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• Excavator and operator <br /> • Measuring tape or stick <br /> 3.0 Procedure <br /> During collection of a soil sample with an excavator,the following procedures should be used: <br /> I. Prior to beginning any subsurface work,a utility locate must be completed. Any utility lines on the property <br /> must be clearly marked. Information must be obtained from the local underground utility locating center, <br /> as well as from the property owner or tenant, assuming someone who is knowledgeable is available for <br /> consultation. <br /> 2. Pinyon's health and safety plan should be reviewed with any staff and contractors on the job site prior to <br /> sampling activities. Proper and appropriate safety equipment should be worn depending on the job site. <br /> 3. -If not included in the health and safety plan - Pinyon staff should establish hand signals with the excavator <br /> operator. All on-Site personnel should be aware of the hand signals (for instance: operator should show <br /> that they have hands off the controls when on-site personnel are within swing radius of the <br /> backhoe). Other safety precautions should be established when working around the excavator (e.g. if you <br /> are approaching motion to operator,they will let you know that they see you and it is safe to approach by <br /> showing you their hands are off the control). <br /> 4. Upon arrival at site,fill out the logbook according to the Field Notebooks. <br /> 5. Prior to sampling, decontaminate all sampling tools and equipment and reusable equipment. <br /> 6. Establish your sampling locations either in the field or prior to the site visit. <br /> 7. Direct the excavator operator to the location and depth of the sample location. Direct the operator to <br /> dig a test pit. Once the operator has reached the desired depth: <br /> • Using the tape measure or measuring stick,verify the depth <br /> • Identify which sidewall is most appropriate for sampling. Selection should be made by <br /> establishing from which sidewall provides the best representation of soil conditions — for <br /> example, in rocky or cobbly soil, if one sidewall is near vertical and does not contain large <br /> cobbles or bounders, that sidewall should be selected. <br /> • Using the measuring device, establish based on visual representation, soil horizons and <br /> anticipated sampling depths,assuming the sampling depths are pre-determined. If the sampling <br /> depths are not pre-determined,select sampling depths based on observed conditions including <br /> but not limited to soil type, color, moisture content, odors, or other indications of impact. <br /> Note these conditions and observations either on the boring log or soil sampling form. <br /> • Using a decontaminated hand trowel or spoon, scrape away the first few inches of sidewall <br /> material as to expose soil that was not in direct contact with the excavator bucket. <br /> Soil Sampling with Excavator or Backhoe <br /> December 23, 2022 <br /> Page 2 of 3 <br />