United States        Office oi
Environmental Protection   Emergency and
Agency           Remedial Response
                               EPA/ROD/R03-91/130
                               September 1991
Superfund
Record of Decision:
McAdoo Associates, PA

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50272-101
REPORT DOCUMENTATION i. REPORT NO. 2.
PAGE EPA/ROD/R03-91/130
4. TWe and Subtitle
SUPERFUND RECORD OF DECISION
McAdoo Associates, PA
Third Remedial Action - Final
7. Authorfa)
9. Performing Organization Name and Addresa
12. Sponsoring Organization Name and Addreaa
U.S. Environmental Protection Agency
401 M Street, S.W.
Washington, D.C. 20460
3. Recipient a Acoaeaion No.
S. Report Date
09/30/91
6.
8. Performing Organization Rept No.
10. Pro|ecVTaak/Worii Unit No.
11. Contract(C) or GrantyG) No.
(C)
(G)
13. Type of Report & Period Covered
800/000
14.
 15. Supplementary Note*
 16. Abstract (Umil: 200 word«)
   The 9-acre McAdoo  Associates site  is  an  inactive strip and deep  mining facility
   located in Kline Township, Schuylkill County,  Pennsylvania.   The site consists of two
   locations: the  8-acre McAdoo-Kline Township (MKT)  location,  and  the 1-acre
   McAdoo-Blaine Street (MBS) location.   The MKT  location is situated at the site of an
   old (subsurface and surface strip) coal  mine,  and land adjacent  to this location is
   industrial, abandoned,  or contains reclaimed mine areas.  The shallow aquifer at the
   MKT location consists of ground water-filled mine workings and other subsurface voids
   beneath the MKT location, collectively called  the "mine pool".   The mine pool
   discharges at the  Silverbrook discharge  to the upper reaches of  the Little Schuylkill
   River.  Both the mine pool and the river have  been severely  affected by acid mine
 '  drainage.  The  MBS location is adjacent  to a residential area and a mine spoil
   reclamation site,  and is presently covered with gravel and used  for vehicle storage.
   From the  1880's to the 1960's, strip  and deep  mining of anthracite coal occurred at
   the MKT location.   Two rotary kiln furnaces and an upright liquid waste incinerator
   were installed  onsite between 1975 and 1976 to reclaim metals from waste sludges,
   reportedly using waste solvents as fuels.   In  1979,  EPA ordered  the MKT location to

   (See Attached Page)
 17. Document Analyai* a. Descriptor*
   Record of Decision - McAdoo Associates,  PA
   Third Remedial Action - Final
   Contaminated Media:   None
   Key Contaminants: None
   b. Identifiera/Open-Ended Terms
   c. COSATI Held/Group
18. Availability Statement
18. Security Oaaa (Thia Report)
None
20. Security Ctaaa (Thia Page)
None
21. No. ofPagea
55
22. Price
(See ANS1-Z38.18)
                                     See /nafructiofu on Reverse
OPTIONAL FORM 272 (4-77)
(Formerly NTIS-3S)
Department of Commerce

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EPA/ROD/R03-91/130
McAdoo Associates, PA
Third Remedial Action - Final

Abstract (Continued)

close because of numerous environmental compliance problems.  At the time of closure, the
location contained an incinerator, a garage and offsite trailer, 6,790 drums of hazardous
waste, four above-ground 15,000-gallon storage tanks, three above-ground 10,000-gallon
tanks, and miscellaneous debris.  The MBS location was used for the storage of waste oil
and hazardous waste in 5 underground tanks.  Activities at the MBS location were stopped
by EPA in 1979.  As a result of Federal investigations, all drums and site features were
removed from the MKT location between 1981 and 1988.  A 1984 Initial Remedial Measure
(IRM) for the MBS location provided for removal of underground tanks and contaminated
soil, and a 1985 ROD addressed remediation of soil contamination at the MKT location.
This ROD addresses sediment, ground water, and surface water at the MKT location, and
ground water at the MBS location.  EPA has determined that no further remedial action
other than that already implemented at the site is required to ensure protection of human
health and the environment; therefore, there are no contaminants of concern.

The selected remedial action for this site is no further action because previous interim
remedial activities were adequate to protect human health and the environment.

Ground water monitoring at the MKT and MBS locations will be performed,  including
expanding the ongoing water quality monitoring program at the MKT location,  and
installing four ground water monitoring wells at the MBS location.  The estimated present
worth cost for this no action remedy with ground water monitoring is $503,540, which
includes an annual O&M cost of $434,000 for 30 years.

PERFORMANCE STANDARDS OR GOALS:  Not applicable.

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                        RECORD OF DECISION
                      MCADOO ASSOCIATES SITE

                           DECLARATION

NAME AND LOCATION

McAdoo Associates Site: Kline Township and Blaine Street locations
McAdoo Borough, Kline Township, Schuylkill County, Pennsylvania
Operable Unit 2

STATEMENT OF BASIS AND PURPOSE

This decision document represents the selected remedial action for
the  McAdoo Associates  Site.  Ground water,  surface water,  and
sediments associated with the McAdoo-Kline Township (MKT) location,
and ground  water associated with  the McAdoo-Blaine Street (MBS)
location, (both hereinafter considered the site), are addressed in
this Record of Decision (ROD).  This ROD is in accordance with the
Comprehensive Environmental Response, Compensation, and Liability
Act   of  1980,  (CERCLA) 42  U.S.C.  SS 9601 efc.  sea. .  and,  to the
extent practicable,  the  National  Oil  and  Hazardous  Substances
Pollution Contingency  Plan (NCP).   It  should be  noted  that soil
conditions  at  both  the MBS  and  MKT locations were  previously
addressed  and  remediated  by RODs completed in  1984  and 1985,
respectively.

This decision  is based upon  the  contents  of the Administrative
Record File for the McAdoo Associates Site  (index attached).

The Commonwealth of Pennsylvania does not concur with the selected
remedy.

DESCRIPTION OF THE REMEDY

The EPA has determined that no further remedial action other than
that  already  implemented   at the site  is  required  to  ensure
protection of human health and the environment.  However, ground-
water monitoring at the MKT and MBS locations will be performed for
30  years  to ensure the  effectiveness  of the remedial  actions
already executed.

The major components of the monitoring program include:

•  Expansion of the  ongoing  long-term  (30 years)  water  quality
   monitoring program as needed  at the  MKT location (originally
   included  as part of the 1985 ROD) to include additional sampling
   of  all existing  monitoring wells.   Samples from  these wells
   shall  be  analyzed  for  volatile  organic  compounds  and  nine
   inorganic analytes.

•  Installation  of  four ground-water  monitoring wells  at the MBS
   location  and the long-term monitoring (30 years) of ground-water
   quality at the MBS location.  Samples  from  these wells shall be

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   analyzed for volatile and  semi-volatile  organic compounds and
   Total Analyte List inorganics.
DECLARATION STATEMENT

The EPA has determined that no further remedial action is necessary
for the  McAdoo Associates site.   The previous  response actions
implemented  (drum  and soil removal,  soil excavation and capping)
eliminate  the need  to  conduct  any  additional  remedial action.
Because this remedy will result in hazardous substances remaining
onsite,  a  review  will  be conducted  in accordance with Section
121(c) of CERCLA, 42 U.S.C. S 9621(c), within  five years after the
commencement of  the  monitoring.   The review will be conducted to
ensure  that   human health and  the  environment  continue to  be
adequately protected and to determine the effectiveness of remedies
already implemented at the McAdoo Associates Site.
Edwin B. Erickson                       Date
Regional Administrator
Region III

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                        RECORD OF DECISION
                    MCADOO ASSOCIATES SITE,  PA
                        TABLE OF CONTENTS
SITE NAME, LOCATION, AND DESCRIPTION                            1

SITE HISTORY AND ENFORCEMENT ACTIVITIES                         6

HIGHLIGHTS OF COMMUNITY PARTICIPATION                           7

SCOPE AND ROLE OF OPERABLE UNIT                                 8

SITE CHARACTERISTICS                                            8

   MCADOO-KLINE TOWNSHIP LOCATION                               9

     SURFACE WATER/SEDIMENT INVESTIGATION                       9
     ECOLOGICAL INVESTIGATION                                  14
     GROUND-WATER INVESTIGATION                                14

   MCADOO-BLAINE STREET LOCATION                               30

     BACKGROUND INFORMATION REVIEW                             30

SUMMARY OF SITE RISKS                                          35

   CONTAMINANTS OF  POTENTIAL CONCERN                           35
   EXPOSURE ASSESSMENT                                          36
   HUMAN  HEALTH RISK                                            36
   ECOLOGICAL RISK                                              41

SELECTED REMEDY                                                46

DOCUMENTATION OF SIGNIFICANT CHANGES                           47

ATTACHMENT - RESPONSIVENESS SUMMARY

           - ADMINISTRATIVE RECORD INDEX

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                         DECISION SUMMARY
                      MCADOO ASSOCIATES SITE
SITE NAME, LOCATION, AND DESCRIPTION

The McAdoo  Associates site addressed  in  this  Record of Decision
includes the McAdoo-Kline Township  (MKT)  location and the McAdoo-
Blaine Street  (MBS)  location  (see Figure  1).

The MKT location is  located in Kline Township, Schuylkill County,
in eastern Pennsylvania.  The MKT location lies approximately 1.5
miles  south  of McAdoo Borough due  east of U. S.  Route 309, and
immediately south of the ramp to the 1-81 interchange  (see Figure
2) .   The MKT  location  consists  of approximately  8  acres and is
situated at the site of an old (subsurface and  surface  strip) coal
mine.  Land use in the vicinity of the MKT location  is  industrial
(a cogeneration plant is located  nearby)  or abandoned or reclaimed
mine areas.  Residential  areas are located at a greater distance
north  (approximately 900 to 1900 feet) and south (over  1 mile) of
the MKT location (see Figure 3).

The shallow "aquifer" at the MKT  location consists  of ground water
filled mine  workings and other subsurface voids beneath the MKT
location,  collectively called the  "mine pool".   The  mine pool
discharges at the Silverbrook discharge to the upper reaches of the
Little Schuylkill River, the nearest surface water  body to the MKT
location  (Figure 3) .  The Little Schuylkill River and mine pool
have been severely affected by acid mine drainage from  the former
mining activities  in the  area, and there is little to  no aquatic
life in  the  upper  reaches of the river  as  a  consequence of this
mine drainage.

Residential  wells  in the  vicinity of  the MKT location  tap the
deeper  aquifer  located  within  the Pottsvilie  and Mauch  Chunk
Formations.  The Pottsville and Mauch  Chunk Formations  consist of
interbedded sandstones, siltstones and  shales.  There appears to be
no hydrologic connection between the mine pool  and  deeper aquifers
in the  area,  based  on  the results of the  1991  focused Remedial
Investigation/Feasibility Study  (RI/FS) and previous studies.
The approximately 1-acre MBS location is located in the Borough of
McAdoo, also in Kline Township, Schuylkill County,  approximately  3
miles from the MKT location (see Figure 4).   The MBS  location is
situated near  a  residential area (McAdoo Borough)  and  mine spoil
reclamation  site.    The  MBS  location  is presently  covered with
gravel and used for vehicle storage.  Residential population  in the
immediate vicinity of the MBS location is approximately  2,500  (1990
census).

Water supply in this area is provided  by  surface water  reservoirs
and water supply wells operated by the Honey Brook Water Company.
These  sources  are located  over  1000  feet southwest  of  the MBS

                                1

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                      BLAINE STREET
                        LOCATION
               HONEYBROOK WATER CO.
                  WELL LOCATION

SOURCE Hafl»ton. Coryglwn. T*n«qua tnti D*ww Quadrangle
                                        FIGURE  1
                                        GENERAL LOCATION MAP
                                        MCADOO-KLINE  TOWNSHIP AND
                                        BLAINE  STREET LOCATIONS
                                        MCADOO,  PENNSYLY

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                      TO
                   HAZELTON
                   MCADOO
i
I
   TO
 TAMAQUA
ALLENTOWN
                                                   MINE
                                                       SPOILS
                          300'
                                  FIGURE 2
                                  SITE MAP
                                  MCADOO-KLINE TOWNSHIP LOCATION
                                  MCADOO, PENNSYLVANIA

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LOFTY CREEK —
           UTTLE SCHUYLKIU.
                   RIVER
                        750
                       FEET
1500
FIGURE 3
REGIONAL LOCATION MAP
MCADOO SITE
MCADOO,  PENNSYLVANIA

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   ! HOUSE I    'HOUSC:
   N. HARRISON ST.
10
u
   House I
     HOUSC! OARAGE
       ALLEY
           Mouse!
                             — MBS LOCATION
     N. LOGAN ST.
       ALLEY
         NOT TO SCALE
ABANDONED
 IHOUSeI
                         OLD MINE

                         PROPERTY
                                    OPEN FIELD
                             FIGURE  4
                             SITE MAP
                             MCADOO-BLAINE  STREET LOCATION
                             MCADOO,  PENNSYLVANIA

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 location.  The water supply wells are screened in the deep aquifer
 within the Mauch Chunk Formation underlying the region.

