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<br /> '..03..October 200Q`l-
<br /> `Project No.;95-0114 X rr,, +• ,' ,v m { ,! s r{ n
<br /> age 2 of
<br /> ,.�, i 'e, ., - - •` i � t ti. I" r rttt "i e�,: `FI i. i 3 'il.;
<br /> ' _ EPA approved-VOA.vials containing 0:5 mI of hydroc_hloric acid (18%0) as a sample preservative,.
<br /> and were labeled: The samples were.transported in a chilled container under+chain=of custody to
<br /> t _
<br /> {4- McCampbell-Analytical Inc. (MCAT)'a.State of'Califomia Department of Health Services (DHS),: K
<br /> certified'lab"oratory(#1644): Samples•r ere analyzed in.accordance with
<br /> piTS
<br /> j 7
<br /> ' EPA Method 8015'M6difiedfor TPH ss '. •"�
<br />•' `: EPA Method 8020 for BTEX and
<br /> .EPA Method 8010'fbt-HVDCs.."
<br /> ' 3.0. FINDINGS '
<br /> Ground watei` flow direction and gradient. were calculated from-the.field=.data. The current ,
<br /> disti`ibution of dissolved ,petroleum hydrocarbons and dissolved chlorinated hydrocarbons were" ••
<br /> assessed from laboratory analytical results of the ground water samples..
<br /> .3:1. GROUND WATER GRADIENT AND,DIRECTION
<br /> ' The groundwater elevations were calcuIated.by subtracting-the measured depth to,ground water.frorrl:•
<br /> the surveyed casing elevations(Table 1). Groundwater elevations were plotted and'contoured on.
<br /> a scaled site map.
<br /> The average ground water elevation at the site increased approximately 2.56 feet between the January..
<br /> 2000 and June 2000 sampling events. Durin, 'h'e June 2000 ground water.monitoring,event, the,
<br /> ' depth'to'ground water at the site ranged.from 19;49'.to•20.55 feet below tops of the-well casings
<br /> Tlie'ground water;gradient and flow direction were variable across the'site .during~the June 2000;
<br /> monitoring event: Ground water,`flow direction varied from northeast to soutlieast the greatest'
<br /> 'gradienit was app roximately,`.0:01 generally toward southeast from well MW-1:
<br /> r ,
<br /> Ground water elevation data are summarized in Table 1. The relative ground water elevation for.the s'
<br /> ;,June 2000ground water monitoring event is,depicted.in Figure 3. °
<br /> ' Wells MWA and'MW-2 are screened between 34 and'54 feet bsg;'wells MW-3R, MW;4�and•MW 5 :• . n„
<br /> ` :are screened'between'.30 and,50 feet bsg; wells MW-6 and MW-`7 are screened between 25',and 45d
<br /> feet bsg Ground water.is more than 11 feet above the,tops of the screene'd�intervals'of wells MW1
<br /> ' and MW-2, 7 feet above theaops'of the screened intervals of wells MW=3R' 9
<br /> MW-4�and MW-5 and
<br /> Adwmed GihEnvironmental Inc LL
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