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Home My WebLink AboutNCD980602163_19960930_Warren County PCB Landfill_SERB C_Supplemental Site Investigation Plan-OCR.BF A Environmental Consultants Barnes, Ferland and Associates, Inc. MEMORANDUM TO: FROM: DATE: SUBJECT: Bill Meyer September 30, 1996 Requested Response to Peer Review Comments Received 9/24/96 BFA#95-0l7 I was under the impression that the proposed supplemental sampling and testing activities had already been agreed to by both the State ( our July 3, 1996 meeting) and the Working Group (our August 27, 1996 meeting). I don't believe the project schedule will be best served by addressing the S&ME peer review comments, in particular, at this stage. Moreover, It is difficult to respond comprehensively to these comments when I don't know the peer review ground rules .For example, I am uncertain which of the three drafts I submitted to the State was peer reviewed and if the individuals performing the peer review were also given all the background data which we have. We (the Science Advisors and the Working Group Technical Committee) are puzzled as to why the State submitted their April 26, 1995 proposal for comparative review, especially when the basis for the current proposal was jointly agreed to. It is my opinion that these issues should be addressed prior to a formal response, hopefully that will occur at our next meeting. PAIJ,psgi 9-30WJv.f2.doc cc: Technical Committee The Hollister 8u1ld1ng • 3535 Lowton Road· Suite 111 • Orlando . Flori d a 32803 ,1H,,,...o. iA,n7 \ QI~ AC:.(lA.. t:'·:.v /An7 \ Oo~ "I o·-)'7 · .. · _ ". State of North Carolina • Department of Environment, Health and Natural Resources Division of Waste Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary William L. Meyer, Director fo : ~d.--Hrfls~~ +1 \()~ ~ 61 £0 r\\ £,((~ (~1 \?CB })6-rb( ~~ .A.VA DEHNR 7-v1. Y. e ti q, c10 '>f1 ·ftJCJQ;,t?D MG-~ RYt-cm,n111a:Jr5 RHW\ ~TlffGlfH31rTT,Jctl,rl~ ·· 1S tJ / A~ 1 ?~¥ (oocs I s~,;.{/()(_,~) •, &U (!()15:,nmal; s-v&Cf'CNi 1G (!;f)UQ/l /2J91Y6G:-'fJ6<SeJGiJ R?v ;u,J,,f~1)lf1"a.N t/Jl'./JR~,O!U>fd? · · AfU= rJ1DL:5 snOtt,-rrVf-; .• 11/~S -w-70 : ll!:,P~ A-1 CYUI.Ar A, wlfli,1, /J1Cls <;Ot<-6 -111/)l,s w11e,, 4,,t., /flCC$ r,,-~~IK7 kl~ • D/b",<I N / r:qA--IJYl5 -,,<.Au-use-Tl2llrll&6-~s-1 /Ill* lau'f It.ti'!> $ Al&~✓1~ pu<!.6-~ ~o j~u, OM tJc--,te'lS 6fA5-N5:1ve. If i6f/l-/f--o~i-HJ fwwWii/_, VI/G-' 111-IN/r 4u., tStJM&'t5 W /JtBM f4/l, f:/1J6Gt2-fY2t;lr jJtif1uJe-J? A-1v~mc¥-- M1!5llf rtc;r;f Pct ?f//l_/J./j6fLs vo (!_,, :int~ Vo/f,. ~.JfR/J,rt11~ 00# Al /fit11,~":> P.O. Box 27687, c;wfJlf; A-tU9L y 11 ~ di~ J ~D8-,;/So8o gz,o f;Z7D 8tJ3/-g/tf/ !Zt/J., l~/1 tnPv w~ 0.//Jl)6 ~l?,l-o, I fr.;fl\ Sec C/9C IJI/J/fl,~ J FAX 919-715-3605 Raleigh, North Carolina 27611-7687 Voice 919-733-4996 ff MA•MJMN An Equal Opportunity Affirmative Action Employer 50% recycled/10% post-consumer paper BASE/NEUTRAL ANO ACID EXTRACT ABLES COMPOUND N-nitrosodimethvlamine bis(2-chloroethvl)ether 2-chlorophenol ohenol l.3-dichlorobenzene l,4-dichlorobenzene l.2-dichlorobenzene bis(2--chloroisoorcpvl)ether hexachloroethane N-nitroso-di -n--0roovlamine nitrobenzene isoohorone 2-nitroohenol 2 4-dimethvlphenol bis(2--chloroethoxv)methane 2 4-dichloroohenol l 2 4-trichlorobenzene naohthalene hexachlorobutadiene 4--ch 1 oro-m--creso l hexachlorocvcl~ntadiene 2.4 6-trichloroohenol 2--chloronaohthalene acenanhthvlene dimethyl phthalate 2 6-dinitrotoluene acenaohthene 2 4-dinitroohenol 2 4-dinitrotoluene 4-nitroohenol fluorene 4--chloroohenvlohenvlether diethvl ohthalate 4,6-dinitro--0--cresol diohenvlanine azobenzene 4-branoohenvlohenvlether hexachlorobenzene pentachlorophenol phenanthrene anthracene dibutvl ohthalate fl uoranthene J -Estimated value. STATE LABORATORY OF PUBLIC HEALTH P.O. BOX 28047 -306 N. WILMINGTON , ST ., RALEIGH, N.C. 27611 ORGANIC CHEMICAL ANALYSIS LAB NO FIELD # TYPE ( ) ( ) ( ) ( ) UNITS lo/!l=ltJ I .lfi:J/1/-"-rt l✓o/ ~:fl'J ~/Jti,Sb /0/.._?30 I 'if S'O/J/450 1ril~~ . ' .t;;,/JJ,.