 The  nearest surface water  body to  the  MBS  location  is  a small
 unnamed drainage stream located approximately 400 feet northeast of
 the  location.  Drainage from the MBS  location  is to the northeast
 away from the water supply areas.


 SITE HISTORY AND ENFORCEMENT ACTIVITIES

 The  original use of the MKT location was  the strip and  deep mining
 of anthracite coal, which occurred sporadically from the 1880's to
 the  1960's.  The 1-1/2 acre tract comprising the western portion of
 the MKT location was acquired in January 1975 by McAdoo  Associates.
 Two  rotary kiln  furnaces  and  an upright liquid waste  incinerator
 were installed  on  the   property  between 1975  and  1976,  and
 reportedly  were  operated to  reclaim metals  from  waste sludges,
 reportedly using waste solvents  as fuels.    The MKT location was
 ordered  closed in  1979   as  a  result of  numerous  environmental
 compliance problems.  At  the time of closure in April of 1979, the
 MKT  location was inventoried and found to contain:  an incinerator,
 a garage  and an office trailer;  6,790 drums  of hazardous waste;
 four above ground  15,000-gallon  storage  tanks and  three above
 ground 10,000-gallon tanks; and miscellaneous  pallets, bricks and
 debris.

 The  MBS  location  was used  for  the  storage of  waste  oil  and
 hazardous waste  in 5 underground tanks located at  the location
 prior to  incineration  at the MKT facility previously discussed.
 Activities at the MBS location were discontinued in 1979.
 Because both locations were operated as one facility involving the
 same  ownership and waste,  they  were combined  and  collectively
 called the  McAdoo Associates site for evaluation in  the Hazard
 Ranking System (HRS) scoring process.  The site received a  score of
 63.03 and the  McAdoo  Associates site was  placed  on  the National
 Priorities List (NPL)  in September 1983.

With regard  to the MKT location,  all of the  drums  and  all site
 features, with the exception of one 15,000 gallon tank were removed
between January  1981  and October  1982.   The remaining  tank was
removed  in  November 1988.   An  RI/FS was  conducted  at  the MKT
 location by  an  EPA contractor in  1984,  and a Record of Decision
 (ROD) was issued on June 28, 1985, that addressed remedial action
of soil contamination at the MKT location.  However, the 1985 ROD
deferred the decision regarding any remedial action of ground water
and/or surface water (and related  sediment) pending additional
evaluation.

The selected remedial action for soil at the MKT location described
 in the 1985 ROD included the removal of remaining tanks  and debris;
limited excavation of  contaminated soils  with  off-site  disposal at

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a  RCRA facility; the  capping  of the MKT  location;  diversion of
surface water; maintenance of diversion ditches and site cover; and
long  term ground-water  monitoring.    All  soil  related  remedial
measures have been completed with the exception of the construction
of the site cover, which will be completed during Fall 1991.

With  regard  to  the  MBS   location,  based  on  subsequent  EPA
investigations of the tanks and tank contents, EPA issued  a ROD for
Interim  Remedial Measures   (IRM) on  June 5,  1984,  calling for
cleaning  and  removal  of   underground  tanks,  the  removal  of
contaminated  soil,   and  the sampling  of  subsurface  soil.   The
remedial work  was completed by EPA in 1985.   It should  be noted
that  the MBS  location 1984 IRM  ROD  included provisions  that a
supplemental ROD  would be  prepared  after the remedial action was
complete to  include recommendations for further site action, if
any.

Because  of  the  outstanding  issues  related  to  the  site,  a
supplemental  focused  RI/FS was conducted  by  EPA  during late
1990/early  1991   to  further evaluate  the  ground  water,  surface
water,  and sediment  at the MKT location,  and  to  evaluate the
remedial action performed at the related MBS location.


HIGHLIGHTS OF COMMUNITY PARTICIPATION

The public participation requirements of  CERCLA §S 113(k)(2)(B)(i-
v) , 117 and 121(f) (1) (G) , 42  U.S.C. §S 9613 (k) (2) (B) (i-v) , 9617 and
9621(f)(1)(G) have been met  by the following activities.

In July  1991,  the focused  RI/FS  study reports prepared by an EPA
contractor for this operable unit were released to the  public along
with the Proposed Plan developed  by EPA.  These documents were made
available to the public in both the administrative record file and
an information repository at the  McAdoo-Kelayres  Library  (Kelayres
Road,  McAdoo,  PA 18237),  and  USEPA Region  III  (841  Chestnut
Building, Philadelphia, PA 19107). The notice  of availability for
these two documents was published in the  Hazelton Standard Speaker
on July 22, 1991.  A  30-day public comment period began on July 22,
1991 and ended on August 21, 1991.

In addition, a public meeting was held on August 8, 1991 to discuss
the Proposed Plan.  At this  meeting, representatives  from EPA and
PADER answered questions about the Proposed Plan  and the  status of
the site.   All  comments which  were  received by  EPA during the
public comment period,  including  those  expressed  at the  public
meeting, are  addressed  in  the Responsiveness Summary,  which is
attached to this  Record of Decision.

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 SCOPE AND ROLE OF OPERABLE UNIT

 This is  the third  action to be implemented by EPA for the McAdoo
 Associates site. As stated previously, soil contamination has been
 previously  addressed by RODs prepared  for the McAdoo Associates
 site  (MKT  and  MBS  locations)  in  1985 and  1984,  respectively.
 Therefore this ROD  is intended to address  only the surface water,
 sediment, and ground water at the MKT location, and  ground water
 at the MBS  location.  These are the only  remaining environmental
 concerns at  the site.
SITE CHARACTERISTICS

As stated  above,  the  scope of this operable unit was to evaluate
the surface water, sediment,  and ground water at the MKT location
and ground-water at the MBS location.   To  evaluate these elements,
a focused  RI/FS was completed for the  site during late 1.990/early
1991.  The primary objectives  for the focused RI/FS were to collect
sufficient data to:

•  characterize  potential  contamination  of the  ground  water,
   surface water,  and  surface  channel sediments  in the vicinity of
   the MKT location;

•  determine if contamination  poses'a threat to human health or the
   environment;

•  identify and  characterize  all  migration pathways,  routes  of
   entry,  and receptors for contaminants detected (if any) in the
   ground  water (especially related to nearby residential wells),
   surface water,  or channel  sediment  in  the vicinity of the MKT
   location;

•  determine the  need  for remedial actions at the MKT location to
   address existing or potential threats posed by contaminants in
   the ground water beneath,  or in the surface water or channel
   sediments downstream of, the MKT location;

•  fully evaluate the  results  of the IBM ROD at the MBS location;
   and

•  provide  support  for  the  identification,  development,  and
   evaluation of  appropriate remedial  technology alternatives.

To provide the data necessary to accomplish  the objectives of the
focused  RI/FS,  a thorough  compilation,  characterization,  and
evaluation of  existing  information  and data was completed.   This
included  detailed evaluation of  regional and  local  geology and
hydrogeology, and review of all available information for the MBS
location.

                                8

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In  addition,  numerous field activities were performed at the MKT
location,  including  two rounds of ground-water sampling of 7 on-
site  monitoring wells and  7  off-site  residential wells, surface
water  and sediment  sampling from  10  locations,  and  a complete
ecological  assessment  of  the Little  Schuylkill  River  in  the
vicinity of the MKT location.  Evaluation of contaminant transport
pathways  and potential  risk  to human health  and environment is
based collectively on the efforts of this 1991 focused RI as well
as  previous  efforts  by  others (including  the EPA 1984 RI/FS, and
other  studies completed  by the Responsible  Parties consultants
during 1987 through 1990).  A detailed  description of the findings
of  the 1991  focused RI  follows.
MCADOO-KLINE TOWNSHIP  (MKT) LOCATION

SURFACE WATER/SEDIMENT INVESTIGATION

Ten surface water/sediment locations downstream of the MKT location
were sampled in December  1990 to evaluate current surface water and
sediment  quality  (Figure  5) .    Sample locations  included three
background  locations along Lofty Creek that had not been affected
by either the MKT  location or acid mine drainage  (AMD), and seven
locations   along   the  Little  Schuylkill  River,  including  the
Silverbrook Discharge  (Location  2 - Mine  Pool  outlet).  Surface
water samples were analyzed for Target Compound List (TCL) organics
(including  volatile  and  semivolatile organics and pesticides and
PCBs)  and  Target  Analyte List  (TAL)   inorganics   (metals  and
cyanide),   as   well   as   basic  water  quality  parameters  (pH,
temperature, alkalinity, TDS,  TSS,  etc.).   Sediments were analyzed
for TCL/TAL parameters,  pH, total organic  carbon, and  grain size.
It should be noted that  the Little Schuylkill River downstream of
the MKT location has been, and continues to be, severely affected
by AMD originating from the Silverbrook discharge,  and  former coal
mining activities  in the area.

The results of  the surface water sampling  are summarized in Table
1.  With regard to organics, only low concentrations  (ranging from
8  to  32  micrograms  per  liter  [ug/1])  of  carbon   disulfide,
chloromethane and bis (2-ethylhexyl) phthalate were detected in the
surface water.  However,  it is  not certain  that these compounds
originated from the MKT location.  Of the three compounds detected,
the  carbon disulfide  was detected  in field  blanks  (indicating
potential laboratory contamination).  Bis  (2-ethylhexyl) phthalate
was not detected in samples collected closest to  the MKT location,
rather  was only  detected in  downstream  samples  and  background
samples (indicating other potential sources).  Only chloromethane
was  detected  at  a  surface-water  sample  location near  the MKT
location,  however, this compound was  not detected  in any other
media (soils,  sediment,  or ground water) at the MKT location.

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                                                              SILVERBROOK
                                                            2 DISCHARGE
                                        UTTLC 3CMUYLJCILL
                                                 RIVER
LEGEND.

  • SURFACE WATER/SEDIMENT SAMPLE LOCATIONS




                 0         750       1500
                         FEET
FIGURE 5
SURFACE WATER/SEDIMENT SAMPLING
LOCATIONS
MCADOO-KLINE TOWNSHIP LOCATION
MCADOO, PENNSYLVANIA
                                       10

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Table 1
Surface Water Data Sumnary (a)
Organic and Inorganic Compounds
MKT LOCATION































0
_
(D
Z
rt
''•
















^
i~i











-6

0
TO
o
c
r—
*""1
s

COMPOUNDS (b)
Volatlles
carbon
dlsulflde
chloroform
chlorone thane
Seml-VoUtiles
bis (2-ethylhexyl)
ph thai ate
IiorgaHlct
Al um1 num
Antimony
Barium
Beryllium
Calcium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Nickel
Potassium
Selenium
Sodium
Thallium
Vandlum
Zinc
Cyanide


CW|L

5

5
10

10


200
6
200
5
5000
50
25
100
3
5000
15
40
5000
5
5000
10
50
20
10

(a) Sampling dates: 12/12/90
(b) Only elements detected are summa

SW-1

4B







947

29P

5930
16P

1170

2750P
353

740P
2B
12700


68


rlzed.

SW-2




32




4730

27P
3P
7380
59

10900
3B
6440
1250
59
1190P

10500


210




SW-3









4390

26P
2P
11500
41P
16P
4860
2B

SU-4






16L


3570

27P
2P
9120
38P
13P
3760
2B
5790 4850P
1050
47
569P

10900


174



871
41
566P

9170


150




SW-5






3L


3470

29P
2P
8980
36P
14P
4320
IB
4760P
847
38P
436P

9180


146



SW-5
(DUP)









3490

28P
2P
8940
37P
12P
3950
2B
4750P
841
33P
734P

8990


145



FIELD RINSE.
SW-6 SW-7 SW-8 SW-9 SW-10 BLANK BLANK

B

8


8L 10


1840 1780 322 283 285
56P
26P 25P 23P 23P 15P
IP
5260 5580 1260P 1180P 1010P
14P 18P
13P IIP
1800 1560 122 91P 1B7
IB
2770P 2820P 770P 718P 632P
464 441 74 73 67
23P
529P
IB
6950 7220 4030P 4170P 4560P 19BB 216B
2K

88 87 35 33 29



(c) All units ug/1 (total metals)




B - Not detected above levels measured In blanks
L - Analyte present. Value reported Is biased ION.
P - Analyte present.
K - Analyte present.

Quantltatlon may not
Reported value may be





actual value expected to be
be accurate.
biased high, actual


value

expected


higher.


to be lower.



