ML17305B154

Forwards Request for State Approval for Disposal of Low Concentrations of Radionuclides in Controlled Area

ML17305B154
Person / Time
Site:	Palo Verde
Issue date:	10/24/1990
From:	CONWAY W F ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	PRATT N V ARIZONA, STATE OF
References
161-03556-WFC-J, 161-3556-WFC-J, NUDOCS 9011050207
Download: ML17305B154 (253)

Text

ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM pl>>REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)SIZE:/i I ACCESSION NBR:9011050207 DOC.DATE: 90/10/24 NOTARIZED:

NO DOCKET;8 FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.NAME AUTHOR AFFILIATION CONWAY,W.F.

Arizona Public Service Co.(fo rly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION PRATT,N.V.

Arizona, State of I/

SUBJECT:

Forwards request for state approval for disposal of low D concentrations of radionuclides in controlled area.DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL TITLE: OR Submittal:

General Distribution NOTES:STANDARDIZED PLANT Standardized plant.Standardized plant.05000528'05000529 05000530 RECIPIENT ID CODE/NAME PD5 LA PETERSON,S.

INTERNAL: ACRS NRR/DOEA/OTSB11 NRR/DST/SELB 8D NRR/DST/SRXB 8E OC/LFgB REC FILE 01 EXTERNA'5:

NRC PDR NOTES W~~~<~I'~~hfwss LL>COPIES LTTR ENCL 1 1 2 2 e]ei 1 1 1 1 1 1 1 0 1 1 1 1 1 1 RECIPIENT ID CODE/NAME PD5 PD TRAMMELL,C..

NRR/DET/ECMB 9H NRR/DST 8E2 NRR/DST/SICB 7E NUDOCS-ABSTRACT OGC/HDS1 RES/DSIR/EIB NSIC COPIES LTTR ENCL 1 1 2 2 1 1 1 1 1 1 1 1'0 1 1 1 1 D D NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASIE!CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT.20079)TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEEDI TOTAL NUMBER OF COPIES REQUIRED: LTTR RC ENCL D D

,C~5 ,t Arizona Public Service Company P.O.BOX 53999~PMOENIX, ARIZONA'85072-3999 WILLIAM F.CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR 161-03556-MFC/JRP October 24, 1990 Arizona Radiation Regulatory Agency Attention:

Mr..Norman V.Pratt 4814 South 4'0th Street Phoenix, Arizona 85040

Dear Mr.Pratt Subj ect:

Palo Verde Nuclear Generating Station (PVNGS)Units 1, 2, and 3 Permit Application File: 90-001-028.8 Arizona Public Service Company requests state approval for disposal of very low concentrations of radionuclides's described in the attached document.This application proposes to leave in place approximately 450 cubic yards of slightly contaminated sludge from the PVNGS Unit 1 and 3 cooling towers which has been deposited in the Mater Reclamation Facility (WRF)landfill and covered with uncontaminated topsoil.The disposal site is located on Company owned land which is fenced and is only accessible from the Company controlled area which is routinely patrolled.

Since a determination that the cooling tower sludge was slightly contaminated, PVNGS has taken steps to ensure early detection of the waste stieams which might contribute to the potential contamination of cooling tower sludge.The potential radiological and environmental impacts of the proposed disposal have been analyzed and evaluated and are presented in this application.

The cost benefit of onsite disposal versus shipment to a low level waste facility is also discussed.

APS concludes, based on the information presented herewith, that the disposal of this material presents no significant impact or hazard to the public health and safety or to the environment.

Should you need further information for this evaluation, please contact J.R.Provasoli at (602)340-4160.Sincerely, MFC/JRP/pmm Attachment 901i050207 901024 PDR ADOCK 0500052S P PDC j l'i~5 0 1+e t 4)j 5 d"~~~~~~l1>I I 1 4k Arizona Radiation Regulatory Agency Attention:

Mr.Norman V.Pratt Page 2 cc: C.F.Tedford 4C:.M..~rammellf S.R.Peterson J.B.Martin D.H.Coe (all w/attachment) 4i 1 0 0 x'Z p I d: 5 P p C p p oc p IO C p I>>IE OI p D OI p O C V Ol p c III III P C 0 C 5~co lll III p IV lll O.W O.C O C CO 0 g III P I>>ll1 lU O E-C C III I C O C 0 QI O Q L'I I E V'Ig Z>>Q 4 Q o x oc v'2 g c Q Q Q QJ I ce WZ LU D C~0~ccc&a%+~4)Lccaul$0 C0 Wp~I E OO r E E~I f>>>>cP?'9 Sl~~gyggV.C+99)qgge On ggSO~(>>ggf Q C~pC~>><<?>>go"-i$S 5 e-~j~>>I'p i" 1 ng E El'I 5?a~>>I t s-I~Poz I I A>>I d~gQ g,-(P II@/0~i y~/f>>~o~~0!d~Ig~>>5/U~/i g/o~>>wP6o Tielrr>>I/~/ill'I'I>>~~~C i 90110 5 0207l OQ 43a P I r I 0 LOCATION: 150'orth of Slud e Dis osal Area LOG OF BOR(HG No.M E'W Loe OF MoNITonIHG eaLL Ho.M Ew I-IU n.I" tu 0-0 Z W tlat MATERIAL DESCRIPTIOH TOP OF RISFR EL GROUHD SURFACE'EL 1.5'pRoTEOTIvE chsIHG VENTED PVC CAP Silty clay,dry,med to lt.brn Silt med sand w/ravel lt.brn.Sl sandy silt, lt.brn.RISER: 3p 50-75 eo(y me san w c ay a e s Sl silty clay, massive w/gray green mottling, occas.gypsum crystals;med to sl.reddish brn.Silty clay w/sand-clay interlay rs Sl moist, med.brn.Sl silty clay, lt.brn.to sl.reddish brn,massive, tough drilling.2II'6'I sr~'t~)J 4m IljL Cgt CEMEHT GROUT BACKFILL~BENTONITE SEAL TYPE OF JOINTS:%311sll Threaded 0.02" slot size pl-100~~TYPE OF FILTER SAND: No.3 Montere SEDIMENT TRAP BOTTOM CAP-125 10"-150 INSTALLATION METHOD: Dual Wall Percussion Hamner 10" Bore Hole TOTAL DEPTH: lPP'ORING COMPLETIOH DATE: COMPLETIOH DEPTH: lpp~DEPTH TO YYATER: JOB: Aves Construction, Inc.JOB NO.: 253 LOCATION: Palo Verde MONITORING WELL INSTALLATION REPORT.Figure 4.4-3 (Sheet 1 of 2)GEOLOGIST; LFG ORAF TSl IAH: OATE: j 2/1/87 44 LOCATION: 1 O'orth of Slud e Dis osal Area LOG OF BORING HO.g E.p*LOGiOF MONITORING YIELL HO.ill I-U O X 0 LU MATERIAL DESCRIPTIOH TOP OF RISER EL GROUND SURFACE'EL 1.5'ROTECTIVE CASlNG VENTED PVC CAP Silt cia med to lt.brn dr Silt med sand w ravel lt brn.Sl sahdy silt;lt brn.RISER: 90 25 50 y me.san w c ay a ers Sl.silty clay, massive w/gray green mottling, gyPsum crystals med to sl.reddish brn.84 I 3 I OWm jP]CEMENT GROUT BACKFILL'BENTONITE SFAL~--75 Silty clay w/sand-clay inter-la ers sl.moist med brn.Sl.silty clay, lt.brn.to sl.reddish brn, tough drilling, massive.TYPE OF JOIIITS: DZlLSh Threaded 0.02" slot size-10',100-125 10" TYPE OF FILTER SAND: No.3 Montere SEDIMENT TRAP BOTTOM CAP-,150-INSTALLATION METHOD;Dual Wall Percussion Halnrer 10" Bore Hole TOTAL DEPTH 100'OMPLETION DEPTH: lQQ'ORING COMPLETIOH DATE: JOB: Ames Construction, inc.JOB HO.: 253'OCAT10H: Palo Verde DFPTH TO YIATER: MONlTORING

>YELL ORAFTS}tAH:

INSTAt LATlON REPORT OATE: 12/1/87 Figure 4.4-3{Sheet 2 of 2)

4.5 ANNUAL

DOSE'ASSESSMENT The dose assessment analysis for the occupational and member-of-the-public pathways was performed based on the radionuclide analysis of, over 190 core samples taken from the Water Reclamation Facility sludge landfill".Two dose pathways were evaluated for the-occupational.

worker: direct gamma exposure and inhalation of resuspended mater'ial.

Three dose pathways were 3 evaluated for a member of the public after operation of the facility has ceased: direct gamma exposure, inhalation of resuspended material, and ingestion involving.

consumption of groundwater and veg'etation-grown on the disposal area.In evaluating the dose pathway scenarios., it was determined that the only significant dose was'delivered by the direct gamma exposure pathway to an occupational worker.Direct gamma exposure to a member of the public after operation of the facility has ceased is insignificant because of the half-4 life of the radiological constituents involved and additional cover that will be present at that time.Inhal'ation exposures were not considered to be credible due to the minimum 3-inches of soil covering already in-place and the-fact that additional cover will'e added over the operating lifetime of the facility.The ingestion pathway was also not considered to be credible'ue to the inability of'the Water Reclamation Facility'sludge landfill to support vegetation growth.In addition potable water for drinking is not viable due to,the high total dissolved solids (TDS)content and depth-of the perched water table.In considering the sludge inventory, the only significant radionuclides contributing to external doses are Mn-54, Cs-137, and Co-60.Concentration of other radionuclides were measured at or below detectable limits.The'annual doses for these three radionuclides were calculated using the methodology in Appendix A and are included in Tables 4.5-1 and 4.5-2.The P estimated total annual direct dose to an individual occupying the sludge disposal area'for 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> per year.is 0.69 mrem.The source term was e 46

based on area-weighted concentrations derived from'Figuies 4.5-1, 4.5-2 and 4.5-3, and is somewhat more'conservative than using.an average of all measured concentrations.

Worst case doses were calculated using the peak concentration analyzed for each radionuclide and assuming these peak concentrations were uniformly distributed across the entire disposal area.-The maximum, annual dosein, this scenario is'3.3 mrem and is included in'able 4.5-2.Both the average annual andrthe peak annual doses are small when compared to the annual natural background external radiation of 58 mrem for Phoenix, P Arizona~~~.

In addition, it should be noted that adjustments for ,.representative values'of dilution and occupation time, and credit for additional planned soil covering would substantially decrease the calculated r doses.'47 e

• =Table 4.5-1 Average Annual Whole Body Doses to an Individual Standing on the Dried Sludge, Nuclide Area-Weighted Average Concentration'Ci/g Dose Rate mrem/hr AnnualDose'rem Mn-54 Cs-137 Co-60 2.25 x 10'.82 x 10 5.33 x 10'.7 x 10s 3.7 x 10s 2.7 x 10" 7.4 x 10'~7.4 x 10'~5.4 x 10" Total 69xl0 Ingestion.

pathways were not included due to the inability of the sludge disposal area to support the growth of vegetation and the high TDS content and depth of the perched water table.Resuspen-sion and inhalation of radionuclides is estimated to be negligible due to a minimum 3-inch@soil covering already in place.I'he area-weighted concentration conservatively includes all areas with radionuclide concentrations greater than 1 x 10'Ci/g.All other areas were at or below detectable limits.The peak concentration is assumed to be distributed uniformly in the sludge across the entire disposal area.The annual doses assume exposure of 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />s/year, no decay, and no dilution of the sludge by other sources.48

Table 4.5-2 Maximum Annual Whole Body Doses to an Individual Standing Directly.'on the Dried Sludge Nuclide Peak (Maximum)Concentration'Ci/g Peak Dose Rate mrem/hr Maximum Annual Dose mr em~Mn-54 Cs-137 Co-60 Total 7.00 x 10':67 x 10 2.59 x 10 1.2 x 10'.2 x 10'.3 x 10'~2.3 x 10'.4 x 10'.6 x 10 3.3 K 10 Ingestion pathways were not included due to the inability of the sludge disposal area to'upport the growth of vegetation and the high TDS content and depth of the perched water table.Resuspen-sion and inhala'tion of radionuclides is estimated to be negligible due to a minimum 3-inch"~soil covering already in place.The area-weighted.concentration conservatively includes all areas with radionuclide concentrations greater than 1 x 10 pCi/g.All other areas were at or below detectable limits.The peak concentration is assumed to be distributed uniformly in the sludge across the entire disposal area.The annual doses assume exposure of 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />s/year, no decay, and no dilution of the sludge by other sources.49

A~-~~-~-~~~C'igure 4.5-1 MEASURED CONCENTRATIONS OF MANGANESE-54 IN SLUDGE DEPOSITED IN THE LANDFILL (x10'PGi/g)

R f l f i f~a f-i f l i a'i a e i t I~~i Y i i ai~~h i s C i i~~~~~f a f i i i I i I\'I I V Figure 4.5-2 MEASURED CONCENTRATIONS OF CESIUM-137 IN SLUDGE DEPOSITEDIN THE LANDFILL (x10 pCi/g) x Figure 4.S-3 MEASURED CONCENTRATIONS OF COBALT-60 IN SLUDGE DEPOSITED IN THE LANDFILL (xl0'pCi/g)

APPENDIX A DOSE CALCULATIONS Assum tions and Tn ut'Parameters E 1.Based on'nventories and ,dose conversion factors, the.significant, radionuclides in the sludge were determined to be Mn-54, Co-60.A uniformly mixed slab-source was.assumed in the calculations.

Cs-137, and direct gamma dose 2.The energy (MeV), yield (8's/decay), and half life (years)data used in the dose calculations are given in.ICRP Publication 38+.3.The mass a'ttenuation coefficient (cm/g)and mass absorption coefficient (cm/g)for concrete and tissue are given in LaMarsh, 1977~'~.4.The sludge and soil densities (g/cm)used in the calculation's are assumed to be 1.20 and 2.00, respectively

'5.The shielded dose c'alculation constants (A, a>, and uq)are derived from LaMarsh, 1977'.6..'For a uniformly distributed interval slab source, assume flux 6 ra s cm-sec s , 2 x attenuation coefficien't (p)This is slightly conservative since the summa'tion term of equation 10.52 of LaMarsh, 1977~'~, is<1.For the cases evaluated, this term was assumed as I 1.0.7: Assume a 3-.inch soil cover for shielded dose calculations.

53

Shielded Coolin Tower Slud e Gamma Dose to a Worker (o,)"-ep/2[A E>[(1+a>)Ps)+(1-A)E>[(1+a>)P,])where (<>)'eo)CTS E>D 0.0576-flux (shielded) 2 x mass atten coeff for concrete x CTS dens I shielded dose calculation constant-cooling tower sludge number f'rom function graph shielded dose calculation constant-cooling tower sludge density (g/cm)3 se calculation constant shielded do-shielded dose-constant x e, x E x p,,/P x t constant shielded flux (6's/cm'ec)

-energy (MeV)mass absorption coefficient for tissue worker exposure time, 2000 hr/year.CTS conc x CTS dens x conv factor x ield 8's cm s Area-Wei hted Concentration C, ISO]+ISO'Aig+ISO'ISO'Ai>Isog>]+Iso/x where C-weighted concentration (pCi/g)ISOconcentration isopleth (pCi/g)from Figures'-3 A.,area within concentration isopleth (ft)2 A,-total area 54

REFERENCES" 1."Water Reclamation Facility Sludge Landfill Analysis Results", letter from Dr.'.John McKlyeen (Arizona State Universitg) to Judd Sills (Palo Verde Nuclear Generating Station)of November', 1989.2.""Population Exposure to External Natural Radiation Background in the United States", U:S.Office of Ra'diation Programs, Washington, D.C.(April 1981).3.Personal Communication from Barley (Arizona Nuclear Power Project)to Jim Holian (NUS Corporation) of May 14, 1990.4.LaMarsh;John R."Introduction

~to Nuclear Engineering", Addison-Wesley Publishing Company, Reading, Massachusetts (December 1977).P 5."Radionuclide Transformations Energy and Intensity of Emissi.on" ICRP Publication 38, Volumes 11-13 (1983).I~55' 1

5'SITE CHARACTERISTICS 5.1 Geo ra h and Demo ra h The PVNGS site is located in Maricopa Country in southwestern Arizona, 16 miles west of the City of Buckeye and 34 miles west of the.nearest boundary of the'ity of Phoenix.Figure 5.1-1 identifies the'eneral location of the plant site with respect to roads and highways, communities, and cities in the vicinity.The site area is flat with small scattered hills.~To the west and northwest of the site are the Palo Verde Hills, sharply rising to 2,172 feet above-mean sea level: To the south is Centennial'ash, an intermittent stream backed by gently rising uplands with scattered," isolated, steeply sloped hills and buttes.Buckeye Valley, bisected by the Gila Rive'r, lies to the east and southeast.

To the north and northeast, the terrain is a relatively flat desert traversed by numerous intermittent streams that are typical of the region (refer to Figures 5.1-2, 5.1-3 and Figure 5.1-2 illustrates the plant site, including topographical features.and the location and orientation of principal plant structures.

