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groundwater investigation Field work was performed March 23 and 24, 1999 by <br /> Gallardo, as proposed and accepted by PHSIEHD A report summarizing findings was <br /> forwarded to WO&S`s Jeff Hopkins on May 24, 1999 by Rafael L Gallardo <br /> 7 <br /> 1,1.1 Work Prior to November 2000 <br /> The following is extracted -from he Gallardo Report found in Appendix E <br /> On October 22, 1987, two 20,000 GA underground storage tanks (USTs) used to store <br /> liquid cutback asphalt, one 1,000 GA-UST used to store diesel fuel, and one 500 GA UST <br /> used to store gasoline fuel were removed from the site property Analytical results <br /> collected during the tank removals indicated petroleum impacted surrounding sod A <br /> ' monitoring well (MW-1) was installed near the removed 20,000 GA UST removal <br /> excavation <br /> 1.12 Work After October 2000 <br /> ' Additional characterization of the pollution extent and its impact on groundwater was <br /> conducted by D K Barber P E and Associates from October 2000 through June 2004 <br /> Bonngs were Initiated on November 13, 2000 Groundwater was not encountered until <br /> about 50 FT below ground surface (bgs) after very slow boring progress and operational <br /> problems The depth and sod material showed the direct push technology (DPT) ng to be <br /> ' too light duty and efforts were suspended awaiting clear weather and availability of a <br /> heavier DPT ng Boring resumed December 4, 2000 Equipment problems again resulted <br /> 1 in suspension of site work until December 13 and 15, 2000 and January 4, 2001 activities <br /> Soil samples were collected at five FT intervals to groundwater approximately 52 FT bgs <br /> ' Soil samples were field classified using either a geologist or registered civil engineer Grab <br /> water samples were collected in boreholes and the constructed monitoring well <br /> Stellar Environmental Solutions (SES), of Berkeley, CA , a Geoscence & <br /> Engineering Consulting firm, assisted with field classification, sample collection and <br /> graphical presentation A SES California registered geologist and a second senior <br /> geologist were on the site during several different days to log the exploratory bores and <br /> establishing the site lithology The report included graphical boring logs and brief <br /> summary of findings <br /> ' 1-2 <br />