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lit A S S O C I A T E S I N C <br /> i� <br /> May 28, 2002 <br /> t54 17292 0001 <br /> Mr Jeff Wong <br /> ' San Joaquin County EHD <br /> 304 E Weber Street, Third Floor <br /> ' Stockton, California 95202 <br /> Subject Supplemental Subsurface Investigation at Franklin High School, 300 North Gertrude <br /> Avenue, Stockton, California <br /> Dear Mr Wong <br /> ' ATC Associates Inc has completed the Additional Subsurface Investigation of the above <br /> referenced site The attached report summarizes our activities and findings Based on the <br /> ' analytical results and field observations, soil and groundwater beneath the location of the former <br /> UST do not appear to be currently impacted by petroleum hydrocarbon constituents at depths at <br /> or below 50 feet bgs, the depth of the shallow soil sample The soil samples collected from 50 <br /> M feet and 91 feet bgs at borings CPTI and CPT2, did not contain detectable concentrations of <br /> petroleum hydrocarbons including MTBE Groundwater collected at depths of 93 feet bgs did <br /> not contain detectable concentratioins of petroleum hdyrocarbons including MTBE <br /> ' In the judgment of ATC, additional investigation does not appear necessary to further define <br /> petroleum hydrocarbons concentrations in the subsurface <br /> ' IfY ou should have any questions or comments regarding this report or our recommendations, please <br /> feel free to call us at your convenience at (209) 579-2221 <br /> ' <br /> Respectfully submitted <br /> P Y <br /> ' ATC Associates Inc <br /> Jo Sellman <br /> ' Staff Geologist �`rs� 'rr <br /> Ho <br /> ' $� 01W <br /> 9 <br /> J anne Homsey, LXP �o ; <br /> CA Registered Civil Engineer No 474 10 <br /> cc Mr Butch Schmidt, Stockton Unified School District <br /> Mr Mark List, RWQCB <br /> 1 <br />