1986-04-04 – DOE – Historical Documentation of St Louis Airport Site Material

1986-04-04 - DOE - Historical Documentation of St Louis Airport Site Material

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‘ .>v~-:tt~ Tll l>oE ‘l/Y/’<~ m.o. 1 History of Material Storage at the St. Louis Airport ~torage Site Tnis is a sumnary of tne licensed mdterial that ha' s been stored at the ~t. Louis Airμort Storage Site (SLAPSS). The site is also referred to as the Robertson Airport Site ano as the St. Louis-Lambert Airport Property. The ~1.7 dcre tract is locatea immediately north of the airport, and since l94ti has been used solely for storaye. 1~1ost of tne mater1als stored at tl1e site were resioues genera~ed by tl1e Mall inckroat Cnemical Works during uranium prossessing operations for tne Atomic Energy Co1unission from 1946 to 1953. The t"1anhattan Engineer District (MtO) was grantee consent to use ana occupy the property on Maren 2, 1946; title was acquired by conae1nnat ion proceedings on January 3, 194 7. Table l sumruar i zes the mater i a.1 stored .H. the SLAP$S. Most mat er i a 1 was removed from tne site in tne 1%6 to 1%9 time ftarne, alt11ough some contaminatea wastes were buriea on site. The pitcholende raffinate, AM-7, was a proauct of operations at the 1~1alli11c1y 1~59 as
a result ot operations by MallinciLAt>SS consisr.s of bJried scrap and
wastes. Jecontami nation wastes, n .. t>b I e. and scrap from remov a 1 of bu i: 1j in gs
at Ues tren,rn Street between 195 7 and · %2 are buried at the ·;o1es t end of the
si:e. In aodi~ion, all structures at the SLAPSS ri€re razed in 1969 anu
Duried on site.
Table 1. Materials Stored at
St. Louis Airport Storage Site
Desi gnation
Material fnt ry Inventory Reports
Apri I ‘959 { 1 ) June 1960 (2)
Au9ust 1964 {2)
Uranium Uranium
Tonnage Tonnage Tonnage Tonnage
Pitchblende raff inate
Radium bearing residue
Barium sulpnate cake, unleached
Barium sulphate cake. leached
Colora~o raff lnate
’46 – ’55 (4)
• 46 – • 48 (4)
’46 – ’55 (4)
’46 – ’55 (4)
’46 – ·ss (4)
Vitro residues ’54 from Middlesex
Captured Japanese U,
C-Liner slag
precipitates’54 from Middlesex
Interim residue plant tailings
55,000 30- and 50- gallon drums
steel and alloy scrap
waste, rubble, and scrap
structures on site
’46 – ’53 l5)
begin ’55 (4)
by • 59 ( 4)
by ’59 {4)
bl.Ii l t ’46 – ’59
(1) Reference: Airport Storage Inventory — April 11, 1959.
(2) Reference, Invitations for bids, U.S. Atomic Energy Commission,
St. Louis Area Office, June 10, 1960, and August 3, 1964.
(3) Reference~ U.S. Atomic Energy Comm\ss\on survey, November 1965.
(4) from Oestrehan Street Refinery
(5) from Metal Plant at Plant 4 and Metal Plant 6E at Oestrehan Street
(6) from removal of buildings at Oestrehan Street between 1957 and 1962
(7) to Lake Ontario, New York. storage site
(8) to Cont1nental in 1966, transferred to Latty Avenue, Missouri, and
disposed of at west Lake Landf; 11 by the Cotter Corporation in 1973
(9) portion sent to Fernald In early 19GO’s; remainder to Continental in 1966
(10) buried at west end from 1957 through 1962
(11) razed and buried on site in 1969
——- ——-
74000 113
0 0
1500 22
8700 7
32500 48
350 2
{inc I. in above)
0 0
(inc 1.
1965 (3)
T__o nnage .._ ____
in abovtt)
’66 to Continental
’48 – , 49 ( 7)
’66 to Continental
’66 to Continental
“66 to Continental
’66 to Continental
to Fernald ’59
sold oy ’62
solo by ’62
( 10)
( , 1 )
.. … –
F:o..,, r:IJ’ ::I-?)
CHAPTER 2 ~l/”1′ ti”” ._A_s-re_
SITE DESCRIPTION c_/a’!1~t’f,’CA-r”i-~
4FJ:tM~1)t. ~
The purpose of this chapter is to describe the Latty Avenue
site at Hazelwood, Missouri, the characteristics of the contaminated
soils and structures present on the site, and the local
geology, hydrology and meteorology.