<n 10/~'.:lrJ ,, ml> L. H2.0/.SOIL K -Actual value is known to be less than value given. ( ) L -Actual value is known to be greater than value given. U -Material was analyzed for but not detected. The ntJTber NA -Not analyzed. is the Hininun Detection Limit. ('ml>L..) -... ---- 1/ -Tentative identification. fl -On NROC List of Priority Pollutants. ( ) BASE/NEUTRAL ANO ACID EXTRACT ABLES (X)Mf'OONO ovrene benzidine butvl benzvl ohthalate benz(a)anthracene chrysene 3 3-<lichlorobenzidine bis(2-€thvlhexvl)phthalate di-n-octyl phthalate benzo(b)fluoranthene benzo(k)fluoranthene benzo(a)ovrene indeno(l 2 3-cd)ovrene dibenzo(a h)anthracene benzo(q h i)oervlene aniline benzoic acid benzvl alcohol 4-ch loroani 1 i ne dibenzofuran 2-ffl?thvlnaohthaleoe 2-ffl?thylphenol 4--methvloheool 2-nitroani line 3-ni troani 1 ine 4-nitroani line 2,4,5-trichloropheool J -Estimated value. STATE LABORATORY OF PUBLIC HEAL TH P.O. BOX 28047 -306 N. WILMINGTON, ST., RALEIGH, N.C. 27611 ORGANIC ~E111CAL ANALYSIS LAB NO FIELD# TYPE UNITS ll'\/?_-:::fr> :'50//1-<n Jo/~':ll') ,1 9)) I/A l:jrJ JfJ)'~~ 111/:{</l ! ,<",n /J1_ <"n . ,1 -J,a/J(,.~ ' I 1nJ ~=ui , ,, ----'!,,',.~" K., , 'I 1~1-11\ H"2-0/.SOtL ( ) to be less than value given. ( ) ( ) ( ) ( ) K -Actual value is known L -Actual value is known U -Haterial was analyzed NA -Not analyzed. to be greater than value given. for but not detected. The nurber is the 11ininun Detection Limit.(rr\2)L-) - --1/ -Tentative identification. fl -On NROC List of Priority Pollutants. ( ) I STATE LABORATORY OF PUBLIC HEALTH PO BOX 28047-306 N. WILMINGTON ST .• RALEIGH. NC 27611 ORGANIC CHEMlCAL ANALYSIS PURGEABlE COMPOUNDS I LAB NO I I I I I FIELD NO COMPOUND TYPE ( ) ( ) ( ) ( ) ( ) MDS)4> {ppb ppb ppm tl>b ppm. ppb ppm ppb ppm ppb ppm. CHLOROME"rHANE JO VINYL CHLORIDE 10 BROMOMETHANE -o d. CHLOROETHANE iO TRICHLOROFLUOROllETHANE ,o ACETONE ;;J.O 1.1-DICHLOROl!:THENE 5 IODOMETHAlfE METHYLENE CHLORIDE CARBON DISULFIDE TRANS-1,2-DICHLOROETHENE J; ACRTI.ONITRILE ~ 1, 1-DICHLOROETHANE 5 2-BtrrANONE ;)_D Cls-1,2-DICHLOROETHENE 5 CHLOROFORM ' 1.1.1-TRICHLOROETHANE CARBON TETRACHLORIDE BENZENE 1,2-DICHLOROETHANE TRICHLOROETRiNE 1,2-DICHLOROPROPANE BROMODICHLOROMETHANE t c-Po~~.~~ ... r.r,; c--:.-l'!TAi'll1NAT io1'l o .R B.HcJ,::.6-P-c..il\..lD. J -Estimated value X -Actual value is known to be less than value given. L -Actual value is known to be greater than value given. U -Material was analyzed for but not detected. The number is the Minimum Detection Limit. NA -Not analyzed. 1/ -Tentative identification. 3./ -COMfoY.r.iD REL-\ A6L.'f OE-T fc:T"f\BU:.. C~i.¥ IN fHcH lcNl£NTRFJf1c:N".i. V-SAAPL6. Hlfi'HL.'f PILIATE.D. /"10~'$ Oo r,l,ct,f+fl'Lf. DEHNR 3065-0 (10/93) I I ( ) ppb· fPrr? PURGCOM.ORG I STATE LABORATORY OF PUBLIC HEALTH PO BOX 28047-306 N. WILMINGTON ST., RALEIGH, NC 27611 ORGANIC CHEMICAL ANALYSIS PURGEA.BLE COMPOUNDS I LAB NO I I I I I FIELD NO COMPOUND TYPE ( ) ( ) ( ) ( ) ( ) t ,~~5 ppb ppm ppb ppr,1 ppb pprn pp b ppm flJb pp,-n DIBROMOMETHANE 5 4-Ml!:THYL-2-PENTANONE ,o CIS-1,3-DICHLOROPROPENE 5 TOLUENE TRANS-1,3-DICHLOROPROPENE 1,1,2,2-TETRACHLOROETHANE 1,1,2-TRICHLOROETHANE ,v 2-HEXAlfONE ;o TETRACHLOROETHJ!:NE 5 DIBROMOCHLOROMETHANE ETHYLENE DIBROMIDE CHLOROBENZENE 1,1,1,2-TETRACHLOROETHANE ETHYL BENZENE XYI.ZNES STYRENE '\ ; BROMOP'ORM i O TRANs-1,4-DICHLOR0-2-BUTENE i o 1,2,3-TRICHLOROPROPANE .._J:j 1,4-DICHLOROBENZENE I 1,2-DICHLOROBENZENE '1t 1,2-DIBROM0-3-CHLOROPROPANE ~t) VINYL ACETATE d-CJO -C -i>c,-:.'."",-(")LE:: l-RB cc:,l",,'.\r,l.1}J (ln C.,:\J o R B Picl:;.C,-KC·UN l), J -Estimated value X -Actual value is known to be less than value given. L -Actual value is known to be greater than value given. 0 -Material was analyzed for but not detected. The number is the Minimum. Detection Limit. NA -Not analyzed. ):_I -Tentative identificati on. 3-1 -c OMPo U.J-,iD R~LlP.BLV D6T'EcT f\\3LE-t,,\J l..Y iN Ml<i-H {CJdCfN"iRAT iC,\).•_;_ ✓·· ~.-ii-lPus: H Hd-lLY l);'U,Tf:D . Mf;'L1~ Do l\/Jt" fV't;_•-f. DEHNR 3068-0 (10/93) I I ( ) ppb ppm PURGCOM.ORG N. C. DEPARTMENT OF ENVIRONMENT, HEALTH, & NATURAL RESOURCES DIVISION OF LABORATORY SERVICES, ENVIRONMENTAL SCIENCES SECTION P.O. BOX 28047 -306 N. WILMINGTON ST, RALEIGH, N.C. 27611 Laboratory No. PURGEABLE COMPOUNDS Date of Analysis _____ _ COMPOUND µg/1 COMPOUND Dichlorodifluoranethane ✓Chlorobenzene Chloranethane ✓Ethvlbenzene v'Vinvl Chloride 1. 1. 1.2-Tetrachloroethane Brooanethane ✓o-Xvlene Chloroethane ✓m-Xvlene Trichlorofluoranethane ✓o-Xvlene ✓l.1-Dichloroethvlene ✓Stvrene Methvlene Chloride Branofonn tert-Butvl Methvl Ether Isooroovlbenzene ✓trans-1.2-Dichloroethvlene l 1.2 2-Tetrachloroethane Isooroovl ether Branobenzene 1. 