The total area of the plant propertyis approximately 4,050 acres.The'plant property line coincides with the plant site boundary, Units 1, 2, N and 3 and their supporting facil'ities

'are located in the northern half of th'e site.The si'te is bounded on the south by Elliot Road and on the west~-by Wintersburg Road.No public'roads or railroads cross the site.Site elevations range from 890 feet above mean sea level at the southern boundary to 1,030 feet above mean sea level at the northern boundary.Figure 5;1-5 defines the boundaries of the plant exclusion area.The exclusion area boundary coincides with the plant site boundary;except in the southern portion of the property.Minimum distances from each unit to"the site'oundary is provided in Table 5.1-1.56

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Cs,as<sf CC V/I le%~/cft jnftfwr>>r cess/>>/fscus frsvrr 4/I/ar/<<j Cu a>>.lr<<rarrjj rara r<<rras I~r jc<<ra av lrrar/Ira, C//j<<aaa ac a<<csacrr fr/ajar jjcj cljcsr lic~1 Cl<</4 s/,<<I rt j Ir alas/~r/rrr lr./rf./alla/Ia rri<<a ra<>IC I55.t-~Q Il II'a~51'o.45)4~0<J til I/w.-!I I SI APERTURE CARD jgSO Available Ort Apertttre Card<</ra<<<<sr K<<rt~//<<r/r r<<s//K<</K<<<<vr<<rr <<<<K jr/<<//sr/Ac sr/a<<<<t<<r r<<44~/<<<<a<<Knr/I/t<<r Waar<<j rr/a<<w/4 901105 0207'iro)1~~401, REV 6 Palo Verde Nnclear Generating Station SZTE GENERAL ARRANGcAENT (POWER BLOCK SITE PLAN)(Sheet 2 of 2)59 Figure 5.1-2 March 1990 Revision 2 I 0'I 2L M se~si~o~o~~~4("~':--".'........... e)~~~~ee (~I e so oo oe~~o i l'~o~Coo<~el<~o~s C~<~~~e I~.,-,..I (lI.((hW oo~e I e&o~~~~'.~~.~oo.~e X C~oo~~eos~ooe~e~-sg'(;~~~NW WNW t s i NNW to e NNE~1 NE L i~(~veI~o ee (<Moos ee~tM ee 0 Q~e~ee~Sr~o a~~ll e~os<~~~os~!~~~~D~~~~'i, s~IBIles~~WSW~e 5 4"-3 21~o~e i Sie<so E ESE I~oe(e(e(.~(m~~e~Qw so se we~SW It~~SSW awe eo~I~/~SE I~ite (Ia a sees~e es~os noo see~~Scale 1 0 1 2 3 4 5 6 7 MiLs~'alo Verde iluclear Generating Station NORTHlMMEDXATE ENVXRONS OF PALO VERDE SITE 60 Figure 5.1-3 cIO 1 0 Uc 7~9 war I aa*.-': "'"'ine-oootl)'o('Sprs',".."t'ut" is TURRET PK'.No vrct Brid e.r.r.,-nd Jct'-'=779~Kirkfand~c~2 Date<s<dg I 9 Yarnell ongress P Ylagone P(E At 75'.'ouosv or(ter O)tt.i(Ill).8 Buckskin tn 95+~ht , rker CBLACK'PK~EL (656 73 Post C LORA Bouse 95+ART LLERT PKS.-.'O-riot Sattt\app 04M.A arne ,v t,oke BATTLESHIP PK Bu(tcr i OIVctt..Coo(fwtn .':..-'-..:.":::Coides HORSE MTI EL'078"-+'-.r'Crow.: fhmb ly.y'al i--:.Put-.":.'son I', ONTO-fe'-'Kin'flee.;Horse ANTELOPE P fl.5786 Octave IIROOKLVN PK~t.537g d.'>>s-K~~putter>>.:r-.Gis Hoi scsh oc'..+rh-'7 Rcs-Constellation Thief Black Canyon.Rock Sp(P MERRITT Pc 11 93 7!1 m V/'hampie Castle Hot~~lo, g.rin s v'ckeltbvr 11"~4 hguila CUNNINGHAM PASS Rouse EL 2563 p.I7 p:Seven Sprs I!ew C (efre: c',.-"'ATIO~<<>nileWer',Ci oR-'E 7)ai(tcL.'-~dde 8 24>rp M RIVE!I,<<,.1.aarg a/IND, df'm.'rcl g 0 72 Ifing d hlcVay<<r.IBE)C Safome'+Y/enden 0 (9 tr'Il 11>60 Hop PA55 14 st Z (casa 0 rifle'80 93 Bg Yl!man Ar M A 23 River Csvn n Q ove A g ee om PORT...Rc.-,.MCOOv(p)I r~eer'c-+0~pi BIC H NPK 9 itt~s.Ma~rORES T C 0 INO RE L 1925 4p 4 APE M: JII2 Quartzsite nOerg'MO" 95 0$~La Bc(re=~IVitt ,.(=Fa l tc0oweif,>.. r, atpcc'"-t~cLTRIVEf,.It j.Sb oroAparhcLoke. a/AD RE$-'~(agrrarO L;C)an on 8 n yrt~n LokeOO so yr eel Ocr:.+1'orfiff Ffa Z)Q a)4ds'w IRON pache~o.'l F 5 Io 10 FELIPf PA55 0 cy EL l29 0 ah rOnrte M T 0 3 t TAIL PK T SAOOL ct TN Y U M$0Patm Canyon Sprs+EL 4828+0 Kofo Mine Cg VIRGIN PK-PEI 80 80 Jct+~~o Gilbert Kings Ra~Gode HA Oco'raoe O Line rty eye I,L~~Sa aoC uz).ow Gi dafu HAVE PK 7 767 82 20~a ER<P(ing Florence Jc (veen Creek 40 B0 IIIILi+GILA B IN)rs p$nt eel AS(0 N I.~q,"--enCa ks t.737 RES~,-87 9'".9-.I Lw Ectrplf Ron RES i S RA'Ianfief'0 7 l3 Rot e COOLl hasp E oso Grand Ruins Not'I Kofa 12 7 a palma c87 fOS'r 80 1 r4 Growler Mon (5 Tollec" cq0 87 20.Oaleland Oome rr piton Misr (ita ter (LI u ll I.Oha k 80 ll+rparria<A, rvcll 0 IABLE T+E!.437 o'--cyan(a,) F."B ncr Spra 0 I e en ELOY Picacho hrizc tCACHO PASS 8 Pt NOP 4 10 Red Ilier~g 8 SHEEP M'y.'I EL 31504.5p pfeftlon!1 0 r4 Yo 85 a cr Koha~I Friendly Cors Worth Komelik Peck Historicol o+>'-I Silver Sell'/p a('entana 0'I'hi(cs lVC(WP v a 10 CI 0 AJO'ro pr Pr IO'~~Hickiwan l2~P n~'Ot I Ihy<"!0 t.18 86 I E=Schuchuli OTtnayas Al(as$prinq so~+~a fojp huh Tule ll ctt a%a Yaya Chin~'racy 15 F, h I CSJaMCC APAG.h egarn 0<'I'L Santa Rosa+r~+~,'-CI hwa+FrŽI Saguaro INOIAN Ccet No)L Mon 0 Sit Hakya g~/~~a~tn uijOIOa p I M A RESERVAT/ONE+ a EXPLANATION OF MAP SYMBOLS~awe W<<WC~a a4 waaaa4 0 C u nC a'Tv'rs<<9 a S Other Tyauu9h Hqhwaya Local TIuou9h Havhways Outer Raada,'tOCaltundahuna vary-anaaWry Su99eatedi Goes cr Tc ns.Couhrr Scars.State Cap ta)s Gtr cr Urhan Areas 0 US.Nascnat Ccmc>>nes Isstene 5'14$d VA)A VS.)4acnal Mcnuments Aarooats (CcarrvncrcaL Msrary.Munro State and Pn)v ncaa(Panas E<<h campva9 4ckacst St>>ahd Pruvvaoat Parts iho canatava9 4cdsest State Mcrncnals. Monumcnts H s tahe 5'ccs Spnn9s ahd Wess Pa.C.c.SI Poants ot tn)a)est I PERTURB CARD Also Available On Aperkttre Card NORTH 0 5, 10 20 I Scale 901105 0207 zf f 30 miles a"easye Palo Verde Nuclear Generating Station un4aa Ccaaaa~aa cwavvcaw Parce are ss$$$$$$$$$$$$a TOLL Lulu)ed Access Oavadcd Ha9)aware~<<<<<<uc a a a$$FREE-Luau)cd Access Owvtcd$$9hways~4<<au<<a a a a Other Owvted Highways IPatsoate tach ar aaeaaavwu ara 9anaaaalac, Maaar aocaacaa~~v wtaaraaaaaaaCI Accumuuled rn(4$9$cctwttn rcd ponrcrs.dots cr lnterchah9es <<aaaa a a Qsa Hataunal Inttrstalc H)9hways U Transoahada $99hway~10~a)~9 tt S.Ha9hways I-Mtacan and I~(A)It>>Bypass)5 cense)Ame<<anH9hwaya State ahd O rh 0~Qts~Ice Pruwnoal Ha9hways Ma 0 InterChan9e Numcers Q)wv ahd Names Secchdary Sta:e.County.C~i ahd pruvuasaat I99h>>>>SCICCCC State a)ra)SVICS ahd Rcacscc Parak Cuuny Trans I'v.v ats thtershah94$ and Rett Areaa Tc~Stature and Scrvce mess 61 GEtlERAL ENVXRONS OF PALO VERDE SlTE Figure 5.1-4 I V U k WINTERSBURG ROAD II (p O~gl pi e')\\'=I'I.'(/I p;r:~I:(,'/g lire K:.-UNIT 1 UNIT 2 UNIT 3'jc/~C I,'a.', Itr,/.';I'r~i+, I',";.E LLIOT ROAD tWARD ROAD)NORTH LEGEND: CENTER LINE OF CONTAINMENT PROPERTY PURCHASED EXCLUSION BOUNDARY.SITE BOUNDARY PROPERTY PURCHASED OUTSIDE EXCLUSION AREA 0 SCALE IMiies)Palo Verde Nuclear Generating Station SITE AND EXCLUSIQN BOUNDARIES 'igure 5:1-5 62 Table 5.1-1 MINIMUM DISTANCES TO SITE BOUNDARY FROM CONTAINMENT EDGE Site Boundary DisLance (Meters)Exposure Direction, N NNE NE ENE ESE SE SSE S'SSW SW WSW WNW NW NNW Unit 1 1,037 1.057 2,, 006 1, 9.67 1,927 1,967 2,049 2,729 3,005 2,258 1,407 1,251 1,225 l.244 1, 254'.059 Unit 2 1, 31.0 1, 34-2 2, 544 2..206 2,163 2, 067 2,101'.025 2,698, 1,036 1,208 1.014 993 1,010 1, 191 1,342 Unit 3*1,661 1, 693 2,'755 2,336 2, 290 2,023 2,256 2.705 2,'34 5 1,607~1,057 809 871 005 1,045 1.561 a.Based on 22.5 sectors.63

5.2 Exclusion

Area Authorit and Control The applicant owns all land within the site boundary;therefore, the applicant also owns all land within the exclusion area.The applicant has'complet'e authority to regulate any and all access and activity with'in the exclusion area.There will be no unauthorized public access or'activity.

allowed within the exclusion area.The site boundary is posted and fenced with.light gauge wire.5.3 Po ulation Distribution Figure 5.3-1 illus"rates the 1978 estimated residential population located within a 10-mile radius of the plant site.Data are displayed at 1, 2, 3, 4, 5, and 10-mile distances from the center line of the Unit 2 containment building for 16 compass sectors.P Figures 5..3-2 through 5.3-10 illustrate the estimated residential"population located within a 10 mile radius of the plant site for the years 1980 through 2030.5.3.1 Low Po ulation Zone The PVNGS low population zone (LPZ)has been defined as a-6,400meter (4 mile)radius area, based on the center line of the Unit 2 containment building.The LPZ has been conservatively selected on the basis of providing effective emergency planning for the residents in the LPZ, as well as limiting radiation doses to below 10 CFR 100 limits to those residents outside the LPZ under the most conservative assumptions for a design basis accident.64 Annulus lmiles)Population 0-1 1-2 10 NNH 174 2-3 490 0 480 4-5 167 NNE 0 5-10 2.350 0-10 3.497 Annulus (miles)10-20 Population 10,765 NNH 0 20-30 1 30 40 14,490, 123,121 10-50 40.50 724,727 873,103 SI APE@I'UgE CARD A1sp Available 0)t Aperture Card 358 0 10 17 21 399 0 NE 0 685 t 0 147".10 HN'0 0 1090 HS'0 0 0 0 0'0 BS 10 0 0 17 17 1086~NE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 3 3 0 0 HNk 0 988 0 0 0'0 389 0 0 0 0 0 0 0 0 0 0 0 3238 0 0 319 0 0 1044 76493 73951 0 1030 ,o 6178 1087 0 0 0 0 39335 400862 E 0 684 ESE 0 10 0 SSH 0 0, 0 SSE 0 0 0 0 SSH 338%70 2893 859 SSE 88 SE IS 9 011 0 5 02 07-.o 9 Palo Verde Nuclear Generating Station 65 POPULATION DXSTRlBUTlON--1978 PALO VERDE SITE, 0 TO 50 MILES Figure 5.3-1 Jl' Annulus tmiles)0-1 10 50 1-2 2.3 Annulus tmiles)10-20 5-10 2040 3040 40*50 0-10 Population 180 2,506 524 514 Populauon 11,480 15,454, 131,306 93'1,120 3,735 772,880 0 0 1162 HS N 0 0 0 0 0 NNE 0 186 0 18 22 z25 0 18 7""" 92 c 18 p 110 p 0 0 0 0 0 0 0 0 0 0 0 0 0 p p 0 0 0 0 0 0 0 00 0 0 0 SSE 66 22 0 0 0 0 NE 0 E HN'0 0 1040 0 0 0 0 0 o g 410 0 0 SSH 3623 0 730 0 3rH 0 340 0 0 0 0 0 0 361 0 0 S l', T~pgg~gQ~V~RQ" C~3D 381 1572 10 1113 0 0 292160 81578 0 3356 1098 588 11596 01950 074<32 E 0 0 0 0 0 730 0 502 az 3086 SE 0 SSE 9011oe oko7-go Palo Verde Nuclear Generating Station POPULATION DISTRIBUTION

-19 80 PALO VERDE SITE, 0 TO 50 MlLES Figure 5.3-2 I I'1 t I('I

~~s~'~~0~'~0

!g 1 Annulus (miles)Population 0-1 1-2 12 575 563 4.5 196 5-10 2,753 010 4,099 Annulus (maesl 10 20 Populaalon 12,618 20-30 f 3040 16.984".144,312 40 50 10 50 849,335 1,023,249 204 0 0 0 3982 019 ,~;,~y+9.G~

gp,99 t og ,)geO js'ISO (~rg p pztto<e 0 0 1277 0 0 0 0 0 0 0 12 0 0 0 0 12 20 0120 0 0 0, 0 0 0 0 0 0 0 0 0 I 0 0 0 0 0 0 20 24 467 438 101 20 56 0 0 0 F'NE 1272 0 0 E Hll II I 1084 0 0 0 0 0 0 0 Q 0 0 803 IQ 0 Il i i 3796 Q Q 374 0 0 0 0 0 0 Q 0 0 1223 ENE 321106 0 89660 3688 1207 2<1 12705 46106 52143 0 Q 0 766 0 1006 0 0 SSH 16 0 16 0 SSE 0 SE 0 SSH 396 t 0, S 3391 SSE 9 0]]0 5 0 2 0 7l~j 5'alo Uerde ttluclear Generating Station POPULATlON DISTRlBUTXON--19 84 PALO VERDE SlTE I 0 TO 50 3iXLES Figure 5.3-4 a N 0~~e~0~~0~~~e 0~~4 0 0~~~~~~l~~~0~~~~I~1 lf I ll Annulus tmiles)0-1 Population 0 1-2 14 23 655 4.5 230 5-10 3,196 0-10 4,763 Annulus lmiles)10.20 Population 14.643 20.30;30<0 18,710, 167,474 40 50 10-50 985,459 1,187.286~..~~A ,,?237 0 0 6621 487 4, sts 0 28 0 0 931 2005 0 0 0 509 23 66 0 0 0 0 0 0 5 23 0 0 0 0 0 0 0 0 0 5 0 56 F'NE 1477 0 E h9t 1170 0 0 0 0 0 0 0 0 0 4405)0 0 434 1<20 4280 1401 372636 104009 403 1<790 5350560511 1 z82 0 0 0 0 0 0 0 0 I 0 0 0 0 0 0 28 0 0 0 463 0 0?0 0 0 0 0 600 0 1168 0 831 0 0 SSE 0 SE 0 0 SSW 460 0 S 3936 SSE 119 cy 01105 0207I-/sf?'?s?)5 h Palo Verde Nuclear Generating Station 0 70 POPULATION DISTRIBUTION--1990 PALO VERDE SITE, 0 TO 50 HILES Figure 5.3-6

Annulus (miles)0-1 Population 0 1.2 18 2-3 858 3-4 840 294 5 10 4,104 0-10 6,114 Annulus (miles)10-20 Population 18,806 30XO 4o.5o 10 50 20.30 25,315:, 215.091 1,265,461 1,524,673 N 0 304 12 0 30 0 0 0 0 1196 5935 0 625 2575 17 SI APERTURE CARD A1so Avai1ab10 Og Ape)ture Card 18 696 HiN 0 0 12 150 30 0 0 0 p180 0 30 6 0 6 0 0 0 0 S 0 0 1900 HS 0 0 0 0 p 0 0 0 0 0 0 0 0 0 0 0 0 p 0 1896 0 0 SE HN 1035~0 0 0 5wt 0 0 H 0.0 0 0 0 0 0 0 1823 E)NE 5658 0, 557 0 0 0 0 0 5C97 1799 33633 78589 0 0 0'0 0 0 0 971 ESE 0792 18996 S8718 77717 0 0 18 0 SSH 0 6 24 0 0 2<0 SSE 0 0 0 0 SSH 591 0 0 0 0 S 822 5055 j.500 SSE 153 SE 90110'2 Palo Verde ituciear Generating Station~kg 71 POPULATION DISTRZBUTZON--2000 PALO VERDE SETE, 0 TO 50 MlLES Figure 5.3-7

'I T i'I'I I' Annulus tmilesl 0-1 1-2 2-3 34 45 5-10 0-10 Annulus tmilesi 10-20 20.30 3040 40 50 10-50 Population 0 23 1,102 1,080 379 5,271 7,855 Popuiauon 24,153 32,512 276.250 1,625,039 1.957.954 N 390 0 0 NH 0 7622 803 SI APERTURE CARD Also Available On.Aperture Card 0 15 23".6 39 894 108 BN 0 0 0 0 15 8 p 0 839 23 0 193 0 39 39 0 0 0 8 0 0 0 0 0 0 0 0 0 0 23 0 0 0 0 0 0 0 0 H 0 0 0 0 0 0 0 93 0 2036 8 0 0 SE 0 0 1536 0 0 0 J 3307 2342 1753 0 0 0 7266 0 715 o H 0 0 0 0 0 0 0 0'p~0 , I 10.-.-691 0 0 0 61<669 71630 7060 311 3861 24397 88257 99814 0 0 1133 0 ESE 1927 0 SSH 31 0 31 0 SSE 0 SE 0 0 SSH 759 0 ol 0 SSE 197 SE 901105 0207/g Palo Verde 1 nuclear Generating Station 72 POP ULATZON DiSTRiBUTXON--2010 PALO VERDE SiTE, 0 TO 50 ttILES Figure 5.3-8 Pp II t!I 0-1 Annulus (miles)Population

" 0 1.2 33 2.3 1,576 3.4 1,544 4.5 541 5 10 6,76g 0.10 10,463 Annulus (milesi Population 20-30 41,758 k 30-40 40.50 10 50 354 7g7 2 066 61 1 2,514,386 Si APER.IL:~~K CA2" 0 501 22 0 55 0 0 0 0 1973 9790 NNE 1031 28 AlSO AVQPB'3t" 6 Ape 1:~te Cwtl NE 0 66 1280.22.1201 276 55 155 0 0 11 0 33 0 0 0'11.0 0 0 11 0 0 0 3140 HS 0 0 0.0 0 0 0 0 0 66 0 0 0 0 0 0 0 133 0 3128 NE 11 0 E 0 SE 0 0 0-', 2102 0 0 0 9332 0 918 W 0 0 0 0 0 0 0 0 HS 0 0 0 0 0 0 0 0 0 1356 0 0 0 1323 3008 ENE 0 789~Ã2 220031 9068 968 78Q23$$><11335)281S58E 0 0 33 0 SSH.0 0 0 0 SSE 0 0 0 0 SSH 975 0 0 S 8338 0 SSE 901185 82 Q7'P Palo Verde Nuclear Generating Station 73 POPULATZON DZSTRZBUTZON--2020 PALO VERDE SZ'EEi 0 TO 50 MILES Figure 5.3-9.