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There  were a variety of  inorganics  present  in the surface water
samples collected from the Little Schuylkill River and Lofty Creek.
Inorganics present in the samples from the Little  Schuylkill River
at  high  concentrations  relative  to concentrations  detected in
background samples  from Lofty  Creek include aluminum, antimony,
beryllium,  calcium,  cobalt, copper,  iron,  magnesium, manganese,
nickel,   potassium,   sodium,   and   zinc.     In   general,   the
concentrations  of  inorganics  in  the  surface   water decreases
downstream as a  result  of  dilution and  chemical precipitation
associated with changing pH.  The elevated levels  of  inorganics in
the surface water is likely a result of the combination of AMD and
leaching  of  inorganics  from the MKT location into the mine pool.
Several of these elements  were  detected at high concentrations in
the soil at the MKT location, including aluminum,  iron, nickel, and
zinc.   However,  most  of  these  elements,  especially antimony,
beryllium,   iron,  aluminum,   calcium,   sodium,   potassium,  and
manganese, also occur naturally in high concentrations in the coal
and .coal  refuse in Pennsylvania Eastern Province  coals; therefore
their presence in the surface water is not unexpected.  Although it
is not possible to quantify the extent of inorganic  contribution
from  the   MKT  location to the mine  pool,  and  subsequently the
surface water (as compared to the contribution from AMD), based on
available data,  AMD  remains  the primary  controlling factor for
inorganics in the surface  water.

The results of the sediment sampling are summarized in Table 2  (see
Figure 5  for sample locations).

With respect to organic compounds, the results indicate there are
no volatile  organic  compounds present  in  the sediments  of the
Little  Schuylkill River  or Lofty  Creek.   However,  some  semi-
volatile   compounds   (namely  polynuclear  aromatic   hydrocarbons
[PAHs]) are  present   in the sediments from  nearly every station
sampled.   All  of  these  PAHs were previously detected  in soils at
the MKT location.  However, the presence of PAHs  in some, but not
all,   of   the  samples  collected,   including  background  sample
stations,   indicates   the  prevalence  of these  compounds in the
environment from various  sources.   The source of the PAHs in the
Little Schuylkill River may be  from MKT location run-off as well as
run-off from other areas draining into this basin,  including PA Rt.
309.   The  source of PAHs present in background samples from Lofty
Creek is unknown.

A wide range of inorganics were detected in sediment  samples from
the Little Schuylkill River and Lofty Creek.  Inorganics present in
sediment  from the Little Schuylkill River at high concentrations,
relative to concentrations measured in background  sediment samples
from Lofty Creek, include aluminum,  arsenic, beryllium, calcium,
cobalt, copper, iron,  lead, magnesium, manganese,  mercury, nickel,
potassium, sodium, vanadium, and zinc.  Some of these  elements were
detected  at high concentrations in the soil at the MKT location.
However, the presence of some of the  inorganics, at concentrations

                                12

-------
            Table 2

   Sediment Data Summary (a)
Organic and Inorganic Compounds
COMPOUNDS (b)
Volatile*
chloroform
Semi -Volatile*
phenol
2-chlorophenol
phenathrene
fluoranthene
pyrene
benzo(a) anthracene
chrysene
bis (2 ethyl hexyl) phthalate
benzo(b) fluoranthene
benzo(k) fluoranthene
benzo(a) pyrene
1ndeno(1.2.3-cd) pyrene
benzo(g.h) perylene
iMorgulcs
Al uml num
H- Arsenic
w Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
-^ercury
QNIckel
C potassium
^Selenium
r?Z Silver
Q. Oodlum
"Z. Cihalllum
f* .'Vandium
|— Ci)nc
I^yanlde
CROL
5
330
330
330
330
330
330
330
330
330
330
330
330
330

40
2
40
1
1
1000
2
10
5
20
0.6
1000
3
0.2
8
1000
1
2
1000
2
10
4
2
SED-01 SED-02

96L
240L
250L
140L
150L

130L
110L
84L
85L


1820
6J
157
0.41P

4100
20

19
11400
76
893P
1810
0.12
6P
257P
0.35P

99P

IIP
470



150L
170L









1660
4
14P

3
262P


14
31500
20
243P
48
0.22
294P
3

5BP


18

SED-03













1420
2P
8P


99P
6

18
8570
10
65P
17
0.62
311P
IP

69P
0.338

9

SED-04

210L
530L
550L
290L
280L
170L
210L
230L
190L
190L
200L

3340
9
31P

9
212P
18
4P
32
110E3
95
536P
332
0.17
7P
314P
3

68P


128
2
SED-05

260L
540L
600L
340L
320L
200L
240L
230L
200L
190L
200L

3190
11
77
0.42P
7
6160
333
20
28
90600
44
2490
4250
0.44
9P
145P
2

37P

100
124
3
{al Sampling date: 12/12/90
(b) Only compounds detected are suranarlzed.
(c) All units ug/kg except blanks which are ug/1.
SED-05
(OUP) SED-06
140L
140L
330L
B20L 200L
880L 290
530L 120L
530L 120L
130L
390L 85L
430L 93L
380L
300L
290L

2080 1770
5 3
20P 16P
0.25P 0.22P
5 2
3040 342P
9 10
5P
14 20
57700 31700
135 20
417P 290P
213 411
0.14
148P 156P
1
4
36P 44P

4P
71 41
3
SED-07


130L
1BOL
87L
90L

77L
79L




12BO
2
37P

2
278P
8

12
18200
20
242P
208
1.1
139P
0.81P
3
•

8P
30
SED-08 SED-09













1170
2P
5P


SIP


11
2830
8
78P
102

153P

4

0.32B

14



89L
120L









773
IP
3P


25B


7
1770
SB
70P
84

113P

2P



8

FIELD RINSE. TRIP
SEO-10 BLANK BLANK BLANK
6

140L
170L
110L
110L

79L
83L




6B4 56P
IP
8P


38B


2P
2370
SB IP
SOP
75
0.75
75P



4

9

B - Not detected above levels measured in blanks.
L - Analyte present. Value reported is biased low, actual value
expected to be higher.
P - Analyte present. Quanltatlon may not be accurate.

-------
detected,  are not exclusively the  result  of former MKT location
activities.   Most of  these  elements are found  in  coal and coal
waste.    Table  3  is  a  listing  of  the   inorganic   background
concentrations developed during the  1991 focused RI/FS  as related
to  former mining activities and AMD.  Comparison to  Table 3 values
show that most of the  inorganics present in the sediment  are within
expected background ranges for the area.

In   summary,   there  are  few,   if  any,   MKT  location-related
contaminants  (organics and inorganics) present in the surface water
and sediments in the  Little Schuylkill River.


ECOLOGICAL INVESTIGATION

The ecological  investigation  included a   characterization  and
evaluation of aquatic and terrestrial  habitats along the Little
Schuylkill  River.    The  aquatic  and terrestrial  habitats  were
identified,  measured   (where  appropriate),  and  described  at six
stations  (Stations  1, 2,  4,  5,  6,   and  8  - see Figure 5).   The
results of the ecological  investigation revealed that the aquatic
community of  the  Little  Schuylkill  River is severely affected by
AMD (i.e. there is very little aquatic life), although the aquatic
community appears to  be  less  affected at present relative to the
results  of a PADER  study  conducted in  1984.    The terrestrial
community was not affected.

In  summary, no ecological  impairment directly attributable to MKT
location-related contaminants was identified.
GROUND-WATER INVESTIGATION

The ground-water investigation consisted of two elements:  an on-
site  ground-water  investigation  and  an  off-site  ground-water
investigation.  The on-site ground-water investigation included the
characterization of MKT location hydrogeology and two rounds of MKT
location  monitoring well  sampling.   The off-site  ground-water
investigation   included   the   characterization   of   regional
hydrogeology and two rounds of off-site residential well sampling.
The results of each element follows.
ON-SITE GROUND-WATER INVESTIGATION

Regionally, the  MKT location is within  the Appalachian Mountain
section  of the  Ridge  and  Valley  Province,  within  a geologic
structure referred to as the Silver  Brook Syncline  (Figure  6 - see
Figure 3 for orientation of cross-section line).  Locally,  the MKT
location is underlain  by the Llewellyn and Pottsville  Formations
(Figure  7).    The  Llewellyn Formation  consists  of sandstones,
siltstones, and  shales,  with interbedded  coal.    Of  particular

                                14

-------
                                Table 3

      1991 RI Proposed* Inorganic  Background Concentration Ranges
           Former Mining Activity/Acid Mine  Drainage  Related

                             MKT  LOCATION
Element         Site Soils/Sediments'
                       (rag/kg)
Site Ground Water/Surface Water
            (•9/1)
aluminum
antimony
arsenic
bariim.
beryllium
cadmium
calcium
chromium
cobalt
copper
iron
lead
magnesium
manganese
mercury
nickel
potassium/sodium
selenium
silver
thallium
vanadium
zinc
16.000-47,000
0.9-1.2
6-27
40-200
.5-6
.3-27
120-700
20-75
0-7
10-75
4,400-12.000
10-15
0-100
3-620
.15-. 24
10-125
2,300-10,000
3-5
...
5
20-140
3-65
29-55*
...
...
...
0-.010*
0-.020*
119-194*
0-.010*
...
...
15-122*
...
68-83*
4'
...
0-1.23*
17*
— .
—
...
...
0.21-0.2'
   Given  that no  site  specific background data regarding AMD were
   available, general  background values for the site were derived for
   comparison purposes as part of the 1991 RI.  The general background
   values were derived by a USEPA contractor based on the following
   references for studies conducted at other AMD and coal mining sites
   in  Pennsylvania.

   Combination of National Research Council (1980), Click and Davis
   (1984). and Davis  (1984. personal communication)

   Gorilla Quarry Results (USEPA. 1985)

   Coal Nine Drainage  Terrs.  PA  (Nrtagu, 1978)

   Shamokin Creek. Welghscale. PA (Brown!ow. 1979)

   Combination of Sources b and c

  •  No Data Available
                                    15

-------
 MOUTH

   A
                  POTTCHUNK FAULT
    aooo*—i
CENTBALIA FAULT

  SILVER BROOK 8YNCLINE

        -BEARS HEAD FAULT

            -LOCUST MOUNTAIN ANTICLINE

                -LOFTY FAULT
   DELANO ANTICLINE




POTTCHUNK FAULT
                                                                                                              •TILL CREEK
                                                                                                                    ROAD
                                                                                                                   WELLS
                                                                      '..' •-•••••*• • •"•'..'-'.V 'jt
                                                                             •••-
                    •OUTH

                     A'
          |KHHHHHRyHHK»uaHH£iS5tHRhRR^
          -------------i-i-r-i-c-i-z-i-i-CH^^^^
        - -25->2-KK35HKrKHHKSKHHKKHKKHHHHHHKK:£KKHKH^
          Lr^^J^i^-Ti^vrLrLrt-ru —_ — — — — -.—. —^— — — — — — .>.*. — — .».-_ — _- — — — — *.«-^j— — — — *^j-•———•— —^-~~JT~——* ',f*- — ** —^~~~- —-_xj—^	—.— — —-~_n;—n" ~~"^_r"_"*__
          ---~-~-~-~-~-z-i<:-i->z-ioc->>i-i->r-^^
          ^>>I->IHK-I-Z-I-3^>_-_--------
UMMSfc

 |    | LLSWEUYN FORMATION W* a,S. * »i

 L'   1 POTTSVLLI FORMATION ww va.o». A «

 C33 MAUCN CHUNK FORMATION, Uf «• MEMIER WILVEMROOK ROAO-RESIOENTIAL WELLSI

 t»3j "AUCH CHUNK FORMATION, MIOOLE UCMMM ISTH.L CREEK ROAO-RESIOENTIAL WELLSI

 torn   RUCK MOUNTAIN COAL SEAM
                             SOURCE. ADAPTED FROM USDS MAPPING (WOOD 1 AHNUT, 18731
                                           FIGURE  6
                                           REGIONAL  GEOLOGIC  CROSS-SECTION
                                           MCADOO  AREA.  PENNSYLVANIA

-------
  SOUTH

    B'
                                            I— MAMMOUTH COAL SEAM
       MAMMOUTH COAL SEAM—i
BUCK MOUNTAIN
    COAL SEAM—i
  1700


  1800


  1500


  1400


  1300


  1200


  1100


  1000


  000
rN
CLINE — |
"X


| — HI
C(
y / /
           200
400
600
                                   —i—
                                   800
                                       r— BUCK MOUNTAIN
                                          COAL SEAM

                                           — CENTRALIA FAULT
                                                                   NORTH

                                                                     B
                                                                     MAMMOUTH COAL SEAM
                                                                   BUCK MOUNTAIN
                                                                   COAL SEAM
                                                                 MW-3B MW-2
                        1000
                                1200
                                1400
1800
1800
                                                        —i	
                                                         2000
                                                                        — r—
                                                                         2200
           LEGENDi

            |   |   LLEWELLYN FORMATION

            I   |   POTTSVILLE FORMATION



SEE FIGURE 6 FOR LOCATION OF B'-B CROSS SECTION LINE
                                                   FIGURE  7
                                                   LOCAL GEOLOGIC CROSS SECTION
                                                   MCADOO-KLINE TOWNSHIP LOCATION
                                                   MCADOO,  PENNSYLVANIA

-------
 importance  are  two major coal seams (Buck Mountain and Mammoth),
 both  of  which have been extensively mined in the vicinity of the
 MKT location.   The Pottsville Formation consists of well-cemented
 sandstones  and  conglomerates, although this formation is reported
 to be fractured.

