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There are 646 entries started with 'p'
P pa pc
po pp PU
P2 PAC PACKAGE PLANT
PACKED COLUMN PACKING PACKING FACTOR
PAG PAH PAHOCHOE
PAI PAINT PAINT POT
PAINT FILTER TEST PALEOCLIMATOLOGIST PALEOECOLOGY
PALEONTOLOGY PALEOSEISMOLOGY (Earthquake) PALISADE
P-ALKALINITY PALMER-BOWLUS FLUME PAM
PAMS PAN PAN COEFFICIENT (Hydrology)
PAN FORMATION PAPER PAPER PLANT
PAPER SLUDGE PAPER WASTE PARAFFIN
PARAFFIN OIL PARAFFIN WAX PARASITE
PARASITIC BACTERIA PARENT (Radiation) PARENT ISOTOPE (Radiation)
PARENT MATERIAL PARENT ROCK PARSHALL FLUME
PARTIAL CLOSURE (Waste Control) PARTIAL PRESSURE PARTIAL SAFETY FACTOR
PARTICLE PARTICLE ACCELERATION (Blasting) PARTICLE ARRANGEMENT
PARTICLE BONDS PARTICLE COUNTER PARTICLE DISPLACEMENT (Blasting)
PARTICLE DYNAMICS PARTICLE ENERGY FIELD PARTICLE ORIENTATION
PARTICLE SHAPE PARTICLE SIZE ANALYSIS PARTICLE VELOCITY (Blasting)
PARTICLE-ENERGY-FIELD THEORY PARTICULATE PARTICULATE MATTER (PM)
PARTICULATE ORGANIC CARBON (POC) PARTICULATE ORGANIC MATTER (POM) PARTICULATES
PARTICULATES, AIRBORNE PARTING PARTS PER MILLION (ppm) (Unit)
PASCAL (Pa) (Unit) PASCAL'S LAW PASCAL'S PRINCIPLE
PASFE PASS PASSIVATION
PASSIVE COEFFICIENT OF EARTH PRESSURE PASSIVE EARTH PRESSURE PASSIVE EQUILIBRIUM
PASSIVE RADON MEDIATION METHOD PASSIVE STATE OF PLASTIC EQUILIBRIUM PAST DISPOSAL SITE
PAST PRESSURE PATH OF PERCOLATION PATHOGEN
PATHOGENIC ORGANISM PATS PAVEMENT
PAVEMENT SUBSIDENCE PAVEMENT BLEEDING (Asphalt Pavement) PAVEMENT COMPONENTS
PAVEMENT PUMPING PAVEMENT RUT DEPTH PAVEMENT RUT DEPTH INDICATOR
PAVING Pb PCBs
PCE pCi (Unit) PCi/L (Unit)
PEA GRAVEL PEAK PEAK DISCHARGE
PEAK FLOW PEAK LOAD PEAKING FACTOR (Hydraulics)
PEAT PEAT BOG PEAT CLASSES
PEAT SOIL PEBBLE PED
PEDALFER PEDIMENT PEDOCAL
PEDOLOGY PEDOSPHERE PEELED (Foundation)
PEER PEGMATITE PEI
PEL PELLICULAR WATER PELLICULAR ZONE
PELTON WHEEL PEMS PENEPLAIN
PENETRATION RESISTANCE (Foundation) PENETRATION RESISTANCE CURVE PENETRATION TEST
PENETRATION, GROSS PENETRATION, MINIMUM PENETRATION, NET
PENETROMETER PENINSULA PENNSYLVANIA CRUDE OIL
PENTA PENTACHLOROPHENOL PENTAERYTHRITOL
PEPTIZATION PERC PERC TEST
PERCENT COMPACTION PERCENT CONSOLIDATION PERCENT SATURATION
PERCHED GROUNDWATER PERCHED SPRING PERCHED SUBSURFACE STREAM
PERCHED WATER TABLE PERCHLOROETHYLENE (PERC or PCE) PERCOLATING FILTER
PERCOLATING WATER PERCOLATION PERCOLATION PATH
PERCOLATION RATE PERCOLATION TEST PERCOLATION, CONFINED
PERENNIAL PERENNIAL INTERRUPTED STREAM PERENNIAL SPRING
PERENNIAL STREAM PERF PERFECTLY ELASTIC MATERIAL
PERFECTLY PLASTIC MATERIAL PERFORMANCE RATIO PERIGEAN TIDAL CURRENTS
PERIGEAN TIDE PERIGEAN TIDE RANGE PERIGEE
PERIOD PERIOD TABLE PERLITE
PERLITE, EXPANDED PERMAFROST PERMAFROST LINE
PERMAFROST, COLD PERMAFROST, WARM PERMANENT CURRENT
