PEI/RP900-08 Recommended Practices for the Inspection and Maintenance of UST Systems
Recommended Practices for the Inspection and Maintenance of UST Systems CONTENTS Foreword...iii SECTIONS 1. Introduction 1.1 Origin...1 1.2 Background...1 1.3 Purpose...1 1.4 Scope...2 1.5 Sources...2 1.6 Use of Other PEI Recommended Practices...2 1.7 Importance of Competent Personnel...2 1.8 Regulations...2 1.9 The Energy Policy Act of 2005...3 2. Definitions 2.1 Appropriate Person...3 2.2 Authority Having Jurisdiction (AHJ)...3 2.3 Automatic Tank Gauge (ATG)...3 2.4 Ball-Float Valve...3 2.5 Cathodic Protection...3 2.6 Class I, Division 1...3 2.7 Class I, Division 2...3 2.8 Classified Area...4 2.9 Coaxial Vapor Recovery...4 2.10 Containment Sump...4 2.11 Fuel Dispenser...4 2.12 Drop Tube...4 2.13 Drop Tube Shutoff Valve...4 2.14 Emergency Shutoff Valve...4 2.15 Emergency Stop Switch...4 2.16 European Suction...4 2.17 Fill Adaptor...4 2.18 Fill Cap...4 2.19 Flexible Connector...4 2.20 Groundwater Monitoring...4 2.21 Interstitial Monitoring...4 2.22 Interstitial Space...4 2.23 Intrinsically Safe Circuit...5 2.24 Leak Detection...5 2.25 Line-Leak Detector...5 2.26 Lockout/Tagout (also known as Lock/Tag & Try)...5 2.27 Manhole...5 2.28 Material Safety Data Sheet (MSDS)...5 2.29 Monitoring Well...5 2.30 Observation Well...5 2.31 Overfill Alarm...5 2.32 Penetration Fitting...5 2.33 Personal-Protective Equipment (PPE)...5 2.34 Poppet...5 2.35 Pressurized-Pumping System...5 2.36 Probe...5 2.37 Qualified Person...5 2.38 Riser...6 v
PEI Recommended Practices 900-08 2.39 Safe Suction...6 2.40 Sensor...6 2.41 Schrader Valve...6 2.42 Soil Vapor Monitoring...6 2.43 Spill Bucket...6 2.44 Spill-Containment Manhole...6 2.45 Stage I Vapor Recovery...6 2.46 Stage II Vapor Recovery...6 2.47 Submersible Pump...6 2.48 Swivel Adaptor...6 2.49 Tank Gauge Stick...6 2.50 Tank Pad...7 2.51 Tank-Top Sump...7 2.52 Test Boot...7 2.53 Two-Point (Dual-Point) Vapor Recovery...7 2.54 Vapor-Recovery Adaptor...7 2.55 Vent Cap...7 3. Underground Storage Tank (UST) System Inspection 3.1 General...7 3.2 Why Inspect?...7 3.3 What to Inspect...8 3.4 When to Inspect...8 3.5 Who Should Inspect?...8 3.6 How to Inspect...8 3.7 Inspection Safety...9 4. Documentation 4.1 General...9 4.2 Record Location and Retention...10 4.3 Inspection Documentation...10 4.4 Maintenance Documentation...10 4.5 Site Information...10 4.6 Training Documentation...10 5. Safety 5.1 General...10 5.2 Responsibility...10 5.3 Personal-Protective Equipment...10 5.4 Vehicle Hazards...11 5.5 Chemical Hazards...11 5.6 Fire and Explosion Hazards...11 5.7 Electrical Hazards...12 5.8 Personnel Hazards...13 5.9 Confined Space Entry...13 5.10 Responding to Fuel Spills...13 6. Daily UST System Inspection Checklist 6.1 General...13 6.2 Purpose...13 6.3 Preparation...14 6.4 Leak Detection...14 6.4.1 Automatic Tank Gauge (ATG)...14 6.4.2 Electronic Leak-Detection Monitor...15 6.4.3 Mechanical Line-Leak Detector...15 6.4.4 Daily Inventory...15 vi
