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AppendixA <br /> FIELD PROTOCOL <br /> 1 <br /> The static water level and floating product level, if present, in each well that contained water was <br /> measured with an ORS Interphase Probe Model No 1068018 or Solorust Water Level Indicator, these <br /> instruments are accurate to the nearest 0 01 foot These groundwater depths were subtracted from <br /> wellhead elevations, including corrections for product thickness, when necessary, for gradient <br /> evaluation by multiplying product thickness (PT) by a correction factor 0 8 and subtracting from the <br /> DTW(Adjusted DTW=DTW- [PT x 0 8]) <br /> ' Water samples collected for subjective evaluation were collected by gently lowering approximately half <br /> the length of a new disposable or Teflon®bailer past the air-water interface(if possible) and collecting <br /> a sample from near the surface of the water in the well The samples were checked for measurable <br /> floating hydrocarbon product All Teflon® bailers are triple washed with Alconox® and triple rinsed <br /> with distilled water prior to use <br /> ' Before water samples were collected from the groundwater Monitoring Wells, the wells were purged <br /> until stabilization of the temperature, pK and conductivity were obtained Approximately three well <br /> casing volumes were purged before those characteristics stabilized The quantity of water purged from <br /> each well was calculated as follows <br /> 1 well casing volume=pr2h(7 48) where <br /> r--radius of the well casing in feet <br /> h=column of water in the well in feet <br /> ' (depth to bottom-depth to water) <br /> 7 48=conversion constant from cubic feet to gallons <br /> Gallons of water purged/gallons in 1 well casing volume=well casing volumes removed <br /> ' After purging, each well was allowed to recharge to at least 80°/a of the initial water level Water <br /> samples were collected with a new disposable or Teflon®bailer, and carefully poured into 40-milliliter <br /> (ml) glass vials, which were filled so as to produce a positive meniscus Each vial was preserved with <br /> hydrochlonc acid, sealed with a cap containing a Teflon® septum, and subsequently examined for air <br /> bubbles to avoid headspace which would allow volatilization to occur The samples were promptly <br /> transported in iced storage in a thermally-insulated ice chest, accompanied by a Chain of Custody <br /> Record, to a California-certified laboratory <br /> 1997 2nd Quarter Motntonng Repot <br /> PL1W 194-2731REP0RTS1ND-QTRIAPPEND A DOC[&24/97] S H <br />