PERMANENT DISPLACEMENT PERMANENT HARDNESS PERMANENT MAGNET
PERMANENT SNOW LINE PERMANENT THRESHOLD SHIFT (PTS) PERMANENT WILTING COEFFICIENT
PERMANENTLY ABSORBED WATER PERMEABILITY PERMEAMETER
PERMEATE PERMEATOR PERMISSIBLE EXPOSURE LIMIT (PEL)
PERMISSIBLE VELOCITY PERMITTIVITY () (Geotextile) PEROXIDIZABLE CHEMICAL STRUCTURES
PEROXONE PEROXYACETYL NITRATE (PAN) PEROXYBENZOYL NITRATE (PBzN)
PERVAPORATION (PV) PESTICIDES PETRI DISH
PETROCHEMICALS PETROGRAPHY PETROLATUM
PETROLEUM PETROLEUM CONTAMINATED SOILS PETROLEUM JELLY
PETROLEUM SPILLS PETROLOGY PEZODIALYSIS
pF (Unit) PFBC PFC
PFCRA PFD PFRP
pH PHARMACEUTICAL-GRADE WATER PHARMACOKINETICS
PHASE PHASE ANGLE () (Material) PHASE DIAGRAM
PHASE I RCRA (Waste Control) PHASE II RCRA (Waste Control) PHASE VOLUME
PHD PHENOL PHENOL-FORMALDEHYDE RESIN
PHENOLPHTHALEIN PHENOLPHTHALEIN ALKALINITY PHENYL
PHOSGENE PHOSPHATE PHOSPHORIC ACID
PHOSPHORUS PHOSPHORYLATION PHOTIC ZONE
PHOTOCHEMICAL POLLUTANTS PHOTOCHEMICAL SMOG PHOTOCHEMISTRY
PHOTOELECTRIC EFFECT PHOTON PHOTOSYNTHESIS
PHOTOTROPHS PHOTOVOLTAIC CELL PHREATIC
PHREATIC CYCLE PHREATIC DECLINE PHREATIC DIVIDE
PHREATIC FLUCTUATION PHREATIC LINE PHREATIC SURFACE
PHREATIC WATER PHSA PHTHALIC ANHYDRIDE
PHYSICAL ADSORPTION PHYSICAL GEOLOGY PHYSICAL PERMEABILITY (k')
PHYSICAL TREATMENT PROCESSES PHYSICAL WEATHERING PHYSICAL-CHEMICAL TREATMENT
PHYSIOGRAPHIC BALANCE PHYSIOGRAPHIC DETERMINISM PHYSIOGRAPHIC PROVINCE
PHYSIOGRAPHY PI PICKETS
PICKLE LIQUOR PICKLING PICKLING ACIDS
pico PICOCURIE (pCi ) (Unit) PICs
PIEDMONT ALLUVIAL DEPOSIT PIER (Foundations) PIEZOELECTRIC
PIEZOMETER PIEZOMETRIC HEAD PIEZOMETRIC SURFACE
PIG PIGGING PIGMENT
PIGS PILE (Foundation) PILE (Waste)
PILE FOUNDATION PILE, BAMBOO-LIME COMPOSITE PILE, MINI
PILE, NEEDLE PILE, PIN PILE, ROOT
PILE, SAND PILE, TENSION PILING
PILOT PLANT PIN PIN FLOC
PIN PILE (Foundation) PINNACLE PIPE
PIPE GALLEY PIPING PIPING RATIO (Seepage)
PITCH PITCH OIL PITCHBLENDE
PITCHED ISLAND PITOT TUBE PITTING
PL PL 89-272 PLACER DEPOSIT
PLAGIOCLASE PLAIN PLANOSOL SOILS
PLASMA PLASTER OF PARIS PLASTIC
PLASTIC (Soil Consistence) PLASTIC CONSTRAINT PLASTIC DEFORMATION
PLASTIC EQUILIBRIUM PLASTIC EQUILIBRIUM, ACTIVE PLASTIC EQUILIBRIUM, PASSIVE
PLASTIC FLOW (Material) PLASTIC LIMIT (PL, ωp) PLASTIC MODELS (Soil Plasticity)
PLASTIC RANGE PLASTIC SOIL PLASTIC STATE
PLASTICITY PLASTICITY ANGLE (Θp) PLASTICITY CHART
PLASTICITY INDEX (PI, Ip) PLASTICIZERS PLASTICS
PLATE COUNT PLATE LOADING TEST PLATE SETTLER
PLATE TECTONICS PLATE-AND-FRAME PRESS PLATEAU
PLATEAU BASALT PLATEAU, KARST PLATE-LIKE SOIL STRUCTURE
PLATE-OUT (Radiation) PLATY SOIL STRUCTURE PLAYA
PLAYA DEPOSIT PLAYA LAKE PLIRRA
PLUG PLUG FLOW PLUGGING FACTOR
PLUME PLUTONIUM-239 PLUVIAL INDEX
PLUVIAL LAKE PLUVIAL PERIOD PLUVIOGRAPH
PLUVIOMETRIC COEFFICIENT (Hydrology) PM10 PM15
