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6 November 1995 <br /> AGE-NC Project No. 95-0148 <br /> Page 3 of 4 <br /> 4.0. PROCEDURES <br /> 4.1. INSTALLATION OF SOIL LYSMIETERS AND SOIL SAMPLING <br /> For the installation of the lysimeters, the following procedures will be performed: <br /> 1. Notify the CVRWQCB at least 72 hours prior to commencement of any work. <br /> 2. Drill four borings using a truck-mounted drill rig equipped with continuous-flight, 8-inch <br /> diameter hollow-stem augers. Each boring will be drilled to a depth of approximately 5 feet. <br /> 3. Steam-clean auger flights after each boring. <br /> 4. Complete each boring as two-inch diameter lysimeters in accordance with manufactures <br /> specification. Lysimeter design is depicted in Figure 3. <br /> 5. Collect soil samples from the clay cap during the advancement of each boring, using an 18 <br /> inch split tube sampler. <br /> 6. Label soil samples on a chain-of-custody form. <br /> 7. Transport the soil samples to a State certified lab for permeability testing, by ASTM D.5084. <br /> 4.2. SAMPLING AND ANALYSIS OF LYSIMETERS <br /> For the collection of water samples from each lysimeter, the following procedures will be performed: <br /> 1. Prepare each lysimerter for sampling by removing installation water from each lysimeter. <br /> 2. Apply a vacuum of 18 to 20 inches of Mercury to the lysimeter. <br /> 3. Allow for vadose water to penetrate the porous receptacle in the lysimter. <br /> 4. Isolate the porous receptacle, then apply 15 psi of pressure to the lysimeters and collected <br /> sample in plastic containers. <br /> 5. Label water samples on a chain-of-custody form. <br /> 6. Store samples in ice and transport to a State certified laboratory for total lead, total dissolved <br /> solids (TDS) and turbidity by EPA methods 200.9, 160.1 and 180.1, respectively. <br /> 7. In the event that less than 50-m1 of vadose water is collected from the lysimters, laboratory <br /> analysis of the sample will not occur for total lead, due the minimum volume required to <br /> perform EPA method 200.9. <br />