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File No. 20-3941-01.E01 kn KLEINFELDER <br /> March 6, 1997 <br /> After collection, the soil sample will be labeled, logged on a chain-of-custody, and immediately <br /> stored in an iced cooler. Kleinfelder proposes submitting the five (5) soil samples from each <br /> boring (20 samples total for the four borings) to a State certified laboratory for the following <br /> analyses: <br /> • Total Petroleum Hydrocarbons Purgeable (Gasoline Range) by EPA Method�r'8015M/5030 <br /> [TPH-G] <br /> • Benzene, Toluene, Ethylbenzene, Xylenes by EPA Method 8020/5030 [BTEX] <br /> • Total Extractable Petroleum Hydrocarbons as Referenced to Diesel (TPH=D) by EPA <br /> Method 8015M <br /> The samples will be analyzed on an accelerated laboratory schedule requiring approximately one <br /> week(five working days) for completion unless an optional 24 to 48 hour analytical turnaround <br /> is requested by the client at an additional charge. <br /> Task E02(a) - Drilling of One Optional Soil Boring <br /> If hydrocarbons are detected in the field screening of the soil samples obtained in Task E02, one <br /> (1) additional soil boring will be advanced (vertically) to a depth of approximately 50 feet below <br /> surface grade(bsg) along the western edge of the canopy. <br /> During the advancement of the boring, soil samples will be collected at 5 foot intervals and will <br /> be examined for lithologic classification and qualitative field screening, with an organic vapor <br /> analyzer (OVA). The OVA measures ionizable compounds in air in parts per million by <br /> volume (ppmv). Lithologic classification will be based on the Unified Soil Classification <br /> System (USCS). The samples may also be retained for quantitative chemical analysis. <br /> Currently, based on your correspondence and our experience, we anticipate groundwater in the <br /> vicinity of the project site to be present at a depth of 65 feet bsg. Therefore, at this time, we <br /> propose to analyze only 5 soil samples from the boring (the 15 foot, 25 foot, 40 foot, 45 foot <br /> and 50 foot samples). <br /> 20-3941-0LE01/207PE075 Page 3 of 9 0 1997, Kleinfelder, Inc. <br />