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' Report-Soil and Groundwater Investigation <br /> Herman&Helen's Marina <br /> September 30, 1996 <br /> Page-6- <br /> Two (2) additional soil samples were retained from selected boreholes for geotechnical <br /> ' analyses. The soil samples were capped, wrapped with duct tape, and labeled. The sample I.D.'s <br /> are as follows: 1432-GP1-8' and 1432-GP3-10'. The geotechnical samples were shipped, under <br /> ' chain-of-custody procedures, to Cooper Testing Laboratory of Mountain View, California. <br /> ' 3.4 Groundwater Sampling <br /> The Geoprobe groundwater sampler is designed to be hydraulically pushed into the aquifer <br /> from the bottom of a borehole, to collect a groundwater sample from a discrete zone (see Appendix B <br /> for a description of the Geoprobe groundwater sampling system). The sampler utilizes a sealed, <br /> water-tight, stainless steel sample chamber and PVC screen which is isolated from the surrounding <br /> ' environment as the sampler is advanced. When the desired depth for collection of a groundwater <br /> sample was reached, the sample chamber was opened by pulling back on the body of the sampler, <br /> texposing the screen. When the screen was full, a small diameter teflon tube was lowered into the push <br /> rod and a groundwater sample was retrieved by use of a peristaltic pump equipped with a rubber <br /> sleeve. The teflon tubing and rubber sleeve were discarded after each sample was collected. <br /> ' The groundwater samples were inspected for free product, petroleum odor, and sheen. Each <br /> sample was gently poured into two (2) 40-m1 glass volatile organic analyses (VOA) vials, and one (1) <br /> ' 1-liter amber glass bottle. The sample containers were sealed, labeled, and placed in a cooler <br /> chilled with ice for delivery under chain-of-custody procedures to GeoAnalytical Laboratories, in <br /> Modesto, California for analyses. <br /> ' 3.5 Chemical Analysis <br /> The soil and groundwater samples collected for chemical analysis were analyzed for benzene, <br /> ttoluene, ethyl benzene, and total xylenes (BTEX) by EPA Method 8020 (602 for water), for total <br /> petroleum hydrocarbons quantified as gasoline (TPH-G) by Method 5030/LUFT, for total extractable <br /> ' petroleum hydrocarbons, quantified as diesel, motor oil, and kerosene (TEPH) by Method <br /> 3505/LUFT (3015/LUFT for water), and for methyl tertiary butyl ether (MTBE) by EPA Method <br /> ' 8020 and 8260. The results of the soil and groundwater analyses are presented in Sections 3.5.1 and <br /> 3.5.2, below. <br /> t �M CONDOR <br />