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HomeMy WebLinkAboutWQ0006640_Regional Office Historical File Pre 2018GROUNDWNTER SECTION GW " DIVISION OF FNVIROt,,UENTAL MANAGEMENT =RE C=O R =D F =WASTE SP =SA L=P =ERIT =AP=IC =AT=Vl REVIEWATE FIE INVESTIGATION? ' LOCATIONFACILITY NAME COUNTY TypE OF DISPOSAL SYSTEMICI. m p r �� r �'�DESIGN F�� . 0 `, 7 y,fi.' gp� ep #d ig $ {„" :.'. "P"?'.g '` � `✓. ^� I Y lea e,^""` : ! tt w "e, DESCMPnO SIP m 4 A S UI E: UI . U w e I 'ATEI PIS! I t Al ` TERTIARY []IND. SLUDGE INN, W. WATER THEIRS d DISTANCE FROM E SOURCE TO NEAREST: STREAM ,, WE ILL L"? J FOR WELL' E OF USE DEPTH PUMP RATE EST. WHAT DESIGN CONDITIONS WILL�149*ASE-CHANCE OF GW CONTAMINATION: d �.. r ,� .1,�." _ �` •he'd' Y'€€�`L'� z," �',r*j. '•+t-�r.�" ..��"�;��::.,+'� �'�'"' �•'"`,�Cµ' WHAT NATURAL SITE CONDITIONS WILL 3jpQU / INCREASE CHANCE OF GW CONTAMINATION: DEPTH T- BEDROCK FT. , SEASONAL HIGH W,1 :� ET, � ANNUAL , Tm FLU � ' ET, SUI FI IAL AQUIFER IIEEC E R K ARTESIAN AQUIFER Al Eli: Ln—HOLOGY z MEASURED FT /DAY MEASURED ESTIMATED THICKNESS . OF ]MONITOR E 11ROPOSED. UP OWN � . EXISTING: UP DOWN FROM 1 PI SHE P SITE NUMERICAL DESCRIPTION _ T 1 2 S. GRADESITE iI E L SITUATION GRADE PROPOSED SAMPLING SCHEDULE PARAMETER(S) ; _ > `; ' mtiA iP n � `�-w 1"`.✓}.a i {�`�( Yd�ll Jr f ! a"k, i fl i.-.✓ � �".". # ._1 a mHYD. REGIONAL SUPERVISOR ME ol MC Engineering spar rat 12 Mr. Don Safrit N.C. Division of Environmental Management meat Water Quality Section 512 forth Salisbury Street 1, a - 0535 Raleigh, Noun Dear ikon: confirming our conversation of may 29, we are enclosing the necessarybackup materials for Spray Application Permit for the Harrisburg Road Landfill which are; as follows: 1 Application for Permit ) Drawing of Monitoring and Locations () Backup copy of Calculations () Drawings: raver Test Data from representative water samples ursdwat contour asap a) Site locations d site access Plan; ) To reiterate, as 1 mentioned over the phone, due to the lack of cooperatioirstsn with t we, have b unable t a discharge the waters from our ash onofill lad y en though qualitatively acceptable, the issue rather lies in the fact that they are unable to handle large volumes of water at any one plant. We have tried to resolvethis ratter its every other way possible, on a local basis, however unable to, d as a result f several conversations both with our 1 environmentalpeople and mikeParker of the Mooresville Office, we believe this is out only legal twhich l a part method the ids spoil l also one which could have great benefit to our coif s Please let us know if you need any additional information if we need to meet its Raleigh or here on this matterW is rel ,, Steve er, Division Manager Environmental Services & Maintenance SK/vlt Enclosure $400.00 checkno. ioi9860 North Carolina Z8202 At` PrPT, Or NAIMRAL VNII 3 199,02 State of North Carolina ] rt nt f r r n nt alth, and Natural s * v fM"VTfR1%t� ,tT t M �tf .. l sa o f neon i t Management � r� m lint n-z% t— H] r R � F1t � "� USE F�R� g � A'TION DISPOSAL SYSTEMS SPRAY IRRIG OR (FOR SPRAY i sRFt� F4' TREATMENTFi "°tits} 1 'FORMATION: t r je k enbu C _ullt pl,"aist rpra9+i� print owners or Signing official's N,,arne and Title (the, persOrl who is legally •�- and its rr�pl��ar� BobbieShields responsible �`� the f�a�.ty Director off En inerin . IvIailling .d&dss; 700 North Tryon street Zip. Charlotte t w .. fa lia o sta lishmenat nam4. sl c tld n i t nt itl Pr l t Name u 'vr�t � entnt�s, t�.�. Projectnartl: can plans/specs., ltttr f t�? apt, operational Harrisburg Pad Sanitary Landfill S. ppliadn Date: April 20, 1992 6. 7. County where project is located: Mecklenburg nutg* dd ss trn nt and spray facility. 