1-Dichloroethane n-Proovlbenzene 2.2-0ichloroorooane 1.2.3-Trichloroorooane ✓cis-1 2-Dichloroethvlene 2-Chlorotoluene Chlorofonn 1.3.5-Trimethvlbenzene (BCH) Branochloranethane 4-Chlorotoluene ✓1.1.1-Trichloroethane tert-Butvl Benzene 1. 1-0ichlornnrnnPne Pentachloroethane ✓carbon Tetrachloride 1.2.4-Trimethvlbenzene ✓Benzene sec-Butvl Benzene ✓l.2-Dichloroethane o-Isooroovltoluene ✓Trichloroethvlene 1.3-Dichlorobenzene ✓l.2-0ichlornnrnnilne ✓l.4-Dichlorobenzene Brooooichloranethane n-Butvlbenzene Dibrooanethane ✓1.2-Dichlorobenzene ✓Toluene Bis (2-Chloroisnnrnnvl) Ether 1.1.2-Trichloroethane l 2-0ibrano-3-Chloroorooane ✓Tetrachloroethvlene l 2.4-Trichlorobenzene l.3-Dichlornnrnn.1ne Hexachlorobutadiene Dibranochloranethane Nanhthalene 1.2-Dibranoethane (EDB) 1.2.3-Trichlorobenzene 1-Chlorohexane MDL -Mininun Detection Limit for water (EPA Method 502.2), is 1.0 µg/1. J -Estimated value. K -Actual value is known to be less than value given. L -Actual value is known to be greater than value given. U -Material was analyzed for but not detected. NA -Not analyzed. 1/ -Tentative identification. ✓ -Re9ulated voe T -Tr1halanethane N.C. Dept. of Environment, Health, & Natural Resources DEHNR 3068-0 (Rev. 10/92 Laboratory Services) #l532E D-18 µg/1 State of North Carolina Department of Environment, Health and Natural Resources Division of Waste Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary William L. Meyer, Director .A.TA DEHNR 1D. · PCB Tr;,c II• ~111t1J 1/f£v fz~i< /4 ~ ttlbf&v 5~~ ~ ~ Co1+ut11~ o/113/t~ ~ f-v ~ 7Jflff ~ IJJC#/J /JI~ f?~a/Lf!S V/VJj,-t?,V /la,t; ~/V ,5J,t}JJ-~~ 9~~ ?/ye Dt/6 ff) 6'/11~ j}?,f)N#IY? M ~h.Sb-Jt ~/ Ji t,<J/tL,, CJG. /J-1 ~/ /fl(ltl/1/&t-~ ~u, W6 Wtt.£, isb Ae:6--/v l)tJNvVf}flJC... 6.lif ~ fh-tR Jo ~l{JJ IAJi}t; ~ ClhH,/ If lsgl,t{5 W'btot? £GM ~ 5~"0 jJJUfrl /1) ~c~ ~ IJlm;tfrt,.c,, ~ /J/IOCIE6{/) /fJ's ~ rGe-;s ~~ .J ~v()1'/t, tft~e,,/v /J~ w#itd✓ "}/Pi:: ~ ;¢1--~ /2~ . v1//"" ~ ~ ~ &,_ u-Jk 1/1,,,, 04~/;t,f) Iv ,J<.¥J~)u, ~ lhfo~m1 &)✓/ut~ J 4mJJU .1L M:1,}~tiJ If,, d w/J1l = P. ?~ /lWjt(, 'i(.J ~ VIU~ ~ W~· ,,--,, . 1 i& I ~~~M> .. ~c,-•~ /,OnatA.; Mo./,1,i -}o t/H,C//,J(Y/; 'f'1; c~~llAJ t~~ Nike P.O. Box 27687, -.; ~ Raleigh, North Carolina 27611-7687 ,-~ Voice 919-733-4996 FAX 919-715-3605 An Equal Opportunity Affirmative Action Employer S0°lo recycled/lO°lo post-consumer paper JOINT WARREN COUNTY/STATE PCB LANDFILL WORKING GROUP ~., 00,.i.,C ~ Knt h--.,,;;oa Hcll/llY ~re/II TO: William L. Meyer FROM: Technical Committee DATE: September 13, 1996 Dear Mr. Meyer: The Technical Committee (Committee) would like to infonn you of some decisions made at their meeting with the Science Advisors Thursday, September 12, 1996. The Committee and Science Advisors (Advisors) have decided to proceed with the sampling plan. If your office has not completed the plan due to the need to contact the land o...wers of the off-site wells, the Committee with the Advisors, have decided to proceed without them. Permission from the land owners of the off-site wells should not hold up the implementation of the entire sampling plan. Therefore we are asking that you fax the sampling plan to the Advisors and the Committ~ by Monday, September 16, 1996. The Committee, on the recommendation of the Advisors) is asking that you send someone to inspect the landfill. Warren County sustained much damage from hurricane Fran and an enonnous amount of rainfall. This concerns the Advisors and they feel that is it imperative that someone inspects the conditions at the landfill. Lastly, the Committee would like to know the status of the Project Officer. We understand that this will be a part-time position at twenty (20) hours per week. If a Project Officer has been chosen, please fax his credentials to the Advisors and the Committee. cc: James B. Hunt, Jr., Governor Jonathan B. Howes, Secetary of DEHNR Joan Weld, Administrative Chief of Staff to Governor Henry Lancaster, Co-chair Joint Warren County/State PCB Working Group Dollie B. Burwell, Co-chair Joint Warren County/State PCB Working Group Ken Ferruccio, Co-chair Joint Warren County/State PCB Working Group 720 RIDGEWAY STREET, WARRENTON, N. C. 27589 TO "d gr:TT 96 , £T das 00012.sc:::x-e..:1 State of North Carolina Department of