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1 <br /> ' 1.0 INTRODUCTION <br /> American Geological Services, Inc (AGS) has developed these Standard Operating Procedures <br /> (SOPs) and stringent Quality Assurance and Quality Control (QA/QC) procedures for all project <br /> activity These QA/QC procedures insure that a high level of confidence is maintained on all <br /> ' collected data, and the conclusions and recommendations derived from this data American <br /> Geological Services, Inc believes that it is extremely important to collect as representative a <br /> sample as possible and to describe that sample thoroughly at the time and place of collection <br /> This document summarizes the SOPs and QA/QC procedures proposed by AGS for work at the <br /> Tracy Cold Storage site These procedures contained in this document and the attached forms <br /> ' should be considered proprietary and confidential. <br /> Prior to the beginning of field data collection the Quality Level of the project investigation must <br /> ' be determined The importance of the field and analytical data relative to the risks of the study <br /> determine the Quality Level required General descriptions of the Quality Levels are listed below <br /> ' Quality Level 1 Projects with relatively low risk involving a simple scope, narrow focus, and <br /> low budget, such as preliminary assessments <br /> Quality Level 2 Projects related to hazardous waste sites, waste supply development, permit <br /> applications, Remedial Investigations and Feasibility Studies, and enforcement cases <br /> Quality Level 3 Projects with high risk which will be intensely scrutinized such as waste <br /> management facilities, power plants, and enforcement cases <br /> ' Stringent steps are taken to ensure that all field and analytical data are complete and accurate <br /> The following procedures are utilized with all data <br /> Verification All field and analytical data entered into data bases or various software applications <br /> yt Pp <br /> ' are verified with the original field and analytical sheets, and that these entries fall within <br /> the range of valid values <br /> Validation Comparison of data to nearby sample intervals, sample duplicates, or sample <br /> replicates to ensure that highly skewed data are noted and qualified during interpretation <br /> For projects involving the collection of a large number of samples from the same media, <br /> ' such as a soil grid, an Analysis of Variance will be conducted <br /> Documentation Standardized procedures are followed to ensure that only verified and validated <br /> Mdata are utilized for interpretation and final documentation <br /> American Geological Services, Inc. <br /> 1 <br />