I Annulus implies)Population 0.1 1-2 43 2-3 2,025 1,964 695 5-10 8,695 0-10 13,442 Annulus imiles)10 20 Population 39,842 20-30 30.40 53,630'55,678 40.50 10.50 2,679,824 3,228.974 gV/~PER"'BEE Ci~D 0 NNH 12573 1324 Also Avai:"-bfe Ga ApP,"f,di Q CQfd 0 28 28 71 1644 199 2534 0 5"55 3863 0 0 p 0 1543 p d3 71 71 170 10 NE 4018 Hil 2618 0 11986 0 0 180 11646 EHE 1013908 83107 0 0 0 0 0 0 0 0 0 10 14 0 0 H 0 0 0 0 812 10 2864 40203 0 16<6060 E 0033 HS 14 0 0 0 p 0 0 85 0 0 SE HS 1032 0 0 p 0 1741 3178 15 z5 57 57 0 SE 1252 0 10708 324 SSH SSE SSH SSE 901105 0207/f Palo Verde ituclear Generating Station 4~F I 74 POPULATION DISTRIBUTION--2030 PALO VERDE SITE I 0 TO 50 MILES Figure 5.3-10

'C As indicated in Figures 5.3-2 through 5.3-10, the population density.of the LPZ is low and is expected to remain as such throughout the plant life, thereby enabling effective emergency planning.Figure 5.3.1-1 illus'trates the LPZ in terms of topographic features and transportation for evacuation purposes.There are no schools, hospitals, prisons,.or parks-located within either the LPZ or a.5 mile radius.5.3.2 Po ulation Densit Figures 5.3-3 through 5.3-5 show'the estimated residential population located within a.50 mile radius of the site for the years of initial'nit operation, i.e.,'1982, 1984 and 1986.Within.a 30 mile radius of the site, the following residential population projections are estimated".

1982 1984 1986 32,187 persons 33,701 persons-35,415 persons 4'I Table 5.3.2-1 lists the cumulative residential population density within, a 30 mile radius of the site by annulus for the three unit startup dates.As can be seen from Table 5.3,2-1, the PVNGS site falls well below the uniform population density standard of.500 persons per square mile as expressed.in Regulatory Guide 1.70, Revision 3.Figure 5.3-10 shows the estimated residential population located within a 50 mile radius of the site for the end of the decade of ,plant life end, i.e., 2030.Within a 30 mile radius of the site, the 2030 residential population projection is estimated to be 106,914 persons.75 hl I 4'al<<4 hi~I r Sl~~~~>>has 4 I I<<4<<a~I I~~r so'~>>~~~al Isla>>>>~I I~1st~I I)1<<'I tl tl It.)0'tl I I~~ta Is~I~>>C Ill I h>>a)4 40,1 (,~asst~>>Ta<>s I I)1 3'.)r I i>>S ll)<<I~~>>I'))t~~4~r I I~I>>~~sai<<)I ass<<~I)$I N I Ij'"':.I w, tt aa>>)i:,)~4 I~a , I']lt~I I s C 4..)-I)~,sa I I>>I~a I~at I<<I 1~I.<<>>V'g.'4~Q s>><<>>IVIn l.: 0)~~I jf s I I I I/4 I)I I.i~s.a 1\~)C tj 10<<LEGEND HARD SURFACE, HEAVY-DUTY ROAD HARD SURFACE, MEDIUM-DUTY ROAD IMPROVED LIGHT-DUTY ROAD trot=0)UNIMPROVED DIRT ORAO TRAIL s I I~l)as O..I 1 h.H Y'.I)0<<L X>>L 4~~\L r'.11 LCO (l I~f~0)s lll;ll I WINTERSBURG s)I I I~t./I'*-L,Y"'-'I~a~)I~<<I'-qI.~,)tl SL t)~4 ti;I a af RAILROAD: Slis(GLE TRACK RAILROAD'41ULTIPLE TRACK~BRIDGE~~I a>>f DRAWBRIDGE TUNNEL FOOTBRIDGE OVERPASS-UNDERPASS BUI,LOINGS IDWELLING, PLACE OF EMPLOYMENT, ETC.)Oil I 1>>a II I L)a\L"..0..I fr.<<.,ij~q:ls I I PALO VERDE NUCLEAR GENERATING STATION ,I t 4~I I I~I 1>>is I>>ah J I'ILO<<4 Ii>>t)4 I Lval>>rhr<<s I~ILO<<0 I<<~)', g)SI APERTURE CAR9 pesp A++)fQble OD Aperture Card IS\s>>~J'>>()~>~r')'<<<<I~It I I<<s (I:-, s)E)I~E',\rs (<>~I I~~I I r ISW I rN I~1$I I~)I I~~~NORTH GRAPHIC SCALE IN I4)ILES I 2 I.I~~4~~~r I I I.I'l~I~Ha~~~76~7'N J)~Irl, s l7 r/r (tl ha t)qaa~=Ps'4 (I~I (!i..-'I I I I I l II I I ix+I-8/I Cs r Cs I 4 Tr>>~I 4<<.,>>>>~ts Palo Verde Nuclear Generating Station IDH POPULATION ZONE Figure 5.3.1-1 II0I,1050207 ff I!

CUMULATIVE RESIDENTIAL POPULATION DENSITY HITHIN A 30-MIf E RADIUS OF THE PVNGS PLANT ITE DURING YEARS OF INITIAL PLANT STARTUP (PERSONS'ER SQUARE MILE.)Miles From Plant 1982 1904 1986 0-1 0-2 0-3 0-10 0-20 0-30 0 22 16 12 13 2'3 37 13 13 1?0~22 14 13 77

Table 5.3.2-.2 lists the cumulative residential population density within a 30 mile radius of the site by annulus for the end of the.decade of plant life end.As can be seen from Table 5.3.2-2, the PUNGS site falls well below II the uniform population density.standard of 1,000 peisons per square mile as expressed in Regulatory Guide'1.70, Revision" 3.5.4 SITE GEOLOGY 5.4:.1 Site and.Site Vicinit Ph sio ra h The site is located in one of the intermontane valleys of the Sonoran Desert region of the Basin and Range physiographic provinces.

This valley, known as the Tonapah Desert, is broad and relatively flat-floored, with through-flowing, intermittent drainage graded to the Gila River, the regional trunk stream.The site lies between two major intermittent drainages, the Hassayampa River on the east and the Centennial Wash on the southwest.

These two drainages are within 3 to 5 miles of the site and drain toward the northern bend of the Gila River near Arlington.

The major surrounding mountain ranges are the Palo Verde Hills.to the west, the Belmont Mountains to the north, the White Tank Mountains and Buckeye Hills to the northeast and southeast, and the Gila Bend Mountains to the south.Like most mountain ranges in the Sonoran Desert,'the flanks of the surrounding mountains consist of pediment and alluvial fan surfaces that grade gently to the basin floor.The basin floor slopes gently southward from about 1,500 feet above sea level at the edge of the Belmont Mountains to about 800 feet elevation along the course of the Gila River, southeast of the site.The site is nestled between outliers of the Palo Verde Hills on a flat surf'ace, at about 950 foot elevation.

The nearest edge of the Palo Verde Hills i.s about 2 miles west.of the site;the outliers are low-relief, rounded knobs protruding through the alluvium north and south of the site.The Palo Verde Hills range in elevation from about 1,200 feet directly 78

Table 5.3.2-2 CUMULATIVE RESIDENTIAL POPULATION DENSITY WITHIN'A 30-MILE RADIUS'F THE PVNGS PLANT SITE FOR THE END OF THE DECADE OF PI'ANT LIFE END (PERSONS PER SQUARE MILE)Mil,es From Plant 2030 0-1 d-2 0-3 0-5 0-10 0-20 0-30 0 3 l 73 81 60 43 42 38 79 j A I f l II I (

C adjacent" to the site to more than 2,100 feet at their highest point about 5 miles northwest of the site.The basin floor is dissected by several small ephemeral streams which flow southward and are integrated with the Gila River, about 10 miles southeast of the site.The natural, intermittent flow.of water in th'e washes has now'een interrupted, by an agricultural irrigation system and by PVNGS construction activities.

The micro-relief system, leveled'n local areas by agriculture, consists of small rills and gullies that carry the normal*runoff into the washes.5.4.2 Site Vicinit Strati ra h Figure 5.4.2-1 is a geologic map and simplified stratigraphic column~~of the area within a radius of 25 miles of the site (site vicinity).

Figure 5.4.2-2 shows'eologic cross-sections illustrating the sub-surface geologic'relationships of.the site vicinity.The geologic formations within the, site vicinity are typical of the Sonoran Desert subprovince and include highly deformed metamorphic and granitic rocks of Precambrian age and moderately defor'med volcanic and sedimentary units of Tertiary age in the mountains, and undeformed volcanics and sediments of Pliocene to Holocene age in'the basins.The metamorphic and granitic rocks are termed basement and moderately deformed volcanic and sedimentary units are termed bedrock, and the undeformed volcanics and sediments are h termed basin sediments.

The emplacement of Precambrian plutons on granitic and.gabbroic E composition are'generally associated with the culmination of the Mazatal Revolution, and resulted in the metamorphism of surrounding rock to schist and gneies.The metamorphic rocks aie the.oldest rocks in the site vicinity and are'subdivided into three subgroups:

greenschist facies metamorphics, metadiorites, and gneissic, granitic and hornfelsic rocks.-80 f I!1 rl I I Zi I 1+A~r'4-'I:.I I I l 1 gl V SI APERTURE CARD Aiso PjvailaMe On Aperture Card 3000 I OOKED Sea LeveI-IOOO'SOUTH INTERSECTION OF B-B'~Ccarcmial Wash i~Sile Propcrry!palo Verde Clay Os,~~~I Os;.I Oibt 1~'I ioaopah Oeserl Oibt tt(RTH A'3000 Sea Level-1000'...:@ra.Osa~~~)I~~~.~~::::::::::::::

f:::::::::::.Pf p+arI::::.i:::::::-:::::.

t:.::.i':i:

Jt,, 0 0 20gOO FKKT HORIZOttTAL SCALE Vcraaal Ksaaacralionr 6.6iX 2MO 4.CCO FKKT VERTICAL SCALE 40,00C 8 SOUTHWEST I 3000 INTERSECTION OF A-A NORTHEAST B 3000'OOO'eo Level-IOOO'assoyaropo River Ccaicaatal Wash PA.O VKRDK HILLS Oslr ipalo Verde Clay nita,'"bs Oibt OFa w::y:;;;::ll pCer:::~~Oib t'::::::::::I:"'"::"I:W

~.S i~t~'"""""'""""""""'

"~~a~~~IOOO'ea Level-1000 Figure 5.4.2-2 GEOLOGIC CROSS-SECTIOiV 901105 020y gl 82 l J The greenschist metamorphic rocks make up, onl'y a small fraction of the rocks in the site vicinity.They crop out'miles west of C Gillespie-Dam and on the east flank of Saddle Mountain.The metadiorites are rare intrusive bodies found only in conjunction with the greenschist metamorphics in the Gillespie Dam area.The A C e gneissic rocks are.the predominant'metamorphic subgroup in the site vicinity and compose about'ne-third of the Belmont Mountains and all of the Vhite Tank Mountains.

A large segment of the Gila Bend Mountains, 20 miles west"of Gillespie Dam, is compos'ed on gneiss.Scattered outcrops, of gneiss are also exposed 2 miles south of Gille'spic Dam.The granitic rocks are represented by granite and quartz monyonite, including aplite and alaskite, outcrops in the eastern portions of the Belmont Mountains, Maricopa Mountains,'he entire Buckeye Hills, and in the Gila Bend Mountains.

Although not exposed in the Palo Verde Hills, granitic basement rocks were encountered in exploratory borings beneath the site property.Bedrock in the site vicinity consists almost entirely of Tertiary volcanic rocks and Tertiary volcanoclastic and sedimentary rocks unconformably overlying the Precambrian basement rocks.The age and composition of these rocks-are similar to those throughout the entire Basin and Range province, Tertiary sedimentary and volcanic rocks are exposed in the western portion of the Belmont Mountains and the south-central flanks of the Gila Bend Mountains.

Sedimentary rocks in the Gillespie Dam area consist'of arkosic conglomerate, lahar deposits, tulfac'eous sandstone, and eros'sbedded sandstone.

The Tertiary sedimentary members of the sequence are interbedded with the Miocene'ndesite and basalt.flows, flow breccias, and pyroclastic rocks.The Gila Bend Mountains are primarily composed of andesite and basalt which range in age from 19 to 28 million years before present.In the Palo Verde Hills, basaltic andesite, diabase, and basalt, with minor amounts of interbedded tuff, are approximately 17 to 21 million years old.83

i.

Basin filling deposits overlying the Tertiar'y.volcanic sedimentary bedrock sequence are talus, colluvium, alluvial fan, basin alluvium, lacustrine, and fanglomerate.

Ages of alluvial fan deposits on the surrounding mountain flanks range from Terti.'ary to Holocene, based.on potassium-'argon ages of overlying basalt flows..Two series of alluvial fan, deposits, (QYfn and TVfn)are stratigraphically below the Arlington and Gillespie basalt flows and, therefore,'re late Pliocene in age (greater than 2 million years before present).Massive, extensive clay deposits penetrated by numerous water wells in Phoenix and Gila Bend basins attain a thickness of more than 700 feet between Phoenix and Litchfield Park and 850 feet'in the Gila Bend Basin.These clay deposits are usually continuous across individual basins but'here is no direct, evidence that they are continuous between adjoining basins.Late Tertiary and early Quaternary basalt flows interbedded with and overlying the basin sediments are the youngest volcanic rock units in the site vicinity.Four extensive olivine-basalt flows overlie Gila River terrace deposits and alluvial fan deposits.Whole-rock, potassium-argon ages.of these flows are: Gillespie:

1.3 to 4.2 million years (nine samples)average age 3.3 million years.Arlington:

1.2 to 3.2 million years (six samples)average age 2.2 million years Sentinel: 1.71+0.25 million years (one sample)Gila Bend: 2.5 to 6.5 million years (three samples)average age 4.5 million years e 84 i I 1 I The youngest volcanic flows appear to be similar to widely scattered geomorphically young vents and flows throughout the Sonoran Desert subprovince.

These volcanics are generally shown'on published maps-as Quaternary basalts, but the age data given above shows them-to be earliest Quaternary and/or latest Tertiary in age.P 5.4.3 Pro erties of.Subsurface Materials Soil properties presented herein were deriv'ed from investi'gations-conducted at five unit areas which included the location of two potential units (Units 4 and 5).~The'engineering proper'ties of subsurface soils were inyesti;gated by drilling, sampling, laboratory testing, and geophysical-testing techniques.

A summary of the generalized stratigraphy and associated eng'ineering properties is presented in this section.Profiles depicting the generalized stratification, of subsurface materials at.the units down to bedrock (approximately 300 feet)are.shown on Figures 5.4:3-1 through 5.4.3;3.The actual detailed soil stratification of the upper 65feet is shown in the detailed excavation mapping of each of the power block excavations.

The'tratigraphy

'disclosed by the mapping is consistent with that derived from borehole information.