Environment, Health and Natural Resources Division of Waste Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary William L. Meyer, Director Ms. Ann Borden, Chairperson of the September 3, 1996 Groundwater Subcommittee for the Professional Engineers of North Carolina c/o S&ME, Inc. 3100 Spring Forest Road Raleigh, North Carolina 27604 Dear Ms. Borden: We had talked late last week about the possibility of the Groundwater Subcommittee performing a peer review of some of the groundwater issues the State has with regard to the Warren County PCB Landfill. Our Division Director, Mr. Bill Meyer discussed this with Mr. Don Carter of the Professional Engineers of North Carolina who offered the peer review services of this subcommittee. SCOPE OF WORK The Division staff had put together a workplan ( dated 4/26/95) outlining certain groundwater monitoring upgrades recommended for the Warren County landfill site. This workplan was reviewed by Mr. George Bain, P. G. who provided comments in the fall of 1995. In addition, a Supplemental Site Investigation Plan was prepared (Summer 1996) by the Warren County landfill consultant. The scope of this peer review is to evaluate the recommendations and conclusions in the State workplan, the comments provided by Mr. Bain and the site investigation plan prepared by the consultant. Attachment I to this letter is a list of all the documents included for your peer review. If possible, we would like to have the conclusions of your peer review by Thursday, September 12, 1996. Please let us know if this schedule is not compatible with your work load. Thank you for providing both your time and expertise to this very important project. We look forward to receiving your peer review results. If you have any questions please feel free to contact me at (919) 733-280 I ext. 236. cc: Bill Meyer P.O. Box 27687, Raleigh, North Carolina 27611-7687 Voice 919-733-4996 f #m'§J.JiEJtt=tai Sincerely, Patrick Watters Division of Waste Management FAX 919-715-3605 An Equal Opportunity Affirmative Action Employer SO"k recycled/ 1 O"/o post-consumer paper ... ATTACHMENT I Peer Review Document List 1-Letter to George Bain, P.G. dated 9/7/95 which contains the 4/26/95 State Workplan for Upgrading the Groundwater Monitoring System at the Warren County PCB Landfill along with five other references as noted in the 9/7 /95 letter. 2-Letter to George Bain, P. G. dated 10/9/95 providing supplemental information as requested by Mr. Bain needed for his evaluation. 3-A series of charts showing the groundwater elevations taken from the 4 existing monitoring wells at the site from November 1992 through March 1995. 4-Letter from George Bain, P. G. dated 10/19/95 documenting the results of his peer review. 5 -PCB Landfill Supplemental Site Investigation Plan prepared by Barnes, Ferland and Associates, Inc. , Summer 1996. BF A Environmental Consultants Barnes, Ferland and Associates, Inc. MEMORANDUM TO: Bill Meyer Bob Glaser FROM: Pat Barnes DATE: August 21 , 1996 - ·--1e1 SUBJECT: Additional Analysis of Site Specific Geology _ • .,..~r~·•• As we discussed, I have tightened up what we know about the site's geology based on the very limited information available. Since we have no information on the strike or dip of the saprolite zone which is believed to control groundwater flow away from the landfill, I performed a triangulation analysis of the only consistent lithologic contact identified in the nine (9) soil borings initially performed at the site. Triangulation shows that the top of the brown micaceous clayey silt, which occurs within the upper 20 feet, has a NE strike and dips at a slope of one foot (vertical) for every 50 feet (horizontal). This is coincidental with predominant regional strike/dip features. It also supports the apparent field observation that rock out crops occur at higher elevations south and southeast of the landfill, thon towards the north. This may also represent the attitude of the saprolite zone. At a minimum, it means wells to the north of the landfill may need to be constructed deeper than those to the south. Information in the file states that the saprolite zone is located between 60 and 90 feet below land surface. This appears to be in conflict with data obtained from test boring # 1, which gives the top of the weathered rock