1 Harrisburg Road 9. brad C t Longitude. i f spray fields Permit NO. (will be completed by DEW* r rt "A'al k mrad% i ctit t , ., Specify r a t is: new; gh III and applicant si natur If renewal, complete only sections I th (original and ac n in r n pttsrrttn p lnt�al� signature not rired for FORM- SIDS 4/9 SPRAY IRRIGATION SYSTri-M PAGE 3 (4/9 1) 8. volumeof storage provided, — gallons; Yields: — days NOTE: A n-dnirnum of 5 days storage must be provided in the pump/storage tank. 9. Volume of pump =k: _ gallons; number of pumps in pump tank 10. Capacity of pumps in pump tank: I GPM 11. Specify, high water alarms provided: _ audible and visual; auto dial G 11 Specify the, following information for the spray nozzles: — psi; — P1 13. Spe6fy the loading rate recommendation, as dtterminy the soils scientist: — inches per hour-, _ inches per week; inches per year 14. Specify the square footage of the wen ed irrigation area: square feet and cover crop: 15. Specify the loading rate that gill occur On the spray 4niga6on field: —inches per hour* _inchesper week; _inchesper yew 16: nt p70jt-_1 must conform to the foilo-,ving buffers (and all other applicable buffers) - a) 400 feet between vx,erted area and any residence under separate ownership; b) 150 feet betv,,ten werted area and property lines, 200 feet in coastal areas; c) 100 feet t>--tweenwened area and a potable ell; d) 100 feet bctmfieen wenarea and d.-.: nage ways or swrfacewaters; e) 50 feet berweentned area and public right-of-way ; f) 100 feet bets wastewater 7eatment units and a potable well; g) 50 feet between wastewater c7eaznenit units and property lines. 17'If any of the buffers specified in no. TV.16 above are not in met, please explain how the proposed buffers will provide Nu2l or better protection of the Waters of the State ith no increased potential for nuisance conditions: 18. NOTTE: If eXCaVatiOn into be&ock is required for insia3lation of the septic tank or sand filter, the, respective pit must be lined with at least a 10 mil synthetic liner. The engineer's signature and seal on this application acknowledges a commitment to meet this requirement 19. The spray irrigation field must be fenced with a minimum two strand barbed wire fencing. Briefly describe the fencing 3 oft PAGE' l l If any cable buffers are not `being Met,, pl as t plal4how, the f thy. apli ors ill r°i equal r better prtcti�art f � airs the tt with proposed '�"�' no W increased potential for nuisance, conditions: facilities rest dust sr cu tt sm fashion rit uuthuri entry. riff° dscrib the measures bits t pr Ft. chain Fey secondary limits t atrrt t facility capable_ f treating the rasic °at t t least 14, I I prior to stcra m; � °� z if not, what 1N,1 f :� Fecal �lif clrttsB� ��. achiveda fields locate ftlaixt I •far flood plain?Ps 15. �' treatment facilityr sg taken tc� prt�t ct airstfl �; - If yes, briefly d sc � thepr t cdv ,�, astir s ici List the field f �' spray fields that are located in area where the seasonal hiEh 16 water table is less than if t bow the sttrrfac a/ 'ded if 1Describetl°� disifcdt�; facilit�s that � Pro,,,,urts.stac •as w°ate. s. APPLICATIONTHIS PACKAGE VILLs NOT DIVISION Oi f O ;%I MANAGE'MENT UNLESS ALL OF SI)SMITTAL IS ARE INCLUDED WITH THE THE APPLICABLE ITEN, Required Perns appr riatcl e ...ut d application f a. and rt original d th cps f he cu�lart accordance rdat� with l 3 F . appropriate' Permit processing fees urdetailed lays and specificationssigned and said b a NorthCarolina rnap, C. Pe sets of dtap PTo fssinal Engineer, It plans mint include nral location map, tp a c h indicates Bahr burins r hind air samples �r. taken, a map site map lttc Oath all showing the land application site, buffers, tr?acttars, and property lines, also pp 00 wells, surface waters i . dear flood , and surface drainage feat elevation), ures it ire t he feet f the land application site- ach shut f the plans and thy. first pase of . specifications must be signed and seal ed f 10 GE / Name aid Cormplete Address of Enginetring FL- : Mecklenbur Coull-ineerj 700 north Tryon