wilmington, delaware 19898

26
TO) J E. I. DU PONT DE NEMOURS & COMPANY INCORPORATED WILMINGTON, DELAWARE 19898 CHEV.CAi-SANDPIGMENTSDEPARTVENT May 21, 1986 Mr. Stephen R. Wassersug Director Hazardous Waste Management Division .Environmental Protection Division 841 Chestnut Building Philadelphia, PA 19107 Dear Mr. Wassersug: In response to your request of March 3, 1986, we are providing the following information and documents. First, let me report that the pigments operation at this site was sold to the Ciba-Geigy Corporation, effective April 13, 1984, and specific questions regarding their operation should be addressed to: Mr. J. L. Deming, Plant Manager Ciba-Geigy Corporation James and Water Streets Newport, DE 19804 Du Pont retains ownership of two inactive landfills and a magnetic 4tape operation, which has been renamed the Holly Run site. ^Ciba-Geigy also operates on the Du Pont property a drying lagoon for suspended solids and alum removed from their firewater reservoirs. •Attachment I provides copies of letters dated September 24, 1982, to the EPA and the State of Delaware, withdrawing the plant's Part A application and claiming only generator status under RCRA. This continues to apply to Du Pont's Holly Run operation and, to the best of our knowledge, still appplies to Ciba-Geigy's pigment operations. HR20079I

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Page 1: WILMINGTON, DELAWARE 19898

TO) J

E. I. DU PONT DE NEMOURS & COMPANYINCORPORATED

WILMINGTON, DELAWARE 19898

CHEV.CAi-SANDPIGMENTSDEPARTVENT

May 21, 1986

Mr. Stephen R. WassersugDirectorHazardous Waste Management Division.Environmental Protection Division841 Chestnut BuildingPhiladelphia, PA 19107

Dear Mr. Wassersug:

In response to your request of March 3, 1986, we areproviding the following information and documents.

First, let me report that the pigments operation at this sitewas sold to the Ciba-Geigy Corporation, effective April 13, 1984,and specific questions regarding their operation should be addressedto:

Mr. J. L. Deming, Plant ManagerCiba-Geigy CorporationJames and Water StreetsNewport, DE 19804

Du Pont retains ownership of two inactive landfills and a magnetic4tape operation, which has been renamed the Holly Run site.^Ciba-Geigy also operates on the Du Pont property a drying lagoon forsuspended solids and alum removed from their firewater reservoirs.

•Attachment I provides copies of letters dated September 24,1982, to the EPA and the State of Delaware, withdrawing the plant'sPart A application and claiming only generator status under RCRA.This continues to apply to Du Pont's Holly Run operation and, to thebest of our knowledge, still appplies to Ciba-Geigy's pigmentoperations.

HR20079I

Page 2: WILMINGTON, DELAWARE 19898

Mr. Stephen R. WassersugPage 2May 21, 1986

Attachments II, III, and IV are descriptions of the the solidwaste management units (SWMU): North Disposal Site, South DisposalSite, Drying Lagoon. Attachment V is previous correspondence withthe EPA that provides information on the quantity and nature ofwaste disposed in the North and South Disposal Sites. No closureplans are available for these as they were closed in 1974 and 1953,respectively. Generally, they were covered with soil and graded,but no other details are available. Details of the post-closuremonitoring program are available to you in the NUS CorporationReport on the Newport Landfill. Attachment VI is a copy of thetitle page of that report for reference. Other than informationavailable in the groundwater program which is included in the NUSreport, there are no details available on any releases to the site.Finally, Attachments VII, VIII, IX, X, and XI are maps showing thelocation of the SWMU. Note that VII, VIII, and IX are also includedin the NUS report, as is a photograph of the site.

If you have questions or need further information regardingthe Holly Run site, please contact Dr. A. B. Palmer (302-774-9350).

