted when using hollow stem auger and direct push drilling methods, respectively. 3.3 Hand Auger Methodology Hand augered samples are typically collected into glass sample jars. The drill bit end of the auger is positioned at the desired sample location, and the T-shaped handle is turned while 3