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� v <br /> u <br /> } A S S O C I A T E S I N C <br /> After presenting the results of the soils investigation to PHS/EHD in a report prepared by <br /> Helmick and Lerner Inc titled Preliminary Site Assessment for Underground Storage Tank <br /> Stockton Unified School District - Franklin High School dated October 10, 1991, PHS/EHD <br /> requested additional work at the site <br />' Helmick and Lerner Inc subsequently submitted a workplan titled Work Plan for Installation of <br /> Monitoring Well, Franklin High School - Stockton Unified School District dated February 6, <br />' 1998 The workplan purposed methods and procedures to evaluate whether or not petroleum <br /> hydrocarbons have migrated through soil and into groundwater with the installation of a single <br /> monitoring well This workplan was approved by PHS/EHD, in correspondence dated March 25, <br /> 1998 <br />' 2.0 METHODS AND PROCEDURES <br /> To evaluate whether or not petroleum hydrocarbons have migrated through soil and into <br />' groundwater, one soil boring was advanced in the vicinity of the former UST and completed as a <br /> groundwater monitoring well All field activities were performed in accordance with Helmick <br /> and Lerner's Work Plan for Installation of Monitoring Well, Franklin High School - Stockton <br />�) Unified School District and ATC's Site Safety Plan and Quality Assurance/Quality Control Plan <br /> (QA/QC Plan) submitted to PHS/EHD on February 1, 1999 <br />' 2.1 Sail Boring Advancement and Sampling <br />' Drilling was conducted on February 24, 1999 by V & W Drilling (State C57 license no 720904) <br /> utilizing a hollow stem auger drill rig The soil samples from soil boring MW1, advanced to 62 <br /> feet bgs, were collected at five-foot intervals or significant changes in lrthology, using a 2-inch <br />' diameter split-spoon sampler containing three brass tubes A field geologist logged drill cuttings <br /> and soil samples utilizing the Unified Soil Classification System <br /> The drill cuttings were characterized for soil type, moisture content, and visual evidence of <br /> petroleum hydrocarbons A flame ionization detection meter (FID) was used as a field screening <br /> device for the detection of petroleum hydrocarbon vapors in drill cuttings and cored samples <br />' Drill cuttings were temporarily stored on site in 55-gallon DOT approved steel drums <br /> Descriptions of soil types encountered and sample collection intervals are included on the <br /> boring/well construction logs contained in Appendix B Soil boring MWI. was advanced and <br />' completed as a groundwater monitoring well <br />' 2.2 Soil Sample Analysis <br /> Selected soil samples were placed on ice, and transported under chain-of-custody to Sequoia <br /> Analytical (ELAP #1210) of Redwood City, California for analysis All soil samples were <br /> analyzed for TPHg and BTEX utilizing EPA 8015 and 8020 methodologies, and oxygenate fuel <br /> w 1172921reportslsumwe1 doc 2 <br />