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CSK Auto#4025 GeoTek Project No.:BC 122-4025 <br /> Tracy,California 95376 Page 5 of 5 <br /> March 7,2000 <br /> 4.0 CONCLUSIONS AND RECOMMENDATIONS <br /> GeoTek has performed soil sampling of the subject site in substantial compliance with <br /> CSK Auto Contract Number A-196847, CSK's Phase II authorization letter, dated <br /> January 18, 2000 along with other written and verbal scope modifications. <br /> Data developed through this Phase II ESA is sufficient to confirm the presence of TPH, <br /> which are indicative of a petroleum product release at the subject site. The State of <br /> California requires that a Risk Based Assessment be conducted to determine the MCLs of <br /> the TPH detected in soil. GeoTek recommends that supplemental testing be performed to <br /> further define the limits of TPH contamination in soils at the site and that a Risk Based <br /> Assessment be conducted as required by the State of California. <br /> The findings, conclusions and recommendations made in this report are based on the <br /> sampling and analysis of the on-site soils. The information is relevant to the date of our <br /> site work and should not be relied on to represent conditions at any later date. The <br /> opinions and conclusions expressed herein are based on information obtained during our <br /> assessment and on our experience and current standards of technical practice. GeoTek <br /> makes no other warranties, either express or implied, concerning the completeness of the <br /> data furnished to us. This report is not and should not be construed as a warranty or <br /> guarantee about the presence or absence of environmental hazards or contaminants that <br /> may affect the subject site. Facts, conditions, and acceptable risk factors change with <br /> time; accordingly, this report should be viewed within this context. <br />