85-

~~~~~~0~~~I I'I I I~I~~I~I I.I I I~I'I I~I~~~I I~I I I~'I.~~.~iLwL>I~~~I I~I~I~~I I~I~I~I~'~)tT))lp)))i]f))

I~I~~R~~I~~I.I~~I~~~~'.I+.'~~~~I I I I~I I I~~I I I~~~I~~I'~~~W~'~~~

,h.,q*a i'h~1 (~11 CX 1e UNIT 1 SECTION A-A'A gSO Ay~-,~QQIe Gee~yoorfqe1:e CQE'6 ELEVATION (IeeII 960 920 LITHOZOV SEQUENCE 811 812 819 810'815'88 814 82 81 82 (, 830 ELEVATION Ifeee)1000 STRATIGRAI'HIC SEQUElICE eEO 880 840!!!!1!!!!!!!i!!!!!!!!!Illll!!!!l!,!l!,!lil<ill>llll,'le>>>>>>>>llil iiiiiiiliiliilIilllllli

~"(>"'e'n J'!!'!!!l!llllllk lllllllllllli iliilllii>>>>>>>>>>>>>>>>iliiiiiiii iiiiii e 7ii iiii>.iiiiiiliiillliliilliilllllllllllllllili Iililliilliillllllllllllllllllllllllllllllll lliillllililllllllllllll/i//i/ii///fi C 0 e20'80 640 600 ('I('>0 o~i I ht~>~.j,i'>(e(e-(49>)?~,e e (cA (cII'('i.j~ie.~r."(e ji(~',4q>k 7e p f~e.e:e (':i()', e(cv',.((-,'-e~~--G 800 160 220 220 c40 600 4?0~>~~~(~~~'(~+~g.Q 0'b.g'>o:+++J.Q.o O'o.O"4I~Ce.(e W'~4'eO'O+(e.4~~~~Q'~~'Mg: 4 O.gl C).e o 0(~O Q.-'bW~'o's so~"~s>~+QoyQC>>'oCiO<~C((goO>ee(e 4+.0 gO'>0 ((Q (e$0 jsQe Q(Q~~,~E e(~++++(+++j+++o Figure 5.4.3-1 GEOLOGIC PROFILE THROUGH UNIT 1-0 5cO 520 I (Sheet 2 of 3)87 (;902205 0207l~%

p 41 l~

ELEVATION (feet)1000 UNIT 1 SEI:TION B-B ELEVATION{feet)1000 960 920 880 840 800 760 LITH OZONE SEQUENCE 84 i~,.~...,,;,',I

~~'" I I<l!I!!/IIIIIII~-Zv<i~~Z4: "82 Bl 483'818~"w)":~p'j~i s"~4""~'!i[I!!Ilj!f I I~t<jlljlllll 8 STRATI G RAP HIC SEQUENCE::-::~...-r.-...

I-.-.-8-C"".~.:;1-"~O ilii IIII-E 960 920 SS0 840 800 760 SI APERTURE CARD Also Available On Aperture Card 720 680 720 I 640 600.4QQ'p.4'..~

I.o'Q 0 o Ij'DI.,'Q" O-.jj.'Q.g4" e.r a OO::4 m.600 560 520 480 440 520 901105 0207 IIO palo Verde jfuclear Generattng Statton 440 t GEOLOGIC PROFILE*THROUGH UHXT 1 (Sheet 3 of 3)88 Figure 5.4.3-1~Ir li 1 C I GENERALIZED SOIL AND ROCK D ES C R I P T I ON S~)SO gq(td8.~0>e (I'~r Lgrg Cs~SILTY SANO, GRAVELLY SILTY SANO and SANDY SILT;(SM,ML), brown to yeHow brown, thin clayey silt horizons.SANO with SILT;(SP), brawn to yellow brown, scattered lenses of silty sand, clayey sand and gravel.SANDY CLAY-CLAYEY SANO;(CL4C), red brown to red yellmv, occasional gravel.CROSS SECTION LOCATION UNIT 2 812 Bg 811 GRAVELLY SILTY SAND, SANDY GRAVEL, and CLAY-EY SAND;IM,GP.Gyf,SC), brown to yellow.NORTH 822 8Se 815'I 1 814 SILTY CLAY and CLAYEY SILT;(CL-CH, ML), brown to yellow red, occasional thin sift and sandy silt horizons.~84~1 82 a~~>>i~i<!ip p.gg-r~>>jjcl g'~SANDY SILT, CLAYEY SILT and CLAYEY SAND;(ML, SC), brown, 1ocaNy~coos, occasional siity sand horizons.SANDY SILT, SILTY SAND, CLAYEY SANO;(MLiSM, SC), brawn ta red bravrn, accasianal andy clay horizons.SILTY CLAY and CLAYEY SILT;(CL-CH, ML), brmvn to yellow red.834~sss 83 818'5-SILTY CLAY;(C L.CH), red brawn.EXPLANATION SANDY SILT, SILTY SAND, SILTY with SANO;(ML, SM), brown to yellow brown, occasional clayey sgt horizons.FAH GLOME RATE;red brown, herd.'Lithozone units as noted in section 2.5.1.2.2 , 5 Stratigraphic member~Barings used to construct profiles Borings projected to profile line AN DESITE;purple gray, herd, aphanitic.

SCALE 40 20 0 40 80 120 901105 0207 Palo Verde Nuclear Generating Station 89 GEOLOGIC PROFILE THROUGH UNIT 2 rsheet 1 of 3)Figure 5.4.3-2

'll I I'h yA~r v~,, l f UNIT 2 SECTION.C-C'I APERTURE CARB Also Available Og Aperture Card EVATI ptt rtrep IJ0 ELEVATIC'.

Iteet)co LITHOZONE.

SEOUE'ICE 812~~810 16 t81~~I I>(~82 81 83 818 t8 j 828 I'830 832 STRATIGRPAHIC SEQUENCE.-C 860 820 60",jjjlijfjIjlljjjjljjli

!I!III!lljllij!rtI ij!II!lllIIIII

.k';II!!!I!',I!.I:I I!!II!Illllillll I!Iillll!!Ill!Jllllilllllli!

I!!IIIII!IIIIIIIIII Illlllijil

-'0 840>~>~>"-".~>r" 6'I.o t>v>>rfu qotp~c<<~><<>>t 0'r~~r't'%A>>>rt'st<<h.t>2>>ir p:i+r'a~<<Y(>c~g'pt>>>pq'~t

~i.<<t3><~w+wr<<'<<<<r~"--K 60O jep~">'>'K 22P 660 PoCt~o.et'" 0'ig o0.'.O,<.o..o go'~~opgO.A o.O;og43.0'-".%+o.O.O~G'00 t Q Q 0 6>P Qo P<~4<<3 0,'g'OO (jour>CHOO!>>

OCI y~>~rrr 4>j~>t y~g~~-'q O'-a.<0:~;Dodo:4?0,'-O5'oO,.-.'0

++++)fr'rp'Vg.

'jgo.t QOCre~;4'6-

~, p., V, 04rjp~Opgjo'!pp eg OtpQ'.0~$: g 0.~O'Ct.GQj o g t'.0 0 Figure 5.4.3-2 GEOLOGIC PROFILE THROUGH UNIT 2 (Sheetj 2 of 3)P 640 600 Seo 460 440~'t 90 rj 01 I 0 5 0 2 0 y~g ttt I'

Sl p~4 LINIT 2 SECTION D-D'<<L<<~<<gf ELEVATlON (feet)1000 960 LITHOZONE SEQUENCE ,B4 Bl.83<<+BS ELEVATIO~-(feet)1000 STRATIGRAPHIC SEQUENCE 920 880~~<<<<,<>gZ IIIIIIIIII!!

I<<&7....." r.':.',.'."';.:.:.

<<>liilllll!

iliii<<'~'C 920 880 840 840 800 800 760 j<<<<'t~/760 1 720 I 720 i 680 680 640 640 600 560 520 480 440 91<<0" o'...g'..q.-.oO.'O:..';.

")'O'~.,o kg~, j.o.j:.o.,op..'o:;0::: oj:g'o:ogDpo;0

.:;~.'.0'0

<'<j~,>>.o:.m"ri-i"'-::.0:.ng0.oe..o.:0::,:o..og'~40:+,;-.~....e a'o;.'o cj~-0,'i';~<OO.::.:ol)":.'o'.:.-.'-O.'C.o.e+g..'g.g:0;.0.0:o~,'.a~

o.-Po..o.o-L 600 560 520 II 480 440 1 eppes 05 0207~/$Palo Verde t fuclear Generating Station GEOLOGIC PROFILE THROUGH UNET 2 (Sheet 3 of 31 Figure 5.4.3-2<<g

GENERALIZED SOIL AND ROCK DESCR I PTI ON S SILTY SANO, CLAYEY SANO SANDY SILT.(SM,SC, ML), brown to yellow brown, cclczreous, acca:ionzl fine to medium grained gravel.SILTY SANO, SANO;(SM, SP4hl), brown to yellow brown, occasional horizons of silty sand and clayey sand.CLAYEY SANO, SANDY CLAY;(SC, CL-CH), brown to red brawn, occasional gr(vtl.SILTY SANO, SANO, CLAYEY SANO, SANDY SILT;(Shl, SP, SC, ML), brown to yellow brown, occasional thin lenses of silty clay.SILTY CLAY;(CL.CH), brown to red yellow, occasionzl thin lenses af clayey silt and sandy silt.CROSS SECTION LOCATION UNIT 3 NORTH e 812~BS 818 88~822 F 814 82 j~81 F SANDY SILT, CLAYEY SILT and CLAYEY SAND;(ML, SC), brawn, locally micaceous, occasional silty sand horizons.818 85 SANDY SILT, SILTY SAND, CLAYEY SANO, SANDY CLAY;(ML, SM, SC, CL), brown to yellow brawn, locally micaceous.

830 SILTY CLAY, CLAYEY SILT;(CL.CH, ML), brawn to red yellow, nan calcareous ta very calcareous.

SILTY CLAY;(CL-CH), red brown to yellow red, calcareous.

SILTY SAND, SANO with GRAVEL, CLAYEY SAND, SANDY SILT;(SM, SP, SC, hlL), brown to yellow brown.INTERLAYEREO FLOW BRECCIAS and FLOWS;gray, hard, moderately to highly fractured.

SANDY TUFF and CLAY;red to gray white, dense to very dense, crudely stratified.

ANOESITE;purple gray, herd, aphanitic.

EXPLANATION Lithozone units as noted in section 2.5.1.2.2 Stratigraphic member Bonny used to construct profiles Boriny projected to profile line 9011 0 5 02 o 7 SI APERyURp CARR Also AvaIIRble Cn APerfttrt'grd 92 SCALE aa 20 0 aa 80 t20 FEET Palo Verde Nuclear Generating Station.~A<.k4.':.GEOLOGIC PROFILE THROUGH UNIT 3 (Sheet 1 of 3)Figure 5.4.3-3

0 UNIT 3 SECTION E-E'(h sj;APERTURE CARD Also Available Og Aperture Card EVATION 11e as)300 ELEVATSC Isecs)10 760 320 LITHOZONE SEQUENCE~811 812.(("-~89 810 815 814'82 81 08)STIIATI 0 11 AF Nl C SEQUENCE 833-A 96 SSO 840)IIllls!III!slli Iiiiiiiiilillll!

Ii I<<!I<<>>lllII lllill.IIIIII llill>>l!Ilail>>ll<<ill<<lllllllllllllllllllllllllllll II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIlllllllillllislll sliiississssssi(((("sss'::;,"-ss((ssss

':.s(sssss(-C sl(l;(F 921 ss",~((~s<<g<<7p SOC 760~+(s (~s (g (w (y~.(<<()<<g(y')q~766 720 80 726 68'ssss 6~600 560+++J+++60i i6'20 57'80 440 Fichu GEOLOGIC PROF (Shee e 5.4.3-3 LE THROUGH UNIT 3 t 2 of 3)44<<93 9012 05 0207~PIP

\'I-l E 0 UNIT 3 iECTIQN F-F ELEVATION (feet)1000 860 920 LITH OZONE SEQUENCE B4<<82 81<<83 B18<<85 ELEVATIOll (feet)1000 I 860 I 1 820," STRATIGRAPHIC SEQUENCE SI APERYURE CARD Also Available On~Aperture Card 880 84 jqljl jjL!f,')i:Li UJJ'fjj!IIII III I><sufi IIIIII/!Ii i-F ,G 880 l 1 840'800~I~p/a~a (.4 I;h,~1+r'(l4~c w)lp~~A~)gf, 800 760 760;720 3 720'80 640 600 560 520+++++++++++++++++L 680", N 640 f I 600!1 560;520 I 480 440 440 Palo Verde Nuclear Generating Station 94 GEOLOGIC PROFILE THROUGH UNIT 3 (Sheet 3 of 3)Figure 5.4.3-3 l

.of fine sands, silts, and clays of low plasticity are also common within the.transition zone.Such soils, classified as SM-ML and SC-CL, are generally'stiff to hard and exhibit localized calcareous, cementation.

Layers of sands with low silt and clay content (typically less than 30%fines)"are also encounteied within the transition zone..The sands within the intermediate zone are generally medium dense'to very dense'.I The intermediate zone generally increases in thickness"and h complexity of laye'ring from Unit 1 southward.

At Unit 1, the transition b'etween the upper coarse-grained and lower fine-grained zones is very abrupt in most areas and the intermediate zone is discontinuous in'those areas.At Units 2 and.3, the intermediate zone generally occurs within the interval of approximately 30 to 50 feet deep, immediately above the well-defined stratigraphic member E contact.The lower zone deposits primarily consists of medium to highly plastic, hard clays.Sands and s'its comprise a very small portion of the formation.

Layering within the deposits is uniform and relatively'flat.

Several major layers are traceable across the site.5 4.3.2 Static Soil Pro erties The results of the field and laboratory testing program were used to evaluate-the engineering properties of site.soils.Typical static material properties foi site soils are presented in Figure 5.4.3.2-1.

Grain size and plasticity characteristics of various soil" layers are presented in Figures 5.4.3.2-2,and 5.4.3.2-3.

Results of standard penetration tests in granular soils beneath Units 1, 2, and 3 are presented in Figure 5.4.3.2-4.

A summary, of shear strength'est results.is presented in Figure 5.4.3.2-5~96 E r I 1 1 L'J!

5.4.3.1 La er Desc i tion To determine representative engineering properties, the subsuiface profile has been subdivided into three soil depth zones representing different dispositional environments and generally exhibiting different engineering characteristics.', For discussion purposes, these zones are defined as the upper zone (0 to 30.feet), intermediate zone (30 to 55 feet), and lower zone (55 to 300 fe'et).These depth zones correspond approximately to the following geologi:c lithozoners and stratigraphic, members presented on the geologic profiles and maps of excavations:

Stratigraphic D'e th Zone feet Upper (0 to 30)Intermediate (30 to 55)Lower (55 to 300).Geolo ic Lithozone Upper LZ5 Lower LZ5 (Transition)

I.Z4 and LZ3 Members A and B C,D, and Upper-E,F,G,H,I,J

&K I The upper zone contains granular soils deposited in a high energy environment.

Such deposits primarily consist of relatively well-graded silty and clayey sands with some fine gravel.Relatively uniform, fine, and medium sand layers are.also present, to a lesser extent.With the exception of the upper 2.or 3 feet which are generally loose, the deposit is gener'ally medium dense to dense.Zones of caliche cementation.are common.The intermediate zone represents a,gradational interface between the upper coarse-grained pluvia deposits and the underlying, fine-grained lacustrine deposits.It consists'f crudely'I stratified clay, silt,, and san'd layers of limited lateral extent.The clays are generally medium plastic, hard and exhibit extensive ca'lareous cementation.'radational mixtures 95 I I f Q~I'KaYmZ CWRD MAJOR SOIL~TYPES

SUMMARY

OF';,SOIL PROPERTIES AISO PyEI7hbl<0>~pe=.ture Cgc.g OEPTH LITHO.b GENFRALIZEO He<0 ZUrtE LITHOLOGY OEPTH ZONE STRATIGRAPHIC MEMBEll OESCRIPTIONS SYMBOLS Ory Unit Moisture VrciSht Content toe 0 INI Vcid Ratio Oco:ce Sp df;a aber Gailry ol".al DESIGN SHEAR STRENGTH PARAMETERS C ILstI Oistl u c ItsH EXPLANATION 20 40 f;-f:.','.jjjYi,;

'Lc~~crc3vn RI tv""~I i UPPER INTERMEOIATE C D upper P lover E SiLTY SANO CLAYEY SANO occrfoaal Sravets.Intcrtsyercrd SILTY CLAYS, SILTY SANOS, CLAYEY SAtlOS;>>ith Sradational mixtvrcs ot tine sands, tSr sad days.SILTY CLAY;occaional leases at sandy silt.clayey silt and sSty sand.SM SM4t M CL,CH 106 t06 10 98 027 0.59 19 37 2.70 87 I 22 I 039 0.58 97 0.65 92.66 2.71 26 0.42 0.73 97 36 36o 15o 20 20o 1.2 5.0 4 Ocpth below criffnal native Sround surface t I b Refer to Setisfis proRtss, Fitvres 7.8-54 Urovth 2.5-48.c Refer to ditcurionin tccGon 2$.42.1.c LITHOLOGIC SYMBOLS'.;i'~c;,":.,ie GRAVELLY SAND 80 100 120 140 200 220 I I~i i i i I i~1 LOV(ER.G FINE StLTY SANO4AIIOY SILT aad CLAYEY SANO4ANOY CLAY.SILTY CLAY;occasiond day ay silt Mnscs.flttE SILTY SAtt04*NOY SILT snd CLAYEY SAN04ANOY CLAY SILTY CLAY.FINE CLAYEY SANO4ANOY CLAY and SILTY SAN04ANOY SILT.SM41L.SC CL CL.CH GM4IL, SC.CL CL SCIL.SM4IL 99 25 06 26 0.43 0.76 93 98 26 042 073 97 222 21 0.37 058 107 2.vs I a8 101 25 0.41 0.68 100 222 5.0 ScR types cre detiacd in accordance wild sts UniSied Sol Clari'.icstian System.Oval dsri".icatiors indicate border linc ms(crids.Movtvre Contents and saturation above the pcrchcd wsa.level werc determined utiaS samples obaited from cuter torinSs drilled>>ith no drBIfnS Ovid.Escept whcrc other>>ra noted, mcrrvrc contrast prcnsc3y dcunuincd froin samples obtisncd bdov, ttc water taMt from rotary wash borintp.Some at the fsw deyees al sat vatisn observed in Sranutar scil: br law ate iiatrr table may ts due to thc ineviatls moisture lares dr~shit am pit hand.lipS.sv'~pi'r."i CLAYEY SAND SANDY CLAY g cmv;-'.bwv>SI Sl L.TY SAND SAiiDY SILT SILT 240 260~i i i SILTY Ct.AY.=.9 25 0.41 0.7i 100 2.jl 9 Insutficieat cr no data I SILTY CLAY CLAY:" Y SILT 280 300 320 CLAYEY SANO4ANOY CLAY, StlTY SANO;occasional Sraveh.SCIL.SM 108 21 340 I-360 l)O M,N,O,P ROCK.Figure l 5.I'4.3.2-1 SUI"IIIARY OF SOIL PROPERTIES V 97 9 011 0 5 02 07i>>.y f L~I ,)

rtA M~&Ib i R IUU I ION wtel lk C~I~lo 4~'1'I~3 100 90 I-80 U, vo~.eo QJ 60 z.40 I-30 z O 20 10 GRAVEL SAND E NUMBERS 20 40 60 100 200 U.S.STANDARD SIEV 1 1/2" 3/4-3/8" 4'10 I I i 1 I I I I Co Fine 0 r1 Medium I F n FINES (Silt or Clay)HYDROMETER 4 y>Iwf.N~>.vt;10 5, GRA 0.6 0.1 0,06'.01 0.005 0.001 0.0006 IN SIZE'IN MILLIMETERS 4 60 50 X Lu 40 O z 30 0 I-CO 2O/PLASTICITY CHART A SIGNIFICANT PORTION OF SOILS ARE NON PLASTIC~CH CL~e 10 0 J~Mt.ML CL I~4 P ML 5OL MH Bt OH 0 10 20 0 40 50 60 70 80 , 90 100", LIQUID LIMIT (A)ILTY ANO"LAYEY SANDS (SM, SC, SM SC, SP SM)STRATIGRAPHIC MEMBERS: C, 0,&Upper E TYPICAL DEPTH RANGE: 30'55'igure 5.4.3.2-2 (Sheet 1 of 4)GRAIN SIZE AND PLASTICITY

SUMMARY

INTERMEDIATE ZONE 98 G RAIN SIZE DISTRIBUTION

~tan c~sa+w+~s e~GRAVEL SAND FINES (Silt or Clay)Co ine oars Medium I ne 90 U.S.STANDARD SIEVE NUMBERS 3" 1 1/2" 3/4" 3/8'10=20 40 60 100 200 ,l)(I HYDROMETER I!Il I!1 80 7o I I 4o I-30 CJ CC 20 10 0 yh 10 5 1 06 0.1 0.06 GRAIN SIZE IN MILLIMETERS 0.01 0.005 0.001 0.0005 60 50 40 X O Z 3O'I-V)2O 10 PLASTICITY CHART A SIGNIFICANT PORTION OF SOILS ARE NON PLASTIC CH CL MH&OH 0 Ct.+ML 0 10 20 ML 8(OL 30 40 50 60 70 80 90 100 LIQUID LIMIT (B/FINE SILTY SANOS-SANOY SILTS (SM ML, ML)STRATIGRAPHIC.

MEMBERS: C, 0, B Upper E TYPICAL OEPTH RANGE': 30'55'igure 5.4.3.2-2 (Sheet 2 of 4)GRAIN SIZE AND PLASTICITY

SUMMARY

INTERMEDIATE ZONE 99

GRAIN SIZE DISTRIBUTION welt IOL lijltlWt4 llltfe GRAVEL SAND 0 inc, 0 Medium'ne U.S.STANDARD SIEVE NUMBERS~3" 1 1/2" 3/4" 3/8" 4 10 20 40 60 100'00 FINES (Silt or Clay)HYDROMETER 80 UJ 70~eo=.5,~~It 6.3 K~>I-30 R CJ uj 20.0'4 HA@'t 10,6 r 0.6 0,1 0,06 GRAIN SIZE IN MILLIMETERS 0.01 0.006 0.001 0.0006 60 PLASTICITY CHART, 50 40 ,X O Z 3O 0 Vl>2O 10,~ML ML CL~CL ML&OL CH MH&OH 10 i 20 30 40 50~60 70 80 90 100 V LIQUID LIMIT (C)CLAYEY SANOS-SANOY CLAYS ISC CL)STRATIGRAPHIC MEMBERS: C, 0,&Upper E TYPICAL OEPTH RANGE: 30'55.Figure 5.4.3.2-2 (Sheet 3 of 4)GRAIN SIZE AND PLASTICITY

SUMMARY

INTERMEDIATE ZONE 100

GRAIN SIZE DISTRIBUTION

~i~l0%CEklbtM~Iti lo GRAVEL SAND 0 inc o Medium n U.S.STANDARD SIEVE NUMBERS 3" 1 1/2"3/4" 3/8" 4 10 20 40 60 100 200 FINES (Silt or Clay)HYDROMETER Qo 80 ro z 40 I-30 CJ K 20 CL 10 10 6 0.5 0.1 0.05 GRAIN SIZE IN MIILIMETERS 0.01 0.005 0.001 0.0006 60 PLASTICITY CHART 50 40 X O z 3O O th I-0~2O 10 0~ML CL~I CL~~ML&OL CH OH 0 10 20 30 40 60 60 70 80 90 100 LIQUID LIMIT SILTY CLAYS (CL.CH)E STRATIGRAPHIC MEMBERS: C, 0,&Upper E TYPICAL DEPTH RANGE: 3I'55'igure 5.4.3.2-'2 (Sheet 4 of 4)GRAIN SIZE AND PLASTICITY SUIIMARY INTERMEDIATE ZONE 101

GRAVEL~eo aa asovv av I~SAND F INES (Silt or Cl)y)US.STANDARD SIEVE NUMBERS 3" 1 1/2" 3/4" 3/8" 4 10 20 40 60 100 200 HYDROMETER QJ 30 10'lo 5 1 0.5 0.1 0.05 GRAIN SIZE IN MILLIMETERS 0.01 0.006 0.001 0.0005'eo PLASTICITY CHART 40 X 0 Z 3O O>20 10 CL~~~~~CH MH&OH~ML CL 7 ML ML&OL 0 20 30 40 60 60 10'LIQUID LIMIT 20 80 Oo (A)SILTY CLAYS (CL, CH)'\STRATIGRAPIC NUMBERS: Lower E&G TYPICAL DEPTH RANGE: 55'-70'75'160'igure 5.4.3.2-3 (Sheet-1 of 6)GRAIN SIZE'AND PLASTICITY

SUMMARY

LOWER ZONE 102 t I (i

'\3 rIHIIV oi LC LJ IO I 0 I DV I IDIO<<0~W, 41VS~~I~GRAVEL In SAND Medium Fn FINES (S ll or Cloy)100 I.U.S.STANDARD SIEVE NUMBERS 3" 1 1/2" 3/4" 3/8" 4 10 20 40 50 100'00 HYDROMETER 50 I-X 50 U uI 70>~, so CC III 60 z II.O j IX: 0 10 b rb i l'L'10 5 1 0.6 0.1 0.05, 0.01 0.006', GR'AIN SIZE IN MILLIMETERS 0,001 0.0006 PLASTICITY CHART 60 X 40 O z 3O 0 l-2O 10 0~i(8 I.-C I.l7 ML CL ML&OL MH&OH 0 10 20 30 40 60 5Q 7Q 80 90 100 LIQUID LIMIT (B)FINE SILTY SANDS-SANDY'SILTS (SM4lL, SC CL), STRATI G RAP IC NUMSE RS: F TYPICAL DEPTH RANGE: 70'-75')Figure 5.4.3.2-3 (Sheet 2 of 6)GRAIN SIZE AND PLASTICITY SUGARY LOWER ZONE 103 1 l I KCITPRM&l~RKTRZ53tKR~

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25 25 20 15 6 I b o IQ 0 0 EFFECTIVE SHEAR STRENGTH IH SITU SAHOS 6'~36 Ci 0 5.10 15 20 CFI'+(F3 p'i-(XSF)2 25%0 354 20 15 b cv~10 0 0 EffECTIYE SHEAR STRENCTH 6ACXFll.t.

S'~36'~0~~15.20 25 p'(XSF)2 10 35 20~-60 I O 80 100 120 UNORAIHEO SHEAR STRENGTH IN SITU CLATS S~O'~5.O~0~<~~~~~~~~~~~0~25 25 4 IAO 0 6 12 OHORAIHEO SHEAR STREHGTH (XSF)20~44 hC Ic b b 10 Cf f S'44/c%NEAR STRENGTH IH SITU CLATS 6~20'~1.2'r~~~~C~20 44~44 lC 15 b 10 TO 2 A..Ah STRENGP IH SITU CI,ATS S>15'*2.0~~~~~~~~~SI APERTURE CARD Also Available On Aperture Card~~10 15 20 01+(F3--(XSF)2 25 30 15 20 25<I-CF3 P=-(XSF)2 35 40-I 45 SHEER STRENGTH

SUMMARY

Figure 5.4.3.2-5 109 902105 0207 1 pl

6.0 METEOROLOGY

PVNGS is located in southwest Arizona, a region characterized by a desert type climate.This area, which is in the intermountain plateau climatic zone, is in the driest region of the United States.Typical charac-teristics.

of this'large, arid region include abundant sunshine, infrequent precipitation, low relative humidities, large diurnal temperature ranges, moderate wind speeds, and an occasional intense summer thunderstorm.

The summers are hot and the winters are mild.6.1 T es of Air Masses The air masses that dominate the Arizona region are mostly continental

'n nature.Although the Rocky Mountains to the north normally prevent cold Canadian air masses from penetrating into Arizona in the winter, occasionally these'ir masses can influence the weather in the entire state.However, the cold air is somewhat modified if it reaches the central-southwest Arizona area.Air masses approaching from the Pacific Ocean are moist and mild initially on the west coast, bu" are substantially drier when they reach Arizona because of orographic effects when encountering the Sierra Nevada mountain.ranges west of Arizona.Hoist, tropical air can penetrate into Arizona from the Gulf of Hexico southeast of.the state, and more rarely from the southwest.

off the west coast of Mexico, providing the moisture sources for summer thunder showers and the heaviest precipitation episodes.6.2 Tem erature and Humidit Average temperatures through the state are dependent on the elevation and latitude.Great extremes occur between day and night temperatures throughout Arizona.The daily range between maximum and minimum temperatures sometimes runs as high as 50'.to 60'.during drier 110 portions of the year.Thewarmest.weather in Arizona usually*occurs during E the last week of June and the firse.two weeks'n July.The site area normally experiences temperatures above 100'.in the mid-afternoon in the summer and experiences relatively mild winter temperatures.

Harsher winter temperatures characterize the northern, most mountainous portion of the t state.Based on the period 1941'to 1970, the normal maximum and minimum temperatures at Phoenix are 64.8'.and 37.6'.in January (the coldest month)and 104.8'.and 77.5'.in July (the warmest month).The annual L mean temperature is 70.3'.The mean number of days per year with maximum temperature of 90'.and above is 165.The mean annual number of days with a min'imum temperature of.32'.and below is 12.There has never been'below zero reading r'ecorded in Phoenix.Seasonally, the highest relative humidity values in Arizona are obseived (in winter and the lowest values in summer, but when unusually moist tropical.air enters the state from the Gulf of Mexico, high relative humidities can'=occur during July and August.During the period late spring to fall, relative humidities of 10%or lower are recorded in the mid-afternoons'n the southwestern desert regions.At Phoenix, the lowest relative humidities are found in the afternoon r hours, c'orresponding to the maximum daily temperature readings during that~time.The highest relative humidities at Phoenix occur shortly before sunrise, corresponding with minimum temperature readings.The mean annual average humidity value at Phoenix is 36%, based on four observations per day.111 e

6.3 Preci

itation The state normally experiences two wet seasons.The summer wet season occurs during July and August, which are the wettest months in all parts of Arizo'na.The winter wet season extends from November or December through the middle of March.The severity of a drought is difficult to assess in southwest Arizona because of already existing extreme dry conditions, May , and June are the driest months, especially in the desert-type climate of the site region.The heavier summer precipitation is associate'd with thundershower activity induced primarily by a flow of moist tropical.air from the Gulf of Mexico.Record precipitation'amounts in the state have occurred in August and September from tropical flows of moist air from the Gulf of California and Pacific Ocean associated with tropical depressions and hurricanes off the west coast of Mexico.Winter precipitation is generally widespread over the state and is normally of light or moderate intensity.

Greater amounts occur in the higher latitudes, on exposed southwest slopes, and at higher elevations.

Winter precipitation is heaviest when the middle latitude storm track is unusually far south, so that storms enter Arizona directly from the west or southwest after picking.up considerable moisture from the Pacific Ocean.The mean number of days of precipitation of 0.01 inch or more at Phoenix is 34, based on 38 years of data.The normal annual rainfall at Phoenix is 7.05 inches.Snow rarely falls on the desert floor in the site region, but when it does, the snow usually melts almost as soon as it contacts the ground.At Phoenix, trace amounts have been recorded in December to April, with 0.6 inch of snow the maximum monthly recorded amount.Monthly and annual extreme precipitation by time interval are presented in Table 6.3-1 for PVNGS for the 5 years of onsite data.It indicates that, for the 5 years, the extreme 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> precipitation was 0.89 inch and occurred in August 1978.The extreme 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> precipitation was 1.95 inches'h and occurred in September 1974.During the 5 year period, there was only"one hourly occurrence of precipitation when the ambient temperature was less than or equal to 32'.112

Table 6.3-1 PVNGS MONTHLY AND ANNUAL EXTREME PRECIPITATION (INCHES)BY TII1" INTERVAL (AUGUST 13, 1973, TO AUGUST 13, 1978)1 Time.Interval-(Hours)Month 12 18 24 August September October'ovember December January February March April May June July 0.89 0.52 0.52 0..19 0.10 0.35 0.28 0.35 0.17 0.24.0.07'0.27 0.92'.92 0.68 0.43 0.39 0.69 0.60 0.60 0.22 0.24 0.14 0.53.0.92.1.95 0.68 0.57 0.59 0.71 0.60 0.83 0.22 0.24 0.14 0.89 0.97'.95 0.68 0.65 1.03 l.95 0.68 0.65 0.60 0.66 0.83 0.83 0.22 0.24 0.14 1.16 0.22 0.24 0.14.1.30 0.65 0.65 0.78 0.78 Annual 0.89 1.92 1.95 1.95 1.95 113 1 t)

7.0 HYDROLOGIC

DESCRIPTION The site.is on a desert valley plain near a'idge separating the drainage basins of the Hassayampa River and Centennial Wash.Both are ephemeral desert'streams which flow only with.rainfall-ru>>o"f.These streams are tributaries of the Gila River, which drains most of'the southern halE'of Arizona.Other local water courses include Winters Wash and a wash draining a narrow'trip extending a few miles north of the plant site.Figure 7.0-1 shows the locations of rivers and washes relative to the site.There are.no dams on East Wash, Winters Wash or the Hassayampa River.There are se'veral small detention dams on Centennial Wash, the'argest being a.low'eaithfill dam about 45 miles upstream Erom the site, which has a capacity of about 100 acre-feet.'here are several large water storage dams on the Gila River system upstream fr'om the site.The locations of these dams are shown in Figure 7.0-2.Data on these dams are presented in.'Table 7.0-1.7.1 Flood Historv C The U.S.Geological Survey(USGS)op'crates a water-stage recorder on Centennial Wash that gauges the runoff from 1,810 square miles, and a flood hydrographic recorder on Winters Wash that gauges the runoff from 47.8 square miles.The Centennial Wash, gauge datum is 773.22 feet above msl and is obtained by u'se of a water-stage recorder.The base discharge is 1,000 cubic feet per second, with the flow regulated by several small detention dams.The Winters Wash gauge is a flood-hydrograph recorder located at 1',080 feet msl.The base discharge.

is-100 cubic feet per.second, with neither storage nor diversion above the station.114

'~~~~~'

)9es ee ki,a lao'I alii~SOS).S So 2 Ileavef Cf$0$)S Svs)i$094>a)94)'lear Were$01$4"$011~~SI)$)94$e o a io ai)9)S on c'do CS*a4 SISS X i, o ee S I 24 L$019 4 4~~(Verde)09)Sl)v H SI JS a r$1)V)S$04$)II)4 SI 00,1 I 0 4 SIOI Ivv,4 o o C 0 Ii I G,a slol.s SI 0)E~SO IV C 0 SI 2 I$I)e SI I)$020 I I~lleia'VIS Sl"l9'I~/S Sl)4 a$09'I (I', Sl)4.4~)IVV<<4 e)44 e,)44 1 e9vv 4 919 A r e 919,~Aoii~e re II I a)e e94$r.d ii n r a 491$ns a 4914 1920~9$0~90$e940 I94$er~1)i e9 e)OS e)eO e(, Sna Cae e,an~44$Sl'94 1 Sl'1$I:iiv 4 SI9$Vp eo'Iv~19$Ceo paean~1$0 I'I eo A\49li e49$Saii Carloi Ae~ervoir e~4$ir e ee el$$elv~1)$<ra~e~i~LEGEND X PLANT SITE A COOLIDGE DAM B ROOSEVELT DAM C HORSE MESA DAM D MORMON FLAT DAM E STEWART MOuNTAIN DAM F HORSESHOE DAMi G BARTLETT DAM H WADDELL DAM I MCDOWELL DAMSITE GAGING STATIONS 1 CENTENNIAL WASH NEAR ARLINGTON 2 WINTERS WASH NEAR TONOPAH 3 HASSAYAMPA RIVER NEAR MORRISTOWN 4 GII.A RIVER BELOW GILLESPIE DAM NORTH 10 0 10 20 30 40 MILES SCALE 22v Y4!gveayl Palo Verde Nuclear Generating Station IaOCATIONS OF DAMS AND GAGING STATIONS Figure 7.0-2 116 t

