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Section 4 <br /> Presentation of Analytical Data <br /> 1 <br /> 1 During the investigation, thirty two soil samples were collected for TPH analysis The results <br /> of the soil analyses are summarized in Table 4-1 Copies of all laboratory reports are <br /> presented in Appendix D <br /> 1 <br /> TABLE 4-1 <br /> SUMMARY OF LABORATORY RESULTS <br /> BORING NO TPH RESULTS(ppm) BORING NO TPH RESULTS(ppm) <br /> 1 B3-5' ND B7-5' ND <br /> B3-10' ND B7-10' ND <br /> B3-15' ND B7-15' ND <br /> 1 B3-20' ND 138-5' ND <br /> 134-5' ND B8-10' ND <br /> B4-10' ND B8-15' 6500(diesel) <br /> B4-15' 830(diesel) 5400 (bunker fuel) <br /> 5600(bunker fuel) B8-20' ND <br /> B4-20' ND B9-5' ND <br /> 134-25' ND B9-10' ND <br /> 135-5' ND B9-15' ND <br /> 135-10' ND B9-20' ND <br /> 1 B5-15' ND B 10-5' ND <br /> 135-20' ND B10-10' ND <br /> B6-5' ND B10-15' ND <br /> 136-10' ND <br />' B6-15' 5400(diesel) <br /> 9600(bunker fuel) <br /> B6-20' ND <br /> 1 ND Not Detected above laboratory detection limits <br /> Laboratory detection limits for TPH = 1 ppm for soil <br />' As shown in Table 4-1, diesel and bunker fuel range TPH compounds were reported in three <br /> soil samples collected from around the UST Petroleum hydrocarbons were detected in the 15- <br /> foot samples from borings 134, 136 and B8 Diesel-range hydrocarbons ranged from 830 ppm <br /> in boring 134 to 6500 ppm in boring B8, while bunker fuel concentrations ranged from 5400 <br /> ppm in boring 138 to 9600 ppm in boring B6 All other samples reported non-detectable <br /> concentrations of TPH compounds Figures 5 and 6 present the estimated extent of <br /> jr <br /> hydrocarbon impacted soil, in plan and cross-section view <br />' TETRA TECH Stockton Developmental Center,Phase iI Site investigation Report Page 12 <br />