zone as approximately 41 feet. Boring #1 is near the apex of the pre- developed site. no other borings encountered the weathered rock material (presumed to be the saprolite zone) even though three (IA, 4A & 5A) were constructed to lower elevations. This supports the notion that the weathered rock zone may represent a subdued reflection of land surface. This analysis has not changed any of the proposed analyses; however, it does support several key assumptions which have been made in developing the supplemental sampling plan and the need for more drilling and testing. PAB/psg/8-2JBMJ.doc cc: Working Group Technical Committee Joel Hirschhorn The Hollister Building• 3535 Lawton Road• Suite 111 • Orlando, Florida 32803 Office ( 407) 896-8608 • Fax ( 407) 896-1822 ..BF A Environmental Consultants Barnes, Ferland and Associates, Inc. MEMORANDUM TO: FROM: Bill Meyer Pat Barnes DATE: August 19, 1996 SUBJECT: Status of Revisions to Supplemental Sampling Plan and Related Matters Since we last spoke, I h~ve performed the following: 1. Added Regional Hydrogeology Section to Plan and tied it both to the local hydrogeology and the proposed well locations. 2. Added three (3) geologic cross sections through the landfill area terminating at the proposed well locations. Because of the lack of subsurface data (e.g., strike and dip of the saprolite zone), several assumptions are made. However, the water level gradient informaiton makes the cross-section still very useful. 3. Obtained a full copy of the new EPA, May, 1996 SOPs. I am using them extensively to modify the drilling procedures and well design sections. I don't think procedures are needed for areas which overlap with the July, 1994 Sampling Plan. For example, in describing the protocol for surface water sampling I reference both the July Plan and the EPA SOPs. Please let me know if you suggest otherwise. 4. Federal Expressed copies (hard copy and on disk) of site map with sample locations as well as the draft cross-sections, to Bob Glaser's attention. These items are draft and I am looking for your input as soon as possible. 5. I have left messages for Bob Glaser, his voice mail indicates he is either on vacation or in the field . Please have him call me when he gets back in. I want to make sure we agree on what direction to take the Plan in and that we are not duplicating efforts. Also, please let me know the status of our July 15th invoice. As you know, cash flow is critical to a small firm! Please give me a call today, if possible. P AB/psgl8-J 9BM J .doc The Hollister Building• 3535 Lawton Road• Suite 111 • Orlando, Florida 32803 Office ( 407) 896-8608 • Fax ( 407) 896-1822 07/18/1996 07:55 4078%1822 BARHES FERLAHD A'::i:31]C 17eJtr1 PCB LANDFILL SUPPLEMENTAL SITE INVESTIGATION PLAN TABLE OF CONTENTS ./ 1.0 BACKGROUND 2 0 .PURPOSE 3.0 SITE SETTING AJ'ID HYDROG.EOLOGY 4.0 SITE LOGISTICS 4. l Site Access 4.2 . Work Zones 4. 3 Site Control 4.4 Decontamination Facilities 4. 5 Field Decontamination Procedures 5.0 SUPPLEMENTAL INVESTIGATIONS 5.1 Landfill System 5.2 Groundwater/Soils S.2 . t Drilling Procedures 5.2 .2 Monitoring Well Design 5.2.3 Testing Procedures 5.3 Surface Water 5.4 Sediments 5. 5 Surface Geophysics 6.0 ANALYTICAL TESTING 6. l Matrices and Analytes 6.2 QA/QC . 7.0 REPORTING BFA,Du11e BFA)Jone BFA,,Done BFA_,70% Complete DW!vf or Joel H. ? BFA,,Done PAGE. O.l • WARREN COUNTY PCB LANDFILL SUPPLEMENTAL SITE INVESTIGATION PLAN Barnes, Ferland and Associates, Inc. (BFA) has developed the following "Supplemental Site Investigation Plan" (Plan) to acquire more detailed information for determining the environmental impact associated with the landfill and for planning the scope of the remedial design program. The objectives of this Plan are to determine the: • Geological setting including definition of soil and rock types , permeable and confining layers, fractures and faults, hydraulic properties and potential contamination pathways; • Direction and rate of groundwater and surface water flows and seasonal water table variations; • Location and extent (both vertical and horizontal) of soil and groundwater contamination at discrete intervals; • Quality of surface water where it first appears from the ground water system in each of the major draws surrounding the site; and, • Quality of stream