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t, . <br /> Aqua Terra Technologies <br /> • with Lonestar No. 3 washed sand. <br /> A bentonite seal, approximately two feet thick, was placed <br /> above the sand. The annulus above the seal was backfilled <br /> with a thick, cement/bentonite grout. Tremmie methods were <br /> used to place the grout. The well was completed <br /> �r^ approximately 20 inches above-grade. The well head was <br /> .: secured by a locking well cap and protected by steel <br /> bollards. Well details are presented on the boring log in <br /> r7 Appendix 1. <br /> I : <br /> The well was developed using a dual hose airlift pump system. <br /> r, The equipment used to develop the well was steam cleaned <br /> prior to its use in the well. Approximately 135 gallons of <br /> water were removed during well development. <br /> Contaminated Materials Control <br /> Soil cuttings from the boring were placed in an open area <br /> near the boring and covered with plastic. The water <br /> generated by well development was discharged onto the ground <br /> surface, approximately 300 feet from the well. <br /> Groundwater Sampling <br /> On May 23 , 1986, the groundwater monitoring well was sampled <br /> using a three-foot Teflon bailer which was steam cleaned <br /> prior to use. The well was bailed of approximately five to <br /> ten well casing volumes to remove stagnant water in the well <br /> r and ensure the collection of a representative sample. Water <br /> removed from the well prior to sampling was discharged to the <br /> ground surface. The water level in the well was then allowed <br /> to equilibrate before the groundwater sample was collected. <br /> j ' The groundwater sample was collected in one liter glass <br /> bottles fitted with Teflon lined closures and immediately <br /> placed on ice. <br /> I '. SAMPLE ANALYSIS <br /> LJ <br /> The soil and groundwater samples were delivered on ice to <br /> California Analytical Laboratories, a laboratory certified by <br /> the State of California Department of Health Services (DHS) . <br /> The samples were accompanied by a Chain of Custody record. <br /> The samples were analyzed by gas chromatography (GC) for <br /> total hydrocarbons, and benzene, xylene, and toluene <br /> according to EPA Method 8020 for soil and EPA Method 602 for <br /> water. Analytical laboratory results are presented and <br /> summarized in Appendix 2 . <br /> W . <br /> 2 <br /> d <br />