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r' <br /> ESPANA <br /> 502 G�iuse <br /> Geotechnical }pe Court.Suite 11 <br /> Consulting Roses x+ <br /> Roseville,CA 956- <br /> g (916)--;_2600 <br /> FAN (916) h-'-.}S4t, <br /> November 17, 1999 <br /> Mr. Timothy Fleming <br /> Mark Thomas & Company Inc. _ <br /> 7300 Folsom Boulevard, Suite 203 (.7: <br /> Sacramento, CA 95826-2622 <br /> Subject: Supplemental Preliminary Site Investigation <br /> State Route 99/Hammer Lane <br /> Interchange Improvement Project c <br /> Subtask J - Hazardous Materials w <br /> Dear Mr. Fleming: <br /> Enclosed is our Supplemental Preliminary Site Investigation for the Hammer Lane/Route 99 <br /> Interchange Improvement Project in San Joaquin County, California. This report includes the findings <br /> of our supplementary field investigation and our conclusions and recommendations regarding the <br /> studied sites. <br /> In summary, soils contaminated with petroleum hydrocarbons were encountered in the former tank <br /> area at the Auto Factory site (former Texaco station). Unidentified diesel hydrocarbons in the C 10 - <br /> C24 range were also detected within the ground water tested at this site. No detectable petroleum <br /> hydrocarbons were encountered in the soils tested within the suspected former tank pit area at the <br /> former Mobil Oil station; however, unidentified diesel hydrocarbons in the CIO - C24 range were <br /> detected within the ground water tested at this site. <br /> Thank you for the opportunity to work on this project. Please call us if you have any questions. <br /> Sincerely, j <br /> ESPANA7-, <br /> IINICAL CONSULTING <br /> c Patrick Fis er <br /> ichael Wilson, <br /> Staff Geologist R.G. 5599 <br /> H202R2.MTC <br /> I <br /> I <br />