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4 <br /> January 16,2012 <br /> Cardno ERI 278913.Q114 Former Mobil Service Station 99CAS,Stockton,California <br /> ACRONYM LIST <br /> pg/L Micrograms per liter NEPA National Environmental Policy Act <br /> Ns Microsiemens NGVD National Geodetic Vertical Datum <br /> 1,2-DCA 1,2-dichloroethane NPDES National Pollutant Discharge Elimination System <br /> acfm Actual cubic feet per minute O&M Operations and Maintenance <br /> AS Air sparge ORP Oxidation-reduction potential <br /> bgs Below ground surface OSHA Occupational Safety and Health Administration <br /> BTEX Benzene,toluene,ethylbenzene,and total xylenes OVA Organic vapor analyzer <br /> CEQA California Environmental Quality Act P&ID Process& Instrumentation Diagram <br /> cfm Cubic feet per minute PAH Polycyclic aromatic hydrocarbon <br /> COC Chain of Custody PCB Polychlorinated biphenyl <br /> CPT Cone Penetration(Penetrometer)Test PCE Tetrachloroethene or perch loroethylene <br /> DIPE Di-isopropyl ether PID Photo-ionization detector <br /> DO Dissolved oxygen PLC Programmable logic control <br /> DOT Department of Transportation POTW Publicly owned treatment works <br /> DPE Dual-phase extraction ppmv Parts per million by volume <br /> DTW Depth to water PQL Practical quantitation limit <br /> EDB 1,2-dibromoethane psi Pounds per square inch <br /> EPA Environmental Protection Agency PVC Polyvinyl chloride <br /> ESL Environmental screening level QA/QC Quality assurance/quality control <br /> ETBE Ethyl tertiary butyl ether RBSL Risk-based screening levels <br /> FID Flame-ionization detector RCRA Resource Conservation and Recovery Act <br /> fpm Feet per minute RL Reporting limit <br /> GAC Granular activated carbon scfm Standard cubic feet per minute <br /> gpd Gallons per day SSTL Site-specific target level <br /> gpm Gallons per minute STLC Soluble threshold limit concentration <br /> GWPTS Groundwater pump and treat system SVE Soil vapor extraction <br /> HVOC Halogenated volatile organic compound SVOC Semivolatile organic compound <br /> J Estimated value between MDL and PQL(RL) TAME Tertiary amyl methyl ether <br /> LEL Lower explosive limit TBA Tertiary butyl alcohol <br /> LPC Liquid-phase carbon TCE Trichloroethene <br /> LRP Liquid-ring pump TOC Top of well casing elevation;datum is msl <br /> LUFT Leaking underground fuel tank TOG Total oil and grease <br /> LUST Leaking underground storage tank TPHd Total petroleum hydrocarbons as diesel <br /> MCL Maximum contaminant level TPHg Total petroleum hydrocarbons as gasoline <br /> MDL Method detection limit TPHmo Total petroleum hydrocarbons as motor oil <br /> mg/kg Milligrams per kilogram TPHs Total petroleum hydrocarbons as stoddard solvent <br /> mg/L Milligrams per liter TRPH Total recoverable petroleum hydrocarbons <br /> mg/m' Milligrams per cubic meter UCL Upper confidence level <br /> MPE Multi-phase extraction USCS Unified Soil Classification System <br /> MRL Method reporting limit USGS United States Geologic Survey <br /> msl Mean sea level UST Underground storage tank <br /> MTBE Methyl tertiary butyl ether VCP Voluntary Cleanup Program <br /> MTCA Model Toxics Control Act VOC Volatile organic compound <br /> NAI Natural attenuation indicators VPC Vapor-phase carbon <br /> NAPL Non-aqueous phase liquid <br />