Sincerely,

R. J. MattsonProduction Manager

RJM:pahAttachments

cc: Mr. Anthony Bartholomew, ManagerWaste Management SectionDelaware Dept. of Natural Resourcesand Environmental ControlDover, DE 19903

bcc: J. L. DentingCiba-Geigy Corporation «oonn7QOJames and Water Streets AittUU/;3t.Newport, DE 19804

P. E. Kress, Chambers WorksP. Meitner, LegalG. G. Dougherty, P&EP, Holly Run

Page 3: WILMINGTON, DELAWARE 19898

ATTACHMENT I (1 of 2

CH.J5 RE* 128C

UTAIUSMID1102

E. I. DU PONT DE NEMOURS & COMPANY ' "'cv'INCORPORATED

NEWPORT, DELAWARE 19804

CHEMICALS AND PIGMENTS DEPARTMENT September 24, 1982

Ms. Shirley BulkinUnited States Environmental Protection AgencyRegion III6th and Walnut StreetsPhiladelphia, Pennsylvania 19106

Dear Ms. Bulkin:

RE: RCRA PERMIT APPLICATION

On November 19, 1980, we mailed you a RCRA Part A permit application(copy attached) for the Du Pont - Newport Plant, EPA I.D. No. DED 980 555122. At that time, we listed our plant as both a generator and a storerof hazardous waste because of the possibility that the ninety-dayaccumulation time might be exceeded.

In view of EPA's liberalization of the accumulation time rule andccuragemenlr-to withdraw protective filings (47 Fed. Reg. 1250-1251,

anuary 11, 1982), we have reexamined storage requirements and determinedthat we no longer need to be classified as a Storer under RCRA. Thus, theappropriate RCRA classification for our plant now is that of a Generatoronly. Therefore, we request that you amend your records accordingly towithdraw our Part A application. We also are notifying the State ofDelaware of this request by the attached letter.

In view of our status change to Generator, we also will not be filing aPart B RCRA permit application as requested in your letter of March 24,1982.

Please let me know if you have any questions.

Sincerely,

F. B. BREDIMUSPLANT MANAGER LCGiSTiCS^-i^'V^rAL ,V«T-

: cac REGULATORY AF'/vsa SECTIONttachments to addressee onlyice : r t) Oiisr ^ ? ? p v A g;2:0 0793

G. G. DoughertyM. BarSZCZ ... -<.••"- ...,-*t*.:n ,.:-_ = 'C

M __i'-STl.'ri _. _?-t£M| . ...-OCrTLL. n. _

W R .Ipnm'nat; ._. ar-ss». ". _ -M' — TI.C.V.%BA. D. Ut-IIIIIIiyS _....C.L--<Y _ISEY . __ wOLreH. G. Foley — *"= • '-' B«=tJ ——. .sc-i.i.n _ _ FCNTIN

Page 4: WILMINGTON, DELAWARE 19898

ATTACHMENT 1 (2 of 2

CC: Robu ; J. Touhey, ManagerState of DelawareDiv. of Environmental Control

tSTilUSNlO W02

E. I. DU PONT DE NEMOURS & COMPANY• INCORPORATED

NEWPORT, DELAWARE 19804

CHEMICALS AND PIGMENTS DEPARTMENTSeptember 24, 1982

George 3. BenderResources Control SpecialistState of DelawareDivision of Environmental ControlDNRECWater Resources SectionP.O. Box 1401Dover, Delaware 19901

Gentlemen:

RE; HAZARDOUS WASTE MANAGEMENT PROGRAM

On February 17, 1981, we mailed Mr. Touhey a "State of DelawareNotification of Hazardous Waste Activity" form (attached) and onAugust 14, 1981 supplied additional information regarding that"Notification" to Mr. Arai (attached).

Please be advised that the Du Pont - Newport Plant requests a change inRCRA classification from that of a Storer of hazardous waste to Generatoronly status, as discussed in the concurrent letter to U.S. EPA, Region III(attached). Will you please amend your records accordingly. It is myunderstanding that Mr. George H. Hull, Plant Environmental and EnergyCoordinator spoke with you on the telephone September 20, 1982, at whichtime Mr. Hull confirmed our conclusion that the Newport Plant will not nowbe required to submit a permit application under Delaware's Hazardous WasteManagement Program.

Please let me know if you have any questions.

