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21 October 2020 <br />Project No. 14-3002 <br />Page 9 of 15 <br /> PCBs were not detected above laboratory reporting limits in the concrete samples. <br /> <br />Analytical results of surface samples are summarized in Tables 1 and 2. PCB results and <br />the approximate extent of PCB-impacted soil above the DTSC-SL are depicted in <br />Figure 4. <br /> <br /> <br />5.3.2. Soil and Waste Samples: 3 Feet <br /> <br />A total of twenty-three (23) soil samples and two (2) waste samples were analyzed from <br />borings B44 through B53, B55 through B68 and B79. The following is a summary of <br />laboratory results: <br /> <br /> PCBs were detected in a total of seventeen (17) soil samples at concentrations <br />ranging from 0.12 mg/kg in B57 to 12 mg/kg in B66. <br /> PCBs were detected in both waste samples at concentrations of 48 mg/kg in B44 <br />and 0.15 mg/kg in B56. <br /> PCBs were detected above the DTSC-SL in eleven (11) samples and above the <br />ESL in eight (8) samples. <br /> The maximum concentrations of PCBs were detected in B44, B47, B51, B53 and <br />B66 at concentrations of 48 mg/kg, 3.0 mg/kg, 1.2 mg/kg, 2.8 mg/kg and 12 mg/kg, <br />respectively. <br />Analytical results of samples collected at three (3) feet bsg are summarized in Tables 1 <br />and 3. PCB results and the approximate extent of PCB-impacted soil above the DTSC- <br />SL are depicted in Figure 5. <br /> <br /> <br />5.3.3. Soil and Waste Samples: 5 Feet <br /> <br />A total of twenty-two (22) soil samples and three (3) waste samples were analyzed from <br />borings B44 through B53, B55 through B68, and B79. The following is a summary of <br />laboratory results: <br /> <br /> PCBs were detected in a total of eleven (11) soil samples at concentrations ranging <br />from 0.083 mg/kg in B62 to 100 mg/kg in B47. <br /> PCBs were detected in the waste samples at concentrations of 33 mg/kg in B48, <br />1.1 mg/kg in B50 and 0.37 mg/kg in B51. <br /> PCBs were detected above the DTSC-SL in seven (7) samples and above the ESL <br />in six (6) samples. <br /> The maximum concentrations of PCBs were detected in B46, B47, B48, B52, and <br />B53 at concentrations of 5.8 mg/kg, 100 mg/kg, 33 mg/kg, 2.7 mg/kg, and