Street: City: Charlotte State: N, C Zip; 28202 Telephone No. (704) 71 w. n North Carolina Professional Engineer's Registration No. 7941 Print Name ofEngineer- David Morton v CARn,µ lr- andSignature (specifydate; " wl x o 424 Allt "fie Applicant's Certification: p Bobbie Shields � attest that this application for rrl b r Road Landfill Ash Mail ray lrrl ttt has been reviewed by me and is accurate and complete to the best of my knowle4ge. I understand that if all required pans of this application are not completedcompleied and that if all equ ed supporting information and attachments are not inch,,ded, this application package will be returned a incomplete, Signature Date THE OMPLET APPVCA I . 1 PACKAGE, INCLVDINGALL SUPPORTING ISFORYATIONANDMATERIALS, SHOULD BESESTTOTHE FOLLOWING ADDRESS: NORTH A LIN DIVISION OF ENVIRONMENTAL MA,S"AGEMENT WATER QUALITY SECTION PERNMITS AND ENGINEERINGlei POST OFFICE BOX 29535 512 NORTH SALISBURY STREET RALEIGH, NORTH CAROLIN ft J � do 4;_ USWw 0 6' i Y haiWIa t hbi°W9ah°sti % / � , i1 kr+ -p. i [ i � t r ,;� hC av,� x . id 10 X1 � h a'" 1 4'" � �„ � hay a"r +, h t J to .�� of t :�:bF9Cli5.. `,,.5q. � `*.�** M•etlaitt`I:alBt „"�a tits iav 12 1 hba • aumt,0.0i 4*4 Swnr.c. veo. yr Swig .rs N*Atk.r haF a,jYai irw a3 M.av+ats.fa F1004 L.&M SOvQ.C9 WA461 bile en .ant"I .wE ppl'a.mo:. uko W.610 D,hpiuoiii CI, Sa.n *ay 'Y"Pr000scd star k -wnt .r site Fig r , --e!ojjj toriiig wells , ur n'co—war r Vionitraring, site and ian wn to disposal cells of or near 14mrrisburg Road landfill. t HARRISBURG ROAD IL SPRAY IRRIGATION APPLICATION ' +,t*VtWNMTAL N't Of (WAOWNTAL WMTM LMOPATORY Pinta .. t ttd Lsb I D.I Source led "tom rltt tao Otc r «# Sa' Ties Ti Me J Uto I tjYSICAL PROPERTIES I N TRH MORGANICS III OPC t S- Color i U Acidity L7 OC/MSStag A Conductivity L - T lien , Oil 4 Gre L-7 p Dilsoly,ed Solids nits Organic kids �� olrtila Lam_ ChloridePhaoot L ftadMorino. Rant al L7direct photometric Sosps dad Solids 7_ Oistalw Oxygen L7 thionform extract ton b Volatile fluoride L7 ilCO o� Fixsd Spada% 00.:: o, Total Solids o oloctrado Sorfattaots L7, Volatile 7 mitrats L7 TV N NERAt REtALS, sFixedUv Spot T arxt Nr! o td tro t old w %rbidl y �_ J �� Ammo NIt gvi L7 MqAt a Mardnoss Li_ titrt" rit slariatioo *�.00 VI CYEWCAL COWSITTON Kj#ldahl Nitrogen L '✓ igS S sp rs o Ws`pitj VII RADJOACT111tTYopm Poe Vtatrr rbiai #t V TMIC METAL - Alpha L7 Sulfid*47 Gross Ilauill o Air VIl R Rt I Pd Gtoss A1Ptsa' i feC&I Colifo ,. IL, DOI Fi* Sross Rots i Total COlifOrs 47-110041 os oolifo yyy$$$r Y1:. t �w total Strop 110041 Pb o0 10041 v c'. i � a .... .,�...�-4,.,. v M v � X ! • r♦ s n '"s Imo. } 3F r�:i X } }"t IIIIII rIrII�� X dM y V4MRAY. 3,92 HARRISBURG ROAD LANDFILL SPRAY IRRIGATION DISPOSAL SYSTEMS APPLICATION This report and the corresponding attachments are submitted to Satisfy permitting requirements associated with the Spray irrigation Disposal Systems Application for the disposal of ltachatefrom an Ash Mon fill Facility. The Ash Monofill is a landfill facility which is environmentally designed to accept Solid Waste Incinerator Ash from Mecklenburg Count y's University City Resource Recovery Facility. The Ash Monofill Ls located in the western corner of the existing Tarrisburg Road Landfill which is in the eastern part of the County, bounded by Harrisburg Road to the east and by a Norfolk Southern Railroad line to the South (See attached Site Description Map —as surveyed by David M. Lucas, FeV 25, !965.) EKKIi-AMENA02MIN7 The Ash Monofill consists of an approximately 2 acre landfill cell which is lined with a synthetic memirane underlain by a lAr permeability clayey soil layer. with an integrated system of pipes and finger drains for the removal and collection of leachate from the cell. The leachate is collected in d lagoonn) with a full pond capacity of 350gal ,000 lawns. For the calculat-WQ: rate of wastewater