ML21239A073
| ML21239A073 | |
| Person / Time | |
|---|---|
| Site: | 07000925 |
| Issue date: | 08/31/2007 |
| From: | Lux J Cimarron Corp |
| To: | Kenneth Kalman Document Control Desk, Office of Nuclear Material Safety and Safeguards |
| References | |
| Download: ML21239A073 (30) | |
Text
CIMARRON P.O.
CORPORATION BOX316 CRESCENT, e OK73028 August 31,2007 Mr.Kenneth Kalman OfficeofNuclear Materials Safety & Safeguards U.S.Nuclear Regulatory Commission Washington, D.C.20555 Re: Docket No.70-925; License No. SNM-928 Closure onSeveral Issues
Dear Mr.Kalman:
Cimarron Corporation (Cimarron) submits this request toobtain closure onseveral items associated with groundwater remediation andmonitoring which are NOTrelated toongoing groundwater decommissioning Obtaining closure on these items willenable NRCand Tronox todemonstrate thatseveral aspects ofthe decommissioning project have been completed, and Tronox willthen beable tofocus itsresources onthe final remaining aspect ofdecommissioning.
Noneofthe issuesaddressed herein arerelated tothe decommissioning ofuranium-impacted groundwaterregarding which Cimarron isengaged intechnical discussions with NRC.
D a LicenseCondition 27(b) stipulates6.7 Bq/1 (180 pCi/l) totaluranium as the groundwater release criterion foruranium atthe Cimarron site. Italso specifies thefollowingmeans ofdemonstrating compliancewith thislimit:
".NRCwill notterminate Radioactive Materials License SNM-928 untilCimarron demonstrates that the totaluranium concentrations inall wells have been belowthe groundwater release criteriafor eight consecutive quarterly samples (thepast 2years).
Sincethislicensecondition wasissued, Cimarron has installednumerous groundwater monitoringwells toidentify areas ofgroundwater impact and tocharacterize the hydrogeology andgeochemistry ofimpacted areas Itisourunderstanding that itwasnever NRC's intent that Cimarron sample every well onthe sitefor eight consecutive quarters todemonstrate compliance withtherelease criterion. Rather, NRCintended thateach well used todemonstrate compliance l mustyieldgroundwater below the limit-i.e., Cimarron willnotemploy "averaging" for groundwater IntheWell 1319 Area (the area occupied bythe former uranium Cimarron facility), has demonstratedthat totaluranium concentrations arewell below the groundwater release criterion for morethan eight consecutive quarters. Cimarron requests that NRCprovide closure inthis areabyreleasing Cimarron from further monitoring inthis area and approving the abandomnent ofmonitoringwells inthe plant area.
CimarronCorporation Page 1of2 August2007
Assessment ofGroundwaterfor Tc-99 Ina letter datedMarch 13, 1997, NRCestablished acriterion of3,790 pCi/1for Technetium 99in groundwater. Cimarron conducted extensive groundwater assessment andmonitoring, and has demonstrated thatgroundwater is below this satisfying limit, the "eightquarters" criterionstated inLicenseCondition 27(b), asdiscussed above. Consequently,requests Cimarron thatNRC provide closure by releasing Cimarron from continued monitoring for Tc-99 and approving the abandonment ofmonitoring wells installed for theassessment ofTc-99 ingroundwater.
EW Theexisting environmental monitoring program, Section 15of (RPP), is neither necessary for assessment purposes, noris itappropriate forgroundwater decommissioning. This program, in which numerouswells are sampled onanannual basis, requires the expenditure ofeffortand expense with nobenefit toeither Cimarron orNRC.
Cimarron believes iti s authorized to eliminate thee nvironmental monitoring program in accordance with licenseCondition 27(e). However, NRChas expressed concern that monitoring mustcontinue inareas requiring remediation.
Consequently, Cimarron requests NRCapprovalto remove from theenvironmental monitoring program only those sampling locations notassociated with areasstill requiring remediation.
Sampling inareas requiring remediation will continuein accordance with the environmental monitoring program until anNRC-approved amendmentto the site decommissioning plan replaces the environmental monitoring program with adecommissioning (and post-decommissioning) monitoring program for theseareas.
