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1 <br /> ' Remediation System Installation and Start U Re <br /> y P ort P <br /> RIPON FARM SERVICE <br /> 22871 South Highway 99, Ripon, California <br /> 1.0 INTRODUCTION AND SCOPE OF WORK <br /> At the request of Mr Allan Fetters, Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> report for corrective action activities conducted at 22871 South Highway 99, Ripon, California(the <br /> site) The location of the site and its surroundings are illustrated in Figure 1 Structures and -fh er yrs <br /> monitoring and remediation well locations associated with the site are depicted in Figure 2 4r& a -V <br /> '''416�1�q, 2 <br /> This report documents the installation of nine vapor extraction wells and four air-spargmg wells, <br /> ' sampling activities performed, and presents results of laboratory analysis of the soil samples 1116-1"" <br /> collected A soil vapor extraction system was installed during November 2000 and February 2001 a r'e" f <br /> System operation was initiated in December 2000 Additionally a ground water monitoring event . <br /> ' was conducted in April 2001 Cmc' <br /> T Pis z' - <br /> Background information, including details of previous site assessment work, was presented in the <br /> ' Corrective Action Plan prepared by AGE, dated 01 June 1999 <br /> • 2.0. PROCEDURES <br /> ' All field work was performed in accordance with Central Valley Regional Water Quality Control <br /> Board(CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites Field <br /> procedures for well installation and soil sampling are described below The work was preformed in <br /> ' accordance with procedures outlined in the Revised Remedial Action Work Plan Addendum and <br /> Remedial Action Work Plan, as approved by the San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS-EHD), by letter dated 21 April 2000 <br /> 2 1 DRILLING AND SAMPLING <br /> ' On 25, 26 and 27 April 2000, four air-sparge well pilot borings and eleven soil vapor extraction well <br /> pilot borings were advanced at the site The soil borings were advanced using a CME-75HT drill ng, <br /> ' equipped with 8 25-inch diameter hollow-stem augers The drill rig and two-pian crew were supplied <br /> by Mitchell Drilling Environmental Auger returns generated by dnllin.�,were stored on-site on <br /> visqueen plastic, pending laboratory analysis ,�,bA <br /> 1 1-1 � �p rta s <br /> Soil samples were collected from air-sparge pilot borings LAS 1 to IAS4 ahead of the drill bit using <br /> a core barrel Soil was then manually collected in pre-cleaned 2-inch by 6-inch brass sleeves <br /> ' samples were collected from vapor extraction well pilot borings VW3A throe VW 11 at five- <br /> foot <br /> sa p P P g � <br /> ' foot intervals or at the terminal depth of the soil boring, beginning at 5 feet bsg, using a 140-pound <br /> hammer to advance the sampler <br /> Advanced GeoEnvxronmental,Inc <br /> 1 <br />