Sincerely,

F. B. BREDIMUSPLANT MANAGER

FBBrcacAttachments to addressee onlyECO: cff:T; it"££WT;ir&

G. "G. DoughertyM. BarszczG. H. HullW. B. JenningsH., G. Foley

Page 5: WILMINGTON, DELAWARE 19898

ATTACHMENT II

NORTH DISPOSAL SITE

ACTIVE 1902 - 1974, APPROXIMATELY SEVEN ACRES

CONTENTS: Approximately 25 M tons of process wastes and generalrefuse to include:

• Pigment

• QA Tars

• Chromium Dioxide

• Thoriated Nickel

' • Dirt contaminated with Zinc and Barites Ore(Lithipone process)

ENVIRONMENTAL PROGRAM;

• Operation licensed with State.

• Thoriated Nickel disposal licensed with A.E.G.

• Closure filed with State.

• Monitoring well (9) sampling quarterly, reportedto State.

REGULATORY INTERFACE;

• Operation reported through Eckhardt questionnaire.

• EPA inspections 2/80 and 6/80.

• Operation reported to EPA/DNREC in response to inquiryconcerning former waste disposal operations.

BR200795

Page 6: WILMINGTON, DELAWARE 19898

ATTACHMENT III

*J > ••"• 1 I *'<iui,'«(Red)SOUTH DISPOSAL SITE

ACTIVE 1902 - 1953, APPROXIMATELY 15 ACRES

CONTENTS: Approximately 25 M tons of waste generated in themanufacture of Lithipone consisting of insolubleZinc and Barites Ore residues containing Bariumand trace metals.

ENVIRONMENTAL PROGRAM;

• Limited surface water and creek water sampling (1970)showed low metal concentrations. Core samples showedhigher metal concentrations but of an insoluble nature.

• Core samples in 1978 confirmed elevated levels of Zinc,Cadmium, Chromium, and Lead in the fill contents. •

• Soil borings obtained in 1980 indicated a soil structureof low permeability.

• Aquifer groundwater analyses in 1980 confirmedenvironmental "stability"; negligible metalconcentrations.

REGULATORY INTERFACE:

• Existence communicated to County prior to constructionof 72" sewer main through site (1976).

• Existence of deposit communicated to State Division ofHighways during negotiation of sale for roadway use (1979)

• Operation reported through Eckhardt questionnaire.• Operation reported to EPA/DNREC in response to inquiry

concerning former waste disposal operations.

AR20Q796

Page 7: WILMINGTON, DELAWARE 19898

ATTACHMENT IV

DRYING LAGOON

ACTIVE 1976 - PRESENT, LESS THAN 1/2 ACRE

CONTENTSi: Several tons of Christina River suspended solids andalum from plant reservoirs.

ENVIRONMENTAL PROGRAM:

Sampling of surface water of the lagoon indicates apH of 7.4 and leachate checked & approved by State.

REGULATORY INTERFACE:

Operated under State permit.

AR200797

Page 8: WILMINGTON, DELAWARE 19898

ATTACHMENT V (1 of -

f.'01'l-.lDtlO!

E. I. DU PONT DE NEMOURS & COMPANY CC: Robert Toughey - DN

NEWPORT, DELAWARE 19804 x/..., ,, .

CHEMICALS. DYES AND PIGMENTS DEPARTMENT

May 12, 1980

Mr. Wayne NaylorU. S. ERA Region III6th and Walnut StreetsP h i l adel phia ,, Penn. 19106

This letter is to confirm that Du Pont's Newport Plantw i l l i n g l y admitted representatives of the Environmental ProtectionAgency and Delaware Department of Natural Resources and EnvironmentalControl on February 21, 1980 to conduct an on-site inspection andcollect samples of groundwater monitoring wells DM-3, DM-5, andDM-6, and Christina River water samples upstream and downstream ofthe site.

In response to your request during that visit, the followingis an approximate breakdown of the wastes contained on the site. AsI indicated at that time, these are very much "ballpark" estimates.

75% - residues containing metals(bonded organically and inorganically)

15% - miscellaneous wastes

9% - organic wastes

less than 1% - radioactive residues > 50 picocuri es/gram

Please accept my apologies for the delayed response to yourearlier inquiry. Also, as indicated during your visit, we wouldappreciate seeing the results of your analyses of the samplescollected when they become available.