The site is located in north St. Louis County within the
corporate limits of the city of Hazelwood, Missouri. It is on
the south side, and at the western end of Latty Avenue, with a
·street address of 9200. The site is 2 mi {in a straight line)
north and slightly east of the control tower of the Lambertst.
Louis International Airport. The site is part of Lots 11
and 12 of Hazelwood Farm, a subdivision in U.S. Surveys 1 and 2,
Township 4·7 North, Range 6 East, St. Louis County, Missouri.
(See Figure 2-1.)
The total site, comprising approximately 11 acres, is in low
rolling hill terrain at approximately 520 ft above sea level.
It is in the drainage basin of Coldwater Creek, which discharges
some 12 mi downstream into the Missouri River. The variation in
elevation on the gently rolling site is approximately 10 ft. The
site is separated from Coldwater Creek by Right-of-Way lands of
the Norfolk and Western Railroad Company. Figure 2-2 is a descriptive
map of the site vicinity and includes topography of the site.
The site presently is under two ownerships. The westerly
3.498 acres are owned by Mr. Dean Jarboe of St. Louis; he purchased
the property in June 1977 from the Bayliss Company, which
in July of 1976 purchased it from Associate Commercial Corporation,
formerly Commercial Discount Corporation. The remainder
of the site {approximately 7.5 acres) is owned by the Norfolk and
Western Railroad. (See Figure 2-3.)
In early 1966, ore residues and uranium- and raditllll-bearing
processed wastes which had been stored at the St. Louis Airport
fill site, shown in Figure 2-1, were moved by the Continental
(l)See end of chapter for references.
.. “\.’• ..
Mining and Milling Company of Chicago, Illinois to the Latty Avenue
site. These wastes had been generated by Mallinckrodt Chemical
Works of St. Louis during the period 1942 through the late
1950’s. The Commercial Discount Corporation of Chicago, Illinois
purchased the residues in January 1967: much of the material then
was dried and shipped to the Cotter Corporation facilities in
Canon City, Colorado. The source material remaining at the Latty
Avenue site was sold to the Cotter Corporation in December.1969.
Records indicate that residues remaining on the site at that time
included 74,000 tons of Belgian Congo pitchblende raffinate containing
about 113 tons of uranium, 32,500 tons of Colorado raffinate
containing about 48 tons of uraniwn, and 8,700 tons of
leached barium sulfate containing about 7 tons of uranium. During
the period August through November 1970, Cotter Corporation dried
some of the remaining residues at the site and shipped them to
its mill in Canon City, Colorado. By December 1970, an estimated
10,000 tons of Colorado raffinate and 8,700 tons of leached barium
sulfate remained at the Latty Avenue site.
In April 1974, an NRC inspector was informed that the remaining
Colorado raffinate had been shipped in mid-1973 to Canon City
without drying and that the leached barium sulfate had been transported
to a landfill area in St. Louis County. A reported 12
to 18 in. of topsoil had been removed with the leached barium
sulfate. However, analyses of soil samples taken during an NRC
investigati~n of the Latty Avenue site in 1976 indicated the
presence of uranium- and thorium-bearing residues; furthermore,
at some points on the site, direct readings of radiation exceeded
criteria established by the NRC for decontamination of land areas
prior to release for unrestricted use.
On May 30 and June l, 1976 articles appeared in the St. Louis
Post-Dispatch which indicated that there were some discrepancies
in the official records as to how much contaminated material from
the Latty Avenue site had been deposited where. By letter of
June 2, 1976 the Director, Division of Enviromnental Quality,
Missouri Department of Natural Resources, inquired of the NRC
about this matter. During the June 22-24 and August 11, 1976
periods, Region III of the NRC investigated the alleged discrepancies
and reached the following conclusionsC2l:
ft.0.9.QO#Jt 1.W .. tM _ –
(a) About 8,700 tons of leached barium sulfate and
almost 39,000 tons of soil were removed from the
former licensee’s Latty Avenue site and buried
under 3 ft of other soil at the West Lake Landfill
in St. Louis County during the period July-October
{b) The material present at the West Lake Landfill
does not present an immediate radiological health
hazard to the public.