Well Abandonment Over the past three decades, Cimarron has installed manygroundwatermonitoring wells atthe Cimarron site for numerous purposes. Site-wide groundwater assessment has identified several areas which mayhave inthe past exceeded groundwater release andthree areas which criteria, require still remediation. Numerous wells are installed inareas inwhich there has never been anyevidence ofgroundwater impact. Cimarron requests NRCapproval toabandonwells not associated with areas stillrequiring remediation. tothis letterprovides amorethorough description ofthe work performed, presents supporting data, andlistsspecifically the monitoring wells described above. Ifyouhave any questions regarding thislicense amendment request, pleasecall me at405-775-5194 (OKC) or 405-642-5152 (mobile).
Sincerely, 6 '
JeffLux Project Manager Cc: Blair Spitzberg, NRCRegion IV David Cates, DEQ Mike Broderick, DEQ Cimarron Corporation Page2of2 August 2007
ATTACHMENT 1 INFORMATIONSUPPORTING CLOSURE ONFOURGROUNDWATER MONITORING ISSUES
l I
TABLEOFCONTENTS 1.0 Executive Summary ,.,............... .,,..........,,.,...
,=......3 2.0 Facility Operating History.......................,............................................4 2.1 License Number/Status .............................................................................4 2.2 License History ,.............,......,......,,.....................,,.4 2.3 Previous Decommissioning Activities......................................5 2.4 Spills........................................................,................................................6 2.5 Prior On-Site Burials...................,...................................6 3.0 Facility Description........................................................8 4.0 Radiological Status ofFacility ...................................................................9 4.1 Structures, Equipment,Soil, andSurfaceWater ......................,........9 4.2 Ground Water...,...................................................9 5.0 Environmental Monitoring for Groundwater....................................................11 5.1.1Well 1319 Area................................,..................................,...........11 5.1.2 Uranium Pond#1Area...........=.=.........., .................12 5.1.3Uranium Pond#2Area................................................,..................13 5.1.4Monitoring Wells inOther Areas...........,........,.................................13 5.1.5Surface Water Sampling Locations............,...............14
l LIST OFTABLES Table1.1 -
Subarea Status Table5.1Wells 1319B-1 and1319C-1 Total Uranium Data Table5.2 Uranium Pond #1and#2Area Technitium-99 Data LISTOF FIGURES Figure1.1 Cimarron SiteSubareas 4.1 Groundwater Figure -
Plume Areas Figure5.1 Graph ofWell 1319B-1 UraniumData 5.2 Graph Figure -
ofWell 1319C-1 UraniumData 5.3-Well Figure 1312 Tc-99 Data 5.4 Seep1208Tc-99 Figure -
Data Figure 5.5 Well 1336A Tc-99Data ;
i
1.0 Executive Summary Cimarron Corporation (Cimarron) ownsa former nuclear facility production fuel near Crescent,Oklahoma. The Cimarron site was closedin 1975,and isbeing decommissioned in accordance with an NRC-approved decommissioning plan under License SNM-928. The license nowaddresses ofthefacility, thedecommissioning which iscomplete forall environmental media exceptgroundwater. plans Cimarron to decommission the site forrelease for unrestricted use.NRCestablished criteria release of180pCi/I fortotal uranium and 3,790 pCi/I forTc-99ingroundwater.License Condition 27(b) established a protocol fordemonstrating compliance those with criteria.
Thissubmittal demonstrates, inaccordance withLicenseCondition 27(b),that groundwater inthree areas which criteria atonetime exceeded groundwater release no longer exceed those criteria.
2.0 Facility Operating History 2.1 License Number/Status l
TheCimarronfacility wasoperated asa nuclear fuel productionfacility under License SNM-928 it was closed in1975.Facility until decommissioning beganin1976; decommissioning continues inaccordance with a decommissioning plan approved by NRCin August 1999. The site is oneofthe formerSite Decommissioning Management Program (SDMP) sites referenced in10CFR70.38a(3)iii. Thedecommissioning and finalstatus survey ofbuildings and soils iscomplete. Groundwater exceeds license criteriainthree areas.Groundwater inthreeother areas formerly exceeded groundwater releasecriteria. Duetoeither natural attenuation ortheactive removal of impacted groundwater, groundwater inthesethree areas hasbeen remediated.