PM2.5 PMR PMT (Geotechnology)
PNA PNEUMATIC PIEZOMETER PNEUMATICS
POC POCs PODZOL
PODZOL SOIL PODZOLIC SOILS PODZOLIZATION
POH (pOH) POHC POINT BAR
POINT RAINFALL POINT SOURCE DISCHARGE POINT SOURCES
POINT SURFACE LOAD POINT-OF-ENTRY (POE) (Waste Control) POINT-OF-USE (POU) (Waste Control)
POISE (P) (Unit) POISON GASES POISSON'S RATIO (μ)
POLAR MOLECULE POLARIZATION POLISHING PONDS (Waste Control)
POLLUTANT POLLUTED WATER POLLUTION
POLLUTION SENSITIVITY INDEX (PSI) (Material) POLLUTION STANDARDS INDEX (PSI) (Air Quality) POLLUTIONAL INDEX
POLLUTIONAL LOAD POLONIUM POLREP
POLYCHAETE WORM POLYCHLORINATED BIPHENYLS (PCBs) POLYCYLIC AROMATIC HYDROCARBONS (PAHs)
POLYELECTROLYTE POLYESTER POLYETHYLENE
POLYETHYLENIMINE (PEI) POLYMALEIC ACID POLYMER
POLYMER-BOUND AGGREGATES (PBA) POLYMER-IMPREGNATED CONCRETE (PIC) POLYMERIZATION
POLYNUCLEAR AROMATIC HYDROCARBONS POLYNUCLEAR SPECIES POLYPHOSPHATES
POLYPROPYLENE POLYSTYRENE POLYURETHANE
POLYVINYL CHLORIDE (PVC) POM POND
PONDING PONDS (Waste Control) PONDS, FACULTATIVE
PONDS, OXIDATION PONDS, POLISHING POOL
POOLING POORLY DRAINED (Soil Drainage) POP
PORE FLUID PORE PRESSURE PORE PRESSURE PARAMETER A (Soil Testing)
PORE PRESSURE PARAMETER B (Soil Testing) PORE PRESSURE RATIO (ru) (Slope Stability) PORE WATER PRESSURE
POROSITY POROSITY, EFFECTIVE POROUS DISK DIFFUSER
POROUS STONE PORT PORTLAND CEMENT
POSITIVE CRANKCASE VENTILATION (PCV) POSITIVE DISPLACEMENT PUMP POSITRON
POSTCHLORINATION POSTTREATMENT POT HOLE
POTABLE WATER POTAMOGRAPHY POTAMOLOGY
POTASH POTASH MICA POTASH SILICATE
POTASSIUM POTASSIUM CARBONATE POTASSIUM CHLORATE
POTASSIUM CYANIDE POTASSIUM NITRATE POTASSIUM OXYMURIATE
POTASSIUM PERMANGANATE POTENTIAL ALPHA ACTIVITY POTENTIAL ALPHA ENERGY
POTENTIAL DIFFERENCE POTENTIAL DROP (Seepage) POTENTIAL ENERGY
POTENTIAL HEAD POTENTIALLY RESPONSIBLE PARTY (PRP) POTENTIOMETRIC SURFACE
POTW POU/POE POUND PER SQUARE INCH (psi) (Unit)
POUNDS PER SQUARE INCH, ABSOLUTE (psia) POUNDS PER SQUARE INCH, GAUGE (psig) POWDERED ACTIVATED CARBON (PAC)
POWER (P) (apparent) POWER (P) (true) POWER FACTOR RATIO
POZZOLAN POZZOLAN, NATURAL POZZOLAN, SYNTHETIC
ppb (Unit) ppm (Unit) ppmv (Unit)
PRAIRIE PRAIRIE SOIL PRECIPITABLE WATER
PRECIPITATE PRECIPITATION (Waste Control) PRECIPITATION (Weathering)
PRECIPITATION OSCILLATIONS PRECONSOLIDATION PRECONSOLIDATION PRESSURE (Pc)
PREFAILURE STAGE PREFIXED UNIT Prefixes, Exponential, Fraction and Percentages
PREMIXED POLYMER-CONCRETE (PCC) PRESENT SERVICEABILITY INDEX (PSI) (Pavement) PRESSATE
PRESSURE PRESSURE BULB PRESSURE CELL
PRESSURE ENERGY PRESSURE FILTER PRESSURE HEAD
PRESSURE INTENSITY PRESSURE POTENTIAL (Groundwater Hydrology) PRESSURE RIDGE
PRESSURE ZONE (Waste Control) PRESSURE, ATMOSPHERIC PRESSURE-DRIVEN FLOW (Radiation)