(c) It is estimated that the concentration of natural
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Table l . Uraniwn residues store airport (],> l\1J1… “‘~1” ht
site (November 1965) ~ -J
~~~~~~~~~~~~~~~—“ep”–3v~e ~O
Waste material
Pi tchhlende raffinate > AM,7
Colorado raffinate) /tM—10
11 :>
if l>OO /13
}’21 {oe; 4~
.,.a.~ r\1′”‘f £Barium sulfate cake, unleached
ft’ I i,t)C “”ur
Barium sulfate cake, leached
1,500 22
8, 700 7
(I £Ou t’L
i, t(}(J 7
‘· ~
– –
~1isc<:llaneous :naterial 350 ., - C-Ljncr slag 4,000 .< (1 ""-' Total 121,050 241 :t.V\i'tl~"'"' ~es~Jk 1'f~-t ~: !\'"':>~,
v;~,4 ~e$~~,_~
CAf’t~ “;Jc~~ ~ -,:>(l>c.-; rt’-t’\-t~s
Structures and other facilities On site (Nove:rr.be!’ 1965)
Reinforced concrete pit 200 x 42 x 12 ft
Storage shed (concrete flcor) transite roof)
Railroad spur
Loading platform (concrete)
Truck wash pad (concrete)
Thr~e single-story storage shacks (wood)
Chain-1 ink fence
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.,,.,.-~-···~—-~— 90!~•06 … __J _ UNITED STATES GOVE.R NME.N. T
Files DATE: September 25, 1962
R~&-J.-t. ~4>-1/Ul Ronert L. LayfiE91 , Source & Special Nuclear
Materials Branch, Division of Licensing & Regulation
The Contemporary Metals Corporation was awarded a contract by
the AEC fer the removal of uranium-bearin~ residues from stockpile
areas at Rcbertson, Missouri. These residues were generated
by the Comu.ission at its Destrehan Street Plant, St, Loui~.
~issouri. The applicant intends to process tf.ese ~esiile site. In additic:-i to r:.c: .. r::C:s c.f resi..::.;es,
the ?olo!’ad? raffi:-iate ~ unleacl.’ed bari’..:n s~lfc.. e ~~h. ar.d
learlum cake resulting from refinery c~·er~1:1or:s. 2:-:G rn1scellanecus
redc·..ies st~re~ in dr’.,1.-:is. These resic· .. 1es ~·.ave: l:·eer. cx~,c~~<'. the elemer:ts fer several years. The \.later ccr:tei"'.: is esti:r.ate::'. about 15 - 35%. --- ?rocessin p. °? la:"'lt--- };:::zeJwo.a.d • .J:~i ssourJ. _ -·- ---·---- Tr1e ar;ilicant h.S (‘lf lE:::’. situ~. U·~
h s~uth St. Louis. This is an indt:strial zone. i.”n,;:r;; is ~ l2r;-·~
C:.5,0CJ(; squc.re feet) steel and concrete factory r:~1ilC.:’..:;;- ~;.::stil’f
aT this site. Th& applicants propose to adept ~his t0ildinf for
t’.ieir specific needs. 7:-,e final facility 1-;i.1..l ~un~:~st cf<'! r.>:.ir:
pr:::c.r:!”-c:in;::>, are?.• c:·,e::-5 ::.try laboratcry • cha’.’:,-·::: re·,’.”.:”.’. ~;;:! office: .-,~·f:;:;::.
/ ..
The. ComJDission maintains a 21.74 acre residue storage site adjacent
to the St. Louis, Missouri, municipal airport. The site lies
approximately 15 miles northwest of downtown St. Louis. It is
bounded by Brown Road to the North and East, the Wabash Railroad
main line on the South, and Coldwater Creek on the Yest (which is
also the property line of McDonnell Aircra~ Corporation). South
of the Wabash Railroad right-of-way lies Lambert-St. Louis Municipal
Airport and an area occupied by the McDonnell Aircraft Corporation.
Aircraft take-off and landing patterns cross the property. A location
map is attached as Exhibit 1. An aerial photograph, .Exhibjt 2.
locates the site with respect to adjoining property.
The site is completely fenced; there is a roadway access gate on the
North-side and a railroad gate on the South side, allowing ffabash
iailroad service to the pl.ant via a spur line off the main line
track. The complete area, with its mounds of raffinate residues,
stacks of drums, hodge-podge of. scrap alld temporary type structures,
has the appearance of a. typical spoil area common to chemical
indu~tries having residue storage ptoblems.