Recommended Practices for the Inspection and Maintenance of UST Systems 6.5 Tank Fill Area...16 6.5.1 Fill Cover...16 6.5.2 Spill-Containment Manhole...16 6.5.3 Fill Pipe...17 7. Monthly UST System Inspection Checklist 7.1 General...18 7.2 Purpose...18 7.3 Preparation...18 7.4 Review of Daily Inspections...19 7.5 Leak-Detection Recordkeeping...19 7.5.1 Automatic Tank Gauge (ATG)...19 7.5.2 Continuous Interstitial Monitoring (CIM)...19 7.5.3 Monthly Piping Leak Test (MPLT)...20 7.5.4 Statistical Inventory Reconciliation (SIR)...20 7.5.5 Inventory Control (IC)...21 7.5.6 Manual Groundwater Monitoring (GWM) or Soil-Vapor Monitoring (SVM)...21 7.5.7 Manual Interstitial Monitoring for Tanks (MIMT)...21 7.5.8 Manual Interstitial Monitoring for Piping (MIMP)...22 7.6 All Tanks...23 7.6.1 Grade-Level Covers...23 7.6.2 Spill-Containment Manhole Drain Valve...23 7.6.3 Drop Tube...23 7.6.4 Tank Gauge Stick...23 7.6.5 Check for Water...23 7.6.6 Tank Vents...25 7.7 Stage I Vapor Recovery...25 7.7.1 Two-Point (Dual-Point) Vapor Recovery...25 7.8 Observation and Monitoring Wells...26 7.8.1 Identification of Observation and Monitoring Wells...26 7.9 Corrosion Protection...27 7.9.1 Impressed-Current Cathodic Protection...27 8. Annual UST System Inspection Checklist 8.1 General...27 8.2 Purpose...27 8.3 Preparation...27 8.4 Verification and Review of Monthly Inspections...28 8.5 Submersible Turbine Pumps (STPs)...28 8.5.1 All Submersible Turbine Pumps (STPs)...28 8.5.2 Submersible Turbine Pumps Without Containment Sumps...29 8.5.3 Submersible Turbine Pumps With Containment Sumps...29 8.6 Other Tank-Top Sumps...32 8.7 Other Sumps...32 8.8 Automatic Tank Gauge (ATG) Manhole...32 8.9 Fill Area...32 8.10 Overfill Prevention...33 8.10.1 Drop Tube Shutoff...33 8.10.2 Ball-Float Valve...33 8.10.3 Overfill Alarm...33 8.11 Leak Detection...34 8.11.1 Automatic Tank Gauge (ATG) Console...34 8.11.2 Continuous Interstitial Monitoring...35 8.11.3 Electronic Leak-Detection Monitor...35 8.11.4 Line Tightness Testing...35 8.11.5 Under-Pump Check Valve for Suction Systems...36 vii
PEI Recommended Practices 900-08 8.11.6 Tank Tightness Testing...36 8.11.7 Continuous Soil-Vapor Monitoring...36 8.11.8 Continuous Groundwater Monitoring...36 8.12 Corrosion Protection...37 8.12.1 Galvanic Cathodic Protection (CP)...37 8.12.2 Impressed-Current Cathodic Protection (CP)...37 8.12.3 Internal Tank Lining...37 8.13 Miscellaneous Inspection Items...37 8.13.1 Condition of Tank Pad and Surrounding Pavement...37 8.13.2 Stage II Liquid-Collection Points...37 8.13.3 Stage II Vapor-Recovery Testing...38 8.13.4 Checking the Site Diagram...38 8.14 Initial Fuel Dispenser Inspection...38 8.14.1 Accessing Dispenser Components...38 8.15 Fuel Dispenser Inspection...39 8.15.1 All Fuel Dispensers...39 8.15.2 Fuel Dispensers Without Containment Sumps...39 8.15.3 Fuel Dispensers With Containment Sumps...39 8.15.4 Piping Interstitial Space...40 8.15.5 Dispenser Sump Sensors...40 APPENDICES Appendix A: Checklists Appendix A-1: Daily UST System Inspection Checklist...42 Appendix A-2: Monthly UST System Inspection Checklist...43 Appendix A-3: Annual UST System Inspection Checklist...45 Appendix A-4: Sample Site Diagram Form...50 Appendix B: Storage System Inspection Summary Table...51 Appendix C: Publication Reference...52 viii