2.2 License History Thelicensing history ofthesite, fromissuance throughApril 1995, ispresented in Section 1ofW (ChaseEnvironmental Group, April 1995). The SDPwassupplemented by Repod(GER, ChaseEnvironmental Group, 1998). NRCapproved the SDP onAugust 23,1999.
TheSDPandGERpresented information indicating that naturalattenuation mayreduce theconcentration of licensed material in groundwater sufficientlythatactive groundwater remediation maynotbeneeded. TheGERstated that,should information indicatethat naturalattenuation maynotachieve this, additionalassessment and/or remediation maybeneeded. Additional assessment hasbeenperformed andtheSDP willbeamended toprovide for moreactive remediation inthethree areas inwhich groundwater continues toexceed license criteria.
FabricatjonFacility(Chase Environmental Group, 1994) dividedtheCimarron siteinto Subareas A throughO (Figure 1.1). These Subareas were grouped into three"Phases"
Phase ISubareas (A through E)weresurveyed asunimpacted areas. Thefinal status survey plan for PhaseISubareas was approved byNRCinMay1995.PhaseII Subareas (F through J)andPhaseIll Subareas (Kthrough O)weresurveyed as impacted areas. Finalstatus survey plans for Phase IIandPhase IIISubareas were approved inMarch 1997 andSeptember1998, respectively.
Cimarron submitted Final Status Survey reports for eachsubarea ofthesite from 1996 to2005.Table 1.1, taken from W (Nextep Environmental, Inc.,
2005) provides a listing ofthe dates offinal status survey plans and reports, status ofconfirmatorysurveys, andthedates ofrelease forthefifteen Subareas. NRCreleased all butthree subareas inLicense Conditions 25 and28 through 30.Remaining unreleased subareas will notbereleased until groundwater remediation iscomplete.
A license amendment request (LAR) containing an amendment to theSite Decommissioning Plan wassubmitted in2006. TheLAR was intended toprovide for thedecommissioning ofareas exceeding release criteriaand closure for areas already remediated. NRCnoted deficiencies inthegroundwater remediation proposal; these will beaddressed ina subsequent LAR. However, NRCdidnot respond tothose portions oftheLARthat would provide closure for areas which already comply with decommissioning criteria. Consequently, this document isbeing submitted separately from theDecommissioning Plan amendment tosecure closurefor those areas for which decommissioning iscomplete.
2.3 Previous Decommissioning Activities Previous decommissioning activities include thedecontamination andremoval/disposal ofall equipment used intheprocessing offeed material andthe production ofuranium fuel,aswell asthedecontamination oftheprocess buildings. A portion oftheuranium building hasbeendismantled andremoved from thesite. Allremaining buildings were released for unrestricted useinLicense Conditions 29and30.
Soil yielding greater than the30 pCi/g total uranium specified criterion inLicense Condition 27(c) wasexcavated. Soilexceeding 100pCi/g total uranium waspackaged andshipped toa licenseddisposal facility. Soil yieldingbetween 30and100pCi/g total uranium was buried inanonsite disposal cell inaccordance with License Condition 27(a). Decommissioning ofsoils iscomplete attheCimarron site. Final status survey reports weresubmitted forall areas ofthesite between 1996and2005.Three subareas havenotyetbeen released for unrestricted use: Subareas F,G,andN.The remaining subareas were released for unrestricted use inLicense Conditions 25,28,29, and30.
Groundwater which exceeds orrecently exceeded NRC-stipulated criteria wasidentified insix areas. inthree areas, naturalattenuation orextraction reduced the concentration ofradionuclides toless than theNRC-stipulated criteria.
2.4 Spills During operating years, a pipeline carried wastewater from lagoons totheCimarron River. During decommissioning activities, itwasdiscovered that thepipeline had historically leaked intoalluvial materials near thebluff overlooking the Cimarron River. ,
Thepipeline wasremoved, andsoil exceeding thecriteria specifiedinLicense Condition 17(c) was removed fordisposal. The trench was thenbackfilled. Site-Wide Groundwater Assessment Review (Kerr-McGee, 2005) identifies this area asan area in which groundwater remediation isrequired. Groundwater exceeding the totaluranium criterion of180pCi/I hasbeendelineated, andthehydrogeology andgeochemistryof thearea wasreported inCW (ENSR, 2006). Theamendment tothe SDPwill address the remediation ofgroundwater inthis area.
