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' Job No. 4780200 Page 3 <br /> 3.0 FIELD INVESTIGATION <br /> 3.1 Boring Advancement <br /> ' EZC, Inc. visited the subject site on April 6, 1993. Also present were Spectrum <br /> Exploration of Stockton, to perform drilling services, and Ms. Mary Meyes of <br /> ' the SJCPHS, to observe the field operations. Boring and soil sampling were <br /> ' performed according to protocol presented in our workplan for this investigation <br /> dated December 23, 1992. <br /> ' The soil boring (B-2) was advanced in the vicinity of the former location of a <br /> ' 2,000-gallon, unleaded gasoline UST and a 1,000-gallon diesel UST. The <br /> location of this boring is shown in Figure 2. Soil samples were collected at <br /> ' 5-foot intervals, then brought back to the offices of EZC, Inc. and kept <br /> refrigerated under lock and key. During the advancement of the boring, a <br /> strong hydrocarbon odor was detected in the soil cuttings. The horizon at <br /> which the odor was detected originated at approximately 15 feet below ground <br /> ' surface (bgs). <br /> ' Groundwater was encountered at approximately 55 bgs. After groundwater <br /> was encountered, the auger was raised approximately 2-3 feet to allow the <br /> groundwater to seep into the boring. A groundwater sample was then <br /> collected from the boring down the auger by means of a bailer. <br /> A second boring (B-3) was drilled on the opposite (eastern) side of the UST <br /> ' excavation. The location of soil boring B-3 is shown in Figure 2. Soil samples <br /> were collected from this boring and brought back to EZC. During the drilling of <br /> ' this boring EZC was directed by Mr. Allen Law (client) to terminate all field <br /> activities at the subject site. The depth of boring B-3 at this time was <br /> approximately 35 feet. <br /> EC, inc. April 20, 1993 <br />