WA ST Dept of Ecology Biosolids 9/8/2022

4 of 11 h) Pull forward until the driver door is no longer over the water. i) Park the vehicle on the ramp with the trailer mostly in the water, so that it is easier to recover the boat at the end of sampling, and so that the vehicle is out of the way of center dike traffic. j) The team member on the boat drives the boat beside the launch to pick up the team member on shore. c. If the barge is needed for Recirculation Channel sample collection, notify the Maintenance group at least one business day prior to taking biosolids samples from the Recirculation Channel. The Maintenance Group will transport the barge from the AC1 dock to the Recirculation Pump Station. d. Prepare the bio boat for Recirculation sample collection. i. Prepare the bio boat per section E.8.b.ii – vi. ii. Attach chains to the eye hooks on the bio boat. iii. Pull the boat to the IPT corner on the trailer attached to a four-wheel drive vehicle. iv. Detach the boat from the trailer. v. Pick up the bio boat with the forklift. vi. Ensure the boat is close to level. vii. Drive the trailer out from underneath the boat. viii. Carefully lower the bio boat into the Recirculation Channel by booming out or maneuvering closer to the channel. Note: a spotter is required while lowering the bio boat into the Recirculation Channel. The spotter can help guide the boat with a lead attached to the bow. ix. Release the chains from the forklift. x. Park the forklift in a safe location. e. If necessary, prepare the dinghy for Recirculation sample collection. i. Load the dinghy in the bed of a truck. ii. Ensure the boat plug is in place and secure. iii. Launch the dinghy near the Recirculation Pump Station, tying it off to the shore to prevent drifting while loading. iv. Ensure the paddles are onboard the vessel. v. Note: the dinghy has a 325-pound weight capacity including operators and equipment. Although the 9.9 hp motor can be attached to the rear of the vessel, doing so greatly reduces the remaining carrying capacity. Because of the weight constraints and because the biosolids are close to the surface in the northern sections of the Recirculation Channel, and a powerful propeller could alter the characteristics of a sample core, the 9.9 hp motor is not recommended for use during sample collection. f. Notify Day Operator that biosolids sampling is commencing and which operators are on the barge, bio boat, or dinghy. g. Navigate to the sampling area determined in Step D.2. according to the Sample Site maps located in Appendix A for AC-2 or Appendix B for the Oxidation Pond. i. For AC-2 samples: Navigate from AC-1 to AC-2. Cross the cable securing splash aerator 65 on the south side of the aerator. Bring the propellers to a stop and trim up prior to