2.5 Prior OnSite Burials Licensed material wasburied intrenches inthree areas, historically referred toasBurial Grounds #1,#2,and#3.All material exceeding criteria forsoilsspecified inLicense Condition 27(c) wereremoved fromthetrenches during previous decommissioning activities. Groundwater impacted bylicensed material atconcentrations exceeding the
release criteria specified inLicense 27(b)
Condition hasbeenidentified downgradient fromtwo oftheseareas: Burial Ground
- 1andBurial Ground
- 3.
Site-WideGroundwater Assessment Review(Kerr-McGee,identified 2005) theareas in which groundwater remediation Groundwater isrequired. thetotal exceeding uranium criterion of180pCi/I has beendelineated,andthehydrogeology andgeochemistry of the areas were reported in W (ENSR, 2006).
l 3.0 Facility Description The Cimarron site islocated Oklahoma.
nearCrescent, Detailed information land concerning the facility, climate, andradiological use, characterization ofthe are site presented inthe SDP andtheGER, Detailed onthegeology information andsurface andground waterhydrology arepresented inW (ENSR, 2006).
4.0 Radiological Status ofFacility 4.1 Structures, Equipment, Soil, andSurface Water Cimarron hascompleted thedecommissioning ofall structures, equipment, andsoils.
NRChasperformed confirmatory surveys forall areas except Subarea F.All Subareas exceptSubareas F,G, and N havebeen released for unrestricted use.
4.2 Ground Water TheCimarron facility isunderlain bysandstone bedrock inthe southern two-thirds ofthe siteoralluvium inthenorthern third.The Cimarron River floodplaincontains alluvial material,andrepresents themostpermeable water-bearing zoneonsiteUpland areas areunderlain bythree sandstones ofrelativelylow permeability, which arereferred toas Sandstones A,B,andC,from highertolower elevation. These three sandstone layers areseparated bylow-permeability mudstones, whichfunction asaquitards, severely limiting groundwater flow between permeable zones. The hydrogeology ofthesite is described indetail in W (ENSR, 2006).
NRChasestablished release criteria of180pCi/I for totaluranium and 3,790 pCi/1 for Technitium-99 ingroundwater. Cimarron identifiedall potential sources of groundwater contamination andinstalled groundwater monitoring wells asneeded todetermine if licensed material had migrated fromanyofthesepotential sources, causing groundwater toexceed thecriteria. Inaddition, historical groundwater data was reviewed toidentify areas which mayhave exceeded the criteriainthepast.
Site-Wide Groundwater Assessment Review (Cimarron, 2005) describes this groundwater assessment anddivides thesite into four categories ofareas, termed "Phases" Phase Iareas arehydrologically isolated from former production ordisposal groundwater activities; inthese areas isunimpacted. Phase IIareas arepotentially impacted areas inwhich groundwater monitoring hasdemonstrated impact isbelow releasecriteria. PhaseIll areas areareas which havebeenimpacted above release butforwhich criteria, groundwater monitoring indicates impact no longer exceeds
release criteria. Phaselila areas areareas forwhich monitoring demonstrating compliance waslong agoobtained andisnolonger needed. Phase lilb areas areareas for which needed monitoring data ispresented inSection 5 ofthis document. Phase IV areas areareas inwhich groundwater monitoring indicates impact stillexceeds release criteria. PhaseIV areas requiregroundwater remediation, andarenotaddressed inthis license amendmentrequest.
S (Cimarron, 2005) identified six areas in which groundwater hasatsome time exceeded license criteria. Three ofthese areas were identified asPhase IIIbareas, and three were identified asPhase IVareas. Figure 4.1shows howthe hasbeendivided into thefour site "phase" categories, aswell asthe location ofthe threeareasaddressed inthis license amendment request.
Tc-99 atonetime exceeded the3,790 pCill criterion in groundwater intwoareas: theU-Pond#1andU-Pond #2 areas. Section 5,Environmental Monitoring andControl, describes themonitoring completed inthese areas, demonstrates that groundwater no longer exceeds applicable andproposes criteria, thatmonitoring beterminated for these areas.
Inthe Well 1319area, uranium exceeded the180pCill release criterion in groundwater inSandstones B andC. Cimarron extracted groundwater exceeding the release criterion, pumping theimpacted groundwater fromWells 1319B-1 and 1319C-1 Section 5,Environmental Monitoring andControl, describes the monitoring completed in this area, demonstrates that groundwater nolonger exceeds applicable criteria, and proposes that monitoring beterminated for this area.