Consent to use and occupy the tract was obtained by the Manhattan
Engineer District on March 2, 1946. Title was acquired to the
property on January 3, 1947, by condemnation proceedings for
$20,000. The property was acquired for the purpose of storing
residues from the Destrehan Street Refinery and the Metals Plant.
The major capital improvements to the site were a concrete pit,
202 ft. x 42 ft. x 16 ft., constructed to store radium-bearing
residues (though it vas never used for this purpose), a covered
concrete pad 45 ft. x 250 ft. for the storage of drummed materials
and a railroad siding with loading tipple. A detailed description
of the structures on site is given a·s the last section of this
The site vas operated by the Manhattan Engineer District and the
Commission from 1946 until J1.11y 1953, when the operation was
turned over to Mallinckrodt Chemical Works. Guards vere maintained
at the site from 1946 to 1951.
The Destrehan Refinery started operations in 1946, utiliiing
pitchblende ores and continued on this. feed until early in 1955.
– 1 …
………….. ·11
! ·:
I . I
~. ……… -,–“‘·-·~·-·—-··—.-.- ..- ·–~·–…—-·~———~——-·—-·-·-·~ -~—— –~—-··· ….. i
The procurement contract for these ores with African ~tals
Corporation required the United States to store both the pitchblende
raffinate (AM-7), which contains metal values other than uranium,
such as nickel. cobalt, and copper, as vell as the radium-bearing
residues (K-65)t as African Metals retained ownership of all
material excepf .its uranium content. African Metals. subsequently
transferred ownership of the AM-7 raffinate to the Government.
A large concrete pit was constructed to store the radium-bearing
residue (K-65) but was not used for this purpose due to health
reasons. Instead, this residue was stored in druDlS at the site,.
from 1946 until early in 1948. It was then transferred to the Lake
Ontario Storage Area, Model City, Nev York, in 1948 and 1949. lhe
AK-7 was stored on the gro~d in the open where it remains today,
except for about 350 tons of pitchblende raffinate (AM-7) which were
processed in a small pilot plant facility at Destrehan Street to
recover ionium. This material was processed in 1955-1957 and
returned to the originf 1 raffinate storage at the site.
The raffinate (AM–10) produced from subsequent operations using nonpi1chblende
feeds was stored separately. A barium cake residue
(AJ-4) produced by the refinery is also stored at the site; this
residue resulted from the precipitation of digest liquor with barium
carbonate to reduce its sulphate content. Both of these materials
are stored on open ground.
The residues generated by the refinery aggregate to greater than
95% of the material present~ stored at the Airport Site.
The other major components of residues were generated as slag from
the reduction step of the metal operations at Destrehan Street.
Two types of this material have been generated. Initially the
reduction. bombs were lined with dolomite. The used dolomite liner
(C-liner) was shipped from Destrehan Street and stored at the Airport
Site in bulk on the ground. Shipments of the dolomite slag started
in March 1946 and continued until early in 1953 when the dolomite
liner was replaced by a recycle magnesium fluorine liner. Approximately
half of the C-liner has since been shipped to FllPC for
recovery of the uranium content.
In 1955 an Interim iesidue Plant was constructed at Destrehan Street
to scalp the uranium content from the magnesium fluoride slag produced
in the Metals Plant. tailings from this operation (C-701)
were stored in the concrete pit at the Airport Site, and since have
alt been shipped to FMPC for recovery or the contained uranium.
By 1960 there also had accumulated at the storage site approximately
50,000 empty drums and 3500 tons of contaminated steel and alloy
scrap. However, by 1962 the bulk oi these materials bad been disposed
of for the metal salvage values.
– 2 –
‘ .
.r • t .
……….. -………. –·- —.–…·- … — …………….. ·-·—·
Approximately 2400 drums remain in the area; these c~ain aisc•l·
laneous residues, Japanese uranium-containing send and contaminated
scrap materials.
Haterbl presently stored at the site is stamnari.zed belcnn
Gross Tons Approx.Tons U
Pitchblende Raffinate (AX-7)
Raffi.nate (A.K-10)
Barium Cake (AJ-4)
Other Miscellaneous Residues
· and Captured Japanese 1J
C-liner slag
The original ground purchased in 1946 was Vf!ry uneven· and contained
• low drainage area on the western section of the site. The land had
a drainage slope from East to West, with all surface drainage directed
to the Coldwater Creek at the western edge of the property. The
initial topography of the site is shown in the aerial photograph,
Exhibit 6.