 The hydrogeology at the MKT location is  controlled  by the local
 geology.   The shallow "aquifer" at  the MKT location consists of
 ground  water filled  mine workings  and other  subsurface voids,
 collectively called the "mine pool".  The  only known discharge for
 the mine pool  is  the Silverbrook discharge  to  the  south, which
 forms the upper reaches of the Little Schuylkill River.  The mine
 pool  is  located within  the  Llewellyn Formation  (Figure  7) ,  and
 ranges  in  depth from  approximately 50  to  200  feet  below ground
 surface  at  the  MKT location.  Horizontal ground-water flow at the
 MKT   location  is  generally  toward  the  south,  in  the  general
 direction  of the  Silverbrook  discharge  (Figure  8) .  A schematic
 hydrogeologic   cross-section   for  the   MKT  location  depicting
 subsurface  conditions  is given in Figure 9.   Based on water level
 readings obtained  from wells screened in the underlying Pottsville
 Formation  (MW-l, MW-2, MW-3B and MW-4), the vertical
 ground-water  gradient at the MKT  location is upward,  indicating
 that ground-water is flowing from the Pottsville Formation  into the
 mine  pool, and subsequently flowing out  the Silverbrook discharge.
 Consequently  it follows that the mine pool at the MKT location is
 not hydrologically connected to other aquifers in the area.

 The 7 on-site monitoring wells that were installed during the 1984
 RI (see  Figure  8)  were sampled in December 1990 and February 1991
 to evaluate current ground-water quality at the MKT location. Four
 of the  wells (MW-l, MW-2, MW-3B,  and MW-4)  are  screened in the
 Pottsville  Formation,  and wells MW-5 and  MW-9 are reported to be
 screened in the mine  pool.   Wells MW-l  and  MW-2 are considered
 upgradient  of the  MKT location  and not  affected by AMD.  Ground-
 water samples were analyzed for TCL and TAL (total and dissolved)
 parameters.   A  summary of  organic and inorganic sampling results
 from  the  two  sampling  events  are  given in  Tables  4   and  5,
 respectively.

 The 1991 focused RI results indicate that low  levels of organic
 compounds are present in the mine pool ground water  at  the MKT
 location.   Low  levels of 1,1 dichloroethane,  1,1 dichloroethene,
 and 1,1,1  trichloroethane  were detected  in the sample collected
 from MW-5 (and duplicate) in both sampling events,  with toluene and
 xylenes  detected in the second round only at  very low "J" flagged
 values (Note - a "J" qualifier denotes that an analyte is present,
 but the reported value may not be  accurate or  precise).  Also, 1,1
dichloroethane,   1,1 dichloroethene,  1,2 dichloropropane,  and bis
 (2-ethylhexyl)  phthalate  were  detected  in the  first  sample
collected from MW-9.  Additionally, 1,1,1 trichloroethane and 1,2
dichloroethane  were  detected  in  the second sample  from MW-9,
although the  phthalate was  not.   A  "J"  flagged value  of 1,1,1

                                18

-------
i
                                                  MINE POOL EVEVATION

                                                        fl564t
    LEGENDi
          MONITORINQ WELLS
     |t584.3| GROUND-WATER ELEVATION


       \| GROUND-WATER FLOW DIRECTION
           q

           O
           O
FEET ABOVE SEA LEVEL
                                                                                            200'
FIGURE 8
GROUNOWATER POTENTIOMETRIC  MAP
APRIL  25  1991
MCADOO-KLINE TOWNSHIP LOCATION
MCADOO,  PENNSYLVANIA

-------
NJ
P
NW A ^-^ A' SE
1625 -,
1620-
1610 _


1600-


1590-


i&nn
iwou —


1570 -
(A
a
u 1560 -
O
ffl
S1550 -
u.
Z 1540 -
tj
> 1530 -
LI
1520 -


4K4A
1S1O —
^
*
.
FRACTURED
POTT4VILLI
ROD I SOX
•
• ,

*

, •


MAS4IVI
POTTSVLLE
C«MI r
4 •• \~
* MOD 1 MX 1=
\-
* t
o
^ - *fc^

• *

•
.


* •

•


*
f
///y--/-. ..V
v /FUl/AMD/OR / / ,
. -/WiftHIRID ROCK / /
< A // / '
- / / .rqAcrURCo
• • - /. . v •• • Cengl
FRACTURED '. "°D °'at*
•• 4 C*ntl • .
MOD • MX \
^f i
• i (
• • UPPfiR WICK'
• = MTM. COAL
= ROQ 0-I7X
LM» FRACTURED = ',
•• • CM^ _ TIOHT 8<
H ROD > ifX ROD 70;IOOX



FRACTURED •
A •
••
MOO iOX •
•
POTTSVILLE
FORMATION •
• * .
.

.
•

^^—^^
i
• * ?'< r
^\T_s
\\ ^
• * • »'
• %'
• r\
' ' '"VI
-
k>'*
/ f /^ / / " " /" - - - - - ^
/ / / / / / '/ / /"^ A
" •/, // // / / / / /
I. "< ,/ / /FILL AND/OR X /' /
x < / /WEAtMERED ROCK / /
) UPPER RUCK ^ - / / / / / / /
.)MTN. COAL "~-/ / / / / /
v ^/ / / / /
" " < / / / /
~'~ / /
^ _ / / /
- */ /
•• 4 Con«l " <* /
""-.


_y T
FRACTURED AND -
DECOMPOSED :
Si -
ROD JO-UX :
LLEWELLYN :
FORMATION
:|
• • • ' 'i
\ 1— 1 BUCK MTM. COAL IMME POOLI
• ' Hr1 VOID 4 OOB FILLED :
* 'V^-. ?

POTTSVILLE ' " " . PUCKMTM.,
FORMATION • . . " COAL M
"".--(-..

O

1440 —
1430 -

1420 -
• • f-
l_
* -
* HARD CONQL. E
. ROD sa-MOX "n
- .













-
-.
-







HOIE GROUTED
TO 00.0 Fl.
' DEPTH
1625
1620
- 1610


- 1600


- 1590


icon
— loou


- 1570


- 1560


- 1550

- 1540

- 1530

- 1520


•ic-in
— IW •*»
100' 200'
^v***nt*k^ *\
"— ^.^i_J FIGURE 9

HORIZONTAL SCALE SCHEMATIC HYDROGEOLOGIC
E ' LEOEH0. CROSS-SECTION
,| . V GROUND WATER ELEVATION 14-26 Oil MCADOO -KLINE TOWNSHIP LOCATION
1 s. SANDSTONE MCADOO, PENNSYLVANIA
1423 A
, * * •***•• Conflj CONOLOUERATE
ROD ROCK QUALITY DETERMINATION

-------
                                                          Table  4

                                               Ground-Water Data Summary  (a)
                                                     Organic Compounds
                                                     Monitoring Wells

                                                       MKT LOCATION
COMPOUND (b)
Volatile*
1.1 dlchloroethene
1.1 dlchloroethane
chloroform
1.1,1 trlchloroethane
1,2-dlchloropropane
•ethyl ene chloride
SMl-Volatlles
bis (2-ethythexyl) phthalate
(a) Sampling dates: 12/19/90 and
(b) Only compounds detected are si
(c) All units ug/1
MU-5 FIELD RINSE TRIP
CRQL(c) HW-1 NW-2 NW-3 MW-3B HW-4 HW-5 (DUP) HW-9 BLANK BLANK BLANK

5 5 3J 3J
5 18 21 4J
5 3J 4J 4J
5 30J 27J
5 270J
5 4J 4J

10 10
12/20/90
••arlzed.
J   Analyte present.  Reported value My not be accurate or  precise.

-------
     Table 4 (continued)

Ground-Water Data Summary (a)
          Inorganics
      Monitoring Wells

        HKT  LOCATION
HW-1 MU-2
ELEMENT CRDL
b) (c)
11 * ' T(d) D(e) T
MumlnuM 200 188B 151B 282B
9ariu> 200 98P 90P 87B
Beryl HUB 5
Cad*1u» 5 16 16 4P
Calcium 5000 6530L 6190L 4300L
Chromium 10 9P
Cobalt 50
:opper 25 IBP 13P 30
Iron 100 297 31P 395
Lead 3 14L 30L
Ugnesiua 5000 3500L 3270P 3470P
Unganese 15 219 200 212
tlckel 40 47B 45B 43B
>otassiun 5000 1870B 2260B 1990S
illver 10
fandlun 50
!inc 20 81 77 99


D
178B
89P


4270L

10B
18P
31P
30
3330P
216
33B
1480B
IP

99
MW-3


T D
191E3
112P 13B
23
2P
37E3L 9040L
45
179 388
155
69E3 3470
305L
3757P 2470P
2020 822
1836 79B
5480B 4460B

9P
836 35B
MW-3B


T
6970
213


8640L

648
23P
14800
19L
6890
2290
150
2160B
IP

145


D
870
178P


8120L

49B
13P
38P
36
5180
1850
SOB
1320B


109
a Sampling dates: 12/19/90 and 12/20/90
b Only elements detected are summarized.
c All units ug/1
d) T - Total metals (unfiltered)
e) 0 - Dissolved metals (filtered)












MW-4


. T D
985
38 29


11900 10200
19L


2440 J 30 1L
8L
5870 5030
1850 1820L
62 29L
2140L 2380L
3J

101 23
MW-5 MW-S(DUP)


T
517
66P


10200

41P

43E3J
21
5540
6650
44
2440L
2J

74


D T
604
48P 85P


6950 11300
9L
31P 41P

33700 43E3J
23
4290 5760
6300L 6550
32P 46.1
2280L
1J 2J

39J 72


D

47P


6540

33P

31600

3900P
4560
18P
1SOOL
2J

36
MU-9 FIELD BLANK


T
21500
618
3P
12
17E3L

75B
159
2230
23L
8340
1770
514
24BOB


367


DTD
18200
24B
4P
4P . 2P
18E3L 90B

918 16B
150
110 28B
12 4B
8370
1830
400
2660B
21

362
B - Not detected above levels measured in blanks.
L - Analyte present. Value reported is biased low, actual value expected
P - Analyte


present.


RINSE BLANK


T D
* 119P
18P


129L

15B 11B




6P
20P
490B 350B


9P
to be higher.
Quantltatlon my not be accurate











-------
           Table 5

Ground-Water Data Sunmary (a)
      Organic Compounds
      Monitoring Wells

        NKT LOCATION
COMPOUND (b)
VoUtlUs
1.1 dlchloroethene
1.1 dlchloroe thane
chloroform
1.1.1 trlchloroethane
1,2-dlchloropropane
Mthylene chloride
1.2 dlchloroethane
tol uene
total xylenes
CRQL(c) NW-1 HW-2 HW-3 NW-3B HW-4

5
5
5 0.7B
5 4J
5
5
5
5
5
MW-9 FIELD RINSE TRIP
NW-5 HW-9 DUP BLANK BLANK BLANK

3J 2J 2J
19 5 5
0.6B ZJ 2J 2J
43 150 140
400'" 400"'
3J 3J 30
1J 1J
0.5J
0.9J
a) Sampling date: 2/21/91
ibi Only compounds detected are simarlzed.
I c i All units ug/1
id) QuantUated fro* Secondary Dilution
J Analyte present. Reported value May not be accurate or precise.