PRESSUREMETER (PMT) PRESSUREMETER-AASHO ROAD TEST TYPE PRESSUREMETER-MENARD TYPE
PRESSURE-RELIEF CONE (Groundwater Hydrology) PRESSURE-VOID RATIO CURVE PRESUMPTIVE PRESSURE
PRETREATMENT (Waste Control) PRI PRIMACY (Waste Control)
PRIMARY INTERSTICE PRIMARY AMBIENT AIR QUALITY STANDARDS PRIMARY AMINES
PRIMARY BOND PRIMARY CLARIFIER PRIMARY COMPRESSION
PRIMARY CONSOLIDATION PRIMARY CONTAMINANT PRIMARY MCL
PRIMARY PARTICULATE POLLUTANT PRIMARY POLLUTANT PRIMARY SEDIMENTATION
PRIMARY SLUDGE PRIMARY SOIL PRIMARY TIME EFFECT
PRIMARY TREATMENT (Waste Control) PRIMARY WAVE PRIMER
PRIMITIVE WATER PRINCIPAL ORGANIC HAZARDOUS CONSTITUENT (POHC) PRINCIPAL PLANE
PRINCIPAL STRESS PRINCIPAL STRESS RATIO PRINCIPLE OF UNCONFORMITY
PRIORITY OF USE OF WATER PRIORITY POLLUTANTS PRISMATIC SOIL STRUCTURE
PRIVATE USE OF WATER PRIVATE WATER PRIVATE WATER SUPPLY
PRIVATIZATION PRIVY PROBLEMATIC SOIL-ROCK
PROCAYOTIC ORGANISMS PROCESS WASTEWATER PROCESS WATER
PROCESSING (Waste Control) PROCESSING FACILITIES PROCTOR COMPACTION CURVE
PROCTOR COMPACTION THEORY PROCTOR NEEDLE PROCTOR PENETRATION CURVE
PROCTOR PENETRATION RESISTANCE PRODUCED WATER PRODUCERS
PRODUCT STAGING PRODUCT WATER PROFILE
PROGENY (Radioactivity) PROGLACIAL DEPOSIT PROGLACIAL LAKE
PROGRESSING CAVITY PUMP PROGRESSIVE FAILURE PROGRESSIVE RUPTURE
PROGRESSIVE WAVE PROMONTORY PROPENOL
PROPHYLAXIS PROPIONITRILE PROPORTIONAL LIMIT
PROTECTIVE FILTER PROTEIN PLASTICS PROTISTA
PROTIUM (H) PROTON PROTON DIFFUSION
PROTON EXCHANGE PROTON MASS (mp) PROTON MIGRATION
PROTOTYPE PROTOZOA PRUSSIC ACID
PS PSD PSDs
PSEUDO-HARDNESS PSEUDOMONAS PSI
PSI (psi) (Unit) PSIA (psia) (Unit) PSIG (psig) (Unit)
PSRP PSYCHODA FLIES PSYCHROMETER
PSYCHROPHILES PUBLIC HEALTH SERVICE ACT PUBLIC HEARING MEETING (Waste Control)
PUBLIC OWNED TREATMENT WORKS (POTW) PUBLIC USE OF WATER PUBLIC WATER
PUBLIC WATER SUPPLY PUBLIC WATER SYSTEM PUC
PUDDLED CORE PUDDLED SOIL PUDDLING
PUG MILL PULSATION DAMPENER PUMICE
PUMP PUMP PIT PUMP WELL
PUMPING HEAD PUMPING LEVEL PUMPING LINE
PUMPING OF PAVEMENT PUMPING WELL PUNCHING FAILURE
PURE SOIL PURPA PURPLE SALT
PUTNAM SOIL PUTREFACTION PUTRESCIBLE
PUTTY PV PVC
PVD P-WAVE (Earthquake) PYCNOMETER
PYREX PYRHELIOMETER PYRITE
PYROCLASTIC ACTIVITY PYROCLASTIC ROCK PYROCLASTIC TEXTURE
PYROCLSTIC MATERIAL PYROGEN PYROLYSIS
PYROPHYLLITE




ENVIRONMENTAL GEOTECHNOLOGY DICTIONARY
Edited By
Hsai-Yang Fang, Ph.D
Professor Emeritus
Lehigh University. Bethlehem, PA
Distinguished Fellow
Global Institute for Energy & Environmental Systems
The University of North Carolina at Charlotte, Charlotte, NC

Copyright Reserved 2006