sediment in areas where sedimentation is most likely to occur. These objectives can be achieved through a phased data collection program involving additional field methods, upgrading the monitoring network and additional sampling and testing. In developing this Plan, we have reviewed existing files containing background information and previous recommendations made by others involved in this project. Pertinent information has been incorporated into this Plan. The data collection program is recommended as follows : Phase 1 Data Collection: Phase l data collection is needed to comply with the regulatory requirements and to obtain current data for planning Phase 2 activities. Phase l generally involves sampling and analyses of surface water and sediment from existing stations and several additional locations (Figure I). All sampling and testing procedures should be conducted in accordance with the existing Sampling Plan (attached). The following sampling and analyses are recommended : I. Repeat the first round (Jul y, 1994) for all existing locations and corresponding matrices (see Table 1) excluding soil samples collected on the landfill cap and monitor wells. 2. Two (2) surface soil samples taken in the northern settling basin. 3. Six (6) sediment samples along Richneck Creek and the unnamed tributary in depositional prone areas and as close to the landfill as possible. 95-017.00 ncssip.doc -1- 6/13/96 .. 4. Four ( 4) surface water samples, one from each of the major draws and as close to the landfill as possible. The sample should be collected from the first occurrence of water. I'hase 2 Data Collection: Phase 2 work primarily involves collecting additional information to further understand the site hydrogeology and possible plume movement. This will involve the use of surface geophysical methods, a drilling and sampling program, monitor well installations and additional soil and water laboratory analyses as described below: Surface Geophysical Program -It is recommended that a combination of electomagnetic and seismic surveys be used in the vicinity of the landfill (Figure 2). These techniques may be useful for further defining: • Geologic characterization (top of rock, fractures and faults, lithologic correlation, and clay confining layer mapping); • Hydrogeologic characterization (water table mapping, aquifer thickness, confining layer continuity); • Plume delineation (soil/groundwater contamination); • Anamolous areas in the landfill; and, • Possible locations and depths of additional borings and wells. Drilling and Sampling Programing -The environmental drilling and sampling program should include collection and testing the in-situ soil and ground water and installing monitor wells to better define the ground water flow direction. These data will be used to detect if leaks have occurred from the landfill as well as planning locations and depths of permanent monitor wells. At this time it is assumed that at least one monitoring cluster will be located at each draw, as also reflected in Figure 1. Environmental technologies such as Push Probe and Hydropunch are recommended to obtain vertical distribution of soil and ground water quality. All samples should be handled in accordance with the attached Sampling Plan. It is anticipated that ten (I 0) borings will be performed directly adjacent to the landfill as shown in Figure 2. At least one of the borings will be used as a lithology test boring complete with continuous sampling to competent rock. Three soil and two ground water samples will be collected from each boring using in-situ technology. The soil samples (Figure 3) will be collected from below the base of the landfill and above the water table in the silty clay strata (about 30 feet deep), within the sandy silt strata (about 50 feet deep) and within the saprolite zone (about 60-90 feet deep). Ground water samples will be collected using hydropunch technology at the water table and in the saprolite zone of each boring. 