volume of 5500 gallons per day, the lagoon s. a maximum storage capacity of 63 days. (See Law Environmenta Drawing 6, "Site Development and Operation Plan," for details 0nd­-,,,,' infer" ation,) After carefully reviewing and evaluating the attached leachate analysis reports, Mecklenburg County seeks to dispose of the le hate by spray irrigation as opposed to processing the lea chate at a sewage treatment plant. This process would involve pumping the leachate from the lagoon to a tanker truck which would transport the leachate to the designated irrigation area for disposal. The to truck has a capacity of 1100 gallons with a pump capacity of 36 GPM and 189 psi Spray Nozzles at 18 GPM. The designated area for spray irrigation consists of two separate areas totaling approximately 5,000,000 square feet and are located entirely within the Harrisburg Road Landfill disposal boundaries (See attached Law Environmental Drawing 1, "Site Location and Site Access Plan"). This would result in a hydraulic loading rate of 0.64 inches per year over the irrigation area. The final topography of the landfill has a maximum slope of 4:1 which will eliminate possible runoff from the irrigation areas (See Attached Law Environmental Drawing 11, "Construction Plan"). Calculations for the metal loadings of the le chat indicate minimal impact upon the site and verify that hydraulics is the limiting constituent for the system design (See Attached Calculations). Site life for the metals are far beyond the anticipated life of the monofill which is currently expected to close in 1-2 years. Following closure of the monofill, a synthetic membrane will be placed over the monofill to reduce and eventually eliminate the creation of leachate. As concerns the soil investigation for the Site, attached is a soil survey for the Harrisburg Road Landfill indicating soil types for the facility prior to landfill operations. This map has changed as landfilling has progressed over the site, and the soil profiles for the wetted perimeter area currently consist of solid waste layers overlain with 6 inches of daily cover and capped with 3 feet of compacted soil. Studies indicate that the typical hydraulic conductivity of a solid waste layer is approximately equivalent to a silty sand or dirty sand, but this varies depending upon the compaction and the nature of the waste. Q: _QQ'N.;A7LL U i I =UIT C)IN With a lagoon holding capacity of 63 days, a disposal area of 114.8 acres, and an average loading rate of 0.64 inches per year, spray irrigation will only occur when weather and site conditions allow it with minimal impact to the landfill. Spray irrigation will occur more frequently during the hot, dry months of spring, summer and fall, and will be kept to a minimum during the winter months. In addition, the Harrisburg Road landfill has several stations for monitoring the groundwater and surface water at the facility (See attached Law Environmental Drawing 2, "Ground -Water Contour Map and Boring Location Plan"). These ststions are monitored and samples are taken on a regular basis, and any impact upon the surrounding environment due to spray irrigation of the site would be indicated by these samples. AL y k5b MUS E I Rog/ y �'q cl _.. .._ god gad .... ;a _...... ._ .`. ppp, ex Ayn OAI r , , rC. rw,, i 3y /ts- M. ear Fop u cost 0 F 17*5 DE; 1 67, ) 330 Y) v I I I 9 N Vu N i 3Al-Lvt\-dDSNZ0 �93n, OV w W ac iO 441-DL40V'O dtVnCl kL / rQ 'Y)n24 '4NVI 0011 A?) —;gr a m p(%iot-L69) 4tclLu 0-1 _;)X�l f ti al-fyy 9H"06;D7 A E/O A v 0 V V Dos S 000 loss 33n oo C) N C8) Lo GROUNDWATER SECTION t,N , MEMORANDUM A ') 3 f992, TO: j-0ex'L DIVISION or DATE: 0C A CA L OFFICE FROM: Jack Floyd SUBJECT:' Application for _Renewal /Amendment of Permit No. - New Permit Facility Name e Xe--11 1'/4 County Type of Project: 1 �141 Central Office Contact: Applicable Permit Numbers: 61 ee VI) GW 9,zzo EPA AC We have received a copy of the above referenced application, which was sent to your regional office for comment on or about 19qZ N-1 0 . .... . .... 