M. BARSZCZSAFETY, HEALTH & ENVIRONMENTAL SUPERVISOR

MB:cac

BCC: F. B. Bredimus/V. A. RomitoP. A. Hopkins - CD&P - Wilm. ftR200798P. F. Brown - CD&P - Wilm.C. B. Everett - Legal- Wilm.

Page 9: WILMINGTON, DELAWARE 19898

ABANDONED LANDFILL - NORTH BANK O.F THE CHRISTINA R

• Quantity - estimated 25M tons of process wastes.

• Operating time - 1902-1975.

• Contents

• Garbage - several tons

• Trash (glass, wood, paper, cardboard) >100 tons

• Steel drums)) several hundred tons.

• Lever Packs)

• Sand and dirt)

• Concrete ) several thousand tons

* Steel work )

• Asbestos - ?5 tons

• Light ballasts - PCB's/PBB's - <2 tons

• Rubber - gasket material, tires from garage - a few tons

* Nylon shutters - —2 tons

* Artificial marble - "Corian" - <4 tons

• Acrylates and latex emulsions - several hundred pounds

• QA tars - >1,000 tons

• Bad quality CPC pigment)) <100 tons

• Bad quality QA pigment )

• Bad quality "Afflair" pigment - estimated 10,000-15,000pounds

* Bad quality Cr02 coated "Mylar" recording tape .- 6 tons

• "Afflair" fines (30% mica) + (70% TiO2) - estimated 100,000pounds

• Bad quality Cr02 - floor sweepings and bags - <£2 tons

AR200799

Page 10: WILMINGTON, DELAWARE 19898

- 2 -

* Thoriated nickel - consisted of mostly nickel, sonc chromiumand molybdum, and 2-5% thorium. Possibly present in<20 tons of combined waste. --,.,

- - i• Dirt contaminated with zinc ore - mostly soil -

hundred tons

• Raw materials left in bag liners and drums and leaks fromdrums - several hundred tons:

,. .a few tons

•QA ))

*CPC [ODCB from leaking drums - possible])3 ^ t•"Afflair" • )

)'Magnetic Products )

* Laboratory waste including resins from QA, CPC, "Afflair",and Magnetic Products - a few tons (mostly in jars inlever packs)

* Scrap amounts of the following materials

(• Graphite (thick pieces-carbon 3 'X. 1-1/2 ' rock) +( shavings + powder((• Titanium - metal((• Sodium (burned or exploded)((• Baxstron(

to (* Tiper-sul (potassium titanete (PKT)at the most j. Fibe>. (TiO2)

((• Erifon((• Silica((• Silicon((• Zirconium((• Cclumbium( .. •(• Titanium bisteric - synethetic oil - antifreeze((• Tetra-isopropyltitanete - now made at Chambers( Works

AR200800

Page 11: WILMINGTON, DELAWARE 19898

INERAL DEPOSIT - SOUTH BANK OF CHRISTINA RIVER (Estimated 25M tons)

• Black mud consisting of BaS, BaS04, dirt, other insolubles, andwhatever may have come through process from Barites Ore.

• Red mud consisting of Ferric Hydroxide and whatever may havecome through process from various zinc ores.

• The mineral deposit was covered with swamp mud by the ArmyCorps of Engineers.

• The ratio of black mud slurry was three to four times as muchas the red mud slurry.

AR20080I

Page 12: WILMINGTON, DELAWARE 19898

^RYING LAGOON - WEST END OF PLANT (BEYOND A-300 BUILDING)

• Consists of Christina River suspended solids and alum thatcame from our three creek water treatment reservoirs. The pHof water in the lagoon recently checked at 7.4.

• Several tons of material buried here.

AR200802

Page 13: WILMINGTON, DELAWARE 19898

ATTACHMENT V (2 of 3

UNITED STATES ENVIRONMENTAL PROTECTION AGENCYlps,., REGION III'"", 6TH AND WALNUT STREETS.

PHILADELPHIA. PENNSYLVANIA 19,106

In Reply Refer To: (3EN33)!••••, ••» « «

JUN111980Carl Everett, EsquireE.I. Du Pont de Nemours

and CompanyLegal Department1007 Market Street.Wilmington, Delaware 19898

Re: Landfill on the Newport Pigment Plant Site

Dear Mr. Everett:

I am writing to confirm our telephone conversation of Thursday,June 5, 1980, during which you indicated that Du Font's NewportPigment Plant should be able to provide the Environmental Pro-tection Agency with any specific information which is availableabout the contents of the landfill on the Newport Pigment Plant site,as well as information about the construction of the landfill itself.

