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UST Closure Report 0 0 <br /> Sharpe Defense Distribution Region West <br /> Lathrop,California Page i <br /> TABLE OF CONTENTS <br /> Page <br /> 1.0 INTRODUCTION..................................................................................................................1 <br /> 1.1 Purpose and Scope of Work.................................................................................................1 <br /> 1.2 Report Organization...................................................................................:.........................1 <br /> 2.0 SITE DESCRIPTION AND BACKGROUND....................................................................2 <br /> 2.1 Lithology of Sediments in Pre-UST Installation Test Hole.................................................3 <br /> 3.0 REGULATORY REQUIREMENTS AND PERMITS......................................................4 <br /> 2.1 UST Federal Regulations.....................................................................................................4 <br /> 2.1.1 UST Closure.................................................................................................................4 <br /> 2.1.2 Identification of Hazardous Materials .........................................................................4 <br /> 2.1.3 Transportation and Disposal........................................................................................4 <br /> 2.2 State of California UST Regulations...................................................................................4 <br /> 2.3 Local Requirements.............................................................................................................4 <br /> 2.3.1 San Joaquin County Public Health Services Environmental Health Division.............4 <br /> 2.3.2 Defense Depot Sharpe Fire Department......................................................................5 <br /> 3.0 FIELD ACTIVITIES.............................................................................................................5 <br /> 3.1 Introduction..........................................................................................................................5 <br /> 3.1.1 Personnel......................................................................................................................5 <br /> 3.1.2 Equipment.......................... ... 6 <br /> 3.2 UST Removal.......................................................................................................................6 <br /> 3.2.1 Site Preparation............................................................................................................6 <br /> 3.2.2 UST and Piping Rinsing..............................................................................................6 <br /> 3.2.3 UST Inerting................................................................................................................7 <br /> 3.2.4 Excavation....................................................................................................................7 <br /> 3.2.5 Removal of USTs.........................................................................................................7 <br /> 3.2.6 Removal of Dispenser Islands and Piping...................................................................8 <br /> 3.3 Stockpiling Excavated Material...........................................................................................8 <br /> 4.0 SAMPLING AND ANALYTICAL PROGRAM................................................................9 <br /> 4.1 Sample Collection..............................................................................................................10 <br /> 4.1.1 Stockpile Samples (SP-1 through SP-29)..................................................................10 <br /> 4.1.2 Excavation Floor Samples (T-1W through T-7W, IE through 7E and Tank 8)........11 <br /> 4.1.3 UST Groundwater Samples (H2O #1 through#7).....................................................11 <br /> 4.1.4 UST Sub-Holddown Pads Samples (South, Center and North).................................11 <br /> 4.1.5 Stockpiles SPA and SPB Samples (SP-1-SH through SP-16-SH) ............................11 <br /> 4.1.6 Excavation Groundwater Sample (GW-1-P).............................................................12 <br /> 4.1.7 Stockpile SPA Samples (SPA-1 to—12 and SPB Samples SPB-1 to—10)................12 <br /> 4.1.8 Piping Excavation Stockpile SPC Samples (SPC-1 to SPC-5)..................................12 <br /> 4.1.9 Product Piping Excavation Samples (PL-1 to PL-11) ...............................................12 <br /> 4.1.10 Stockpile SPD Samples (SPD-1 to SPD-20) .............................................................13 <br /> 4.2 Sample Handling................................................................................................................13 <br /> 5.0 RESULTS OF CHEMICAL ANALYSES.............................................•...........................13 <br /> 5.1 UST Excavation Floor Soil Samples .17 <br /> 5.2 UST Excavation Floor Groundwater Sample....................................................................18 <br /> 5.3 UST Excavation Stockpiles Samples.................................................................................18 <br /> NAPR0JECTS\3546\Reports\3546 UST Closure Report DraR.doc March 24,1999 <br />