It has been extremely difficult to ;econstruct precisely the sequence
and location of contaminated materials and residues deposited on site.
The Committee has collected from various files and from McDonnell
Aircraft Corporation a series of aerial photographs which depict the
transition at the original site to its present state. Various reports,
drawings and sketches were also located which contributed to a general
understanding of the degree of contamination of the site. Numerous
individuals associated with the Airport Storage Site have been contacted;
however, since such a time has lapsed since the active
operation of the site, much or the information obtained by these
verbal inquiries is qualified by uncertainties of memory. .Also, many
of the people who were intimately associated with the site during
its early operation are no longer available.
Judging from the knowledge gleaned from the above sources, it appears
that with respect to the western part of the site, early dispositions
of contaminated scrap metal were located in the lov areas then existing
on the western end of the property. The scrap metal and other
debris were later covered (in 1952} with dirt received (gratis) Crom
McDonnell Aircraf’t Corporation and worked with heavy equipment to
make a level storage area (see Ex.hibit 7). The reclaimed area is
nov occupied by AM-10 raffinate, drums of Japanese sand and contaminated
rubble and other waste from Destrehan Street •
• 3.
.f ,,~
:·{: L ~

. :· .’.
The existence or buried contaminated metal below the present surface
of the western section of the site was confirmed by tes,t drilling
described elsewhere in this report. Underground contaminated scrap
ia reported to be on the order of magnitude of 50 to 60 truckloads
plus one contaminated vehicle.
The eastern two-thirds of the site presently is covered with mounds
of C-li.ner slag, raffinate (AH-7)> and barium cake (AJ-4). These
mounds of residue rise to approximately 20 feet above normal ground
level. Drainage from the mounds and the adjoining areas is directed
to the Coldwater Creek •
.Drainage waters from the storage area have, in the past, produced
some minor contamination in Cold~ater Creek. Continued monitoring
of the complete area and the creek waters, however, has indicated
that significant levels have never been reached and that all radiation
readings are well within permissible and acceptable limits presently
prescribed by .AEC directives and manuals.
A topographic survey map of the site (Exhibit 3) shows the existing
limits of residue stockpiles, the general topography of the remaining
area on the basis of one root contour intervals and the location of
principal structures at the site. The aerial photograph, Rx:hibit 4,
shows the site essentially as it exists today.
The area is iDclosed by a chain link fence. It c.ontains the folloving
A reinforced concrete pit consisting of floor slab and walls,
200 ft. long x 42 .ft. wide by 12 f’t. deep.
A storage shed consisting of a 250 ft. x 45 rt. concrete floor
pad, with a center wall 7 ft. high and 1 ~- thick running the
length of the structure. The pad is covered with a corrugated
metal roof supported on wood columns and trusses. Sides and
ends of the shed are open.
A single track railroad spur which enters the south fence near
the east end of the site.
A steel and wood· tipple is located along the spur.
A timber drum loading platform, 18! ft. x 8 f’t. x a!- ft. high,
with stone fill ramp, is located just east of the tipple.
A reinforced concrete wash pad for trucks, measuring 51! ft. x 3Si rt. is located east of the Storage Shed.
1 l
• • ) • •
– —·-~-~—– …. d d -·-·—_……._ -~- — ·-· ·—~—. ·-· ·-· .. ··-·—·-··—‘—-, I \C

A reinforced concrete truck loading platfonn with tamp is
1.ocated north of the vash pad and adjacent to the vest end
of the Barium Sulfate residue. It is T-shaped, measuring 24 rt.
long x 65! ft. vide at the north side x la:l ft. vide at the
eouth si~e.
Three single-story wood buildings are also located. on the sites
A 32 ft. x l&i rt. office building at the main gate
on the north side of the area.
A 24j- ft. x 12 ft. guard house also at the main gate •.
A 9 rt. x 7 ft. portable guard house located near
the south fence, midway of the property.
– 5 –
. -..
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· .. . … .
. ·: .. . . ~.. .
.• . . . ;,j:·
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History of Material Storage at the
St. Louis Airport Storage Site
This is a sunrnary of the licensed material that has been stored at the
St. Louis Airport Storage Site (SLAPSS}. The site is also referred to as
the Robertson Airport Site and as the St. Louis-Lambert Airport Property.
The 21.7 acre tract is located immediately north of the airport, and since
1946 has oeen used solely for storage.