During our conversation you indicated that you believed that thelandfill was used during the period from 1902 to 1975, and that theproperty had been bought by Du Pont in 1929. (I would appreciate havingthis information confirmed by letter as well.) In addition, you sta-ted that you believed it would be impossible for plant personnelto determine exactly what went into the landfill, because you believedthat the material was deposited prior to the time when governmentalregulations required that such records be kept. Therefore, I recog-nize that it may be difficult for Newport Pigment Plant to providespecific data concerning some of the information which I am reques-ting, which is as follows:

What substances were disposed at the landfill on whatdates, (or general time periods; e.g. , 1929-1940, etc.)the source and amount of each substance, as wellas the location and form (e.g., drums, liquid) of thed isposal;

Was the waste treated in any way prior todisposal? ' .

AR200803

Page 14: WILMINGTON, DELAWARE 19898

What is known about the construction of thelandfill(i.e., is any portion of it lined; are thereconstruction plans which could be provided)?

How long was the landfill active?

Even if there is no precise data concerning the above questions, Iwould appreciate the most specific information which can be obtained.

For example, if plant personnel are not certain as to exactly whatwas deposited from 1970 to 1975, if an estimate could be provided interms of volume of waste disposed by type, that information would bepreferable to a breakdown in percentages without any volume specified.

As you requested, I am enclosing copies of the summaries of EPA'ssampling results from those samples taken from the Newport PigmentPlant site on February 21, 1980. I would also like to confirm my re-quest for copies of the analyses done by Du Pont on the "split samples"which were obtained by plant officials on February 21, 1980.

I appreciate your cooperation in this matter, and I hope that itwill be possible for you to provide this information within the nextcouple of weeks.

Sincerely,

Ruthanne GordonAttorney, Legal Branch (3EN33)

Enclosures

AR20Q8QI*

Page 15: WILMINGTON, DELAWARE 19898

ATTACHMENT V (3 of 2

E. I. DU PONT DE NEMOURS & COMPANY CC: F. B. Bredimus - Newport™°"ATED Mr. Robert Toughey - DNRECNEWPORT, DELAWARE 19804 c> B> Everett s J „. Legal

July 22, 1980

CHEMICALS. DYES AND PIGMENTS. DEFAKTM iZNT

Ms. Ruthanne GordonAttorney, Legal Branch (3EN33)U. S. EPA Region III6th and Walnut StreetsPhiladelphia, Pa. 19106

RE: NEWPORT WASTE DISPOSAL OPERATIONS

Dear Ms. Gordon:

The enclosed is in response to your request to Carl Everettconcerning former waste disposal operations at the Newport Plant.As Carl has indicated, much of this information is necessarilygeneral due to the limited availability of records and first-handinformation. As a result, many of the "specifics" provided,particularly quantities, should be viewed as approximations.

A. GENERAL

The site of the Newport Plant was originally owned by'Henrik J. Krebs and used for the manufacture of Lithipone(a white pigment) beginning in 1902. In 1929, Du Pont purchasedthe site, continued this manufacturing and subsequently addedother product lines. Landfilling on the property was a meansof waste disposal used from 1902 until late 1974. In December,1974 such on plant landfill activities were terminated. Thefollowing process descriptions will serve to characterize thetype and timing of waste disposed.1 . Lithipone

Lithipone (a white pigment) was manufactured at thesite from 1902 to 1953. In this process, zinc ore (ZnS)was slurried in 78% sulfuric acid, chlorinated and alkalineprecipitated to generate zinc sulfate. Barites^ ore (BaS04)was roasted in a kiln, slurried and leached in hot water togenerate barium sulfide. The zinc sulfate and barium sulfidewere then combined to form the Lithipone pigment.

