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Appendix A <br /> Field Procedures <br /> • Page 2 <br /> 1 <br /> were collected using a split-spoon sampler equipped with clean, two-inch diameter, six-inch <br /> tlong brass tubes Samples and drill cuttings were described in the field using the USCS <br /> Sample tubes were sealed with teflon-coated sheets and plastic end-caps to reduce volatile <br />' hydrocarbon loss Selected samples were placed in an ice chest containing ice and submitted <br /> under chain-of-custody to a California-certified laboratory for analysis of TPH as gasoline and <br /> BTEX After sampling activities were completed, boring B l l was sealed to the surface with a <br /> cement grout in accordance with State and County regulations <br /> t <br /> Hydropunch Sampling <br /> Based on a depth-to-water measurement of 79 feet below grade in the domestic production <br />' well, boring B 10 was advanced to 78 feet, and a hydropunch sampling device was driven three <br /> feet The screened portion of the hydropunch was then exposed, and a water sample was <br /> collected using a clean polyethylene bailer The sample was decanted into appropriate sample <br /> containers The water sample was analyzed for TPH as gasoline and BTEX using EPA <br /> methods 8015 and 602, respectively <br />' Monitoring Well Construction <br /> tThe auger used to drill boring B10 was left in the ground pending test results from the <br /> hydropunch water sample Based on the sample results, boring BIO was converted four days <br />' later to monitoring well MW1 using two-inch diameter, flush-jointed, Schedule 40 PVC <br /> casing Slotted casing (0 01-inch) was used for the screened interval Number 2112 sand was <br /> placed in the well annulus as a filter pack The filter pack was extended from the bottom of the <br /> screened interval to approximately four feet above the top of the screened interval A three- <br /> foot thick bentonite seal was placed in the well annulus above the filter pack A grout seal <br /> consisting of Portland cement was placed into the well annulus above the bentonite seal The <br /> well was completed with a locking well cap and a flush-mounted, traffic-rated well cover An <br /> 1 <br />