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v _ <br /> TETRA TECH, INC. <br /> TABLE OF CONTENTS <br /> 1.0 INTRODUCTION..........................................................................................1-1 <br /> 1.1 PURPOSE OF THE PLAN..............................................................................................1-1 <br /> 1.2 PROPERTY DESCRIPTION..........................................................................................1-1 <br /> 1.3 SITE HISTORY AND PREVIOUS INVESTIGATIONS...............................................1-1 <br /> 1.4 SUMMARY OF PLANNED ACTIVITIES....................................................................1-1 <br /> 1.5 PERMITTING.................................................................................................................1-2 <br /> 1.6 PROJECT STAFFING....................................................................................................1-2 <br /> 2.0 SITE CHARACTERISTICS.........................................................................2-1 <br /> 2.1 TOPOGRAPHY, GEOLOGY,AND HYDROLOGY....................................................2-1 <br /> 2.2 ECOLOGICAL CHARACTERISTICS...........................................................................2-1 <br /> 2.3 LAND USE SURROUNDING THE SITES...................................................................2-2 <br /> 3.0 DATA QUALITY OBJECTIVES.................................................................3-1 <br /> 3.1 STEP 1: STATE THE PROBLEM..................................................................................3-1 <br /> 3.1.1 The Problem........................................................................................................3-1 <br /> 3.1.2 Conceptual Model...............................................................................................3-1 <br /> 3.1.3 Available Resources,Constraints,and Deadlines...............................................3-1 <br /> 3.2 STEP 2: IDENTIFY THE GOALS OF THE STUDY....................................................3-1 <br /> 3.2.1 The Primary Question.........................................................................................3-1 <br /> 3.2.2 Possible Alternative Actions...............................................................................3-2 <br /> 3.2.3 The Decision Statement......................................................................................3-2 <br /> 3.3 STEP 3: IDENTIFY INFORMATION INPUTS.............................................................3-2 <br /> 3.3.1 Type of Information Needed...............................................................................3-2 <br /> 3.3.2 Source of lnformation.........................................................................................3-2 <br /> 3.3.3 Determination of Screening Levels....................................................................3-2 <br /> 3.3.4 Sampling and Analysis Methodology and Comparison Values..........................3-2 <br /> 3.4 STEP 4: DEFINE THE BOUNDARIES OF THE STUDY............................................3-3 <br /> 3.4.1 Target Population................................................................................................3-3 <br /> 3.4.2 Spatial and Temporal Boundaries and Other Practical Constraints....................3-3 <br /> 3.4.3 Scale of Inference...............................................................................................3-4 <br /> 3.5 STEP 5:DEVELOP THE ANALYTIC APPROACH....................................................3-4 <br /> 3.5.1 Screening Levels.................................................................................................3-4 <br /> 3.5.2 Decision Rules....................................................................................................3-4 <br /> 3.6 STEP 6: SPECIFY THE PERFORMANCE OR ACCEPTANCE <br /> CRITERIA.......................................................................................................................34 <br /> 3.6.1 Baseline and Alternative Conditions..................................................................3-4 <br /> 3.6.2 Consequences of Decision Errors.......................................................................3-4 <br /> 3.7 STEP 7:DEVELOP THE PLAN FOR OBTAINING DATA.........................................3-5 <br /> 3.7.1 Selecting a Sampling Design..............................................................................3-5 <br /> 3.7.2 Key Assumptions Supporting the Selected Design............................................3-5 <br /> 4.0 FIELD SAMPLING PLAN............................................................................4-1 <br /> 4.1 GENERAL INFORMATION..........................................................................................4-1 <br /> 4.2 SITE LOGISTICS............................................................................................................4-1 <br /> 4.2.1 Site Access..........................................................................................................4-1 <br /> 4.2.2 IDW Container Storage......................................................................................4-1 <br /> 4.2.3 Schedule..............................................................................................................4-1 <br /> 4.2.4 Site Restoration...................................................................................................4-1 <br /> Sampling Effort Work Plan Page i <br /> Tracy Mansfield Property <br />