-------
                                                                          Table 5'(continued)

                                                                     Ground-Water Data Sumnary (a)
                                                                               Inorganics
                                                                           Monitoring Wells

                                                                             NKT LOCATION
ELEMENT CRDL
(b) (c)
AluMinuM 200
Arsenic 10
BarluM 200
Beryl HUM 5
CadMluM 5
CalcluM 5000
ChroMluM 10
Cobalt 50
K> Copper 25
^ Iron 100
Lead 3
MagnesluM 5000
Manganese 15
Mercury 0.2
Nickel 40
PotassluM 5000
SodluM 5000
VandluM 50
Zinc 20
MU-1 MW-2
T(d) D(e) T
1248 1248 223

89. 5P 95P 92. IP

3.38 2.2B 2.3P
8440 8750 4870P
3.28 2.38 3.78
2.2P 5.3P 6.2P
15. 6P 20. 6B 21.78
1638 21.38 259
9.3K 6. SB 8.6K
4710P 5000P 39SOP
319 339 240

27.68 52. IB 38. OB
14808 1530B 1300B
95800 101E3 69700

1158 128B 139B
D
210

86. 7P

2.78
4800P

8. OP
55.28
16.98
11. 8J
5000P
235

36.28
13708
70600

1368
MU-3
T D
86400 191P
11.2
5360 IS. IP

2.68 3. OB
9840 6470
144
95.7 42. 2P
196J 38. IB
136E3 1308
178K 4.0
13500 2350P
2070 737
0.98
138 100
977D 2880P
96300 97500
76.1
496 120
MU-3B
T
12300
3.2P
254


9470
22.2
87.8
65. 8B
24900
45. 5K
8110
3060
0.24
57. 3B
3660P
121E3
15. OP
24. BB
D
534

191P

2.06
9000
2.3B
69.7
33.98
340
2.2B
5540
2410

81.48
1770B
119E3

139B
MW-4
T D
1180 15.08

42. 6P 32. IP


10300 9920
7.18
6.5P 4. OP
7.6B 74. U
2300 99. SB
9.2 9.1J
5370 5130
1950 1910

36. 6B 26. 2B
2010B 1770B
172E3 174E3

82.28 102B
MW-5
T
1440

54. 6P

2.66
7890
10. 8B
195
25. SB
42500
11.8
3800P
5150

27. OB
1480B
25000

101B
D
24. 4B
3. IP
37. 6P


5760
3. SB
50.3
28.48
40500
17. 9J
3620P
5840

21. IB
11006
24600

76.96
MU-9
T
22100
3.5J
193P
7.3
2.76
24800
24.1
166
184J
12700
16. IK
12000
2970

161
3850P
54700
7.4P
SIS
D
16300

14. 6P
5.8

24500
3. OB
158
145J
91. 2B
8. OB
10700
2700

142
3120P
54400

481
MU-9 (DUP)
T D
24700 16400
4.2P
278 14. OP
7.7 4.3P
2. 66 3.16
24600 24600
48.1 2.26
166 157
180J 167J
19300 80.48
16. 6K 9.9J
12400 10700
3010 2730

163 145
4410P 2850P
53600 54500
12. 3P
509 490
FIELD BLANK RINSE BLANK
T D T D
16.76 13. 7B 36.2 16.26

1.3P

2.26
392B 31.96 153P 22. 9P
3.46 2.16

7.86 7.16 27.88 2.76
13.56 8.66 44.3 8. 88
1.36 1.46 1.76 1.5B
27.78


17.96
4216
98.66 1316 2546 1006

11.26 16. SB 54.46
a) Sampling date: 2/21/91
b Only eleoents detected are sunnarlzed.
c All units ug/1
d T - Total Metals (unflltered) .
e) D - Dissolved netals (filtered)
B - Not detected above  levels Measured  In'blanks.         J  -  Analyte  present.  Reported value nay not be accurate or precise.
L - Analyte present.  Value  reported  Is biased  low,  actual  value  expected  to be higher.
P - Analyte present.  Quantltatlon May  not  be accurate.

-------
trichloroethane  was reported  in MW-3  from the  second sampling
event.   The MKT  location is  the  most likely source  of organic
compounds in the mine pool, given that no organics were detected in
upgradient  monitoring  wells.  Chloroform  and  methylene chloride
detections  in  both  rounds  appear to  be  derived from  lab blank
contamination.

Inorganics  detected in monitoring wells at  the  MKT location are
attributed  to  a  combination  of  naturally elevated  background
conditions, the effects of mining and AMD,  and  former MKT location
activities.  The naturally elevated pH of the ground water results
in the  high concentrations of inorganics  in the ground water by
causing pH  extensive dissolution of inorganics from soils at the
MKT location and from  the country rock in the  subsurface.  Of the
inorganics  detected in ground water, iron, manganese, beryllium,
and nickel are associated with AMD.   Inorganics that were detected
at levels within background concentrations include barium, cadmium,
lead, copper, and aluminum.   Arsenic and chromium were detected in
one -sample  from sampling  event, but  they were  not  detected in
surface water downgradient from the site.  Only  cobalt, silver, and
zinc were detected in concentrations that might  be considered site-
related.

OFF-SITE GROUND-WATER  INVESTIGATION

The residential wells  located  on Silverbrook Road and Still Creek
Road draw water from the water  bearing zones within the Mauch Chunk
Formation (see  Figure  6), which  is not present at the surface at
the MKT location.  Previous EPA studies completed in 1984 and 1985
both concluded  that the residential wells were  not  likely to be
hydrologically  connected  to  the  MKT  location.   However,  the
hydrogeologic relationship was re-evaluated during the  1991 focused
RI, and nearby residential wells were resampled.

Ground-water elevations measured on December 19  and 20, 1990, in
residential areas  and  general  flow directions  in  the MKT location
vicinity  are shown schematically  in Figure  10.   A  generally
southerly hydrologic gradient is  indicated by the  water elevations,
with the highest water elevations measured  in the Silverbrook Road
residences,  lower  water  elevations  in the MKT location wells
(decreasing from north to south across the MKT location), and the
lowest measured levels occurring in  the  residential  wells along
Still Creek Road.

Based on water level information, the Silverbrook Road residential
wells are hydrologically upgradient from the wells at  the MKT
location.   Residential well  pumping is not considered to be of
sufficient  magnitude to change this  general flow direction.   In
addition  to occurring hydrologically  upgradient  from  the  MKT
location, the residential wells along Silverbrook Road are situated
"across geologic structure"  from the MKT location.   Ground water
movement  in sedimentary or  meta-sedimentary  rocks is  likely to

                                25

-------
LOFTY CREEK
                                                    CRASHER 16681
                                         */l POTTEN   d6Z?J W^^o
                                             ;i654i«   —<«rTio>0
                                                       WATER LEVELS (2-20-91)
                                                       MW-1.MW-2

                                                       MW-3B.MW-4
                                                       MW-3,MW-5,MW-9
                                                   GROUND ELEVATIONS AT RESIDENTIAL WELL
                                                   LOCATIONS WERE APPROXIMATED FROM
                                                   U-S.O.S. TOPOGRAPHIC SHEETS
            UTTLC 3CHUYLKILL
                     RIVER
 LEGEND.

   •  RESIDENTIAL WELL SAMPLE


      GENERAL GROUND-WATER FLOW DIRECTION


 [10001 GROUND WATER ELEVATION IFEET ABOVE SEA LEVEL!

(JOOO^SURFACE WATER ELEVATION IFEET ABOVE SEA LEVELJ

                      0          750       1500
                                                                     /V^-
                                                                 X,^
                                                                      /  \J  ^\
                                                                  '  \v   \y
                                                                 ^^
                             FEET
                                               FIGURE 10
                                               REGIONAL GROUND-WATER  FLOW
                                               MCADOO AREA,  PENNSYLVANIA
                                         26

-------
preferentially occur along, rather than across, planer structural
zones such as bedding planes and faults.  Therefore, in order for
ground water from the MKT  location to reach the residential wells
located  along  Silverbrook Road,  it  would  have  to  flow  both
upgradient and across geologic structure, neither of which are
probable.  Finally, the well cemented lithology of the Pottsville
Formation has  been  reported to act as  a  barrier  to ground water
movement in the area.

The residential wells along Still Creek Road are located south of
the MKT  location,  which  is nominally  considered hydrologically
"downgradient."  However, the occurrence of the Little Schuylkill
River and  its  proximity to the  residential  wells induces ground
water flow towards  the  river,  or to the southwest on the eastern
side of the river.   Additionally, the residential wells are located
along the axis of the Delano Syncline in the Middle Member of the
Mauch Chunk Formation.  At the MKT location,  this geologic unit is
encountered only in the subsurface at a  depth of greater than 2000
feet  (Figure 6).  In order for ground water from the MKT location
to reach the residential wells located along Still Creek Road, it
would have to  flow across  several  intercepting zones,  including
bedding planes and  four large fault zones, which is unlikely.

Given the MKT location and regional geology and hydrogeology, the
residential  wells  and  Honey  Brook  water supply  wells  are not
hydrologically connected to the MKT location.   Consequently, there
is  no complete  ground-water  migration  pathway between  the MKT
location and nearby residential wells.

The   off-site   ground-water  sampling  that   was   conducted  in
conjunction with the 1991 focused RI included six residential wells
(see Figure 10)  and  the Honey Brook Water Company well(s)  (near the
MBS location).  Ground-water samples were collected in March 1990
and December 1990 from three residential wells located along Silver
Brook Road (north of the MKT location) and three residential wells
located  along Still  Creek  Road  (south  of  the MKT  location).
Ground-water samples  obtained from residential tap sources were
analyzed for TCL and  TAL  (total only).   A summary of organic and
inorganic sampling results for the two sampling events is given in
Table 6.

Only a few compounds  were  detected in the samples collected from
the residential  wells.    Methylene chloride was  most frequently
detected, especially in the first sampling event, but it was also
detected  in  QA/QC  blanks,   thus  is   a  suspected  laboratory
contaminant.   The source of the other organics that were detected
is unknown, but their levels are below relevant  maximum contaminant
concentrations.   Several  inorganics were  also detected  in the
residential tap water samples,  although concentrations were also
below relevant maximum contaminant levels.
                                27

-------
                                                                               Table 6

                                                                      Ground-Water Data Surmary
                                                                          Organic Compounds
                                                                          Residential Uells

                                                                             HKT  LOCATION

                                                                                 1990
                             Clymer     Orasher      Potten       Klein      Uesner       Rltslck     Krushlnsky   Krushinsky      Honey        FIELD        TRIP
                              TAP         TAP	TAP         TAP         TAP	TAP	TAP        TAP (DUP)       Brook        BLANK        BLANK
 COMPOUNDS (a)
 VOLATILE!
                CRQL
                 (b)
                          3/21 12/20  3/21 12/19   3/21  12/19   3/21  12/19  3/21 12/19  3/21  12/19   3/21  12/19   3/21  12/19   3/21  12/19   3/21  12/19  3/21  12/19
 chloroform

 •ethyl ene
 chloride
 tHchloroethane
                                                                                       0.3
                                                                                                                          0.2J
                           0.8B         0.6B        0.7B


                                              1.0   0.8J
0.9B
IB
                         0.7B
                                                   IB
                                                                            2B
                                                                                        IB
 tetrachloroethene
                                                                                       0.5
 SEMI-VOLATUES

 •ethoxychlor

 dleldrln

 alpha-chlordane
                                                                                                                                             .0310
                                                                                         .0083J

                                                                                         .00420
 1a) Only elements detected are s
 b)	
All units ug/1
                                rlzed.
B - Not detected above levels Measured In blanks
L - Analyte present.  Value reported Is biased low, actual value expected to be higher.
P - Analyte present.  Quant1 tat1 on *ay not be accurate.
J - Analyte present.  Reported value My not be accurate or precise.

-------
                                                                          Table 6 (continued)

                                                                       Ground-Hater Data Sumnary
                                                                               Inorganics
                                                                           Residential  Wells
MKT LOCATION
1990
ELEMENT
Aluminum
Antimony
Arsenl c
Barium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vandlum
Zinc
(a) Only el en
jb) All units
* * *• _ A J_i__
CRDL
(b)
200
60
10
200
5
5000
10
50
25
100
3
5000
15
40
5000
5
10
5000
10
50
20
ents
UQ/1
Clyner
TAP
3/21 12/20
297 119P


92 67P

11E3J 9450
14L
9
1990 209L
11 72B
5 4K
9680 7980
934 386
15 34P
1910 1190L


76605 190L


75 40
detected are s
(total metals
Drasher
TAP
3/21




3B
1090J


899

22
2210
7B

530


1680


40
12/19





1360P


304
163L
12
2040P
IIP




1760P

11B
26B
Pot ten
TAP
3/21 12/19
206




3260J 3450P


2300 130
886 26L
7 4
2210 2080P
4B 5P
43
290


971 1360P

SB
26 10B
Klein Uesner
TAP TAP
3/21 12/19 3/21
264


104
38
807J 1240L 9590J


101 44L 35B
9B 586 754
7 3
481 527B 3390
394
46
191 1330
3

1240 770L 23E3


11 13P 20
12/19
156P


94P

9680



260L
2P
3340P
363
22P
865L


25E3L


18P
Ritsick
TAP
3/21 12/19
182
30

13 12P
68
9520J 8560

6
9790L 525
158 758
28 23
2340 2640P
6B 5L
49
804 430L


14E3 11E3L


127 25
Krushinsky
TAP
3/21
186


79

20E3J


1780
2BB
41
4750
150

1910


56600


175
12/19



61P

13000


371
118L
20
3050P
114
58
395P


36300


57
Krushinsky FIELD RINSE
TAP (DUP) Honeybrook BLANK BLANK
3/21 12/19 3/21 12/19 3/21 12/19 3/21 12/19
166B 1626 183

4L
51P
26
12400 20E3J 19900


271 9B
120L 216 27B 98
16 4 2K IP
3030P 2040 2070B
106
47 49
350L 249


36400 3980 3640L 1356 4108 816
26K
166
41B 126
unurlzed.
L - Analyte present.  Value reported Is biased low, actual value expected to be higher.
P - Analyte present.  Quantitatlon may not be accurate.
J - Analyte present.  Reported value may not be accurate or precise.
K - Analyte present.  Reported value may be biased high, actual value expected to be lower.

