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f _ Janna .26;.2012
<br /> SM bhelotti's Auto Repair - 3 R ry -
<br /> Remediation Summa :. , t., k . .. 'r ''MNIZ
<br /> Y
<br /> Free Product: :No freeyprodlact was`'documented throughout the'life of this'
<br /> case "`
<br /> • "Soil Excavation':,'.rApprokirriately,75a cubic yards bf.impacted.soil"were removed and "-
<br /> disposed offsite in 2003.fAn estimated 6791 pounds.of TPHg was removed by
<br /> Of excavations tw�� ;� r:' �. `. ; 1-', ETP 1 "� r; s.
<br /> In'Situ Soil Remediation'=No soil remediation`has been con ducted.T"-O
<br /> • Groundwater Remediation: 'Groundwater extraction, conducted from 2003 t}irough June
<br /> 2010 removed aypprpo/xE}matelysl 2,9�96,390a�g�4allons of coynfaminated,groeuvrn�d��w(�`atter �+,�My�jU,,
<br /> - *r-.M 4' y�•! f "'6~''}_..'f '�'''1lk i' 4" # �t� �✓-€ige'e 7f+ ie. l'1 �'.*.JJ O;,a T'!# ;,V;*iJ YM- S"+'��
<br /> General Site Conditions; t �'Z-64�;O pt�,;,
<br /> •F Geology and Hydrogeology: The Site is underlain by interbedded and intermixed sand;
<br /> silt and clay. The depth to groundwater isapproximate 10 feet bgs and the groundwater '
<br /> gradient is west$'r1y` F' r�4 cif'.1 � "L - w Y �h " iT � -A� Y . ,p#. ' .I �3� "f:E
<br /> • Estimate of Hydrocarbon Mass in Soil, Prior to remediation,Western Geo-Ene':":" s'
<br />- - - - r - estimated,that-app.roxim-ately,699,,'p6unds of,,TP-Hg remain-,in site sail
<br /> • ' .Groundwater Trends: There are more than 18 years of groundwater monitoring data fort
<br /> .,.,,this Site., Benzene trends,are shown below, source area (MW-10) and down gradient rt• - ,
<br /> �1 a �•I.. .r} ,s �.y„ ' wr trs�.h.M' rr r �.. ::w►t '7. -,.f >.i k' ,.V -i-.! '.1
<br /> {MVY��f"^3. ):''+ t q M
<br /> 'f fi' 'M, ,.a. _.1`f.i+• fi `.-�i , -._,.._. yuc�it! '�, �.17# .rt
<br /> BENZENE Results for MW10 # '
<br /> ,x* Wtt Eh�am,.• te,x'I 9�'Par,
<br /> LI
<br /> 2600
<br /> �! y. 2040
<br /> r
<br /> -
<br /> ` . ..
<br /> 3 , �,,,
<br /> 7500 1
<br /> 1000
<br /> 500,'
<br /> *'
<br /> — Trentl l
<br /> . �+•sesuA
<br /> BENZENE results for MW4 „ F u
<br /> t S -.^""'err �� �. y F` ■ " - _
<br /> 0.7 °; i fff
<br /> va.a - - --.- [
<br /> - BENZENE-��•.- Trend
<br /> Risk Evaluation
<br /> A soil vapor survey was conducted in March 2011 and all sarnples were found to be below
<br /> California Human Health Screening Level thresholds: There are no water,supply wells or
<br /> surface water receptors present within 2,000 feet of the Site: `
<br />
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