~~~~~~~~I~I I~~~I~~~I I~~I~~~~I~~

I 1 For the period of record (1961'1977), maximum recorded discharge in Centennial Wash was 14,500 cubic feet per second on July 31, 1961.Maximum recorded discharges in Winters Wash for the period of record (1962-1977)was 3,640 cultic feet per second on September 25, 1976.Tables 7.1-1 and 7.1-2 give the peak discharges recorded for Centennial Wash and Winters Wash, respectively.

Maximum recorded discharge of the Hassayampa River, as recorded by a crest-stage recorder located near Morristown, Arizona (whicn gauges the runoff fr'om 774 square miles), was 47,500 cubic feet per second on September 5, 1970.The period of record for the gauge near Morristown includes the water years 1939-1947, 1954, 1956 and 1964-,1977.Table 7.1-3 gives the~peak discharges recorded for the Hassayampa River.The datum of the gauge is 1831.16 feet above msl.From October 1938 to June 1947, data is from the water-stage recorder;from June 1947'to November 1963, there is miscellaneous data only.There are annual peaks for 1947 and 1964-1965 only.Maximum observed discharge'f the Gila River, at the USGS gauging station below the Gillespie Dam (which-gauges th'd runoff from 49,650 square'miles), was,85,000 cubic feet per second on December 28, 1923.The period of record for the Gillespie Dam gauge includes the years 1921 to 1977.(A maximum, discharge of 250,000 cubic feet per second'was estimated to have occurred in February 1891 at the Gillespie damsite.)Table 7.1-4 shows the peak discharges recorded for the Gila River below Gillespie Dam.118 I l (1 I I I 1 Table 7.1-1 P CENTENNIAL WASH NEAR ARLINGTON, ARIZONA.Water'Year Date Gauge.Height'(ft)

Discharge (ft3/s)1961 1962 1963 July 23.1961 July=29;1961 Sept.6, 1962 4.70.3.71.3.09 14,500 3,870',110 No flow 1'9 64 1965 1'966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 July 31, 1964 Feb..7, 1965 Sept.13.1966 Sept.5, 1967 Dec.19, 1967 H Aug.29, 1969 Sept.5, 1970 Aug.20, 1971 Oct.7, 1972 Aug.4, 1974 Oct.28, 1974 Sept.26, 1976 3,.74.3.27 4.13 3.27 4.11 3.25 4.71 3.91 4.52~2.93 3.55 4.38 2,890 1, 040 5,500 1,040 5,330 990 11,900 2,040 No flow 9,340 105 7557,800 No flow a~Partial water year-started Jan'uary 1961.119

Table 7,1-2 WINTERS WASH NEAR TONOPAH, ARIZONA (Sheet 1 of 2)Water Year Date Gauge Height (ft)Discharge (ft3/s)19 62'963 1964 1965 1966 1966 1967 1968 1969 1970 Sept.5, 1962 Sept.3, 1963 Aug.1, 1964 Aug.1964 Aug.1964 Aug.1964 Feb.7, 1965 Aug.14.1965 Dec.10, 1965 Sept.13, 1966 Sept.3, 1967 Dec.19, 1967 Nov.15, 1968 Aug.29, 1969 Sept.13, 1969 Mar.2.1970 Sept.5.1970 5.67 6.00 5.89 4.56'.91 5.20 4.96 4.91 6.11 6.86 6.2 5.68 4.37 4.28 5.15 776()100(680 850 790 250 800 470 390 3 8'0 900 1,350 960 700 180 150 48G a.From floodmarks.

b.Annual peak prior to installation of gauge.c.Estimated.

120 Table 7.1-2'I WINTERS WASH NEAR TONOPAH, ARIZONA (Sheet 2 o'f 2)Water Year Date Gauge Height (ft)Dms'charge

('f t3/s)1971 1972 1973 19 7 4 1975 1976 1977 Aug.20, 197 1, Aug.12, 1972 Oct.6, 1972 Mar.20, 1974 Oct.28, 1974 Sept.25, 1976 Aug.16, 1977 5.10 4.70 5.80 4.'0 4.2 10.1 1, 000*795 2,100'900 560 3, 640(c),~121

P Table 7.1-3 HASSAYAMPA RIVER NEARMORRISTOWN, ARIZONA'Sheet 1.of 3)Water Year Date Gauge Height (ft)Discharge (ft3/s)1939 1940 1941 Apr.Qpr.11, 1941 15, 1941 July 24, 1941 Aug.9, 1941 Aug.29, 1941 Dec.20, 1938 Sept.4..'1939 Sept.6.1939 Sept.12, 1939 Feb.l.1940 Oct.5, 1940 Dec~24, 1940 Feb.25, 1941 Mar.2, 1941 Mar.5, 1941 Mar.14, 1941 7.30 6.6 8.7'6.5$5.9 7.18 7.30 6.96 8.36 6.66 7.90 7.57 7.05 7.50 7.73 7.27 2,700 1,240 6,200 1, 600 160 2,460 3,350 ,2,600 6,100 2,.040 4,060 3,020 1,320 2,110 3,460 2,050 1942 Aug.5', 1942 5.7'00 a.From high water marks in well.b.From floodmarks.