-------
MCADOO-BLAINE STREET  (MBS) LOCATION

BACKGROUND INFORMATION REVIEW

The 1991 focused RI evaluated the results of confirmatory sampling
performed by EPA as part of the removal of five underground tanks
and approximately  3000 cubic yards of contaminated soil from the
MBS location in  1985.  Twelve soil samples were collected during
1985  removal  activities  at  locations  shown  in  Figure 11.   In
addition,  5  surface  water  samples were  collected in  1985 from
surface  water  features  in the  vicinity of the MBS  location,  at
locations depicted in Figure 12.  All samples were analyzed for a
complete  list  of  organic   compounds _ and  inorganics  (Priority
Pollutant List).

The results of  confirmatory  soil and surface  water  sampling are
given  in Tables 7 and 8.   The  results indicate that  a  few MBS
location-related contaminants (organics and inorganics) remain in
the subsurface soil.  Regarding surface water,  four organics and
three inorganics were detected in the sample collected in the sewer
outfall.  In summary,  the results of the historic soil and surface
water  sampling,   and  recent  sampling  of  the  Honeybrook  wells
indicate that MBS location related contaminants have not affected
nearby surface water features or public water supply wells.
                                30

-------
               -APPROXIMATE LOCATION OF 27* SEWER
                                                                                                  ss-oo2(6"ai2")
                                                          ILTER BARRIER
                                                         FENCE
                                                                                        CLEAN" SOIL PILE
                            L-	
                            /    *SS-009
                                                                                         "DIRTY"
                                                                                         SOIL PILE

                                                                  SOLP.LE
                                                APPROXIMATE LOCATION OF
                                                  TOP OF EXCAVATION
                                                     TOP  OF DIVERSION DIKE
                 NOTE'SS-OOt, SS-OO2-6". aSS-OO2-l2*ARE COMPOSITE SAMPLES TAKEN FROM THE 4 LOCATIONS SHOWN
         «or TO SCALE
SOURCE:  NUS IRM FINAL REPORT, BLAINE STREET SHE, JULY 1986
FIGURE  11
SOIL  SAMPLING  LOCATIONS
MCADOO-BLAINE  STREET  LOCATION
MCADOO,  PENNSYLVANIA

-------
                    M iN v  '•  •;• -; L:
               -i  SW-003 a SW-003A
                Kel«yrgft'.-.:rr;.V.-'jf
                    S :'.'."* ' leuj-/-
                                            FIGURE 12
                                            SURFACE WATER SAMPLING LOCATIONS
                                            MCADOO-BLAINE  STREET LOCATION
                                            MCADOO, PENNSYLVANIA
APPROXIMATE SCALE  I" • 2000'
SOURCE: NUS IRM FINAL REPORT, 3LAIME STREET
      SITE, JULY 1986
                                                              POUK
                                                                 ORIGINAL

-------
                                                                         Table 7
                                                         Contaminants Detected in Soil - Phase 1
                                                                       HBS LOCATION
                                                               (results reported In /jg/kg)"1
        Contaminants
Monocvcllc Aromatics
  Total xylenes

Haloqenated Aliphatics
  Methylene chlorld
                                   •Contaminated*
                                     Soil Pile -
                                     Composite
                                        001
                  Ide
 Phthalate Esters
    B1s(Z-ethylhexyl)phthai ate

 Polynuclear Aromatic
 Hydrocarbons
   Naphthalene
    2-Methylnaphthalene
   Acenaphthylene
   Pyrene
    Fluoroanthene
   Phenanthrene
4  Acenaphthene
*>   Fluorene
    Anthracene
    Benzo(a)anthracene
    Chrysene
    Benzo(k)f1uoranthene
    Benzompvrene
    Indeno(l.Z.3-cd)pyrene
    D1benzo(a,h)anthracene
    Benzo(g,h.1)perylene

 Pesticides
                                        180




                                        260



                                        140
                                        24
                                        49
 -BHC (llndane)
Heptachlor epo>
4.4'-DDE
4.4'-DDT
              epoxlde
Inorganics  fag/kg)
   Chromium
   Copper
   Lead
   Mercury
   Nickel
   Zinc

Percent Moisture
                                        15
                                        26
                                        99
                                       0.2

                                       119

                                        17
                                                  "Uncontamlnated*
                                                    Soil Pile -
                                                  	Composite
                                                  OOZ-6   OOZ-1Z
                                                    13
                                                    19
                                                   114
                                                   0.3
                                                    22
                                                    91
    Pit  Floor
   53    "DW
                                                                                                Pit Wall
                                                                                          1)05
                                                                                                  006
                                                  15.000    1.100
                                                   1,600
                                                                           6.500




                                                                           l.BOO

                                                                           1.900
                              150
                               24
                                        77
                                       120
                                                                                                     80
                                                                                                     56
 12
 24
161
0.2
 18
 93

 13
   10
    4
0.023
  0.3

   20

   10
 5

34
32

10
  7
 29
 61
0.3

164

 19
  9
 24
115
0.2

•73

 12
notes:
'"Lab results validated by NUS Corporation
Samples 001. 002-6, and 002-12 Mere composites from four areas within each pile.
Sample 002-12 was collected at a depth of 12 Inches.
Samples 005-007 were collected at a depth of approximately 6-8 feet.
                                              007
                            35
                                       35
                                       63
                                      180
                                      380
                                      180
                                                                                                          93
                                                                                                         110
                                                                                                         180
                                                                                                         130
                                                                                                         100
                                                                                                             16
                                                                                                             91
 16
 24
115
0.3

102

 12
                                                                                                                    008
                             30
                                       91
                                      170
                                      340
                                      140
                                                          60
                                                          89
                                                         200
                                                         120
                                                          96
                                                                                                                        44
                                                                   Trench
                                                                                                                                008A
                            82
                                     30
                                     57
                                     86
                                     30
                                                                                                                                14
                                                                                                                                     009
                                                                                                                                      2,400
                                                                                                                                     3.700
                                   "DTP





                                    470


                                    130


                                    540
                                            210
                                            310
                                          1.700
                                          2.600
                                          3.100
                                          1.800
                                            120
                                            460
                                            870
                                          1.400
                                          2.500
                                          2.200
                                          1,900
                                          1.800
                                          2,100
                                          2.400
                                                                                                                                               4.9
12
23
104
0.1
165
17
9
15
114
0.3
87
14
11
23
114
0.2
90
10
11
38
267
0.3
174
16
                                                                                       Sample 002-6 was collected at a depth of 6 inches.
                                                                                       Samples 003, 004. 008-010 were collected at a depth of  12 feet.
                                                                                       SOURCE:  NUS Corporation IRM Final Report - July  1986

-------
                                                                    Table 8
                                                    Contaminants Detected In Surface Water
                                                                 MBS LOCATION
                                                          (results reported In pg/l)("
                                                                                                                            SW-004
                                                                                  SW-003          SU-003A               Sewer Outfall
                                                  SW-001          SU-002           West of         West of                (Downstream
	Contaminant	                      Reservoir'        Bridge             Site            Site                    of Site)
Halogenated Allphatlcs
  1.1.1-Trlchloroethane                                                                                                     200
  Methylene chloride                                                                                                         89
Ketones
  Acetone                                                                                                                    21
Phthalate Esters
  B1s(2-ethy1hexyl)phthalate                                                                                                   4
Inorganics
  Antimony                                                                              15
  Chromium                                                            3                                                        3
  Copper                                              64                  55                    60
  Zinc                                               29             40                 36              49                    90
(1)    Note:   Only compounds detected ire presented
SOURCE:  NUS Corporation IRM Final Report - July  1986

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SUMMARY OF SITE RISKS

As part of the  scope of work of the 1991 focused RI/FS completed
for the site, a baseline risk assessment (RA) was performed.  The
RA typically, evaluates the current and potential future risk(s) to
human  health and  the  environment as  a  result  of  site-related
contaminants.  It should be noted  that most of the previous risks
to human health and environment posed by the McAdoo Associates site
were  addressed  as part of the  1984  IRM ROD removing  tanks and
contaminated soils at the MBS location, and the 1985 ROD removing
contaminated soil and  installing a cap  on  the entire area at the
MKT location.

A  summary  of   risks to  human  health  and   the  environment  as
determined in the RA is set forth  below.  This section summarizes
the  findings  of  the  human health  risk  and   ecological  risk
assessment for the McAdoo Associates site.   A summary of the risk
assessment,  including  a  description  of  the   contaminants  of
potential  concern,  exposure pathways  of concern,  and potential
carcinogenic risks and  noncarcinogenic  hazards  estimated for the
pathways quantitatively evaluated  in the RI report is included in
this section.
Contaminants of Potential Concern

Of  the  compounds   detected  at  the  McAdoo  Associates  site,
contaminants of potential concern  were selected based on several
criteria,  including  evaluating the percent  contribution of risk
using derived risk factors,  and the likely effect of former mining
activities and  acid  mine drainage on  the area.   Contaminants of
potential  concern were  selected  for  ground  water  at  the  MKT
location as  well as surface water and sediments in  the Little
Schuylkill River.  Residential wells were not evaluated in the risk
assessment since volatile organic compounds detected in these wells
were not found  to be site-related, although background levels of
lead in  the regional  ground water may be of  concern to public
health.

Twenty-two chemicals were  selected as contaminants  of potential
concern at the McAdoo Associates site  including  carcinogenic PAHs,
volatile organic compounds,  and  a limited number of  inorganics that
differed between  media.   Most  of  the  inorganics  present in the
ground water,  surface water,  and  sediment  can be predominantly
attributed to the  acid mine  drainage in the area, and in most cases
were not identified  as site-related contaminants of concern.
                                35

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Exposure Assessment

The    following   current   land-use   exposure   pathways   were
quantitatively evaluated:

• direct  contact with  surface water  and sediments  by children
  playing  in Little Schuylkill River; and

• ingestion  of  fish  caught  from  Little   Schuylkill  River  by
  recreational fisherman.

The following future land-use exposure pathways were quantitatively
evaluated:

• ingestion  of  ground  water  and absorption  and  inhalation  of
  chemicals while showering by hypothetical  residents at the MKT
  location; and

• incidental  ingestion  and  dermal   absorption  by  hypothetical
  construction  workers  exposed  to subsurface  soils at  the MBS
  location.


Exposure point concentrations were estimated for each contaminant
of  potential  concern  and  exposure pathway.    Exposure  point
concentrations and exposure parameters values were combined using
a chemical intake equation  to estimate  exposure  (i.e.,  chronic
daily intake [GDI])  for  the reasonable maximum exposure  (RME) case
for each contaminant of potential concern and pathway.


Human Health Risk

Toxicity  criteria and  GDIs  identified   in  the Risk Assessment
portion of the  1991  focused RI report were  combined to quantify
potential carcinogenic risks and noncarcinogenic hazards associated
with the exposure pathways quantitatively evaluated in the McAdoo
Associates site baseline risk assessment.

Potential carcinogenic risk was quantified by multiplying the GDI
by the slope factor.   Conservative exposure assumptions were used
to estimate  the GDIs in  order that  potential  risk  will  not be
underestimated.  The assumptions  used are discussed in detail in
the 1991 focused RI report.   Chemical-specific cancer risks were
summed in order to quantify the total cancer risk associated with
exposure to all  contaminants  of concern  at  the  site.  Potential
carcinogenic risks were expressed as an  increased probability of
developing cancer over a lifetime (i.e., excess individual lifetime
cancer risk).   For  example, a 10~6 increased cancer risk can be
interpreted as an increased risk of 1 in 1,000,000 for developing
cancer over a lifetime if an individual is exposed to  site-related

                                36

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contaminants.    The  NCP states  that  "for  known  or  suspected
carcinogens, acceptable  levels are generally concentration levels
that represent  an excess upper bound lifetime  cancer  risk to an
individual of between 10"4 and 10~6."

The noncarcinogenic hazard associated with exposure to a chemical
was  quantified  by dividing  the  GDI  by the  chemical-specific
reference dose  (RfD)  (note that the RfD  values used  in the 1991
focused  RI  risk assessment were  obtained from  current  IRIS and
HEAST  data  base updates.)    This ratio is  called  the  hazard
quotient.   If the hazard  quotient exceeds unity  (one),  then an
adverse  health  effect may  occur.   If  the hazard quotient is less
than unity,  then adverse noncarcinogenic hazards are  unlikely to
occur.  The potential hazard from all site-related contaminants was
evaluated by calculating the hazard index, which is the sum of the
chemical-specific hazard quotients.