Most of the materials stored at the site were re$idues generated by the
Mallinckroat Chemical Works during uranium prossessing operations for the
Atomic Energy Conrnission from 1946 to 1953. The ~anhattan Engineering
District was granted consent to use and occupy the property on March 2,
1946; title was acq~ired by condemnation proceedings on January 3, 1947.
Table 1 summarizes the material stored at the SLAPSS. Most material was
removed from tne site in the 1966 to 1969 time frame, although some
contaminated wastes were buried on site.
The pitchblende raffinate, AM-7, was a proouct of operations at the
Mallinckrodt Oestrehan Street Refinery, which used pitchblende ores as a
< ·, feed for uranium production from 1946 until early in 1955. These ores were purchasea from African Metals Corporation, with the contract requiring the U.S. to store the raffinate while African Metals retained ownership of all mater1als other than uranium. The raffinate was storea in bulk on the grouna. About 350 tons of tHe ~-7 were processed in a pilor· plant at Oestrehan Street to recover ionium from 1955 to 1957, and returned to storage at SLAPSS. African Metals abandoned the material fol1owing aecreases in the market values of the nickel, cobalt, and copper remaining in the raffinate. The ~-7 was part of the residue from the site sold in l~ti6 to Continental Mining and Milling Company, and was moved to the Latty Avenue site from 1966 to 1967. ~ fo_, Radium bearing r~dues K-65, were also owned by African Metals and stored at the site~ Storage was originally planned to be in the concrete pit at the site, but due to health reasons was stored in drums. It was transferred to the Lake Ontario storage area in 1948 and 1949 • j ... ·.·· . Barium sulphate cake residue. AJ-4. was another product of the Destrehan .· Street Refinery. Storage was in bulk on the ground. _African Metals ~r e~I relinquished ownership of the barium cake. also referred to as airport .. ..,,... cake. It was part of the resiciue solo to Continental in 1966. The 8700 ..t- ~"''fl' tons of leached barium sulphate cake were believed to be dumped at the West ~~'wJ Lake Landfill by its owners. the Cotter Corporation, in 1973. However, c ,,.. t...,. .~( traces remained at the site, and were removed and disposed of at the Weldon _.. r1·"" Spring quarry in 1969 by the St. Louis-Lambert Airport Authority. .,.. .. _~-' Oi-t>~ \)
+ ~’ “”· .. , ..
The AM·lO raffinate was a re~idue resulting from the processing of C\. “,. ., ,v-‘i·,·~·
aomestic ores at Oestrehan Street. It was stored in bulk at SLAPSS~
separately from the AM-7. It was part of the residues sold to Continental
and removed in 1966-67.
‘-‘• “·”‘”””
Other residues which were presumably sold to Continental were the C-6
Vi!tro residues and V- lO capturea Japanese uranium-containing sands and
precipitates. These materials were stored in drums. They were transferred
to the SLAPSS from Middlesex in 1954 during th~~~loseout. w~
The C-Liner slag consisted mainly of dolomite liner with less than 2%
uranium content, and was stored in bulk on the ground. It resulted from the
sepdration of slag from the reduction step in the Metal Plant at Plant 4 and
later in Metal Plant 6E at Oestrehan Street. Shipments began March 10* 1946
and laste~ un~~~,!~jJY 1953 when the dolomite liner was replaced by a
re~~r~lnvento~y as of April 11, 1959 showed 7,800 tons of
C-Liner slay containing ~22.3 tons of uranium. A portion was sent to
Fernald for processing in the early 1960’s; inventory as of November 1965
was 4,000 tons containing 49 tons uranium. The remainder was transferred
to Continental in the 1966 sale.
The interim resiaue plant tailing~were from operations at the Destrehan
Street site, which conrnenced in 1955 to scalp the uranium content from the
magnesium fl~rioe slag. The tailings were shipped to Fernald and processed
in the late 19SO•s. with the process rate increasing to about 600 tons per
month in July 1959. ~ , ~ ~ /~d- fG.J ~A
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remainder were disposed, to
and alloy scrap. 1\ . .!~ 4 .. , ‘- •· · .J_ ·; ‘t-~;.t-,/~ ~~v . .:-. ,
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The only material remaining at the SLAPSS consists of buried scrap_. ~·
Oecontarnination wastes, rubble, and scrap from removal of buildings at
Oestrehan Street between 1957 and 1962 are buried· at the west end of the
site. In addition~ all structures at the SLAPSS were razed in 1969 and
buried on site •
. .
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