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<br /> ali ornia Regional Water lit ontrol Board ,
<br /> Central ValleyRegion
<br /> Robert Sclinelder,C11air.
<br /> Fresno Branch office ®ravewim
<br /> 1Vitr��nr�nit�a� InIrmct Aft..'ess: http://w,,vw.Fwrcl7.ci.gf)v/i-vrlr1)5
<br /> IJwreefinft 1685 F Stmet.,l7m,sno,CalirQmia 95706.2020
<br /> Phenr,(559)445.5116•FAX(159)44.5-591,0
<br /> 9 September 2003
<br /> Y_
<br /> 1 C. P
<br /> Mr. K Scott Man s ai ol.t
<br /> Chevron.Texaco
<br /> Chevron,Envi.rot).m.etl,ta.l Ma.na.gern.ent Coa.n.pa.n.y
<br /> P.O. Box. 6012
<br /> San Ramon, California 94583-2324
<br /> WORKPLAN RENTEw®WEST BYRON ROA 0 CORRIDOR,TRACY,SAN J AUIN COUNTY
<br /> We b;klye reviewed,tli.e Tracy Byron Road Soil and Groundwa er Investig�Won W rkplan �'e�st�yr�►n Road
<br /> Corridor, Tracy, CA submitted,by Science Appl.i.cati.ons Jntemation.al. Corporation (SATC) on behalf of
<br /> Chevron.Texa:co, The workplan encom.pa.sses a 7,000-foot parcel centered along Byron Road, which is lined.
<br /> on)loth.sides by private residences, small cornmerci.al businesses, and agricultural land.
<br /> unin.g the 2003 installation.of th.e City of Tracy stormwater drain.pipeline ben.ea.th Byron, Road., petrol.eurn
<br /> h.ydro6rbon-impacted soil, and groundwater was en.c+ou.n.tered. Consequently, Regional.Board staff requested
<br /> that Chevron,Texaco prepare a workplan-to characterize the extent of soil and,grou.rl,d.water, im.pacts.
<br /> Previ,oiis investigations for Cin,tra.,Dividend,Dobler.,McCormack,Mansfield/Fi.li.os,Mon.terosso, Ni.ckol.a.w,
<br /> Souza,a,n,d.Surl.a.n.d.Homes generally cover much of the area described in the workplan. ubsequen.tly, the San
<br /> Joaquift County En,vironinen.tal Health Department and/or, the Cen.tra.l. Valley Regional water. Quality Control
<br /> Board), No Further Action letters for. tbe,referenced.properties, except for Su.rlan.d Homes, Quafterly
<br /> grota.ndw,at:er monitoring is currently being conducted on the Sudand Horn.es property'
<br /> Based.on review of our records and th.e workplan.,flie previous invesfiRations have not adequately
<br /> eboracteri.zed soil and groundwater con.di.tions, for parcels within th.e easement on the north. side of the Souza
<br /> and McCormack properties, and the area west of l:nfe..rsta.te 205,within the easement along the southside of
<br /> Byron Road..
<br /> Pba.se l of the workplan proposes 33 borings to collect soil. and groundwater samples from those areas not
<br /> adequately cb.aracterized along 13yron.Road,.
<br /> 'We b.a,ve the following comments to 5A1C's workplan:
<br /> L we concur wid.).th,e consultants proposal.to advance additional borings nortai,of the McCorm,ack
<br /> proper.�l.y within the Byron Road easement to collect soil. anal,groundwater samples for analysis. Trt
<br /> addition, we recommend that groundwater, samples be collected from.approximately seven of the
<br /> proposed borings, not containing free phase product(one,sample each. 300 linear feet). Analysis of
<br /> California,Environmental.Proteef'on Agency
<br /> Of Re cycled Pape-r
<br /> °11"1ic Jnr y challenge faciniz California',-,wrat. 13vcry Cnlifomlati nmds to taitc immedia acti,7n tQ mdiwe energy consumption.
<br /> For a list of sirnxple ways yom can refitice demand and cut your cncrgy wring,sco our wet}-Fite At.lattt�:/Itiawl�r.rwr�b,��.�+�vlrw��b5
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