A summary of the potential carcinogenic risks and noncarcinogenic
hazards  estimated  for   the   exposure  pathways  quantitatively
evaluated in the HcAdoo  Associates site baseline risk assessment
are presented in Tables  9 through 15 and  are summarized below:


• Current risks  to human health related to direct exposure  (i.e.
  children playing in  the Little Schuylkill River) to surface water
  and  sediments are within  the National  Contingency  Plan  (NCP)
  acceptable risk  range  (i.e.  greater than 10~4) for  carcinogens
  (predominantly   polynuclear  aromatic   hydrocarbons   [PAHs]).
  Noncarcinogenic hazard was calculated to be below unity  (Tables
  9  and 10).   Therefore,  both carcinogenic  or noncarcinogenic
  health  effects  associated  with  exposure   to  site-related
  contaminants present in surface water or sediment are unlikely to
  occur.

• There are no current site-related human health risks associated
  with  the  residual  subsurface  soil contamination  at the MBS
  location.  All residual contaminants are located at least  10 to
  12 feet  below  the  subsurface,  and  no current  complete human
  health exposure pathway is identified.

• Current risks  to human health related to ingestion  of fish are
  within the NCP acceptable  risk range  for  carcinogens  (bis(2-
  ethylhexyl)phthalate), and noncarcinogenic hazard is calculated
  to be  below unity (Table  11).   Therefore,  both carcinogenic or
  noncarcinogenic health effects associated with ingestion of fish
  exposed to MKT location-related contaminants present in surface
  water or sediment are unlikely to occur.
                                37

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                                                                               Table 9

                                                      Potential  Carcinogenic  Risk  Associated  with Direct Contact
                                           of Surface Hater by Children Playing  In Little Schuylklll River for the RUE Case
           Chealcal
                RME Chronic
               Dally  Intake
                (•g/kg/day)
   Slope
   Factor
(mg/kg/day)
  Weight-
of-Evldence
 Potential
Cancer Risk
           Organlcs:

             b1s(2-Ethylhexyl)phtha1at*
                    6.8E-5
     1.4E-2
                                                                   B2
                                                                                          l.OE-6
to
oo
         Potential  Noncarclnogenlc Risks Associated with Direct
Contact of Surface Water by Children Playing 1n Little Schuylklll  River
                            for  the  RUE Case
Chemical (a)
Organlcs:
b1s(2-Ethylhexyl)phthalate
Inorganics:
Zinc
RME Chronic
Dally Intake
(^/kg/day)

4.8E-4
6.0E-3
Total
RfD
(ng/kg/day)

2.0E-2
2.0E-1
Hazard Index:
RfD
Uncertainty
Factor

1000
10
Hazard
Quotient

2.4E-2
3.0E-2
2.7E-2
           (a)  Toxlclty criteria were not available  for aluminum and  cobalt;  therefore, hazard quotients were not estimated for these elements.

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                                                                           Table 10
                                               Potential  Carcinogenic Risks Associated with Direct  Contact with
                                          Sediment for Children Playing in  Little SchuylMIl River for the RNE Case
CO
\o
Cheaical
Organlcs:
Benzo(a)pyrene
(Equivalent)
Inorganics (a):
Arsenic

Cheaical (b)
Inorganics: (a)
Arsenic
ChroMlwa
Zinc
Total Hazard Index:
RNE CDI for
Incidental Ingestlon
(.g/kd/day)

1.4E-7

2.4E-6
Potential
Sediments for
RME CDI for
Incidental Ingestlon
(•g/kd/day)

1.7E-5
5.0E-4
7.1E-4
RME CDI for
Dermal Absorption
(•g/kg/day)

1.4E-7

Slope
Factor
(•g/kg/day)1

1.2E+1

1.7E+0
Total Carcinogenic Risk by Route:
Total Carcinogenic Risk for Sediment:
Noncarclnogenlc Risks Associated with Direct
Children Playing In Little Schuylklll River
RME CDI
For Dermal Absorption
(•g/kg/day)


Ueight-
of-
Evidence

B2

A
Potential
Cancer
Risk for
Ingestlon

1.7E-6

4.1E-6
5.8E-6
Potential
Cancer Risk
for Dermal
Absorption

1.7E-6

_ _ _
1.7E-6
7.5E-6
Contact with
for the RME Case
RfD
RfD Uncertainty
(•g/kd/day) Factor

l.OE-3
5.0E-3
2.0E-1

1
500
10
1.2E-1
Hazard Quotient
for Ingestlon

1.7E-2
l.OE-1
3.6E-3

Hazard Quotient
for Dermal
Absorption

"" "*
        b)     'Toxlclty criterfa were not available for b'enzo(a)pyrene (equivalent), cobalt, and lead; therefore,  hazard quotients were not estimated for
               these chemicals.

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                                               Table 11
                    Potential Carcinogenic Risk Associated with Ingestion of Fish
            from Little Schuylkill  River Under Current  Land-Use Conditions for the RME Case
Chemical
Organics:
bis(2-Ethylhexyl)phtha1ate
Chronic
Daily Intake
(mg/kg/day)
1.1E-3
Slope Factor
(mg/kg/day)-'
1.4E-2
Weight of
Evidence
B2
Potential
Cancer Risk
1.5E-5
                   Potential  Noncarcinogenic  Risks  Associated with  Ingestion of Fish
            from Little Schuylkill  River Under Current  Land-Use Conditions for the RME Case
Chemical (a)
Organics:
b1 s (2- Ethy 1 hexy 1 ) ph thai ate

RME Chronic
Daily Intake
(mg/kg/day)

2.5E-3

RfD
(ng/kg/day)

2.0E-2
Total Hazard Index:
RfD
Uncertainty
Factor

1000

Hazard
Quotient

1.3E-1
1.3E-1
(a)      Toxicity criteria were not available for aluminum and cobalt; therefore, hazard quotients were not
        estimated for these elements.
                                                   40-

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• The potential risks from multiple exposure pathways under current
  land-use conditions are within the NCP acceptable risk range for
  carcinogens.   the noncarcinogenic hazard was  calculated  to be
  below unity  (Table  12).

• Future risks to human health related to ingestion of and exposure
  via dermal absorption and inhalation to ground water from the MKT
  location exist (Tables 13 and  14) .   Based on  the  scenario of
  ingestion  of  and  exposure  to  mine  pool ground  water,  the
  potential  carcinogenic risk,  primarily  associated  with  1,  2
  dichloropropane,   is  1   x   10~3,   and   the  hazard   index
  (noncarcinogenic hazard)  is 1.  Therefore, there is potential for
  carcinogenic risk and noncarcinogenic hazard associated with
  future mine pool ground water ingestion and exposure.
  However, it is unlikely that  the mine pool will  ever be used for
  water supply given the low pH of the water as a result of acid
  mine drainage, low expected well yields,  and overall poor natural
  background water quality.

• Future risks  to human  health related to exposure to subsurface
  soil  at the  MBS  location via future  construction  activities
  (construction worker scenario of exposure via dermal absorption
  and  incidental ingestion)  are  within  the NCP  acceptable risk
  range  for  carcinogens  (PAHs),  and  noncarcinogenic hazard is
  calculated to be below unity (Table 15).  Therefore, carcinogenic
  or noncarcinogenic  health effects associated  with  exposure to
  residual contaminants during any future MBS location construction
  activities are unlikely to occur.

ECOLOGICAL RISK

• There are no federal or Commonwealth  of Pennsylvania threatened,
  endangered  species,  or  species  of  concern  observed  in  the
  vicinity of the McAdoo Associates site.

• The aquatic community of  the  Little Schuylkill River is severely
  affected by AMD, indicating high ecological risk. However, given
  the limited amount of MKT location-related contamination in the
  surface water and  sediment, the impact of the MKT location to the
  aquatic community is minimal.

• No  ecological  risk  is  identified  with  respect  to  the  MBS
  location.
                                41

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                                               Table 12

                            Potential  Risks from Multiple Exposure Pathways
                                   under Current Land-Use Conditions
Potential
Carcinogenic Risk
Pathway for the RME Case
Children Playing in Little Schuylkill River:
Ingestion of sediments
Dermal absorption from sediments
Dermal absorption from surface water
Subtotal for Pathway:
Fishing in Little Schuylkill River
Total for all Routes (a):

6E-6
2E-6
1E-6
9E-6
2E-5
3E-5
Hazard Index
for RME Case

0.12
0
0.03
0.15
0.13
0.28
(a)   '   It  should  be  noted  that  these  risk estimates are conservative upper-bound estimates that assume
        that  an individual  is exposed according to the RME  scenario  outlined in this  report  for all
        exposure pathways evaluated; and thus represents the maximum possible risk  under current land-use
        conditions.
                                                   42

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                                                                       Table 13

                                Potential Carcingenic  Risks  Associated with  Ingest ion and Dermal Absorption Exposure of
                                from Use of Ground Water  at  the MKT Location by Hypothetical Residents for the RHE Case
Chemical
 RHE  Chronic
Daily Intake
 (mg/kg/day)
   Slope
   Factor
(mg/kg/dayr
  Ueight-
of-Evidence
 Potential
Cancer Risk
Organics:

  1,1-Dichloroethane
  1,1-Dichloroethene
  1,2-Oichloropropane
     6.0E-4
     1.2E-4
     1.2E-2
     9.1E-2
     6.0E-1
     6.8E-2
     C
     C
     B2
    5.5E-5
    7.2E-5
    6.2E-A
                                                                                                 Total  Carcinogenic Risk:
                                                                            1E-3
                               Potential Noncarcinogenic Risks Associated with Ingest ion and Dermal  Absorption Exposure
                                        from Use of Ground Water at the MKT Location by Hypothetical Residents
                                                                   for the RHE Case
Chemical (a)
 RHE  Chronic
Daily Intake
 (mg/kg/day)
    RfD
 (mg/kg/day)
                                                                                                           RfD
                                                                                                       Uncertainty
                                                                                                          Factor
                            Hazard
                          Quotient
Organ!cs:

  1,1-Dichloroethane
  1,1-Dichloroethene
  1,1,1-Trichloroethane
     1.4E-3
     2.9E-4
     1.0E-2
     1.0E-1
     9.0E-3
     9.0E-2
    1000
    1000
    1000
     1.4E-2
     3.2E-2
     1.1E-1
Inorganics:
  Silver
  Zinc
     2.0E-3
     3.5E-2
     3.0E-3
     2.0E-1
     2
     10
                                                                                    Total  Hazard Index:
     6.7E-1
     1.BE-1
                                                                                                                                 2.7E+0
(a)   Toxicity criteria were not available for aluminum, cobalt and 1,2-dichloropropane.

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                                               Table 14

                 Potential Carcinogenic Risks Associated with the Inhalation of VOCs
                              While Showering for  Hypothetical Residents
                                 at the MKT  Location for the RME Case
Chemical
1,1-Oichloroethane
1,1-Oichloroethene
1 ,2-01 chl oropropane

RME Chronic
Daily intake
(rag/kg/day)
2.3E-4
4.8E-5
4.8E-3

Slope Weight-
Factor of-
(mg/kg/day)"' Evidence
9.1E-2 C
1.2E+0 C
6.8E-2(a) 82
Total Carcinogenic Risk:
Potential
Cancer Risk
2.1E-5
5.8E-5
3.2E-4
4.0E-4
                           Potential Noncarcinogenic Risks Associated with
                     Inhalation of VOCs While Showering for Hypothetical Residents
                                 at the MKT Location for the RME Case
Chemical (b)
1 , 1-01 chl oroethane
1 , 1-01 chl oroethene
1 ,1 , 1-Tri chl oroethane
RME Chronic
Daily Intake
(mg/kg/day)
5.7E-4
1.2E-4
4.8E-3
RfD
mg/kg/day)
l.OE-1
9.0E-3(c)
3.0E-1
RfD
Uncertainty
Factor
1000
1000
1000
Hazard
Quotient
5.7E-3
1.3E-2
1.6E-2
                                                         Total Hazard Index:
                                                                                   3.5E-2
       No inhalation slop* factor (SF)  was available for 1,2-dl chl oropropane for this pathway.   In order
       to calculate risk, the ore! SF was used.
(b)


(e)
No oral or Inhalation RfDs were available for 1,2-di chl oropropane;  therefore, the estimated risk
does not include this cheaical.
No Inhalation RfD was available for 1.1-dichloroethene for this pathway.
risk, the oral RfD wes used.
In order to calculate
                                                   44

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             Table 15

    Potential Carcinogenic Risks
Associated with Direct Contact with
  Subsurface Soils by Hypothetical
       Construction Workers
           MBS Location

Organi cs:
Benzo(a)pyrene (Equivalent)
gamM-BHC
DOT (total)
b1s(2-Ethylhexyl)phthalate
Heptachlor Epoxide
Hethylene Chloride
Exposure
Point
Concentration
(ug/kg)

5.271
44
107
6,500
4.9
470
RME
CDI
(mg/kg/day)

3.1E-8
2.6E-10
6.3E-10
3.8E-8
2.9E-11
Ong/kg/day)"

