|
_737—
<br /> �. ,
<br /> _ F
<br /> $"
<br /> .a
<br /> �. " •TaiL .1
<br /> -CHECKLIST,
<br /> OF REQUIRED DATA .. .
<br /> �.
<br /> FOR-NO FURTHERACTION REQUETS AT 1::fNDERGR UND TAW ITES �R
<br /> ,
<br /> Alk
<br /> :d :.
<br /> S q Vim.
<br /> A Taichert&Coin an iO3 N.l�Street,°Stockion, an;Ioa urn Cour (RB#1 90589} G
<br /> Site Name and 6,i at,on:; p �'' _ .fr
<br /> .
<br /> 1. pistance to production wells for municipal,domestic A ?998 sensitive.receptor survey stated one water supply.
<br /> Y well rs located 1,200 northeast of the site ,
<br /> agriculture industry and other usr~s W,thin 2Q00 feet of the site 198fi and 2C+00 vivo 5 000 gallon and two 20,000
<br /> 2. Site ma s,`to scale, of area impacted showing locations of —Between r
<br /> P
<br /> `r Y. zany former and existing tank systems'excavation contours acrd gallon diesel;one 12,000-gallon', ane ! 000-gan'a n and
<br /> € " sample tocxhons, burin snit rnonrtoting well elevation one 550-gallon gasol,ne;�arrd one 1,000-gaflan and;one
<br /> - �. : g
<br /> 'contours'.gradrents, and nearby surface waters buildings, Z,�O,gellon waste oil USTs weremovedtotal of 1a
<br /> m
<br /> sheets and subsuiface utilities - & USTs
<br /> _ Site lithology consists of clay,.silt,and sand to 120',the
<br /> cross section ,
<br /> treatment system
<br /> Y` 3. Figures depicting' ( :total depth,invest►gat d,°' .
<br /> diagrams11; Y
<br /> ' " Approximately 2400 cubic yards of�soil was treated
<br /> Y 4..Stockpiled;soil remaining an-site or of site dispo {quantity) onsite and at a Tetcbert facilit3r In Trecy,'and reused
<br /> Seven monitoring wells(MIAf-1, MW-13 through A?Illl--)S), one soil vapor ,
<br /> Y 5. Monitonng:wel)s remaining on site, fateN and uric airsparge AS-i will be ro errl abandoned -
<br /> Depth"to groundwater varied'from 36'to 80'bgs. Groundwater flow
<br /> - 6.Tabulated results of alt groundwater direction varied from northeast to southeast"Groundwater grad+ent
<br /> p g a
<br /> -- elevations and depths to water tabularized"m various reports,'rncludinlosure rep
<br /> 7. Tabulated results of all sampling All data°ade du d from 000'1 to 0 007 ft/ft ort
<br /> 1 P
<br /> -- � �. gam`
<br /> and analyses.',
<br /> -,a
<br /> Y� petectionlimitsforconfrrmat,nn _
<br /> r
<br /> -s 'ice
<br /> t_ sampling ft'
<br /> - 4
<br /> --. 44 �
<br /> Y Lead analyses rnsoi!and ,The.extent of
<br /> .,� the
<br /> x identified -
<br /> 8. Concentrat►on cohtours of contaminants found and those remaining corrtarrrrna on
<br /> groundwater. grid both on-site and off site: " drown►n applicable
<br /> g reports'
<br /> ti
<br /> 0"Zatarat and rd Vertical extent of sur!eontamrnafron
<br /> .. - :r
<br /> a
<br /> 9. Zone o and _ ' Vertical exter►t of rorndwater contamination
<br /> teral
<br /> f influence calculated and assumptions used for subsurface emediation Over excavation;air sparging,soil vapor
<br /> system and the zone of capture attained for thr soil and groundwater remediation extraction;and bioventing wera the''-
<br /> a roved remediation
<br /> W.
<br /> 10.Reports./inforrr�at,on Unauthorized Release FormglvlRs Approximately 75 from 4/86 to 40©9
<br /> i - FR ether SCM$d,.SIR(4106) '
<br /> r
<br /> z �Y ;O
<br /> A
<br /> . ~•- den GM sur
<br /> d &Env, as to a
<br /> Request
<br /> -- UST:removal,over-excavatior,.ex-situ soil treatment,
<br /> # Y. <11:Best Avail able,Technology(8AT)used or ah explanation for not -- . ... . 1
<br /> ,SYFJAS/bioventing and natural attenuation
<br /> usin BAT
<br /> I Y f 2: Reasons why background"wes/is .... � Minor residua!soil and groundwater contamination remains on-site.
<br /> ttainabl a_using BAT,
<br /> ... y
<br /> Y `13.Mass balance calculation of substance treated: !The consultant estimates approximately 13,400 lbs-of TPI were
<br /> remove bysorl remediatian,'and 50lbs of TPHg retrains in
<br /> versus that remaining _ �� , _ - _.-
<br /> 14: Assumptions, parameters calculatio. rouidwater p ND at shutdown,one 9999
<br /> le re orted rtiaximum:TPHg;_9.4 mg/kg at 48.:tags.The remaining
<br /> p ns and The.SVE sail vapor sam le"rbsults were
<br /> snit
<br /> Y,. model used in risk assess
<br /> site
<br /> and same p__
<br /> trans oil modeling; site structure is abaridone&,The ccihsultant estimated time for' _
<br /> p 9 roundwate uto iiendwach WQGsm:-rPt4g,_5 ears and 1,2-DCA,13 eats
<br /> 15. Rationale why conditions remainrn at site Soil and groundwater contamination reportedly are limited in extent
<br /> y g
<br /> T. will not adverse! impact water qualify,'health,or Land use(commercia`I}►s not expected to change In the fareseea e
<br /> y 'future, .* = :
<br /> t, other beneficial uses;and
<br /> l $y; JL C Comments:setween.1986 and 2001);two 5,000-gallon and"two 20;000-gallon diesel; one 12,000-gallon,'one
<br /> 6i
<br /> 1,000-gallon,and,one 550-gallon gasoline;and one"1,000Lgalion and rile 2,000-gallon waste oil USTs were
<br /> Date: removed(total of"10 USTs}from the.subject srte2 Approximately 2400 cubic"yard.s"of soil was treated onsite
<br /> 11123F20d3 and ar a Telchert facility in Tracy,acrd reused Based upon approximately 75 uarters of groundwater ,
<br /> pp 9
<br /> k k tnariitaring showing a stable plume with declining concentrations, the limited extent of contamination
<br /> remaining
<br /> us"rs"area, soil andnal ground
<br /> st ff c no foreseeable changes!n land use an no soil vapor detected in the .:
<br /> - rerrlainin In sailWater"
<br /> ureal-with San Joaquin County's Closure RecommendatRegion
<br /> t
<br /> Arl
<br /> _
<br /> f - vt
<br /> fm
<br /> e
<br /> - . .
<br /> -
<br /> 3
<br />
|