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1P .�
<br /> S E C 0 R
<br /> (TNP@5-15) TPHg,TPH-O, toluene, ethyIb enzene, and total xylenes were not detected above
<br /> orings THP-1
<br /> laboratory detection limits Laboratory analysis of groundwater YHP2s from
<br /> o�,TPHd t 84Q ppb 900 pp {
<br /> THP-2 detected maximum concentrations of TPHg at 6, 1 b THP2W-21) TPH-O,
<br /> (THP2W-21), benzene at 1,900 ppb (THP2W-21) and total xylenes at 77 pp (Compounds HVOC's)were not
<br /> benzene toluene, ethylbenzene, and Halogenated Volatile Organic
<br /> detected above laboratory detection limits (EMCON, 1994)
<br /> On December 10 through 22, 1998, Gettler-Ryan Incorporated (GR)supervised the removalensers, and associated product
<br /> of two
<br /> 10,000 gallon and one 8,Doanalysis
<br /> 0 lnof asamples colleed UST, cted from the UST excavation detected
<br /> dispenser piping Laboratory benzene at 0 27 ppm (3W), and Methyl-tert Butyl
<br /> maximum concentrations of TPHg at 31 ppm (3W), the
<br /> Ether(MtBE)at 80 ppm (3E) Laboratory analysis of sod samples collected from the beneath and
<br /> dispensers and product piping detected maximum
<br /> concentrations
<br /> e genions of water was emof TPHg at 1,600 ped(from the
<br /> MtBE at 1 8 ppm (D3) Additionally, pp
<br /> UST excavation during the installation of the new USTs Laboratory analysis of a grab grouSnOdOwlater
<br /> sample detected maximum concentrationsGroundwater Montor ng Well MWMtwaat
<br /> des oyed to allow the
<br /> and 120,000 p,g/L, respectively G 1999)
<br /> enlargement of the existing UST excavation to allow for the installation of nCamb a)conducted
<br /> Incorporated {
<br /> On October 7 and 8, 1999, Cambria Environmental
<br /> x borings (CB-1 through CB-6)for sal and
<br /> Cone Penetration Testing(CPT) by 9 �n Soil samples
<br /> groundwater sampling and two borings (CB-2E and CB-4E)for electric soil logging
<br /> were collected every five feet to t b seln 20 feet
<br /> using
<br /> hydropunch at depths of 16 and 29 feetapproximately
<br /> CB-1, and samples
<br /> B-4 through CB-6 Water
<br /> et in boring
<br /> analysis
<br /> d 29 fe
<br /> samples were collected at depths of 16 deter ed max m m con entrrattiions of gasoline ne range o5`
<br /> samples collected from the sod bong CB_3 13 5), MtBE at 27 mglkg (CB-3-13 ),
<br /> organics (GRO)at 27 milligrams per kilogram (mg/kg)6-3-13 5 BTEX was not detected above
<br /> and Tert amyl methyl ether (TAME)at 0 058 mg/kg ( )
<br /> laboratory detection limits Laboratory analysis of groundwater samples collected from the7,000 soil
<br /> borings detected maximum concentrations fMtBE,ne range organics at 38 000 µg1L (CB-G-16HP)RO)atBand TAME at 160
<br /> 16HP), benzene at 1,300 µg/L (CB-4 16 ),
<br /> µglL(CB-1-16HP) (Cambria, 1999)
<br /> On June 12 and 13, 2040, Cambria replaced destroyed Well MW-1 and damaged Well MW-2s. with
<br /> ely
<br /> Groundwater Monitoring Wells d staled two 2-inch W-1 R and diameterto s of 31 5 and wells (MW 9 a0feet nd MW-10)to a total
<br /> In depth
<br /> o 31 Cambria drilled
<br /> depth of 31 5 feet bgs Laboratory analysis of$od samples collected from the sod borlkg ings detected
<br /> maximum concentrations of TPHg at 0 82 mglkg(MW8-12')and MtBE nta ���of groundwater
<br /> BTEX was not detected above laboratory detection limits Laboratory y lL VW_1)
<br /> samples collected from all wells detecteD 000 im�L concentrations uAlcohol hol (TBA)TPHg at �at017,000{84 µg/L
<br /> benzene at 84 µg1L(VW-1), MtBE at 25 pg
<br /> /L,
<br /> (Cambria, 2000)
<br /> Groundwater monitoring and sampling was initiated in 1992 and are currently sampled quarterly
<br /> an interim
<br /> Depth to groundwater at the site was initiated to educe the amountet bgs pettroleumOhydrocarb ns and
<br /> migration control plan at the site
<br /> MtBE beneath the site, and to prevent further off-site migration of the dissected groundwater dwaterf from
<br /> consisted of the periodic extraction of approximatelan
<br /> ly 5,000 gallons of imp g oleum hydrocarbons and _
<br /> wells historically cntairnng the
<br /> highestconcentrationscontuedPOT
<br /> the fourth quarter w h aMtBE
<br /> 1 R, MW-2R, and VW-1) Remedial extractions
<br /> extraction 919,400 gallons to date
<br />
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