93-017.00 ncssip.doc -2- 6/13/96 It is recommended that both samples be analyzed. However, only one soil sample from each test boring will be tested. Currently only four monitor wells exist at this site. Figure 4 shows that the water level in MW-2 is consistently lower than the other wells and that the highest water level varies seasonally in MW- 1, 3 and 4. However, review of the data provided indicates the MW-I has failed to respond to changes in water levels since approximately December, 1994 and prior to that consistently lagged the other wells. This may be the result of a plugged well screen, but underscores the importance of having a proper well design in order to collect representative environmental data. Since the landfill lies on a ridge crest, ground water is expected to flow radially outward from the site. In at least four of the new locations drilled (Figure 3) adjacent to the landfill, wells should be installed to better define the direction of ground water flow. These four wells should be surveyed and static water levels measured in addition to existing well measurements. This information will be used to better define the water table contours, flow direction and gradient at the site. These new wells should be screened across the first most productive zone below the water table to standards described in the following section. Monitor Well Installations Monitor wells will be designed and located based on site geology resu_Jts of the Phase I tests, surface geophysical survey, environmental drilling program and ground water flow direction. It is recommended that six monitor well clusters be constructed to detect the migration of contaminants based on the potential for enhanced migration. In addition to that basic network which is outlined in Figures I and 2, if contamination is detected in Phase I. Supplemental locations may be prudent. Each of the proposed six well clusters would include two wells installed adjacent to one another and screened at different intervals. Within each cluster one well should be screened at the water table but to capture the seasonally low water elevation and the other should be screened within the saprolite zone immediately above the bedrock surface. All new permanent monitor wells should then be sampled and tested in accordance with the attached Sampling Plan. Well Construction Guidelines All field work shall be conducted in conformance with accepted engineering and geologic practices as well as the Groundwater Section 's Guidelines for the Investigation and Remediation of Soils and Groundwater and the Hazardous Waste Section's Sample Collection Guidance Document. Well installation shall be in conformance with the North Carolina Well Construction Standards. A site safety plan shall be developed and followed by all field personnel. All appropriate decontamination procedures documented in the references above shall be followed . During the installation of each boring/well, a qualified hydrogeologist shall be present and a boring log completed for each well. Split spoon samples shall be collected at each change in lithology and where there has been a significant change in the penetration/drilling resistance. Soil 95-017.00 ncssip.doc -3- 6/13/96 • Groundwater Surface Water Landfill Contents (Wet and Dry) Landfill Leachate Surface Soil Carbon & Sand Filter Sedimentation Basin Air Notes: (I) Inorganics include: 95-017 TABLE 1 SUMMARY OF ANALYTE TESTING PCB Volatile Organics Semi-Volatile Organics Pesticides/Herbicides lnorganics <1> Dioxin Isomers Furan Isomers PCB Volatile Organics Semi-Volatile Organics Pesticides/Herbicides PCB's Dioxins Mono-Octa PCB Dioxin Volatile Organics Semi-Volatile Pesticides/Herbicides lnor anics 0 > PCB PCB PCB PCB EPA-8290 EPA-8240 EPA-8270 EPA-8081/814 l Various Methods EPA-8280 EPA-8290 EPA-8290 EPA-8240 EPA-8270 EPA-8081/814 l . EPA-8081 EPA-8290/1311 EPA-8081 EPA-8290 EPA-8240 EPA-8270 EPA-8081/8141 Various Methods EPA-8081 EPA-8081 EPA-8081 EPA- ppm ppb ppb ppb ppm ppt t m ppb ppb ppb ppb t ppb ppt ppb ppb ppb Ill Ill Arsenic, Barium, Cadmium, Chromium, Lead , Mercury, Selenium, Silver 6/13/96 cuttings shall be containerized until the analyses of ground water samples have been received from the laboratory. At such time, the appropriate disposal option shall be selected. Each well shall be constructed: a) in accordance with the attached diagram; b) in conformance with the State's well construction standards; and c) to be capable of yielding a ground water sample representative of the ground water quality at that location. The well casing and screen shall be constructed of 2 inch diameter PVC. The manufactured well screen shall be sized appropriately, according to the soil type . Each well shall be completed with a 10 foot well screen. The annular space from the bottom of the borehole to a distance of 2 feet above the top of the well screen shall be filled with an appropriately sized sand pack.