Laserfiche WebLink
Due to the volatile nature of the BTEX soil-vapors, the preparation of split duplicate QC soil sample(s) <br /> was deemed unfeasible, since the volatile vapors could be lost during handling. While no blank <br /> samples were prepared and submitted to the laboratory, review of the analytical results of soil samples <br /> ' and the reported sensitivity levels indicate that the laboratory sensitivity is adequate. <br /> Soil samples collected for analysis were shipped to the laboratory on the day after coil,°ction, and were <br /> received by the laboratory two days following collection. All samples were preserved with ice <br /> ' immediately upon collection, and during shipping. <br /> Chain of custody forms accompanied the samples to the laboratory (see Appendix B). The laboratory <br /> ' reported that the samples were received in good condition. <br /> 8.0 CONCLUSIONS <br /> ' Based on the above-presented investigation, the following conclusions are offered: <br /> • Two diesel fuel ASTs, one 20,000 gallon capacity and one 8,000 gallon capacity, were <br /> installed at the subject site circa 1958 and were removed circa 1993; <br /> • Umetco personnel, performing site reclamation work, first noticed soil-vapor odors in <br /> August 1997; <br /> ' As requested, Tellco personnel performed field investigations on August 27, 1997; <br /> ' Umetco personnel utilized a track hoe to perform exploratory excavations (trenches). <br /> There is a sandstone caprock layer present at depths ranging from 0.5 feet to 3.0 feet <br /> below the ground surface, overlain with soil, in the area of the fuel spill; <br /> • A total of 39 direct PID field measurements, ranging from 0 to 900 ppm, were collected <br /> during this investigation. Additionally, 7 (representing approximately 18% of the total <br /> ' number) replicate (QC) direct PID field measurements were taken; <br /> 16 <br /> 1 <br />