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.M <br /> PHASE I ENVIRONMENTAL S=ASSESSMENT AND SOIL.SAMPLING REPORT <br /> Lodi,California <br /> Shell Purchase Order No. <br /> Delta Project No.40-90-838 <br /> Page 7 <br /> 5.4 Decontamination and Groutin <br /> All drilling and sampling equipment were cleaned before each soil boring was drilled using a high-pressure <br /> steam cleaner. The California split-spoon sampler was cleaned with phosphate-free soaps and rinsed with <br /> water following each sample collection. All soil borings were backfilled with a neat cement grout on <br /> November 9, 19%. <br /> TABLE 2 <br /> Chemical Analysis of Soil Samples (ppm) <br /> Date Sample Depth Ethyl- <br /> Soil Boring Collected in Feet Benzene Toluene benzene Xylenes TPHa <br /> SB-1 11/09/90 5 <0.005 <0.005 <0.005 <0.005 <1A <br /> 11109/90 14 <0.005 <0.005 <0.005 <0.005 <1.0 <br /> SB-2 11/09/90 5 <0.005 <0.005 <0.005 <0.005 <1.0 <br /> 11109/90+ 14 <0.005 <0.005 <0.005 <0.005 <1.0 <br /> SB-3 11/091'90; 5 <0.005 <0.005 <0.005 <0.005 <1.0 <br /> 11/091'90:; 14 <0.005 <0.005 <0.005 <0.005 <1.0 <br /> 'Total petroleum hydrocarbons�as gasoline. . <br /> k � <br /> li <br /> i <br /> 6.0 SUMMARY <br /> 6.1 Site Reconnaissance <br /> Delta did not identify any adverse environmental conditions at the site during the site walk-through on <br /> November 9, 1990. The site appears to be unused at this time. An irrigation ditch was the only feature <br /> observed on the site. <br /> ,1 <br /> t <br />