· A two foot bentonite seal shall be placed on top of the sand pack. Above the bentonite seal the annular space will be filled with a bentonite-cement grout. Each well shall be completed with a protective steel outer casing and a locking cap. A sloping pad shall be constructed around the base of the well in order to direct water away from the well. Upon completion of the weir, a water level measuring point shall be established and the elevation determined to the nearest 0.01 foot. · Each monitoring well shall be developed afier the seal and grout have stabilized and no sooner than 24 hours after completion of the well. The well shall be developed until all suspended materials are removed or a reasonable volume of water has been removed. All well development and purge water shall be containerized until the analyses of ground water samples has been received from the laboratory. At such time, the appropriate disposal option shall be selected . After all wells are completed, hydraulic conductivity value(s) will be developed for the aquifer. A minimum of six slug tests or one pumping test shall be performed in order to develop the hydraulic conductivity value(s) at selected permeable zones. The specific wells to be used in the aquifer testing shall be selected afier an evaluation of the soil sample descriptions has been completed. S~mmary Report At the conclusion of the field work a data summary report will be prepared. The report shall concisely summarize methodologies employed and results of activities including Phase I sampling and testing, surface geophysical surveys, environmental drilling program, permanent monitor well placement and construction, hydraulic testing and analysis, and soil and water quality. Essential text, graphs, tables and figures will be included in the report. 95-017.00 ncssip.doc -4- 6/13/96 Ll!JUlJwlr ll @ MW-5 IIJ3W ~ Environmental Consuliants --=------=-----@IJ ITOfJ~~. ~@rr0110fJr1l aJOfJ(f} &,~~@@6aif@i:i, Om:. NORTH \ / < ' I ( I I I I ) I /~PPR / LOCATIO LEGEND XIMATE OF TRAIL \ \ \ • EXISTING WELL (MW) 6,. TEST BORINGS, HYDRO --• PUNCH SAMPLES & POSSIBLE WELL LOCATION @ NEW WELL CLUSTER (MW) SCALE 0 200' 400' 06-12-1996 1•15 PH WARREN COUNTY PCB LANDFILL EXISTING & PROPOSED MONITORING SITES FIGURE 2 @mm~v ~£,Environmental Consultants lli11rnse, P:sr/11rull 11mll iilee~cl11Q,se, One. """ PHASE I @ fi:rA&7R;AT6~C~~~~~) • SEDIMENT SAMPLE (SS) ffi EXISTING SURFACE WATER 1:J7 ·STATIONS PHASE II • EXISTING WELL (MW) 6, TEST BORINGS. HYDRO PUNCH SAMPLES & POSSIBLE WELL LOCATION NEW WELL CLUSTER (MW) @ 06-13-1996 \1:03 '1M WARREN COUNTY PCS LANOFlU. EXISTlNG a: PROPOSED MON1TORINO SITTS PHASE I >ND PHASE n FIGURE 1 ELEVATIONS (FT) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 8 8 8 8 8 8 8 8 8 8 11/24,92 1212:3192 1/26/ro 2/2.6/ro :Y.26/ro 4123,93 5/2093 6f25/93 7123/ro 8r:n93 9/27F.!3 ~ I 10/2.2F.!3 @I) . ' .. , "ii :;:i 11/18F.!3 (i!l T !v 12/17F.!3 ~ ~ s:: 1/25/94 "ii ! = @I) 2/2.494 :;:i (§). m ::, 312594 @I) < ~ .., s:: 4128/94 (§). 0 :E ::, ' ~ 3 tv 5118/94 ti) Ci) ::, ti) -6i27/94 @) ~ ~ 0 s:: 7/28/94 """ @) 0 :E "" l, '1,) ::, 8/26,94 !v Cl'I t i:::: ~ 9/26/94 ✓ .,. ' = :;:i ::, s:: ~ ;;:; 10/2.494 ., :E .b. 11/16/94 ,, 12/19/94 1/2SB5 G) ::0 2f2'3lg5 0 C 3/29/f15 z 0 "U ~ 0 5/2495 m ~ ~ 7/21 Ir15 8/28/f15 ~ 0 ::!J 9/2Sir15 F ::::1 10/2.495 0 0 11,'2Gg5 z (1, I (/) w 12f2.0B5 I \{) 1/26/FRJ \{) (1, ::!J 2/Z3,96 . ,. f\J ---, ~ c;) C, C f\J ::0 " ITI 3: r~ ·i r □ -1 LllJ uu /I\ w NORTH A r-,::i lI 1 ,J ll DRA'J 290' TS 292' TD-47 NOTES, \.lo ter Level MeosureMents on October 5, 1995 <Doshed Areos ore Jnfered) Bosed on Doto Received FroM Stote Files 30' 100' 4' LANDFILL " (70'-90') V AnttclpQted Approx. Location of Groundwater Divide ----250' 240' ~,&Environmental Consultants ~6/rrn.st:i, ll'.sv/11wt0 111/11//J tilt:it:i,r;c461U16t:i, Ona. 0 0 .s.cfil HORIZONTAL ORAi.' 2B0' 200' VERTICAL 25' SOUTH A' 400' 50' 06-12-1996 07•29 AM Generalized North -South Cross Section of the WARREN COUNTY PCB LANDFILL FIGURE 3