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Page 2 of 4 <br />D. Sampling the Entire Stockpiled Solids Pile Procedure <br />1. Coordinate sampling with Biosolids Manager and Everett Environmental Lab (EEL). <br />a. Sampling should be done as soon as possible after dredging production is complete. <br />b. In advance of sampling, ensure that the EEL has the capacity and equipment to analyze <br />these samples. <br />c. The Biosolids Manager will provide Chain of Custody form. Sample containers and labels <br />will be provided by the lab. <br />2. Gather and clean equipment. <br />a. It is critical that collection equipment is clean and free of any residue that may affect lab <br />results. Sampling tools and buckets dedicated for this process will be stored in the trailer on <br />the biosolids storage pad. <br />3. Delineate sampling area. <br />a. For dredging events resulting in over 1,500 dry tons of biosolids, six equal sampling areas <br />must be delineated within the biosolids stockpile. Use delineators to visually mark the <br />distinct sampling areas. Refer to the attached map for an example. <br />4. Collect samples. <br />a. For representative sampling, collect a minimum of (6) core samples from semi-random <br />locations in an even spread of each sampling area. <br />b. Use the soil sampling probe to penetrate three feet into the solids stockpile for each grab <br />sample. <br />c. Samples taken within each sample area should be placed within its own labelled 5-gallon <br />bucket. <br />5. Homogenize and composite samples according to the following instructions: <br />a. Completely homogenize the contents of each 5-gallon bucket, without mixing contents <br />between buckets. Manually break up any large chunks of solids into smaller pieces. Any <br />recognizable inert manufactured material found should be removed and noted. Clean your <br />mixing tool between buckets to prevent cross-contamination. <br />b. Place a measured volume of solids from each filled bucket into the bucket labelled “7” or <br />“Composite”. Remove debris from the measuring tool and trowel and repeat this step for <br />each of the buckets labelled 1 through 6, ensuring the samples moved into the composite <br />are of equal volume. <br />c. Remove debris from tools and homogenize field composite bucket. <br />6. Collect samples into their associated containers. Each area and the composite should be placed <br />into two containers. <br />7. Transport samples and completed Chain of Custody to lab and inform Biosolids Manager that <br />sampling is complete. <br />8. Clean and store equipment. <br />