5.0 Environmental Monitoring for Groundwater Asstated in Section 4.2, groundwater inthree areas formerlyexceeded release criteria, butdonotexceed releasecriteria anymore. Groundwater assessment data hadnot beencollected long enough prior to thesubmission ofSite-Wide Groundwater Assessment Review (Cimarron, 2005)toenable Cimarron todemonstrate compliance with release criteria.Those areas are:
- Well 1319 Area
- Uranium Pond#1Area
- Uranium Pond#2Area Thissection presents groundwater datacollected todemonstrate compliance with release (in criteria accordance withIlcensecondition 27(b)) for eachofthese three areas, andidentifiesmonitoring which wells will beabandoned, asthey arenolonger needed. also It addresses theabandonment ofother wellsin areas notassociatedwith areas requiringremediation orcontinued monitoring.
5.1.1 Well 1319 Area Groundwater exceeded release for criteria uranium inSandstone B andSandstone C in a small areasurrounding former Well1319. Groundwater exceeding release criteria was removed bypumping. Afterthepumpswereshutdown,Cimarron initiated quarterly sampling ofmonitor wells1319B-1 and1319C-1, theonly twowells that yielded groundwater exceeding releasecriteria.Table 5.1presents data obtained from these wells.Figures 5.1and5.2provide graphs ofthe data for eachwell, indicating whendata wascollected forassessment, remediation, andpost-remediation monitoring.
Decommissioning ofbuildings andsoilinSubarea K,thesubarea impactedbylicensed material ingroundwater around Well1319,hasbeencompleted. Cimarronbelieves this data demonstrates thattheonly mediaforwhich decommissioning wasstill required, groundwater, iscomplete. Inaddition, asstated inSite-Wide Groundwater Assessment
Review (Cimarron, 2005),thereisnoneed forfurther groundwater assessmentinanyof theSubareas formerlyoccupied bylicensed operations, which Subareas include I,K,L, andthesouthern portionofSubarea N.
UponDEQand NRC approval, Cimarron willplug andabandon groundwater monitoring wells located inthe Well 1319Area, aswell asother wells located intheabove-mentioned Subareas.Cimarron proposes toabandon thefollowing monitorwells:
1319A-1 1319B-1 1319C-1 1322 1323 1319A-2 1319B-2 1319C-2 1326 1327B 1319A-3 1319B-3 1319C-3 1328 1329 1319B-4 1319B-5 1330 Inaddition, several monitorwellswereinstalled inareas inclose toformer proximity lagoons during sitewide groundwaterassessment activities, from which nofurther data isneeded. UponDEQandNRCapproval, Cimarron will plugand abandon thefollowing monitor wells inthese areas:
1331 1332 1333 1334 1348 1349 1353 5.1.2 Uranium Pond#1Area Groundwater exceeded criteria release forTc-99 inonewell locateddowngradientfrom Uranium Pond#1 Well 1312.This isthe only well inthis area thathaseveryielded Tc-99 above therelease criterion.
Table 5.2presents Tc-99 data Well for 1312.Figure 5.3 provides a graph ofthesedata.
Active remediation wasnever required for thisarea; natural attenuationreduced theTc-99concentration inthis areatolessthan therelease criterion. UponDEQandNRC approval, Cimarron discontinue will monitoring inthis areaandwill plug andabandon thefollowing groundwater wells monitoring located inthe Uranium Pond #1area:
1311 1312 1313 1340 1341 1345 1354 1355 5.1.3 Uranium Pond#2Area Groundwater hasexceeded releasecriteria for Tc-99 atonelocation downgradient from Uranium Pond#2 labeled Seep 1208.
This istheonly location inthis area thathas recently yielded Tc-99 above the release criterion. Thehighest concentrations ofTc-99 ingroundwater inthis area were obtained from Well 1336A. Table 5.2 presentsTc-99 data for thesetwolocations. Figures 5.4 and 5.5 provide graphs ofthese data.