1101 a If you do not require additional applicant to complete information from the review the your evaluation of application package and submit the project, you should 9 your comments to me by I f a--4py available the application package to your office, PLEASE has not been madc- a copy can LET ME KNOW be forwarded to IMMEDIATELY so that You as soon as possible. JF - ;a/An n To: Permits and Engineering Unit Water Quality Section Date: July 29, 1992 NON -DISCHARGE STAFF REPORT AND RECOMMENDATION County Mecklenburg MRCS No.: -14 Permit No. WQ0006640 PART I - GENERAL INFORMATION 1, Facility and Address. Harrisburg Road Landfill Spray Irrigation WWT 700 North Tryon Street Charlotte, N.C. 28202 -. Late of Investigation: July 28, 1992' 3. Report Prepared By: Michael L. Parker, nvi ron . Engr. II 4 Parsons contacted and Telephone Number: Mr., Steve K l net , 7 4 - 71 ., . Directions to Site: The entrance to the Harrisburg Road Landfill is located on Harrisburg Road 0.5 rile north of to intersection of Pence Roadand Harrisburg Road in the city of Charlotte. 6. Disposal ite(a), List for all disposal sites Latitude: 350 1 ' 1 " Longitude: 800 41' " Attach a USGS Mar Extract and indicate treatment plant site on map. USGS Quad No.: U 16 NW . Size land available for expansion and upgrading): There is 114 acres of landfill area available for spray irrigation. Additional Additional acreage is available on an adjacent golf course, if needed. 8. Topography' (location map or topographic indicating relationship to 100 year flood plain included). The site is not located within the 100 year flood ,plain. Slobs range from _ % within the disposal area. The ,proposed) site(s) will be graded to a uniform slope (less than 4 and seeded with a cover crop prior to spray application. . Location of Nearest Dwelling and Water Supply Well® The nearest dwelling is 1000+ feet from the site. The nearest water supply well is 1 feet from the site. rshed Stream Basin Information: Watershed Classification; C River Basin and Subbasin No.: Catawba 030834 Distance to sutfact water from disposal system: Approx. 860 feet. DESCRIPTION OF DISCHARGE AND TREATMENT WORKS of wastewater; 0% Domestic 100% Industrial (landfill leachate) a. Volume: 0,0055 MGD (Design Capacity) b. Types and quantities of industrial wastewater; The wastewater is lea hate from an ash monofill. The ash comes from a solid waste incinerator at Mecklenburg County's University City Resource Recovery Facility. The quantity of wastewater will be dependant on the amount of rainfall received on the monofill. C. Prevalent toxic constituents in wastewater: Trace amounts of various metals have been detected in the leachate, however, the spray irrigation project should only last 1-2 years, and will not approach the projected lifetime metal loadings. d. Pretreatment Program (POTWs only); N/A in development approved should be required not needed 2. Production Rates (industrial discharges only) in Pounds Per Day: N/A 3. Description of Industrial Process (for industries only) and Applicable CFI Part and Subpart: N/A 4. Type of Treatment (specify whether proposed or existing); There are no existing wastewater treatment facilities nor are any proposed. The leachate collects in an underdrain collection system, and, is discharged into a leachate storage removed by pumping into a tanker truck for disposal. 5. Sludge Handling and Disposal Scheme: No sludge generation is anticipated. Should any solids collect in the storage basin, they will be disposed of at the landfill prior to the closure of the monofill. 