122.

t Table 7.1-3 HASSAYAMPA R'IVER NEAR MORRISTOWN, ARIZONA.'Sheet'of 3)(1).(2)Water Year'ate Gauge Height.(ft*)

Discharge (ft3/s)1943 , 1944 Aug.'3, 1943 Aug.14.1943 Sept.26, 1943 Oct.'0,'1943 Feb.24,'1944 9.9 8.52*6.80 7.68 7'2 7,700 3,800 1.200 2,420 1,510 1945 1946'Only mis 1947 Aug.9, 1944 Aug.2, 1945 Aug.10, 1945 July 22, 1946'ug.11, 1946 Sept.17.1946 cellaneous record Ju Aug.8, 1947 E 8'.10'7.55 6.98 7.38 7.50 7.60 3., 520 2, 200 1, 110 1~-.1',510 2,090 2,310 6, 000 ne 1947 to Nov.1963 8,95(a)1954 1956 1964 1965 1966 1967 July1964 Sept.2, 1965 Dec.10, 1965 Dec.30, 1965 Sept.13, 1966 Sept..1967 1O.5O(a).1O.15(a)1O.1(b)9.77..9.41 10.03 8.75 4,000 9,280 2,700.2,000 3,210 1,150 123 I i Table 7.1-3 , HASSAYAMPA RIVER NEAR MORRISTOWH, ARIZONA'Sheet 3 of 3)(1).(2)Hater Year Da te ,Gauge'.Hej.ght (f t)Discharge (ft3/s)1968 1969 1970 1971 1972 1973 1974 1975'976-1977 Dec.19,'967 Sept~13, 1969 Mar;2.1970 Sept.5.1970 Aug.18, 1971 Aug..27, 1972 Oct.7, 1972 July 20, 1974 July 29, 1975 Feb.9, 1976 Aug.15, 1977 10.61 8.15.9.05 19.05 9.07 6.67 7.81 7.30 7.27 8.34'.08 4,800 650 1, 500 47,500 2000 700 2,000--650 50 800 1,600 124" t j Table 7.1-4 GILA RIVER BELOW GILLESPIE DAM, ARIZONA (Sheet 1 of 5)(2.)Water, Year Date Gauge Height (ft)Discharge (ft3/s)1891 No record 1891 1921 1922 1923 1924 Datum chan e 1925'926 1927 Feb.1891 to 1921'ug.22, 1921 Jan.4, 1922 Sept.20, 1923 Dec.28, 1923 Apr.Apr.8, 1926 21, 1926 July 27, 1926 Sept..Sept.9, 1926.30, 1'926 Dec.8, 1926 Dec.15, 1926 Feb.18,.1927 Mar.12,'927 Mar.17, 1927 Sept.13, 1927 Sept.2.1925 Sept.6.'1925 Sept.20, 192S I Oct.6,=1925'ec.: 4, 1925 Mar.31, 1926 3.25 3.67 2.00 6.00 0.68 1.73" 2.23~1;28 0.72 0.88 3.15 1.02, 0.87 ,1.05'3.95 1.84 0.68 5.45 1.04.0.81 3.71 250,000 26,800 32,'700 13,100 85,000 2,500 9,570 15,200 6,160 2,700 4,060 26,700 4,760 3,520'4,620 38,300 10,600 2,500 67,300 4,560 3,160 , 34.900 a~b,.Gauge height affected by.d'rawdown due to open sluice gates.Approximate discharge with sluice gates open.125

Table 7.1-4 GILA RIVER BELOW r GILLESPIE DAM.ARIZONA (Sheet 2 of 5)(2)Water Year, Date Gauge Height (ft)Discharge (ft3/s)1928 Feb.Aug.Aug.6, 1928 3, 1928 29,,1928 1.70 1.26 0.70 9;220 5.600 2,350 1929 1930 1931 1932 Datum chan e 1933 1934 1935 Apr.6','1929.Aug.Sept.19.1929 5, 1929 Feb.Feb.Mar.11, 1932 20, 1932 3, 1932 Mar.12, 1932 Mar.22, 1932 Oct.9, 1932.Aug.Feb.Feb.Mar.30, 1934 10, 1935 17.1935 17, 1935 Aug.25, 1935 Sept.1, 1935 Sept.26;1929 Mar.19, 1930 Aug.10, 1930 Feb.16, 1931 Aug.6, 1931 Aug.12, 1931 Aug.31, 1931 Oct.3, 1931 Dec.11, 1931.2.74.r 0.60 0.88 1.15 , 0'2 2.19 2.50 1".20 1.45 1.41 0.73 1.00 4.47 1.78~1.65, 0.67 0.92 5.70 5.88 6.60 5.73 6.06 5.84 5.71 20,700 2,050 3, 680 5, 210 3,160 13,900 17,500 5,470 7,530 6,930 2,36,0 3, 690 44,500 9, 670 8, 260 2,090 3,270 2, 180 3,100 7,470 2,240 3,890 2,380 2,140 126

Table 7.1-4 GILA RIVER BELOW GILLESFIE DAM, ARIZONA (Sheet 3 of 5)(2)Water Year Date Gauge Height (ft)Discharge (ft3/s)1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 July 29, 1936 Feb.9, 1937 Feb.17, 1937 Mar.16, 1937 Mar.19.1937 Mar.5, 1938 Aug'0, 1939 Sept.5, 1939 Sept.13, 1939 Aug.19, 1940 Jan.4, 1941 Feb.10, 19'4l Feb.,16, 1941 Feb.1.9, 1941 Feb.24.1941 Feb.28, 1941 Mar.5, 1941 Mar.16, 1941 Apr.5, 1941 Apr.18, 1941 May 5, 1941 Aug.12, 1941 Dec.13, 1941 Aug.5, 1943 Feb.25, 1944 Aug.14, 1945.Sept.19, 1946 Sept.24, 1946/5.90 8.43 7.67 6.00 7~77 9.95 5;70 2.43 5.97 5.87 6.16 5.68 5.44 5.65 6.57 6.70 7.07 9.45 5.95 8.08 7.05 5.43 5.30 5.75 5.29 5.53 5.85'.92 3,240 45,800 18,400 4.520 21,300 60,000 2.200.2, 500 3,240 2,620 5.850 l.910 1, 040 1,800'7,180 7,250 10,800 45,800 3,060 25,300 10,600 1,010 580 2,200 580 1,350 4,290 2,880 127

Table 7.1-4 GILA RIVER BELOW'GILLESPIE DAM, ARIZONA (Sheet 4 of 5)(2)Water Year Date Gauge.Height (ft)Discharge (ft3/s)1947 1948 1949 1950 1951 19,52 1953 1954 Aug.Jan.Nov.Aug.28, 1951 22, 1952 20, 1952 12.1954 Aug.9, 1947 Aug.9,'1948 Aug.7, 1949'ct.19.1949 July 28, 1951 Aug.4, 1951 5.63 5.23 5.42 5.56 5.96 7.55 5.23 5.10 5.64 4,390 330 976 1.460 , 2,340 2,880 16.600 430 115 1,760 1955.1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 July 25, 1955 Aug.8, 1955 Aug.14, 1955 Aug.28, 1955.Jan.29, 1957 Sept.13, 1958 Aug.17, 1959 Jan.19, 1960 July 23, 1961 Oct.4, 1962 Aug.14, 1964 Sept.4, 1965 Dec.30, l965 Jan.2, 1966 10.56 10.70 11.05 10.82 10.14 10.40 10.22 10.31 10.21 10.09 10.15 10.07.10.52 16.1 1.870 2, 240 3,420 3,660 No flow 205 976 480'40 380 No flow 100 230 230 1,600 64,200 128

Table 7.1-4 GILA RIVER BELOW (2)GILLESPIE DAM, ARIZONA (Sheet 5 of 5)Water Year Date Gauge, Height (ft)Discharge (ft3/s)'19 67 1968 1969 1970 1971 1972 1973 1974 1975 1976.1977 Jan.8.1966 Feb.16, 1966 Sept.15, 1966 Sept.6, 1967 Dec.12, 1967 Dec.26, 1967 Feb.19, 1968 Mar;.2.1968 Ma'r.15, 1968 Aug.30, 1969 Sept.6;1970 II Aug.27, 1971 Oct.7.1972 Oct.22, 1972'Jan.2.1973 Mar.1;1973'Apr.3,.1973'pr.18, 1973 May 3, 1973 May 10, 1973 May 14, 1973 Apr.3.1974 Oct.29, 1975 Sept.27.1976 Apr.'5, 1977 12.27 10.48, 10.40 lo.41 11.09 11.01 10.47 10.50 10.43 10.04 ,11.26 10.34 10.60 10.48 10.55 10.40 (a)12.20 11'.37 1O.65(')~11.20 10.42 1.62, 1.79 10.51 10.04 12,200 1,720 1.340 1.390 5,710 5,240 1,720 2,130 1.480 214 6,180 1,090 No fl'ow 2,340 1,720 2,080 1,340 (b)18,000 (b)13,000 ,6,ooo (b)10,000 5,ooo 59 80 1, 920 100 129 I

7.2 Offsite

Flood Desi n Considerations The plant site is not susceptible to flooding by the Gila River, the Hassayampa River, or the Centennial Wash.The nearest approach of the Gila River to the site is 6 miles to the southeast; the probable maximum flood state of elevation 776 is 175 feet below the lowest plant grade of 951 at Unit 3.The Hassayampa River is 5 miles to the east, with a high-water level of elevation 942.A topographic ridge between the plant site and the Hassayampa River (minimum elevation 975)provides a natural barrier against site flooding from the Hassayampa River.Centennial-Wash is approximately 5 miles south of Unit 3, with a probable maximum flood le'vel of elevation 888.The only drainage affecting plant design is from, nearby offsite sources and from onsite sources.Potential offsite flooding sources are East Wash and Winters Wash.Since these washes have no reservoirs upstream from the plant site, flooding could occur only from precipitation.

Protection of safety-related

., facilities

'from inundation by offsite flood sources is achieved.by the location of the facilities beyond the extent of flooding.East Wash has been realigned to flow past plant facilities along the east boundary of the site, 7.3 Onsite Flood Desi n Considerations The site is subject to potential flooding from East Wash and Winters Wash.Flood protection is achieved by site grading such that all Seismic Category.I facilities will be located beyond the extent of the Probable Maximum Flood (PMF).The ground elevation along the west.side of the site is raised to limit the extent of PMF on the site.A maximum of about 10 feet of compacted.

fill was placed in the cooling'tower areas, such that ground between the peripheral road and the power block areas will be above the PMF levels.A drainage channel designed to carry 50 year flood flows" will convey.flood waters from the northern portion of the site, west of the peripheral road to a discharge point south ofthe power block area.130

• 'I East Wash has been realigned along the eastern edge of the site to maximize use of the site for other facilities and to limit the extent.of the PMF The normal channel of East Wash has been blocked by an embankment between the two hills on the northern edge of the site.This embankment forces flood flows around the small hill i-..the northeast corner of the site and cuts off any flow through the'old channel.An additional embankment has been constructed

'along the eastern edge of the site to prevent flooding of the site.proper.Both embankments are constructed to elevations sufficient to prevent any over topping by a PMF and associated wave runup and wind setup.The East Wash embankments have been constructed of material excavated from the reservoir and power blocks.The elevation of the north-'acing embankment"is approximately 983 feet msl to meet existing contours at the southern end.The embankments are designed to withstand static and dynamic effects of floods corresponding to the PMF.The outer faces of the embankments are protected from erosion by providing a riprap zone.8.0 GROUNDWATER The site area (5 mile radius)is in the lower Hassayampa-Centennial groundwater basin.This basin encompasses an area of about 400 square miles, The hydrogeologic profile of the site area is defined by three major sedimentary" units, each having distinctly different lithol'ogic, and hydrologic characteristics.

These units, found in most Central Arizona water basins are identified herein as:~Upper Alluvial'nit

~Middle Fine-Grained Unit~Lower Coarse-Grained Unit The generalized hydrogeologic Figure 8~0-1.A description groundwater regime of the site profile of the site area is depicted in of the sediments as they relate to the is presented in the following paragraphs.

131 t 0 SI APERTURE CARD r<<Also Available On A.per tore Card EXPLANATlON NORTH 1200 SITE BOUNDARY SITE BDUHOARY SOUTH L I THOLOG I DESCRIPT IOHS t UPPER ALLUVIAL UHIT SILTY AND GRAYELLY SANDS, WITH SOME SILTS ANO CLAYS (LZ-5)"IOOLE FIHE GRALHEO UHIT (AOUITARO) 1000 800 600 Coo 20D Cl I tv gl I<<IL..rl III I IL, I IL I g~I.<<gag LCA~II~A",".W%~~~~~~~~~~~~~~L~~~'~~~~~~~L~~~~~'9~~~Flrlrl I/A I'l~, (rL(fl~I: j."-.~N+~~~4 aA~>~(/Lr I L I/(r r.~~g~~IILay W C,~~~~/r~L%/r/LL/I I~~rl (IL~/((i<<//4(L~~~~~4~~rlr~>//I L I(~I/r I I I(g/~~~'~Ar~(L I(/L/'L L Lgw7(grlL I'(/'r/L lr r I(rl+I/lg I'~III Lgr/I I/l/I r/hl\/L I/j~Pf I/l I L/'L//L L I LLI/I lw wtL L r/Lr/L gwg glg Lr L Lr lr/r I lw//lr Ltrl I~lr\/I i I/~LT\q I\<<L/%~~~I>>(<<g I~r L Lg qr'L L I~'l~grl r lrr+/r L/L wl(L/I r L I L>>qyL'L I L/r LI I lr~r L/q~~I I~~Q<<QO>>+i+-g L I r%/L I ilr I r'r~~%++IN~rr~(r llr I\/L<<L/\<<L ILL<<~L((gh I~+l r li r I>>, g I'LIIL(/I L~I~I (Lg rl///>r/r wlrr~/I~r~r'I L l~r L,L L//LI I~//~~I I I~~\~I.r I/('>>(I/L f/~/L"'/L I L I lrgl L lrl(g>>L/L I (r L r/(IL Lrll/I I(%/SCAI.E I L~I/r w I/L I rl r/~+l>>,~/I HORIZONTAL:

I" t2000'ERTICAL

I"=,Ioo'ERTICAL EAACCERA IOH: SX XIC FI.OX BEOOIHC IS NOT EXAGGERATED.

HOTE: OIP OF YOLC 1200 1000 800~600 AOO 200 r I~1~~'L~~~~~~~~~Il~~+L<<,O 0;I 8ASEMEHT I SILTY SAHO, SAHO ANO GRAYEI.LY SANO (LZ-2)FANGLOMERATE (LZ-1)YOLCANIC FLOWS AND FLOM BRECCIA BRECCIA TUFFACEOUS AHO ARKOSIC SANOSIO?iE TUFF COHPI,EX GRAHITIC ANO METAMORPHIC ROCKS WATER LEYELS MARCH 1979)PERCHEO MATER ZONE REGIOHAL AOUIFER UPPER loME: SII.TY CLAYS WITH SOME SII.TS ANO SILTY SANDS (LZW)>>I LONER ZOHE: PALO VERDE CLAY (LZ-3)Ck LOWER COARSE 6RAIHEO UHI T~<<Figure 8.0-1 GENERALIZED HYDROGEOLOGIC CROSS-SECTION OF THE SITE 132 901I 05 0207<<3f, j

'I rE U er Alluvial Unit This unit consists of primarily silty and gravely sands of varying proportions with interlayered, discontinuous lenses of clays and silty clays.This unit.extend's to a depth of about 30 to 60 feet beneath the site.In'dividual layers are about 3 to.10 feet thick, and are'I.characteristically moderate to poorly bedded.The stratification is typical of sediments deposited in a high-energy fluvial environment.

Primary sedimentary structures identified during the detailed geologic mapping of power block excavations consist of channel cut and fill features., The permeability of the upper alluvial unit soils was determined by inflow and outflow (pumping)type field tests.The typical horizontal permeability of these deposits is about 10 gallons per day per square foot (5 x, 10'entimeters per second).Because of the extensive stratification, the vertical permeability (not measured)can be expected to be significantly lower than'he horizontal permeability.

Middle Fine-Grained Unit This unit consists of massive, continuous layers of clays and silty clays, interbedded with layers and scattered lenses of clay'ey silt, clayey san..and silty sand.The thickness of the unit is about 250 feet.The upper c'ontact of'he middle fine-grained unit is equivalent to a well-defined boundary between two distinctive depositional environments and can be clearly identified across the site.Locally, the'ontact is transitional where a few scattered lenses of silt and fine sand are encountered.

The middle fine-grained unit corresponds to lithozones 3 and 4 of the geologic=model.The distinction between the two zones in the middle fine-grained unit is based on subtle but definite differences in geotechnical and 133 0 r 7 I hydrologic properti.es.

Silty clays of medium plasticity predominate in the upper zone (lithzone 4), while clays of somewha" higher plasticity predominate in the lower zone (lithozone 3--Palo Verde clay).The two zones are separated" by a relatively continuous coarse-grained soil layer.The permeability characteristics

'of soils in the upper portion of the unit were.evaluated by both laboratory and ,field tests.The vertical permeability, de'termined laboratory tests, is on the order of 0.001 gallons'per day per'quare"foot (5 x 10 centimeters per second)and 0.01 gallons per day per square foot (5 x 10'entimeters per second), respectively.

Lower Coarse-Grained Unit In general, the lower coarse-grained unit is described as a"variably" cemented conglomerate which lies directly on the undifferentiated basement complex.In the site area, the lower coarse-grained unit consists of a tilted interbedded sequence of vol'canic flows and flow breccias, tuffs, tuffaceous sandstones, and coarse-"grained arkosic sandstone.

The flow breccias (which may be interpreted as the"variably cemented conglomerate")are common throughout the sequence (lithozone 0).Locally mantling this volcanic/sedimentary section are-deposits of moderately to well-lithified conglomerates (lithozone 1).The entire sequence is overlain by an unlithified to poorly-cemented silty sand, sand and gravely sand (lithozone 2)~The.permeability of the regional aquifer was assessed by reviewing irrigation well pumping and performing an aquifer pumping'test.Yields from irrigation wells which tap the regional aquifer range from 400 to 2,800 gallons per minute.The average specific capacity is 35 gallons per minute per foot of draw-d'own.

The aquifer pumping test, performed on an'xisting irrigation well resulted in a calculated transmissivity of 100,000 I gallons per day per foot and a storage coefficient of 0.005.The pumping rate during the test was 2,360 gallons per minute.134

8.1 Groundwater

Conditions In the site area, the groundwater reservo'ir consists of an extensive regionai aquifer and a local perched water zone, Re ional A uifer In the site area, the lower coarse-grained unit, described above, comprises the regional aquifer that extends to over 400 square miles.The regional h aquifer is bounded by the mountain masses that encompass the lower Hassayampa-Ce'ntennial area.The'primary recharge source to the regional aquifer in-the site area is underflow from upper Hassayampa Valley, north of the site area.The general flow direction is north to south.Reversal of flow direction occurs locally when the groundwater levels are depressed due to pumping for irrigation purposes.Infiltration of'recipitation, surface runoff, and return flow from irrigation in the vicinity of the site comprise a small portion of the total recharge of the regional aquifer.Discharge from the regional groundwater reservoir occurs as underflow to Arlington Valley and pumpage from irrigation wells.Piezometric levels in the vicinity of the site are at depths ranging from 100 to 250 feet below the ground surface.A water level contour map of thegional aquifer in the lower Hassayampa-Centennial area was constructed by the USGS.and is reproduced in Figure'.1-1.