11.5
1.3
0.34
0.014
9.1
5.6E-9 7.5E-3
Total Carcinogenic Risk:
Potential
Carcinogenic
Risk

3.6E-7
3.4E-10
2.1E-10
5.3E-10
2.6E-10
4.2E-11
4E-7
Potential Noncardnogenlc Hazards
Chemical
Organic* (ug/kg):
Acetone
gamna-BHC
DDT (total)
b1 s (2-Ethyl hexyl ) phthal ate
Heptachlor Epoxide
Methyl ene Chloride
Exposure Point
Concentration

130
44
107
6,500
4.9
470
RME
CDI
(mg/kg/day)

6.0E-7
l.OE-7
2.5E-7
1.5E-5
1.1E-8
2.2E-6
RFD
(mg/kg/day)

1E-1
3E-4
5E-4
2E-2
1.3E-5
6E-2
Hazard
Quotient

6.0E-6
3.3E-4
5.0E-4
7.5E-4
8.5E-4
3.7E-5
PolycvcHc Aromatic Hydrocarbons
Anthracene
Ft ouranthene
F1 ourtne
Napthalene
Pyren«
Xylenes (total)
Inorganics (mo/kg);
Chromium
Copper
Mercury
Z1nc
870
3,100
460
210
2,600
2.400

16
38
0.3
174
2.0E-6
7.1E-6
1.1E-6
4.8E-7
6.0E-6
5.5E-6

2.2E-S
5.3E-S
4.2E-7
2.4E-4
3E-1
4E-3
4E-2
4E-3
3E-2
2E+0

5E-3
1.3E+0
3E-4
2E-1
Hazard Index
6.7E-6
1.8E-3
2.8E-5
1.2E-4
2.0E-4
2.8E-6

4.4E-3
4.1E-5
1.4E-3
1.2E-3
1E-2
                 45

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SELECTED REMEDY

After consideration of the existing and future risks posed to human
health  and  environment,  EPA's  selected remedy  for  the  McAdoo
Associates  site  is  No Further Action,  with monitoring.  Based on
information collected to  date,  the EPA has determined that no
additional  remedial  actions other than those already  implemented
are  required  to  ensure  protection  of  human health  and  the
environment beyond ground-water monitoring.   Monitoring at the MKT
location (which  is already  proposed as part  of  the  1985  ROD) will
be  expanded to  include  all of  the  existing  monitoring  wells.
Samples  from these  wells shall be analyzed  for volatile organic
compounds and nine inorganics.  Three inorganics (cobalt, silver,
and zinc) are included because they were selected as contaminants
of concern  for  ground water during the  RI for  this ROD, and the
other six inorganics  (beryllium, cadmium, chromium, nickel, lead,
and cyanide) were selected in view of  their concentrations detected
in soil samples  collected as part of  the RI  for the 1985 ROD for
this  site.   At  the  MBS  location, four  monitoring  wells will be
installed and long-term ground-water monitoring  will be performed.
Samples from these wells  shall be analyzed for  volatile  and semi-
volatile organic compounds and TAL inorganics.  The duration of
ground-water monitoring at  both locations will  be 30 years.

Although the ground water in the mine pool  is contaminated with 1,
2 dichloropropane,  it does not result  in any additional level of
risk since there is  no complete pathway to affect human health.  If
the mine pool were considered for use as a source of  potable water,
the technical  difficulties associated with  treating this ground
water  would prevent any  such project  from  occurring.   These
difficulties are primarily associated with the treatment that would
be required to make the water potable, namely the large  amount of
lime that would  be required  to adjust the pH of the highly acidic
water, and the treatment that would be required  to reduce the high
concentrations of metals  present.  The  pH adjustment and metals
treatment alone would result in the generation of large amounts of
lime sludge that would need to be disposed of  either in a  municipal
or possibly a hazardous waste disposal facility.  Furthermore, once
the  pre-treatment  is complete,  it  is  likely that additional
treatment for the 1,  2 dichloropropane would be required, as this
compound would probably volatilize during the exothermic reaction
and vigorous mixing  associated  with the  pre-treatment process.
Therefore,   as discussed above, it would be unreasonable  to assume
that  this  water  resource,  which has  been  severely  affected by
natural conditions,  would  ever provide a complete pathway  for human
exposure to necessitate any  remedial action  beyond  the No Further
Action alternative.

The present worth cost of this No Further Action, with Monitoring
remedy is $503,540.   The breakdown of this  cost  is $69,540 for the

                                46

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capital costs (primarily monitoring well installation) and $434,000
for monitoring costs.

Because this remedy will result in hazardous substances remaining
on-site, a  review will be conducted within  five  years after the
commencement of  this remedial action  in  accordance  with Section
121(c) of CERCLA, 42 U.S.C. Section 9621(c), to ensure that human
health and the environment continue to be adequately protected by
the remedy.   It  should be noted that  previous  remedial actions
shall also be reviewed  in the future.

DOCUMENTATION OF SIGNIFICANT CHANGES

The Proposed Plan for the McAdoo Associates site was released for
public comment on July 22,  1991.  The Proposed Plan identified the
no further action, with  monitoring alternative as the EPA preferred
alternative.    EPA  reviewed all  written   and  verbal  comments
submitted during the public comment period.  Based on the review of
these comments,  it  was  determined  that no significant changes to
the preferred alternative, as it was originally identified in the
Proposed Plan (and presented in this ROD), were necessary.
                                47

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                   MCADOO  ASSOCIATES  SITE  OU2
                  ADMINISTRATIVE RECORD FILE *
                       INDEX  OF  DOCUMENTS

 II.  REMEDIAL ENFORCEMENT PLANNING

     1 .   Report:   McAdoo Associates Site, Final Cover System
          100 Percent Design Package, prepared by Roy F.
          Weston,   Inc., 12/7/90.  P. 200001-200160.  A
          transmittal letter is attached.
*    Administrative  Record File  available   7/23/91,  updated
     7/30/91,  updated 9/27/91.

Note:  Information  pertaining to McAdoo OU2 can also be found
in the McAdoo  OU1 Administrative Record  File,  located at the
same site repository and file  as  this record.

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III. REMEDIAL RESPONSE PLANNING

     1.    Report:   Work  Plan,  Volume  I,  (Technical),  Remedial
          Investigation/Feasibility Study,  prepared  by  Tetra
          Tech,  Inc.,  9/90.   P.  300001-300107.

     2.    Memorandum to  Mr.  John S. Mellow,  Pennsylvania
          Department of  Environmental  Resources  (PADER),  from
          Ms.  Kate  Crowley,  PADER,  re:   Comments  on  the work
          plan,  11/8/90.   P.  300108-300108.

     3.    Letter to Mr.  Tad  Yancheski,  Tetra Tech,  Inc.,  from
          Mr.  Eugene Dennis,  U.S.  EPA,  re:   Comments on the
          work plan,  11/14/90.   P.  300109-300112.

     4.    Memorandum to  Mr.  Eugene Dennis,  U.S. EPA,  from Mr.
          Mike Ellickson,  U.S.  EPA, re:   Comments  on the
          project plan,  12/4/90.   P.  300113-300129.

     5.    Letter to Mr.  Eugene  Dennis,  U.S.  EPA,  from Mr.
          Joseph D'Onofrio,  PADER,  re:   Comments  on  the work
          plan,  12/7/90.   P.  300130-300130.

     6.    Letter to Mr.  Ted  [sic]  Yancheski,  Tetra Tech,  Inc.,
          from Mr.  Eugene  Dennis,  U.S.  EPA,  re:   Comments on
          the  work  plan  and  Field Sampling  Plan,  12/12/90.
          P.  300131-300133.

     7.    Letter to Mr.  Eugene  Dennis,  U.S.  EPA,  from Mr.  Tad
          B.  Yancheski,  Tetra Tech, Inc., re:  Revisions  to
          McAdoo Project Plans,  12/17/90.   P.  300134-300174.
          The  amended pages  are  attached.

     8.    Letter to Mr.  Tad  Yancheski,  Tetra Tech,  Inc.,  from
          Mr.  Eugene Dennis,  U.S.  EPA,  re:   Approval of work
          plan,'1/14/91.   P.  300175-300175.

     9.    Report:   Feasibility  Study  Report  for Surface Water,
          Sediment,  Ground-Water,  and  Blaine Street  Elements,
          prepared  by Tetra  Tech,  Inc.,  7/91.  P.  300176-
          300290.

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10.  Report:  Remedial Investigation Report for Surface
     Water,  Sediment,  Ground-Water,  and Elaine Street
     Elements,  prepared by Tetra Tech,  Inc.,  7/91.
     P.  300291-300630.

11.  Report:  Remedial Investigation Report for Surface
     Water,  Sediment,  Ground-Water,  and Blaine Street
     Elements Appendices,  prepared by Tetra Tech,  Inc.,
     7/91.   P.  300631-300899."

12.  Letter  to Mr.  Tad Yancheski,  Tetra Tech,  Inc.,  from
     Mr.  Eugene Dennis,  U.S. EPA,  re:  Comments on the
     Draft  Remedial Investigation Report. 7/18/91.
     P.  300900-300909.

13.  Letter  to Mr.  Tad Yancheski,  Tetra Tech,  Inc.,  From
     Mr.  Eugene Dennis,  U.S. EPA,  re:  Comments on the
     Feasibility Study for McAdoo,  7/18/91.  P. 300910-
     300913.

14.  Letter  to Mr.  Eugene  Dennis,  U.S.  EPA, from Mr. Tad
     B.  Yancheski,  Tetra Tech,  Inc.,  re:   Transmittal of
     revisions to the  RI/FS, 7/22/91.  P. 300914-301086.

15.  U.S.  EPA Proposed Plan, McAdoo Associates Superfund
     Site,  7/22/91.  P.  301087-301097.

16.  Letter  to Mr.  Eugene  Dennis,  U.S.  EPA, from Mr.
     Joseph  D'Onofrio, PADER,  re:   Comments on draft
     proposed plan, 7/17/91.  P. 301098-301099.

17.  Letter  to Mr.  Eugene  Dennis,  U.S.  EPA, from Mr. Tad
     B.  Yancheski,  Tetra Tech,    Inc., re:  Transmittal
     of  Revised Remedial Investigation Study Report,
     Appendix B,- 7/23/91.   P.  301112-301254.   The report
     is  attached.

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V.   COMMUNITY INVOLVEMENT/ CONGRESSIONAL
     CORRESPONDENCE/IMAGERY

     1.    U.S.  EPA Public  Meeting,  McAdoo Superfund  Site,
          8/8/91.   P.  500001-500089.

     2.    Letter  to Ms.  Francesca  DiCosmo,  U.S.  EPA,  from  Mr
          Michael  W.  Ziegler,  re:   Comments to  the proposed
          clean up alternative,  8/9/91.   P.  500090-500090.

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       BIBLIOGRAPHY OF SITE SPECIFIC DOCUMENTS
1.   Settlement and Cover Subsidence of Hazardous Waste
     Landfills:  Project Summary,  prepared by M.  W.L.
     Murphv and M.  P.A.  Gilbert,  5/1/85.
     EPA-600/S2-85-035

2 .   Review of In-place  Treatment  Techniques for
     Contaminated Surface Soils -  Vol.  1:   Technical
     Evaluation,  prepared by OSWER/OERR/ORD/MERL,
     9/19/84.
     EPA/540/2-84-003a

3 .   Final RCRA Comprehensive Ground-Water Monitoring
     Evaluation (CME)  Guidance Document,  prepared by M.
     G.A.  Lucero and OWPE,  12/19/86.
     OSWER #9950.2

4 .   Ground-Water Protection Strategy,  prepared by the
     Office of Ground-Water Protection,  8/1/84.
     EPA/440/6-84-002

5.   RCRA Ground-Water Monitoring  Technical Enforcement
     Guidance  Document,  TEGD:   Executive  Summary,
     prepared  by M.  G.A. Lucero and OWPE,  7/1/87.
     OSWER #9950.1-a

6.   CERCLA Compliance with Other  Laws  Manual - CERCLA
     Compliance with State  Requirements [Quick Reference
     Fact  Sheet],  prepared  by OSWER, 12/1/89.
     OSWER #9234.2-05FS

7.   CERCLA Compliance with Other  Laws  Manual - CERCLA
     Compliance with the CWA and SDWA [Quick Reference
     Fact  Sheet],  prepared  by OSWER, 2/1/90.
     OSWER #9234.2-06FS

8.   CERCLA Compliance with Other  Laws  Manual - Overview
     of ARARs  - Focus  on ARAR Waivers [Quick Reference
     Fact  Sheet],  prepared  by OSWER, 12/1/89.
     OSWER #9234.2-03FS

9.   RCRA  Ground-Water Monitoring  Technical Enforcement
     Guidance  Document  (TEGD),  prepared by EPA, 9/1/86.
     OSWER #9950.1

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