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generators). This is to better estimate the percent solids of the entire load being <br /> hauled off for disposal. <br /> b. Methodologies <br /> Samples will be collected by Treatment Plant Operators or by City sub-contractors <br /> using a clean hand auger directly from the disposal bin. Core depths should be <br /> approximately6-12",with precaution beingtaken to avoid tearing of the liner. Multiple <br /> core extractions should be taken at different locations within the disposal bin, placed <br /> into a clean steel bucket, and mixed with a steel sampling trowel to ensure a <br /> representative sample. Mixed cores shall then be placed into clean wide-mouth 8- <br /> ounce glass jars using the sampling trowel. Per analytical laboratory — no sample <br /> preservation is needed. No eating, smoking, or drinking should be performed around <br /> sample collection equipment or open sample containers. Two (2)jars are needed for <br /> one sample. All treatment equipment (Filter Press) and vehicles in the immediate <br /> vicinity should be turned off when performing sample collection. Any left-over filter <br /> cake in the steel bucket shall be returned to the disposal bin. <br /> The following PPEshould be worn when collecting samples: <br /> ■ Clean Rubber Gloves <br /> ■ Protective clothing(overalls,work boots) <br /> ■ N95 dust mask <br /> ■ Safety Glasses <br /> The following sampling equipment should be used, or an equivalent: <br /> ■ Hand Auger <br /> ■ Steel bucket, with lid <br /> ■ Steel trowel, or hand shovel <br /> ■ Glass Sample Jars(provided by analytical laboratory) <br /> c. Frequency <br /> As of the writing of this plan, the LAWTF has been offline for an extended period of <br /> time due to maintenance. An "initial" sample will be collected after the treatment <br /> plant is brought back online and sludge processing resumes normal operation. This <br /> is anticipated to occur sometime in 2026. Samples will then be taken once every five <br /> (5)years to keep information up-to-date and confirm the accuracy of the filter cake <br /> profile. Additional samples will be collected if significant process changes occur. <br />