The most conspicuous-hydro'logical features indicated by the water level contours are the large cone'of depression beneath the site, and a broader but shallower cone of depression south of the site.A smaller cone of depression also occurs immediately north of the Palo Verde hills.The cones of depression have been formed by long term pumpage from irrigation wells in the area.Artesian conditions prevail within the aquifer in the site area.Confinement is generally provided by the middle fine-grained layer.135

toe 61ss o sso EXPLANATIOH NELL IN SNIICN NAIER LEVEL NAS HEASOREO IN 19SZ--First n>n>bec~209, is depth to<<ster In feet befo<<land surface.Second nunbec, IZZ34 IS the e ltftude of the<<etec level in (eet above nean sca level SEOROCK!VOLCANIC>

GRANITIC>HETAHORPHIC>

OR SEOIHENIART ROCK)--S>>ter n>>y OCCur fn<<eathered or (ractuyed tones, Joint systens, oc thin elluvfun overlying confolfdated rochs NAIER BEARING UNlls IcLAT~sILT~sAvo>GRAYEL>BAsALTI RATER.LEVEL CONTOOR--Shp<<S eltf\ude O(the<<ster level.OaShed<<herc epproxf>>ate.

Overfed>>herc uncertain.

Contour I tccvat So cet on the nap end lo feet on thc Inset.Oatue fs nean (n sea level PHOENIX ACTIVE HAPIAGEHENT AREA SOS.SASIN SIR¹6OARV Section showing groundwater conditions in the Hassayampa sub-basin of the Phoenix active management area.R.SV n i 8 I I 90 065 31 l 905 41 890 p 4>>I 13 907 I f t=A 51 72, lp~~jS~891-r rr~~4+~/q904 Z 15/)/~908/i g,l.t~44>>cc 4>>V)I~>>by~0 45 097 904~32~~35 005 s76 I 072 88 el r~~'"'Pi'.=O'O.

f I;f Jv j (INSET)PALO VEROE NUCLEAR GEHERATIIIG SIATIOtt OEPTH TO MATER AHO ALTITUOE OF THE MATER LEVE'L IH THE PERCHEO ZONE SCALE I:62,500~~>>>pi r 0!'>06>J Hr>G~~e=e~e v TOHO>AHI 295 1073 297 07!~2)I 237~I e~>I 062""0 Zno 33'30 lgn 917*-~l'37 I7 4 974!47')Hp~145.*r 900!39~c>I 103-i t o lcr-/>..~966>9 1'100-I=lr3----06-V 100 95 e 955 I 960'l 9G5: 0)0 055', 2241~857 0""'52'">I('95~E.j, 035 9 6,>44>6 I",9)55 i>>4~9 i 0 0'('<196~806 959-'942: 936..I'43'I>4, f9tg cp>pflct/s I T I H 933>~L-50 I 16~4'if J U~~~~c R)..>I..J SIH.,~I~r.'>>tfl>75

~6 022 n~921 69 i72 6~G I 920~55 y 911 ld6906 Lr'!OH.')"~!7-1>I~, i 1080 goo>$44'I~:,',I Ij-'-~877'EE EIE>EE9 99.~89 7~, Q~o<<P-'300'I.I.~~8>>.847 cc I I~9>I+'83a>J~0'0 y-6"i-~8'.V.H.G.S; e 663~--'815-.n 812 I.6~~rJ>,j>9<>r(282S>7(14'2594>f!

ivii'687 M I I.>rl>yi Fn.sy'<o gc-'.ISJLLEHS~~, (IJT Q/219.,I.a 66!.621'IJ.0'>a657 207'g-662~t.~128>>I-ef 793~', (~p 79>c ic>ja~4~lii q~lh<<50 j 783'c.I I S.-ARL IttGTON 22 46>>>I>y~03,7.>Q.IJ!>,6)4~."'8 4)~'i380 i de.~::".n J-..y il-h.ia,i>gg Id."200u.

I l~'y'>I ,'.';: 9"]miIIV~~0 nap'112 45~~~.GILLESP IE OAH 113 00'>>163732" O'I.'57'.r;>,>)n>>>y,<'i'.'.

33 15'R.8 M.For readers who prefer to use units, the conversion factors are listed below: Hul tip l inch-ound unit inch'oot mi le square mile acre acre-foot gallons per minute 25.4 0.3048 1.609 2.590 0.4047 0.001233 0.06309 To obtain metric unit millimeter meter kilometer square kilometer'quare hectometer cubic hectometer liters per second metric units rather than inch-pound for the terms used in this report R.TMŽ8<<ca>r T.63I ci iP,*L>~.Cy>>'.)ac<<6.II.6 V.T.3 S.R.5 M.SI APERTURE CARD Also Availab1e On Aperture Card 136 0 0 CONTOUR tHTERVAL ZOO FEET MIIH SIJPPLEIIEtITART CONTOURS AT 100-FOOI'HTERVALS OAIUH 15 HEAII SEA I.EVEL SCAI.E I: IZ5.000 5 HILES 10'('LGI-!C-TERS Fi ure 8'.l-l g DEPTH TO MATER AND ALTITUDE OF THE MATER LEVEL, 1982 90110 5 0207~g g

+1 Lg r.0 Perched Water Zone The Palo Verde site is situated in an area that was under cultivation from about 1950 to late 1975.Water for crop irrigation was pumped from the regional aquifer.Most of the water was consumed by the crops (primarily cotton)through evapotranspiration.

The remainder of the water perclated=through the upper alluvial sediments and perched on top of the underlying aquitard (middle fine-grained unit).The shape of the perched mound is consistent with the shape of the irrigated area within the site.~Water table conditions prevail within the perched water zone.During the 25 year period of agricultural activity at the site, the prime source of recharge of the perched water zone was excess irrigation water that percolated through the upper sediments.

Since 1975, when agricultural activity stopped within the site, the only source of recharge has been precipitation and surface runoff.However;as evidenced by the sharp decline in perched water levels since 1975 (3 feet per year average)local natural recharge is insufficient to maintain the perched mound.The decay l of the perched water mound is caused mainly by radial flow outward from the center of the mound and some downward leakage through the aquitard.137 I I 0 8.2 Re ional Water Use Water for irrigation is the major use of groundwater in the lower Hassayampa-Centennial area.An average of 78,000 acre-feet per year was pumped during the period 1.'.6 through 1972.The water for municipal and domestic use, also obtained from the groundwater reservoir, is ve'y small.Annual pumpage for municipalities, livestock; or industrial purposes is less than 1%of the total.The production history of wells in the lower Hassayampa-Centennial area is compiled in Table 8.2-1.The table].ists well locations for known active'ells and the annual pumpage rate for each well for the years 1966 through 1972.A steady decline'f the water levels in the area began about 1950.due to the increases in pumping of groundwater for agriculture.

The water level has declined by as much as 100 feet near the centers of cones of depression during the past 25 years.The water level decline is attributed to pumping of wells and the resultant spread of the cones of depression and consequent interference effects between wells.8.3 Accident Effec'ts Contaminated water, if accidentally spilled during plant operation, may seep through the ground surface.For this postulate'd occurrence, the contaminated water will'nfiltrate downward through the unsaturated soil and reach the perched water table about AO feet below the land surface.It will then disperse into the perched groundwater.

Further downward movement of water from the base of perched water zone is restricted due to the presence of the Palo Verde clay layer about 200 feet below the ground surface.For the conservative analysis used in this study it is assumed T that seepage could occur through'the Palo Verde Clay layer.Consequently, two systems are analyzed for the possible effect of a contaminate'd water spill: the perched water zone and the underlying regional aquifer.The impact of such postulated accidental seepages on the system, and, in particular, on the existing wells located in the 5-mile zone around the site area, is analytically predicted and its consequences are assessed.138

Table 8.2-1 PUMPAGE RECORDS OF'ELLS IN TllE LOWER HASSAYAMPA-CENTENNIAL AREA (Sheet 1 of 2)minuend.nusir nrr.(lii ncnu-rcr71

,(8-1-5)(8-1-6)NO.6ddb2 7aab 10bcc 10ccc 15bbb2 16bbb 16bca 17ncd 2lbbb~21ddb 27bbc 28aaa2 7bdd 8abb loaab llbca 20dab 20dbb 4 27cbc(b)27ddc(b)34abb 34acc.34adc'b)1966 556 558 105-249 82 101 83 258 398 592 40 57 25 63 723 2,099 2g279 1967 654 550 117 284 75 40 74 240 1.959 812 35 76 43 106 957 2.G84 2,960 1968 470 372 92 34 58 54 Gl 249 799 7G3 97 42 129 315 790 2'73 2,319 1969 1 1 2 663 448 9Ci 14 81 49 81 309 852 709 33 76 486 97 916 2,17G 2,914 166 1970 5 2 0 0 212 0 30 41 290 435 492 18 478 22 655 2,157 2,247 31 1971 80 80 2 328 3G 55 15 302 758 GG1 103 1,155 24 779 2,105 2,343 45 1972 140 48 56 154 715 813 161 849 44 1,277 2,583 3,638 0 (B" 1-7)lbbb 1,725 1,820 2,690 2,800 3,064 2,991 3,815 (8-2-6)(B-2-7)Sdaa 6daa Baaa 9bba 16caa 17aae 17C)ila 19bbb 19daa 20bba 20daa 21bba 23aab 24cba 28bab 3 ldila 32db 33caa 12cbb 14cbb 22bbb 22cbb 23ccb 25bca 2Gaac 26abb 26acb 26bab 27aab 28bab 28bbb 34bba 36abb 36bba 36cbb 758 3G4 1, 184 1,557 658 549 773 15 1.9.619 1,286 318 358 1,020 528 653 1,324 477 503 7Ci2 1,140 1,494 2,325 1,341 670 1,399 35 2.1 884 1,588 516 491 1,067 564 822 1,996 952 1,110 827 1,205 1,829 2,581 994 355 1.454 475 3 682 1,305 674 607 909 442 393 2,012 895 1, 121 1.374 1,827 1,580 1,334 561 1,925 1,022 89 041 6G1 386'70G 984 2.394 962 1,241 353 1,453 386 4 724 1,216 802 594 919 394 80 2,041 845 1,056 1,3G3 1,659 1,372 979 414 2,200 1,479 207 806 545 662 807 1,340 2,365 1,134 1,489'" 144 1,685 588 4 759),340 1.106 598 667 410 3,198 776 887 1,277 1,997 2,193 1,995 448 2,193 1,4G3 20 680 ,981 802 466 805 100 1,661 2,258 1,069 20 1,461 246 1,631 1.058 713 1,467'70 1,283 466 3, 407 720 986 1,707 2,087 2,303~1,896 647 2,412 1,565 998 600 604 670 705 1,767 2,505 2,038 1,866 1,562 946 697 1, 479 823 1,390 559 3,414 606 832 a.Data compiled from files of Hater Resources ()ivislon.

Phoenix, hrirona.b.Hells located within the)iVHCS Site.U~S.Ccological Survey, 139

Table 8-.."--l PUMPAGE RECORDS OP WELLS IN THE LOWER HASSAYAMPA-CENTENNIAL AREA.(Sheet 2 of 2)WCt,l tIO.1966 19G7 n<II<unt.ru(Itin<It) t tu nCIIt:-rt:I:TI 197<)1969 1968 1971 1972 tc-1-5)lcdd 3bas, 4aaa2 13nab 13aad 13bad 13bba 13cdd 2 tc(1<l 22ccc 23ccc 23dca 24ccb 36sbb 27ddd2 28aab 29adc 32bss 32ccb 34adc 34dbd (C.-1-6)13cab 14dbb 17sbb 18bbb 19abb 2lcbb2 23adb, 23bab 23csa 26abs 26dad 27bbc 28acc2{C-1-7)14bbb tC-2-5)3aas 5bcb 5ccb 8abb 8ccc 9cbh 16sbb 16daa SOI 614 1, 117 343 571 1,395 713 301"36 397 1, 510 1,738 1, 196 79 153 1,02G 410 711 1,510 2,391 1,560 141 617 2,237 0 1, 111 7 3Ci 1 541 1,201 490 820 1,988 526 548 545 2,019 673 1 005 867 81G 1,500 2Ci0 965 956 1,714 2,560 2,610 78 913~1,022 1,281 2.726 2,865 1,060 302.531 1,763 405 471 1.600 862 0 513 1,935 1,269 752 772 870 1,219 39Ci 901 926 1,G72 2,239 1,996 135 718 Sll 906 1;541 2,189 1,450 1,342 422 26 2,429 1,624 917 1,07G 9.)0 857 TABLE OF COIITEIITS SECTION pAGE NUMBER 1.0 PURPOSE

2.0 REFERENCES

3.0 DEFINITIONS

AND ABBREVIATIONS

4.0 RESPONSIBILITIES

5.0 INSTRUCTIONS

5.1 5.2 5.3 5.4 5.5 5.6 5.7 Operation of the Landfill Sludge Disposal Monitoring Monitoring Contingency Requirements Monitoring Requirements(Record Keeping Compliance Reporting Requirements Site Inspections WRF Disposal Requests ,7 8 9 10 11 12 13 APPENDICES C Appendix A-WRF Slu'dge Landfill Disposal Request 14 Appendix B Appendix C,-WRF Sludge.Landf ill Monitoring Repor t Form C Chain of Custody Form 15 16 Appendix D-Visible Emissions Observation Form 17~'lS 000 REV.SIR S4~A

'i t I l 1 l I I

~~PALO VERDE NUCLEAR GENERATING STATION MANUAL PRQCEQUr.=

NCI.VOAD-SZZ04 REVISlGN'RF SLUDGE'LANDFILL PROCEDUP Page 3 of 17".0 PURPOS.This procedure is to provide the necessary instructions and guidelines to ope.ate the Sludge Disposal Landf'll within compliance to meet state permit requ'.ements.

This document conta'ns all of the requirements for'he operat'on and maintenance of the Sludge Disposal Landfill.Ho other documents Qr correspondence will.take precedence for the.operation and/or maintenance of the Sludge Disposal Landfill.This procedure will be modif'ed as appropriate to reflect any changes that may occur to, the state permit requirements regarding the operation and/or maintenance of the sludge disposal landfill.I'.0 REFERENCES

2.1 Implementin'g

References 2.1.1 Test Hethods for Evaluating Solid Paste.Physical/Chemica'ethods SV-846, 2nd Edit'on.KsRD sz~o1,~M pratcc+ivc 6)ui (men't Proc~<~~2.2 Developmental References I 2.2.1 Groundwater Quality Protection Permit Ho.G-0'077-07 as provided in the Ari"ona Revised Statutes (A.P..S.36-1851}.2.2.2 Landfill Operation Plan issued by the Solid Paste Un't of the ADEQ.2.2.3 State of Ar'=ona Groundwater Quality Protection.

Permit Rules and Regulations (A.A.G.R18-9-l,00, et.seq.}.2.2.4 Palo Verde Huclear Generating Station-Revised Landfill Operation Plan.Jan.6, 1987.k.X 5-S,et'age 3.0 DEFINITIONS AND ABBREVIATIOHS 3.1~'Abandoned means permanent cessation of facility operation.

as determined by, the facility owner.Facilities which are temporaril.y shut down are not considered abandoned within the context of"these regulations.

3.2'Activity means any human activity including institytional, commercial,'manufacturing.

extraction, ag.icuitural or residential land use which may involve disposal of~astes or pollutants which may result in pollution of groundwaters of the State.~t1l 000 HKV.Oat Sl4*

PALO VERDE NUCLEAR GENERATING STATION MANUAL QR,F SLUDGE.LANE FILL PR,OcGD~RF F'RQCr"=i~UP

"" NQ.~v)oAO-BZZod Rr"=V IS I QrV Pa't 3A Q,.X.5 p~)u rrrerhe Huckprnr Gener a+in~5"rrr4ion, Rgdcd'rrrg Ccrnr ikrnenk'7i.~ir,irg SgsWe~, g4enng N0.(e~];~)g)~oala74~ox<18(<o>l'764~o~l~8<~o~Se 6I

a PALO VERDE NUCLEAR GENERATING STATION MANUAL s WRF SLUDGE LANDFILL PROCEDURE PROCEDURE NO.ROAD-87.304 REVISION Page 4 of 17 3~3 3 4 3.5 3.6 v'ADEQ'eans A"iaona Departmen:, of"-..vironmental anality(ft Oy t h),"Adverse impa'ct upon groundwater quality" means any measurable change to the physical, chemical or biological character of.groundwater caused by additi.on of pollutants or wastes.s"Approved" or"approval" means approved in writing by the Director of the Arizona Department of Environmental Quality.'Aquifer" means a geologic unit that contains saturated permeable material.to'yield usable (drinking water, agriculture, industry,, etc'.)quantities of water to a well or spring.3.7 3.8 3e9 I 3'0"Director" means the Director of the Arizona Department of Environmenta'uality or his duly authorized representative.

'Discharge" means the addi.tion, spilling, leaking, pumping, pouring, emitting or dumping of.any pollutant into waters of the State from any point source.'Discharge Impact Area'eans the potential area extent of waste or pollutant migration as projected on the land surface as a result of a discharge or disposal.from a facility.Discrete sample" means any individual sample collected in less than 15 minutes.3.11"Disposal system" means a system for disposing of wastes e'ither by surface or underground methods and includes sewerage systems, treatment works;disposal wells and other systems.'3.12 3.13 3.14 3.15 Facility" means any system or activ2,.ty'.$

n'which or by which'disposal occurs or,has occurred on either*a.continuous or intermittent basis."Groundwater".,means water under the surface of the earth regardless of the geologic structure in which it is standing or moving.Groundwater does not include water flowing in underground streams with ascertainable beds and banks."Ope'rator" means any person who makes management decisions regarding facility operations.

1"Owner" means any person holding legal or equitable title in any real property subject to these regulations.

PV2lb COO AEV.byb2 Sb~A

PALO VERDE NUCLEAR GEINERATING STATION MANUAL PRGC"-OU~a NO.'BROAD-Scc.04 R~cyISIQN'RF SLUDGE LAHDFILL PPOCEDURE Page 5 of'7 3.'16 Permit" means a rule.certi f:cate,:letter or anY other docunent'ssued by, the"Director authori=ing aed condit'ioning the discharge of any pollutant to groundwarer from any point source or disposal of.wastes from any disposal system identified in A.R.S.Sec.36-136.G.S.

3.17"Pollute means to cause pollution.

3'8"Schedule of compliance'r compliance schedule" means a written document issued by the Director which identifies requirements and times for compliance with either or both the water quality standards in A.A.C.Title 9, Chapter 21'or the permit regulations in A.A.C.Title 9, Chapter 20.3'9"Site" means the area where any facility is physically located or an activity is conducted, including adjacent land.used in connection with the Eac'lity..

F 20 Vector'efers to an organi'sm such as an insect that transmits a pathogen.4.0'RESPOIISIBILI IES 4.1 WRF Operations 4.F 1 The sludge disposal landfill shall be operated in accor'dance with plans approved by the Solid Waste Unit of ADEQ, the Groundwater Quality Protection Permit and subsequent Aquifer Protection Permit rules and regulations.

I~4'.2 All,materials that may be dumped in the sludge disposal.landEill are approved and non-hazardous under the State Ha=ardous Waste Regulations.

