Laserfiche WebLink
clay between 7 and 8 feet Dark-grey, saturated, fine <br /> silty sand containing a slight fuel hydrocarbon odor was <br /> Present to the bottom of the borehole at 9 feet . <br /> Groundwater was encountered at approximately 7 feet <br /> The soil profile encountered while advancing boring EP-4 <br /> consisted of 6 inches of concrete and gravel underlain by <br /> light-brown, moist silty clay to 3 feet Light brown clay <br /> containing little moisture was present to approximately 5 5 <br /> feet A slight odor , consistent with that of fuel hydro- <br /> carbons was present between 4 5 and 5 . 5 feet Light-olive <br /> colored compacted clay was encountered at 5 5 feet and <br /> continued to approximately 6 75 feet The hydrocarbon-like <br /> odor was intense in this interval . Dark-grey , fine silty <br /> sand was present between 6 75 and the bottom of the boring <br /> at approximately 8 5 feet The hydrocarbon-like odor was <br /> also intense in this interval Groundwater was encountered <br /> at approximately 7 8 feet <br /> Certified laboratory analyses of discrete soil and grab <br /> water samples from each of the ten borings advanced on site <br /> revealed the presence of detectable concentrations of fuel <br /> hydrocarbon compounds The results of these analyses are <br /> summarized in Tables 1 and 2 <br /> Table 1 <br /> Analytical Results of Subsurface Soil Samples Acquired <br /> at 2360 East Street , Tracy , CA <br /> March, 1994 <br /> Sample No TPH-D TPH-G B T E X <br /> and Depth (ppm) (ppm) (ppb) <br /> ----------------------------------------------------------- <br /> EP-1 @ 5 ' N D N D 12 N . D 14 22 <br /> EP-1 @ 6 5 ' N D 25 25 54 74 120 <br /> EP-2 @ 5 ' N D N . D N D N . D N D . 7 5 <br /> EP-2 @ 7 ' 6 8 220 1600 1200 2900 5300 <br /> EP-3 @ 5 ' 6 7 N D N D N D N D N D <br /> EP-3 @ 8 ' N D N D N D N D N D 5 7 <br /> EP-4 @ 5 ' N D 1 4 31 9 4 39 63 <br /> EP-4 @ 7 ' 8 6 3300 8100 9300 13000 51000 <br /> ----------------------------------------------------------- <br /> Method <br /> Detection 1 1 5 . 0 5 0 5 0 5 . 0 <br /> Limit <br /> *-An oil , not identified by the laboratory, -was-observed -- <br /> while advancing EP-1 <br /> Page 4 <br />