Environmental geotechnology is a relatively new and interdisciplinary subject, which covers soil, water and rock and their interaction with various environmental cycles including the atmosphere, biosphere, hydrosphere, lithosphere, as well as geomicrobiosphere. To tackle this complex subject, it is necessary to have knowledge from other disciplinary fields including agricultural science, biology, environmental science, geology, microbiology, mineralogy, and physicochemistry. Therefore, a uniform glossary of terms, definitions, nomenclature, abbreviation, acronym, symbols and units is needed for general discussions, reports and documents to minimize confusion and to improve the effectiveness for the environmental aspects of geotechnical problems. Some important information is collected, compiled and edited, and in spite of careful preparation of this dictionary, there cannot be avoided some missing or misinterpreted terms, typing errors, etc. The editor hopes, however, that with the aid of suggestions and criticism, there can be improvement for a later edition.
Thanks to many government agencies, professional societies and private organizations including American Society of Civil Engineers (ASCE), American Society for Testing and Materials (ASTM), Transportation Research Board (TRB), International Society of Environmental Geotechnology (ISEG), U.S. Environmental Protection Agency (EPA), U.S. Department of Energy (DOE) for providing useful documents for preparation of the dictionary. Also thanks to Prof. Charles Ochola, Villanova University, Prof. Tae-Hyung Kim, Korea Maritime University, Ms. Eleanor S. Nothelfer of Fritz Engineering Laboratory, Lehigh University and Mr. Gustavo Borel Menezes of Global Institute for Energy and Environmental Systems (GIEES), University of North Carolina at Charlotte for their assistance during various phases of preparation of the manuscript.
Acknowledgment is made to Review Committee Members for their time and willingness to review the manuscripts.

Prof. Ronald C. Chaney, Humboldt State University, Arcata, CA
Prof. John L. Daniels, The University of North Carolina at Charlotte, NC
Prof. Jeffrey C. Evans, Bucknell University, Lewisburg, PA
Prof. T. Cassia De Brito Galvao, Universidade Federal de Minas Gerais, BRAZIL
Prof. Hilary I. Inyang, The University of North Carolina at Charlotte, NC
Dr. Abidin Kaya, URS Corporation, Honolulu, HI
Prof. Jai-Young Lee, The University of Seoul, KOREA
Prof. Irene M.C. Lo, Hong Kong University of Science & Technology, Hong Kong
Prof. Horace K. Moo-Young Jr., Villanova University, PA
Dr. Jouko Saarela, Finnish Environmental Institute, FINLAND
Prof. Robert W. Sarsby, The University of Wolverhampton, U.K.
Prof. Leonardo Zeevaert, Universidad Nacional Automoma de Mexico, MEXICO
Prof. Thomas F. Zimmie, Rensselaer Polytechnic Institute, NY

Hsai-Yang Fang
February 15, 2006

Web Edition by:
Gustavo Borel Menezes, GIEES, UNC Charlotte
Simon Chung, GIEES, UNC Charlotte

Developed by: Gustavo Borel Menezes