&R2008G5

Page 16: WILMINGTON, DELAWARE 19898

1. Lithipone (continued)r- - -, .- ,

> rA byproduct of the zinc treatment was a "red mud" /,,,/consisting of ferric hydroxide and other insoluble 'J'c-cuconstituents of the zinc ore. A byproduct of the baritestreatment was a "black mud" consisting of the insolubleconstituents of the barites ore. These were generated ina 1 to 3 ratio, respectively. These byproducts wereprincipally disposed of by pumping them through a pipelineacross the Christina River onto the ground south of theriver (see map). Some dikes and berms were constructed tocontain this material. As best can be determined, approximately25 thousand tons were deposited over a fifteen acre area.The slurried material hardened to the consistency of sandstoneafter disposal .

Upon terminating this process in 1953, it is believedthat the remaining zinc and barites ores (quantities unknown)were disposed of at the north disposal site. Additionally,several thousand tons of fill dirt containing zinc and baritesore were placed at the north disposal site, from excavationsfor new facilities at locations which had formerly served asopen storage points for piles of these ores.

Colored Pigments

Copper Phthalocyanine , a stable and relatively inertblue or green organic pigment, has been manufactured at thesite since 1947. Generally, all byproducts of this processhave been and are discharged into municipal waste treatmentfacilities.

Quinacridone, a stable and relatively inert red organicpigment, has been manufactured at Newport since 1958. Byproductsof this process have been and are discharged into municipalwaste treatment facilities with the .exception of a nonwatersoluble, high-melting, tar-like solid which, until 1974, wasdisposed of at the north disposal site (approximately 1,000tons total). Since 1974, this material has been landfilledoff-site by a contractor.

"Afflair", mica coated with titanium dioxide (a stableand relatively inert inorganic white pigment^was manufacturedat Newport from 1964 to 1979. Some "scrap" mica was disposedof at the north disposal site (approximately fifte.en tons).

Approximately two hundred tons of off-quality pigment fromall three processes were drummed and disposed of at the northdisposal site. Additionally, small amounts of pigment wouldhave also been contained on or in discarded filter cloths, pressplates, pallets, etc. at this location.

AR200806

Page 17: WILMINGTON, DELAWARE 19898

- 3 -

3. Metals

From 1950 to approximately 1960, metals and metaT-T'icalloys were manufactured at the site including Titanium,Zirconium, and Silicon. unknown but relatively smallamounts of off-grade materials from these processes weredisposed of at the north disposal site.

Also, for two years of this period, Thoriated Nickel(Nickel containing 2-5 percent Th02, which is radioactivebut insoluble).was produced. Approximately twenty tonsof wastes from this process (predominantly Thoriated Nickel,but also containing some off-grade ThO;?) were segregatedand buried in compliance with the Atomic Energy Act.

4. Magnetic Products

Chromium Dioxide (a relatively stable and inert solid)has been manufactured since 1966. A portion of this productionis used on site to coat Mylar film for recording tape.Approximately ten tons of off-quality Chromium Dioxide (drummed)and coated Mylar recording tape (bagged) were believed disposedof at the north disposal site.

5. Other

Approximately six tons of off-quality Nylon shutters andCorian (solid sheets similar in appearance to marble) weredeposited in the north disposal site.

Approximately 13-15 thousand tons of garbage, trash,empty drums, concrete, steel, rubber refuse, and miscellaneousdrummed process wastes generated from 1902-1974 were depositedin the north disposal site.

Approximately five tons of insulating materials containingasbestos are also believed located in the north disposal site.This material was probably not specially contained but disposedof as general refuse.

Small amounts of laboratory wastes in glass containers werepackaged in leverpaks and deposited at the north disposal site.

B. CONSTRUCTION

1. South Disposal Site

As indicated earlier, this disposal site operated fromapproximately 1902-1953. It contains approximately 25 thousandtons of insoluble zinc and barites ore residues and covers anestimated 15 acres which was partly contained by dikes and berms,Following disposal, these residues hardened intoasgiweAlri'oq-t hi kesandstone. HKdUUUV/

Page 18: WILMINGTON, DELAWARE 19898

- 4 -

1. South Disposal Site (continued)

This disposal site was not lined, but soil boringstaken on the perimeter indicate it is on a varigated claysoil with some silt. The lower part of this soildemonstrated a vertical hydraulic conductivity in the orderof 1 x 10-7 cm/sec. In 1973, the State of Delaware,Department of Highways and Transportation deposited approxi-mately 130,000 cubic yards of soil at this location as aresult of highway construction adjacent to the property,covering this disposal area with several feet of soil.

