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� t <br /> • <br /> envrros® <br /> Analysis for fractional organic carbon content (FOC) was performed on the soil sample <br /> from Boring SB-1 at 18 fbg and from Boring SB-10 at 12 fbg This analysis was <br /> performed by Sequoia FOC was found to be 0 070% in the sample from SB-1 and <br /> 0 080% in the sample from SB-10 <br /> 4.0 CONCLUSIONS <br /> Soil Borings SB-1 through SB-10 have delineated the vertical and lateral extent of <br /> petroleum hydrocarbons detected in soil during UST and product pipe line removal in <br /> December 1994 <br /> The vertical extent of petroleum hydrocarbons in the northwestern dispenser area appears to <br /> be limited to depths less than 18 fbg The vertical extent of petroleum hydrocarbons in the <br /> southeastern dispenser area appears to be limited to depths less than 16 fbA Analysis of <br /> soils in this area for TCLP benzene was ND <br /> All soil borings drilled to delineate the lateral extent of petroleum hydrocarbons in soil were <br /> ND for TPPH and benzene with the exception of SB-3 and SB-4 Soil Boring SB-3 was <br /> located approximately 9 feet northwest of the dispenser island and contained 770 ppm <br /> TPPH and ND levels of benzene at 9 fbg Soil Boring SB-4 was located approximately 16 <br /> feet northwest of the dispenser island and contained TPPH concentrations ranging from 3 5 <br /> to 5 4 ppm, and benzene concentrations ranging from 0 008 to6 ppm— <br /> • Base on the data presented in his report; we-�fepectfully request that site closure be <br /> granted <br /> If you have any questions regarding the contents of this document, please call <br /> Sincerely, <br /> Enviros, Inc <br /> Joe W Neely <br /> Project Geologist �oQRWss/av <br /> �2��, LU,y�QGFyy <br /> Diane M Lundq st, P E <br /> Senior Engineer NO 046725 <br /> 046725 lqj£ CIVIL <br /> OF CAO <br /> 372 4 <br />