6. Treatment Plant Classification; Less Than 5 Points; No Rating (include rating sheet). No rating Page Three 7 SIC Code(s) : 49 Wastewater des) Primary; 72 Secondary: PART III -'OTHER PERTINENT INFORMATION' l;. Is this facility being constructed with Construction Grant Funds (municipals only)? No 2. Special monitoring requests- None at this time 3. Air Quality and/or Groundwater concerns or hazardous waste utilized at this facility that may impact water quality, air quality, or groundwater'No AQ concerns nor is hazardous waste utilized at this facility. GW is being monitored around this site through a network of monitoring wells. GW comments should he obtained prior to permit issuance, PART IV - EVALUATION AND RECOMMENDATIONS The applicant (MecklenburgCounty) request approval to spray irrigate le chate from an ash monofill onto a solid wash landfill that is being converted into a golf course. The County previously discharged the leaohate into a City of Charlotte municipal T facility, however, the City discontinued this option due to hydraulic constraints at the WWTP. The adjacent (closed) landfill is being landscaped in preparation for establishment of grass for the proposed golf course. The existing leaohate storage basin is capable of providing 63 days of storage, if necessary., The County has proposed a hydraulic loading rate of 0.64 inches/year, which should be well within the capability of the soils fund on the site. The lea hate will he applied by a sprayer (connected to a lg gallon capacity tanner truck) onto the golf course fairways. The application rate will he met through a combination of application vehicle speed and the speed. of the spray pump (preset). The County hopes that most of the spray application can he performed during the summer months is provide golf course irrigation. Mineral and heavy metal should not be a limiting con When the monofill is full e corer will be placed over th of rainwater into the ronofi generation of leachat . Page Four Pending review and approval by the and concurrence by the GW Section, it is recommended that a Permit issued. Of i n tur rt PreparTr t Water Quality► Tonal Supervisor fat __ �r. �ft``;,''�^�« `� '.�� � ,ram-�—�� * �',�a""�.,w, ki m• �, �� .� w � k i' dui + W 4,° . w� 6,t we. HARRISBURG ROAD, LANDFILL Index to MaP Units lr-lredell tins sandy loam, t to 5 percent slopes ApB—Appling sandy barn, 2 to B�p rcent slopes � Irsdell-Urban land compl! , 1 5 percent Apo—Applln sandy loam, 5 to 15 percent slopes slopes 52 ecll sandy clay loam, 2 to 5 percent LqB—Lignurn gravelly. silt loam, 2 tb 5 percent slopes, eroded slopes to I percent e 2 ec}l sandy clay loam, e -- Mecklen r fuse sandy loam, 2 to 8 percent slopes, eroded slopes ecll-ilrban land complex, 2 to percent lie deckle bur fine sandy loam, 5 to 15 slopes Cecil -Urban land comple , 8 t0 ,S. percent l �k el ecklen ¢l rban land complex, 2 to slopes, 02B -- avidson sandy clay loam, 2 to a percent; percent slopes slopes 1�j Monacan soils, a slopes an,�y clay barn, l0 15 pescen t1,5 l ;onacan soils and Abrams slopes aE--Pacolet sandy loam, I5 to 25 percent slopes a Davidson sandy clay loam, 1510 25 percent PaF-pecolet sandy loam, 5 t0 percent slopes slopes P52 acolet_Udortnents complex, gullied n 'non sandy to re, 2 to 8 percent slopes Pt Pits pn—non sandy loan, 8 to 15 p scent slopes ill. - �rlhents, loamy ° e 2 eorpe llle silty clay loam, 2 to 5 percent UO—1 dorth nls, sanitary landfill slopes, eroded e 2�- eor eville silty claVa y loam; 5 to 15 percent B_oan lead to percent slopes slopes, eroded Va6rance Sandy loam, 8 10 15 percent slopes r oldstrslaty silt barn, 210 percent Va Vanoe sandy loam, t �k --Wilkes loam., to percent slopes slopes Goo- oldston slaty silt loam, t0 15 percent ` 'k Wilke loam, to 1 percent, s;opas slopes VAE—Wilkes loam, 15 5o Z- percent Slopes He -Helena sandy loam, 2 tC7 percent slopes - 'rlkes loan, 25 to 5 percent slopes HuB-Helen -Urban land comple , 210 8 percent Wilkes -Urban land complex 5 to 1 percent slopes slopes IrAlydell fine sandy loam, 0 to 1 percent slopes