Activeremediation wasnever required for this area; natural attenuation reduced the Tc-99concentration inthis area toless than the release criterion.UponDEQandNRC approval,Cimarron will discontinue monitoringin this areaandwill plug andabandon the following groundwater monitoring wells located in the Uranium Pond #2area:
1336A 1337 1338 1346 1347 5.1.4 Monitoring Wells inOther Areas Numerous monitoring wells wereinstalled intheCimarron River floodplain toevaluate releases potential from Uranium Ponds #1and#2.These wells arenolonger needed.
UponDEQandNRCapproval, Cimarron willplug andabandon thefollowing monitor wells:
1320 1321 1324 1325 1335A l 1339 1342 1343 1344 T-51 T-52 T-53 T-54 T-55 T-56 T-57 T-58 T-59 T-60 T-61 T-63 T-69 T-80
5.1.5 Surface Locations Sampling Water Surface water samples werecollected locations fromthefollowing as part ofthe environmental monitoring UponDEQandNRCapproval, program. Cimarron will eliminate theenvironmental anddiscontinue program monitoring ofthe sampling following locations:
1201 1202 1204 1205 1206 1208 1209
TABLES TABLE1.1 CIMARRON CORPORATION CIMARRON FACILITY SUBAREA STATUS A -
E 690Released 1996 F 20FSSR 2005 Resonse toNRCComments 2006 NRCConfirmato Surve None Released G 20 FSSR 1999 Res onsetoNRCComments 2000 NRC Confirmato Surve 2001 Released H 40Released 2001 I 20Released 2001 J 7 Released 2000 K 5 Released 2002 L 5 Released 2001 M 3 Released 2001 N 12FSSR 2002 NRCComments None NRCConfirmato Surve 2002 Released O 7 Released 2000 Page 1of1
TABLE5.1 CIMARRON CORPORATION WELLS1319B1 AND1319C-1 TOTALURANIUMDATA 1319B1 1319C-1 at Date Uranium al Sample Uranium (pCill) (pCi/I)
Jun-03 200.5 232.2 Se -03 195.3 308.5 Dec-03 146.6 105.6 Dec-03 179.5 98.9 Mar-04 177.4 75.1 Mar-04 179.2 39.4 Ma -04 132.6 51.1 Jun-04 136.6 30.1 Au -04 132.7 29.2 Feb-05 99.6 19.4 Jun-05 109.3 19.7 Se -05 102.5 18.1 Dec-05 84.7 18.9 Feb-06 90.8 20.6 Ma -06 86.7 14.97 Se -06 64.5 15.5 Page1of1
TABLE5.2 CIMARRON CORPORATION URANIUM POND#1AND#2AREATECHNITlUM99 DATA Well 1312 Seep1208Well 1336A SWe c-M R-M Date (pCill) (pCill) (pCi/I)
Ma -96 4550 Au -96 1700 Oct-96 856 Mar-97 3680 3960 2590 '
Jun-97 1470 2800 1930 Se -97 2190 3040 1880 Dec-97 1570 2080 1200 Mar-98 1850 2300 1600 Ma -98 1820 1930 Jun-98 1850 Se -98 2110 2640 1510 Dec-98 1650 1820 1260 Mar-99 1450 2370 1160 Jun-99 569 1200 974 Se -99 919 3140 713 Nov-99 3470 1160 Dec-99 1410 Mar-00 1350 4350 1070 Jun-00 930 12.2 Au -00 547 Se -00 1100 Se -00 4030 939 Dec-00 1120 890 Mar-01 957 3560 946 Jun-01 747 3300 875 Dec-01 744 600 Dec-01 2490 Jun-02 826 3230 Jun-02 1060 Se -02 1030 898 Se -02 4050 Dec-02 1030 3990 1020 Feb-03 1260 4280 Jun-03 2060 5300 952 Se -03 2320 2810 873 Page1of2
TABLE5.2 CIMARRON CORPORATION URANIUMPOND #1AND#2AREATECHNITlUM99 DATA Sample Well 1312 Seep1208Well1336A Date Tc99 Tc99 Tc99 (pCi/I) (pCi/I) (pCi/I)
Dec-03 4300 3220 Mar-04 4590 3400 Ma-04 910 Ma -04 3140 Au -04 607 . 3320 949 Dec-04 943 Feb-05 718 655 Ma -05 801 2810 839 Ma -05 755 Se -05 1050 857 Dec-05 1150 614 Feb-06 915 635 Ma -06 851 2980 577 Sep-06 1150 2910 594 I
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