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Z1 INC <br /> • exception of 1,1,1-trichloroethane at a depth of two feet (0 009 ppm) and trichloroethane <br /> at two feet (0 046 ppm), and five feet (0 011 ppm) VOCs were reportedly not detected <br /> in any boring D-4 samples No petroleum hydrocarbons were detected in any boring D-4 <br /> samples with the exception of 11 ppm diesel and 97 ppm total petroleum hydrocarbons <br /> at a depth of 10 feet <br /> 4.5 Concrete Tank <br /> Three borings were drilled around the perimeter of the concrete tank as shown on Exhibit <br /> 8 As shown on Exhibit 8, the concrete tank is bordered on two sides by the LCN office <br /> building Two vertical borings were drilled immediately adjacent to the tank (borings T-1 <br /> and T-2) and one boring was drilled at an approximate 45 degree angle under the tank <br /> (boring AB-1) Boring logs are included in Appendix I <br /> Boring T-1 was drilled to a total depth of 26 5 feet Samples were collected for laboratory <br /> . analysis at five foot intervals to the total depth of the boring Soils encountered in boring <br /> T-1 consisted of yellow-tan, fine to very fine sands, and silty sands with a silty clay <br /> occurring from approximately 11 5 to 13 feet <br /> Boring T-2 was drilled to a total depth of 36 5 feet with samples collected for laboratory <br /> analysis at five foot intervals Soils consist of interbedded sands and clays with sands <br /> containing varying components of silts and clays <br /> Boring AB-1 was drilled to a total length of 37 5 feet which corresponds to a vertical <br /> depth of approximately 25 feet Soils encountered were similar in character to those <br /> encountered in Boring T-2 Samples were collected for laboratory analysis at depths of <br /> approximately 16, 20, and 25 feet below ground surface These depths correspond to <br /> depths below the tank of approximately 4, 8, and 13 feet, respectively <br /> 12270010 013 Page 12 <br />