The permittee shall at all times properly'ope.ate and maintain the sludge disposal'andfill to maintain compliance with the terms and.conditions of the permit.l Combustibles, hazardous wastes, and putrescible materials may not be dumped in the;sludge disposal landEill.&414Wo A4V.4i44$44 A f (i ,I PALO V:"ROE NUCL=AR GFNE~Ai tNG STAl1'ON MANUAL SLUDCE LAND-.":LL PPOC:-DUP-F RQC:-DUFF"" NQ.'ROAD-6 7.: ""." RFYlSiGN pa-e 6.o: L)4.1.5 The materials vhich may be dumped include t (a)devar.ered sludges generated at VRF/I (b)lime gr'r.or lime~aste~hi h mav'be'rom lime used'n clean'ng acid spills.from ne traliaing beds.or sma quant'ties spi'led during 1'-.e unloading (c)soda ash and soda ash Masres~hich mav be from soda ash used in cleaning acids sp'lls or small quan't'es spled=during soda ash unloading r C'nstr(Hcte.Cc4M Pajt (,p, t~~~'iscellaneous non-putrescible.

non-ha"ardous.

and')non-radioac

've sludges that may ccme from the cleaning, l of a WRF lime softening process sump.lr g~~Wk~1~~o o o>>~\~.'1'I~4~1'6 Zf.a vector prbblem occurs, a vector program vill be implemented for the sludge disposal landf'll.~Station Services Station Services shalI be responsible for the heavv equipment operations of the sludge disposal Landfill~4..2~1'I 4~1.7 Any litter that exists on or around the Land&'ll shall be picked up"'and disposed.l 4.2 PV)tC" 4.2'.2 4.2.3~>I%0 1tV slit SI4 s Station Services shall be responsibl'e for the designation of appropriate dump locations and move such Locations adequate material for a lift has been dumped.The sludge disposal landfill MiLL be maintain~d during inc],ement Meather.Equipment.

chill be avaable to support rhis operat,ion.

I.

PALO VERDa NUCLEAR GE¹RATtNG STATlON MANUAL I RP SLUDCc, LAND.=XLL PROC DUU P RQC~DUR:-NO.ROAD-itZZ04 REVISIOi"4 Page 64,0.17~>fc~g<Ol I I g 7 h e Q J Q r c u I (f r 0 v i<I a n n e n a n c j e q u p m e n t+o h a u~<<.~~~e't.,F~~~

<<-~s<~+I~dp~II prj gers wi II I r au<I.a+a u g<j~ax.,rnuj>>.yf j$Ml'H I re, du.+conTra(dr(vers uuill limj I I y,'a/uiraj'lei" priv'err uzi I r educe Wrje.a~.un~'Ia i'Iclf)II a+ounI-oF dus i crea tea by Preaking<'ludge cl us+'j'.I.jo.jo en>ure lusf cc nf'ra I drij'e'rs mt I(+hor<uy h ly hose t('uck/pl'ai lers fo inclucle-+ires and*unJersIE~, V I t l I I PALO YERDE NUCLEAR GENERAI1NG S IAT1ON MANUAl~n'RF SLUDGE LANDFTLL PPOCEDURE PROC=DURE NO.WOAD-SZ20<

Rc.YISION Page 7 of'7*~4;2.4 The.area.around the landfill is virhin the confines of the)ob-.site dust.control'rogram

'and vill be treated the same.S~sc 7A oe~+In c'z 4.3 Technical Support Group 4.4.1 4.3.1 Sampling, monitor'ng, records keeping, and sending samples to a state approved laboratory shall be the responsibil'ty of.the WRF Technical Support Group.4.3.2 D'ata obtained from laboratory test res'ults (the original fdrm)shall be forvarded to ANP?Environmental Licensing for-the annual report to the State and copies kept for records.C 4.4 Env'nmental Licensing Environmental Licensing shall.submit the Comprehensive Annual Report to the ADEQ per'tep 5.2.6 of this procedure.

~4.4.2 Environmental Licensing shall provide a copy of the Comprehensive Annual Report to the WPP'echnical Support Group.4.4.3 4.4.4 Environmental Licensing shall be the normal point of contact'or coamIunications, either oral or vritten.with all applicable federal, state and local regulatory agencies regarding the operation of the WRF Sludge Disposal Landfill.Environmental Licensing shall be responsible for all groundwater monitoring associated with the landfill.4.4.5 Environniental Licensing shall make Visible Emissions Ob'servation checks monthly and complete the Visible Option Bmssions Form (Appendix D).'Ihe form shall be retained and filed at the hbter Reclination Facility.Additional checks will be nede as re-quired by changing conditions.

5.0 III STRUCTTOIIS

5.1 Operation

of the Landfill 5.1.1 5.1.2~'~O:0~EY i~it!I~a The landfill is a surface drying landfiLL used for disposaL of sludge produced in the lime treatment process at,"RF and sha)1 be solely operated by AIIPP personnel.

Sludge vill be transported to tho: disposal area'and spread lifts.

0 PALO YERDE-NUCLEAR GENERATING STATION MANUAL goffI I t gOC6DQRG'ROC:-DURE NO.&octo-g22og'EVISION Pa e 7A of, 17 r 5eeuices s hali be irsi>oesible Fos pic OvD I n]d.(i o.S 45<++t$~~l$i ye huSW:~5\H i roasts+'o a.nk Prem+Re'~an r s'e s~h~Ic+nic~s krIqc o++he fr y$>I IYLis I l1)r Sp I"Cak I Ag OitI l"4.t Il~+CQCSSal t 4~~sg p'o servIc s aha'i(be<<s0 fOa~~ays o A g(ea$o>.+h~(~t,~~~~6.ri'ng a~<ge,g I)ea~e~, d~~]'gp;I(csea+hat's+k~g ((tlat~I+tlAIZ+~

'tll eye>>W ki>'b>saba~J$0t oaed Q,7'2 shat~(<<Iog I<<Il'f<e"~+~~e~ovc..sp.(tie<r C~

PALO VERDE NUCLEAR 6" Nt=RATlNG STATlON MANUAL PROC"=iR"=WOAD-82"04 R:"V}StON VRF SLUOG:-LAHDF'1LL PROCFDUP.:-

page 8 of l 5.}.3 The sludge wil.l be al3.owed,to dry before it is spread 1'fts of one'(1}foot deep.5.1.4 The process of spreading and leveling<<ill result in compaction to approximately 90X of maximum dens'ty.5.1.5 5.1.6 Additional lifts will be added in the same manne.unt'l a depth of six (6)feet is reached.After the six foot dearth xs reached.the site shall be covered with approximately one foot (1')of clean earth.5.2 5.1.7 Stat'ion Serv'ces shall grade the landfill as to prevent moisture runoff.The grading shall remain similar to the natural contour of the site.e Sludge Disposal Monitoring 5.2.1 5'.2 A composite sludge sample, comprised of a minimum of four (4)locations representative of the disposal activities shall be taken at che sludge disposal landfill by'the WPF Technical'upport, Group.I'These samples shall be taken twice yearly in accordance with EPA SW-846, 5'.3 A"Chain of Custody" form will accompany the samples when sent to the selected laboratory.

The form may be, Append'x C of this procedure or one similar.PQ e 2 gravc,l shat'l be.on<<Lesig<o++d t><8 s'~xc epf g~~p,~a,@Y ia.l or~ainkdl lh+4<I<A~~t lI I pvtia o:0 aEv cia Sea A C

PALO VERDE NUCLEAR GENERAT1NG'STAT1ON MANUAL PROCEQURE NO.,WOAD-82204 REVISION WRF SLUDGE LANDFILL PROCEDURE Page 9 of 17 5'.4.The samples shall be analyzed by EPA approved test methods.(Test Methods for Eva'luating Solid Waste, Physical/Chemica'ethods SW-846, 2nd Edition)for the following constituents..

C"nstituent Alert Level pH Arsenic Less than 2 or greater than 12.5 5., mg/1 or EP Toxicity Barium 100 mg/1 or E?Toxicity Cadmium Chromium (Total)Lead 1 mg/1 or EP Toxicity 5 mg/1 or EP Toxicity 5 mg/1 or EP Toxicity Mercury Selenium Silver 0.2 mg/1 or EP Toxicity mg/1 or EP Toxicity 5'mg/1 or EP Toxicity I.5 The, WRF Technical Support Group shall submit the test results'o Environmental Licensing.

5.2'Environmental Licensing shall report the results to ADEQ in the Comprehensive Annual Report.The Annual Report shall include a summary and evaluation of all past and recently obtained data.The data analysis shall include'he presence of any trends and natural variability.

4 4 1 5.3 tl , The sludge disposal monitoring is only part of the report as it pertains to water quality.Monitoring-Contingency Requirements 5~3.1 5.F 1.1 I Exceeding Alert Levels in Sludge Samples.Exceeding alert levels shall necessitate verification sampling and'may necessitate remediation at the facility.ll W1l6 000 AEV,542 S64 A

PALO YERDE NUCLFAR GENERATING STATION MANUAL'ROC OUPa NO.WOAD-82704 REVISION WRF SLUDGE LAIIDF ILL PPOCEDUP E Page 10 of.1=7'.3.1.2 5.3.1.3 ln the event leve's are exceeded, Environmental L'icensjng shall notify, the.Water Po}:lution Compliance Unit wxtn n 72 hour~of becoming a~are of the exceedence

'to determ'ne the appropriate action foi the condition..A scope of work wh'ich addresses corr'ective and remedial actions must be submitted to the Department (ADEQ)for review and comment within 30 days of becoming aware of the alert levels having been exceeded.~5.3~1.4 An approvable cont'ingency plan must be submitted to the.Department for review within 180 days.after the, leve's were exceeded.5.3.1.5 Upon approval of the contingency plan by the Department, the pl'an will be incorporated into the'ermit.

5,4 Monitoring Requirements/Record Keepin'g The WPP Technical Support Group shall retain records and/or.provide access to a11 monitoring information for a period of at least'three (3)years from the date of sample.This period may be extended by the Department by written request.The request, shall be coordinated through Environmental Licensing.

Copies of records shall be furnished to the Department upon written request.5.4.2 Records of monitoring the f o1 lowing: shall include but are not lim'ted to 5.4.2.1 Date, time, exact the sample.place, and name of person who obtained 5.4,2.2 The date(s), name(s)of the person(s)and laboratory who performed the, an'alyses.

5.4.2.3 The analytical technioues or methods used to perform the analyses.~'5.4.3 Monitoring results shall be reported at intervals specified by the Groundwater Protection Permit and subsequent Aquifer Protection Permit as reflected in this procedure.

5'.4 Calculations which require the averaging of measurements shall utili-e an arithmetic mean uniess it can be demonstrated that another method would more accurately describe or be representative of the monitored activity.PV2I6 00D REV 6162 Mi A I 1 i'I I~~

PAL'0 VERDE NUCLEAR GENERATING STATlON MANUAL WRF SLUDGE LAtIDFILL PROCEDURE PROCEDURE NO.ROAD-8ZZ04 REVISION Page 11 of 17 5.5 Compliance Reporting Requirements

5.5.1 Modifications

to'the facility which are not described in the Groundwater Protection Permit require an advanced written-notice of ninety (90)days and shall be coordinated through and submie.ted by Environmental Licensing.

5.5.2 The permittee.

shall notify the Department within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or becoming award of any permit violation.

The Department may require a written report within 30 days documenting the following:

ll 5.5.2.1 A description of the non-compliance and its cause.5.5.2.2 The period of non-compliance, including exact dates and times, and the anticipated time period'uring which the non-compliance

'is expected to continue if it has not been'ompletely corrected.

5.5.2.3 The plan of and prevent applicable,'contingency action.taken or planned to reduce, eliminate, reoccurrence of, non-compliance and if shall be in accordance with an approved plan.5.5.2.4 Monitoring or-other informatinn which indicates'hat any,'aste or pollutant may cause an endangerment to an aquif er.5.5~2.5 Non-compliance w'ith a,permit condition, or mal'function of the disposal'system which may cause fluid migrat.ion into or between aquifers.5.5.3 The DepartmI nt shall be notified in writing at least 180 days prior to abandonment of the facility.5~5~3~1 The permittee may be required to submit a detailed post-closure plan for appr'oval which shall, describe, what the physical condition of the landfill site will be on" the date operatioris are terminated.

PV215 000 AEV.bell Sd4 A

!t t t PALO VERDE NUCLEAR GENERATINQ STATlON MANUAL I'ROC'UR:" NO.'40AD-82204 REVISION MRF SLUDGE LAIIDFELL PROCEDURE Page.12 oi 1/5.5.3.2 The Department.

may require the post-closure plan include the following: (a).A description of monitoring procedures to be'implemented by the permittee including monitoring

.frequency, type, and locat.ion which will be implemented to ensure post-closure activities will not violate groundwater quality standards.(b)a description of procedures for maintaining the existing groundwate:

quality protect'on systems (c)a schedule and description of physical inspections to.be conducted following abandonment (d)a description of future land or water uses or both'hich may be precluded as, a result of the abandonment (e)identification of responsibilities for post-closure cleanup or remedial action in the event of pollution of waters of the state 5,.6 Site;Enspections

.5.6;1 The Department may routinely-inspect the landfill dump site and/or the records for purpose of determining compliance.

5.6.2'he Department 5.6.3 The Department samples either may obtain samples.may analyze or cause to be analyzed any on site or at another location.5.6.4 The Department may take photographs of the waste and/or equipment processes and'conditions of the site.~~5.6.5 The Department may inspect and copy any pertinent records.report.s, or information and test results, 5.6.6 5.6.7 Any pertinent infnrmat'ion.required by the permit.to be maintained by.the permittee shall be available for on-site inspection during normal business hours: Split sanqi16.s nr copies of photographs shall be available to the permittee if so requested at the time the samples or photographs are taken.Pv216400 REV,642 664 A I E PALO VERDE NUCLEAR GENERATlNG STA)1ON MANUAL VRF SLUDGE LAHDF1LL PROCEDUPE VOAD-Sd.ZO4 p)=V IS I 0 i'0 Page 13 i)f 17 waste materials from pVWGS departments natside the WRP, v b umped at the sludge disposal landfill only if th are appro d.The MF udge Landfill Disposal est form mus-be filled in to equest approval ee Appendix A)~The igtp Manager (nr'esignee)shall approve the material for dum: he material conforms to~acceptible m rials (see 4.le5).Afte pproval has been obtained, t material may be ped in the sludge disposal landfill.gsdgtb OCO gtKV~PC2 Sld d 0 t 0 VRF SLU.G:-LAtf~F'LL PROC:-DUR:-

R" V/SlCN Page i4 o: 17 ,......Reques~ar Ran e:.0 fiMMi.'~4 Dais,'EXPic<:@ps I'l I, 6,.Ma-.e.f'ia.

~r~c~o~.......WcaT'i~~j.....Confro,u Tgf Con~n+Q/gnoun, I..D~p.s'it.~/Od~:

Of lgspl~C..Sa~qI<Z<@r~~or, S>np1e f'Rna Iubjs.Per Qr~cd, GC:..Rnm~qsis PcAor~ck bg;pc(J$g i C I b f OQL Cs l Usia+PwmcMcd Qg: , Y Verig 3 Ana,)qadi Sar pIe.~.*'aPi~Nhcgan, C.'hernia rg o-rat'~~4~~Yes hIo f., Approval ll'er e criteria set, forth in the Cround~ater Quality Protection per it g g-pp77-p1 and 4VF ProcedurROAD-8220<

for the disposal o n'-t7.F Mastes in the MRF Sludge Lan4Eill.the material described erein is approved Eor disposal in the 4RF Sludge LandEill., WttlfCO tgygA ilute MRF Hanager Date 0 0

'ALO VERDE NUCLEAR GENERATING STATION MANUAL WRF SLUDGE LANDFILL PROCEDURE PROC-""DURF NO.*VOAD-'8ZEOI REVISION PPEHDIX B Pape 1'of Page 15 of 17 VRF SLUDGE LANDFILL IIOHITORING REPORT FOP%NAME OF LABORATORY ANALYTICAL TECHNIQUE OR lIETHOD DATE SAMPLE RECEIVED~'OHSTITUEHT LAB RESULTS TEST DATE TEST PERFORMED BY: H Arsenic Barium Cadmium (Total'Chromium~Lead Mercur Selenium Silver This form or a similar form may be used by the laboratory performing the analysis~The testing shall be performed in accordance Kith EPA approved test methods per SM-846.The form used shall be signed by the"Manager"'or higher management signifying authenticity of'he results.Laboratory Manager Date PVRld 00D HFV,dlt2 dd<A I!j I J t t r WAF SLUDGE LhtlOFILL PPCCKDURE 0 WOAD 82E04 APPKIIKI.C Page 1 of 1 Page 15 of l.I JGB I I I.I SAHPLKRS: I ISIGHATURc.l

)PBCJKCT HIHE.I I C i R 1 SAHPLZ LOCATION c I)CI SA!I?LE)DATE (T HK i 0 IVK'IT.)P))I lt C U 0 fHN 8 T K h A I H 0 E)FR.S c/SAHPI'IIG HETHGD/I///t/I I////.///I///,////I/////////////'////.///I.//////.'-BEHARKS///////I PHYSICAL h?PKARAIICK, etc)I/'//////I//////////I!//)I I I I I t.I LAB I I.D.I))I)AE Ill J SHFD oT;I SIGIIATUAE)

)CAT HE jRECEiVED BY'SICNA UAE)I I I I I.))RE i)I/DISHED BY~SI I~IATUBE))DA EIT HE RECEIVED BY ISIGIIATURE)

I I I)I I AELI I)AU Is)tED BY: I S tlhTUAK))DAT;TI..E I AKCEi WED BY c IS IIATUAE)(I I I-l I~I I I AELIttgUISHED BYc iSIGNATUAE)

)DATE:T!HE)BECKcVKD Bic i SIGNAF)BD)(I I)))I'RE tl'<CI Jiic 0 ill'S IGilh'F~I DATKc INK)BECK VKO FOR LABORATORY

)J)ATE/TIHE I)'(Bvtts)GIIATuBK)

I...I I)))I ilEHhtlKS PALO VERDE NUCLE'AR GENERATING STATION MANUAL PROCEDURE NO.WOAD-S4204 REVISION APPEtIDIX D Page 1'f 1 WRF SLUDGE LhllDFILL PROCEDURE" Page 17 of 17.VISIBLE Et1ISSIONS OBSERVATION FORtt Company Name Name of Source Business Address L'ocation of Source Representative Cont ac ted Date , Description of Emission Outlet l Equipment:

I IE.S;P.I.ICyclone I IScrubber Other Stack Height't.Area sq.ft.Temperature

'OBSERVATION CONDITIONS Sky Background of Plume Color of Emissions Temperature

-'el.Humidity.I Effect of Wind Velocity cn Observations:

N W I I S Sketch of Source, Operational Boundaries l Position Qf Observer.Photographs Time Plume is: I , I Attached I I Detached Point Plume.Read ft.from Stack Distance o 0 e..rom Stack f f bs rv Pt f t.Stack or Outlet: 0'Plume Reading Source Condition:

I I Upset I INormal Point f+I Plume Direction:

-->Observer Position X Sun Position PERCENT OPACITY PERCENT OPACITY Time 00 I 30 I 45 Time 00 15 30 45 Comments: Highest Average Opacity for 24 Consecutive

'bservations Applicable Emission Standard;.

I Opacity Source is'in Compliance with Emission Standard?Yes I I No" Signature of Observer.Jbserver's Certification Expires PV2IS.fj00 PEV 8/82 58d A Ot-.

.