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GLOSSARY <br />Aquifers, aquitards, aquicludes and seals: <br />Aquifers yield useful or significant water. To not prejudice considerations of water use, <br />the term "water bearing interval" is preferred at MRP. <br />Seal is an oil field term, used at MRP for intervals between water bearing intervals, and <br />thus somewhere between aquitards and aquicludes; the R5 seal may be a true <br />aquiclude, and the R6 seal more an aquitard. <br />Decontamination Measures taken to clean sampling equipment between wells to prevent <br />cross contamination of samples. Need for decontamination depends on the amount of <br />flushing of the sampling equipment during purging, and the susceptibility of the <br />equipment to holding (absorbing) constituents to contribute carry-over. <br />Dissolution surface A surface cutting across the central basin saline beds, below which <br />nahcolite is intact, and above which it is dissolved away. <br />Field parameters Set of water sample parameters measured in the field with electronic meters, <br />typically T, SC, pH and ORP for ground water, adding DO in surface water. <br />HAS Health and Safety; also called HSE (Health, Safety and Environment) <br />HASP Health and Safety Plan <br />MDP Mahogany Demonstration Project: Now used as general location of earliest Shell tests <br />(MFE, MDP, MDP-S, DHT) in upper Spruce Gulch <br />MIT Mahogany Isolation Test: An operational area north of MDP, where a freeze wall was <br />tested with heaters <br />MRP Mahogany Research Project: Shell's general name for Colorado oil shale projects <br />ORP Oxidation - reduction potential by a silver electrode. Convertible to Eh (potential with <br />respect to a standard platinum electrode) by adding 230 mV (e.g. -230 mV ORP by YSI <br />meter is Eh 0 mV) <br />pH This is a scale of acid - alkali character, whose value is the negative log(lo) of molar <br />hydrogen ion activity, usually written H+ but more accurately H30+ - pH is a log of <br />concentration (M/M), i.e., with no unit, though it is often assigned "su" or "standard-units". <br />Potentiometric elevation The elevation at which fresh water will stand in a well at a particular <br />point, with reference to sea level. A.k.a. piezometric elevation. Head (reportable in units <br />of pressure or water column height) is how high water stands above the formation or <br />some other reference. Any of these may be adjusted to account for the density of water in <br />a well with saline water. <br />Pump cavitation (gas locking) A pump's vanes thrust water up the discharge pipe; but at the <br />inlet edge of the vane ("suction side") there is a low pressure zone. If the water has a <br />high gas content the gas may vaporize in the low pressure and form bubbles which grow <br />as they ascend the pipe and pressure decreases. If the bubbles are large enough the <br />vanes may spin in gas and lose propulsion, which is called "gas-locking". The most <br />obvious way to try to combat gas locking is to increase the pressure outside the pump <br />(the suction side), by lowering the pump in the well. Typical cavitation problems in pump <br />literature relate to the collapse of bubbles plucking at the containment (pitting corrosion), <br />but this is not the concern with a gas-locking pump, which cannot get rid of the gas as <br />fast as it is produced, and ceases to pump water. <br />EAST RDD ENVIRONMENTAL MONITORING, SAMPLING AND ANALYSIS PLAN <br />TOC-3