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<br /> 06"
<br /> ,• , 07! tober2004 )
<br /> 4 t
<br /> ak9$NC^ProJectNo. 05040i,ilfIAGE
<br /> , IV
<br /> Pagre 2 of3
<br /> r+r,
<br /> ly'ilip1 yi' 87
<br /> transportation'under chain of custody to Cal Tech Environmental Laboratories(CTEL);a California i
<br /> ''Department of Health Services(DHS)-certified analytical laboratory
<br /> `in Paramount;California'. The.,. I l ,r:
<br /> samples were analyzed for
<br /> rf Total petroleum hydrocarbons quantified as gasoline (TPII-g) in accordance,:lWith`EPA
<br /> ! Method 801'5-Modified; and" 1 u
<br /> s.
<br /> Benzene toluene 6th lbenzene and total x`lenes` BTEX and fuel ox enates di frso ropy
<br /> ?;I ether(DIPE),ethyl tertiary-butyl ether(ETBE);methyl tertiary-butyl ethei�(MTBE);;tertlary
<br /> -amyl methyl ether. (TAME);_t-butyl alcohol (TBA), 1,2=dichloroetliane (1;2=DCA} and . If
<br />' 1,2-dibromoeth' (EDB) iri accordance with EPA_ Method 8260B.
<br /> 3.0. -FINDINGS
<br /> Ground water elevations; flow dizection, and gradient were determined'from field data collected ori
<br />'.' 28 May 2004.'Tlie contaminant impact,to ground water was uantified b the laboratory analytical
<br /> '
<br /> Y p �' q . Y rY Yt ,
<br /> data. -
<br /> '3.1., GROUND'WATER GRADIENT AND FLOW DIRECTION
<br /> At the time. of the May 2004 sampling event, depths-to:ground water at the site ranged from l
<br /> feet to 27.14 feet below the tops of the well casings.,Ground water elevations at'the-site ranged
<br /> from-17.68 feet'(MW-3),to.l$160'feet(MW-2)below-mean sea level(MSL):Ground water.elevationt,
<br /> r data is'in"cluded in Table 1.
<br /> i
<br /> Groundwater flow direction was calculated from the..'well elevation data. The,ground water was
<br /> Cpl,.. ' '.,., :inferred to flow to the southwest.at a gradient of approximately 0'.0.10 foot/foot. Figure-3_ illustrates '
<br /> the contoured ground water elevations as measured on 28 May 2004
<br /> 1 I - r fy Y i ` ` `t r,• I ,: IE I' t..
<br /> 141
<br /> 3.2. 'ANALYTICAL RESULTS OF GROUND WATER SAMPLES . .
<br /> [
<br /> .fl TPH-g wand.MTBE,were detected in the ground water sample collected from.well MW-1 at
<br /> " concentrations of 230 micrograms per liter (µg/1) each. `
<br /> f l No additional petroleum hydrocarbon compounds were detected iri the samples analyzed.An'alytical•' "
<br /> l I results from ground water samples are.summanzed in Table 2. The laboratory report(CTEL Project
<br /> (No.CT214-0406007);quality"assurance and quality control ( A/QC)report,"arid chain of custod
<br /> q Q P Y
<br /> Advanced GeoEnvironmental,Inc. :)
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