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S� <br /> Monitoring Well Installation and Quarterly Monitoring Report <br /> . ARROYO SMOG SHOP <br /> 3012 East Waterloo Road, California <br /> 1.0. INTRODUCTION <br /> At the request of Ms Erlinda Hernandez,Advanced GeoEnvironmental, Inc (AGE) has prepared <br />' this monitoring well installation and quarterly report for the property located at 3012 East Waterloo <br /> Road, Stockton, California The site and surrounding area are illustrated on Figure 1, structure, <br /> boring, and well locations are illustrated on Figure 2 Site background information is summarized <br />' in Appendix A Analytical data for soil analysis and ground water can be found in Tables 2 and 3, <br /> respectively <br />' 2.0. PROCEDURES <br />' Three ground water monitoring wells(MW-1,MW-2,and MW-3)were installed on 20 and 21 July <br /> 2005 and sampled on 05 August 2005 The scope of work was outlined in the AGE-prepared <br />' Monitoring Well Installation Work Plan, dated 15 March 2005 and approved by the San Joaquin <br /> County Environmental Health Department(EHD)on in a letter dated 01 April 2005 Field work was <br /> performed in accordance with guidelines issued by the Central Valley Regional Water Quality <br /> 10 <br /> Control Board for the investigation of underground storage tank (UST) sites <br /> 1 2 1 MONITORING WELL INSTALLATION, DEVELOPMENT, AND SURVEY <br /> On 20 and 21 July 2005, three soil borings were advanced at the site for the collection of soil <br />' samples and the installation of hree ground water monitoring wells (MW-1 through MW-3) The <br /> monitoring wells were developed on 25 July 2005, and surveyed on 04 August 2005 <br />' 2 1 1 Drilling and Sampling <br />' A CME-75 truck mounted drill rig was utilized to advance S 25-inch diameter hollow-stem augers <br /> to 70 feet below surface grade(bsg),the total depth of each boring The drill rig and three-man crew <br /> were supplied by Cascade Drilling,Inc of Rancho Cordova, California Auger returns generated by <br />' drilling were containerized in properly labeled Department of Transportation(DOT)-approved model <br /> 17H 55-gallon drums and stored on-site pending proper disposal <br />' Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler <br /> loaded with three pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected from the <br />' pilot borings at 5-foot intervals,beginning at 5 feet bsg, using a 140-pound hammer to advance the <br /> sampler The number of blows required to advance the sampler over each 6-inch increment of the <br /> • 12-inch sampling interval was recorded on the boring logs After sample recovery,both ends of <br /> Advanced GeoEnvironmental,Inc <br />