Analyses of groundwater samples collected during soilborings have substantiated the "stability" of this formerdisposal site. Samples of the Potomac aquifer takensouth and southwest of the site have not indicated any metalconcentrations in excess of the Primary Drinking WaterStandards.

2. North Disposal Site

This site was used for the disposal of general refuseand process wastes (including off-quality product) beginningin the early 1900's and continuing until late 1974. Thisoperation ultimately covered approximately seven acres onthe southwestern portion of the developed property and isestimated to contain 25 thousand tons of material.

This disposal site was not lined, but is situated onnative clay soil of low permeability. The southern borderof this location was built up with the fill material alongthe Christina River -to a height of fifteen feet and latermaterials were disposed of to the north of this berm whichserved as an access road. The working depth of the fillarea ranged from fifteen feet at the southeastern edge toapproximately eight feet in the northwestern portion. Thissite was operated under a State of Delaware permit from 1968until its closure on January 1, 1975. Upon closure, thesite was "capped" with two foot of clay soil and graded tominimize rain water percolation. Since closure, a total ofnine monitor wells have been installed. Geological datafrom these nine wells and two additional production wells onplant property, have indicated the existence of a shallow(Pleistocene) and deep (Potomac) aquifer underlying the property.Well data indicate a predominantly southerly flow in both aquifersfrom the disposal site. Water quality data from the elevenwells, which .is routinely reported to the State Department ofNatural Resources and Environmental Control (DNREC), have notindicated any significant migration of pollutants to the deepaquifer, with the exception of DM-3. This well has consistentlyreflected elevated analytical results in rel ationa ftc2itlAfPA'Tf

Page 19: WILMINGTON, DELAWARE 19898

- 5 -

2. North Disposal Site (continued)

As expressed to the State in April, 1978 this is suspectedto be due to an improperly installed well which has alloweda localized migration of pollutants into the sampling zone.This is further supported by the location of this well, asit is believed to penetrate a portion of the former disposalsite. We feel it strongly advisable to seal this well tominimize its potential for groundwater contamination. Weare planning to obtain DNREC concurrence for discontinuingthis monitoring well and will be proposing the installationof an additional well or wells to assure effectivecharacterization of groundwater conditions.

This summarizes the available information concerning former wastedisposal operations at the Newport Plant. Please contact Carl Everettif you require further assistance.

M. BARSZCZSAFETY, HEALTH, AND ENVIRONMENTAL TOPERVISOR

MB:cac

Attachment

AR200809

Page 20: WILMINGTON, DELAWARE 19898

H 1 » n-W<J%W l 'Ydl'-JXillL'^ElJ'O

!'!- k ' '.."-r JL- .,• .

AR2008IO

Page 21: WILMINGTON, DELAWARE 19898

ATTACHMENT VI

-?:.

R-585-1-5-16AVAILABLE INFORMATION SITE INSPECTION OF

DUPONT NEWPORT LANDFILLPREPARED UNDER

TDD NO. F3-8410-12EPA NO. DE-20

CONTRACT NO. 68-01-6699

FOR THE

HAZARDOUS SITE CONTROL DIVISIONU.S. ENVIRONMENTAL PROTECTION AGENCY

JUNE 28, 1985

NUS CORPORATIONSUPERFUND DIVISION

SUBMITTED BY/ / // REVIEWED BY/H / APPROVED B

THOMAS PEAKCZ RLCHARD CROMER GARTH GLENENVIRON. TECHNICIAN /ASSISTANT MANAGER MANAGER, FIT III

AR2008II

Page 22: WILMINGTON, DELAWARE 19898

— ....! i: i l ,-t ' / •.

ATTACHMENT VII

Page 23: WILMINGTON, DELAWARE 19898

ATTACHMENT VIII

AR2008I3

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ATTACHMENT IX

p;• - . . ————T~

AR20081U

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ATTACHMENT X

Q_UJQ

CL

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<_}Q_

crOQ_

AR2008I5

Page 26: WILMINGTON, DELAWARE 19898

ATTACHMENT XI

——————-

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