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HARRIMAN PARK iVIRONMENTAL
INVESTIGATION INTERPRETATIVE REPORT
PRELIMINARY ASSESSMENT AND
SITE INSPECTION
SOUTH JJ!7FF RSON COUNTY, COLORADO
TDD R8—841].-13
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HARRIMAtf PARK ENVIRONMENTAL
INVESTIGATION INTERPRETATIVE REPORT
PRELIMINARY ASSESSMENT AND
SITE INSPECTION
SOUTH JEFFERSON COUNTY, COLORADO
TDD R8-8411-13
EPA REGIONAL PROJECT OFFICER: WALTER SANDZA
E&E FIT PROJECT MANAGER: KARL FORD
SUBMITTED TO: KEITH SCHWAB - FIT RPO
JUDY WONG - REM-RPO
DATE SUBMITTED: MARCH 22, 1985
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TA8LE OF CONTENTS
PAGE
1.0 Introduction..... ..
2.0 SiteLocationandHistory........ 3
3.0 Environmental Setting.. . . . . . . . .7
3.1 Site Topography 7
3.2 Regional Geology...... ........ . . . ......•. . . . . . •... 7
3.3 Site Geology ......... ..............8
3.4 Site Hydrology . . . . . ........ . . . . . . . . . .15
3.5 Soi 1 s . . . . . . . . . . . . . . . . . . .18
4.0 Sampling Methodology..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.1 InitIal Reconnaissance Homestead Dump......... ... 21
4.2 Phase I: Multimedia Sampling...........................21
4.3 Phase IA: Investigation of Drum Site.. . 29
4.4 Phase II: ContinuedMultimediaSampling 29
4.5 Phase III: Continued Multimedia Sampling.... 31
5.0 Analytical ResuitsandOiscussion. .......32
5.1 Inorganic Oata............
5.1.1 AnalytIcal Results...............................32
5.1.2 Evaluation of Drinking Water Data. . 32
5.1.3 Evaluation of Surface Water, Sump Water and Dnaii
Water Data . . . . . . . . . . . . . •. . . . . . . .38
5.1.4 Evaluation of Soil, Sediment and Fertilizer Data.42
5.1.5 QualIty Assurance Review of Inorganic Oata.......45
5.2 Organic Data............................................48
5.2.1 Analytical Results...............................48
5.2.2 QualityAssuranceofOrganicData......
5.2.3 Evaluation of WaterData................. 49
5.2.4 EvaluatIon of Soil/SedimentData.................57
5.2.5 Evaluation of Air Data. .58
5.2.6 Discussion of Findings...... . . . . . . . . . . . . . . . . . . . . .60
5.3 Other Investigations. .................62
5.3.1 Drum S lte........................................62
5.3.2 ERRlSSiteDataCompilation......................62
5.3.3 Miscellaneous Investigations..... ........ . . .. .
6.0 Conclusions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
6.1 The Environmental Setting and Public Health.............69
6.2 MajorFindings-InorganlcData......................... 69
6.3 MajorFlndings—OrganicData........................... 7 O
6.4 Other Investigations....................................l].
7,0 References
8.0 Appendices
Appendix A: ERRIS Site Suim ar1es
Appendix B:
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LIST OF TABLES
3.1 Generalized Stratigraphic Column for the Harriman Park Area
5.1 Inorganic Analytical Results of Drinking Water Samples
5.2 Inorganic Analytical Results of Surface Water, Sump Water and
Drum Water Samples
5.3 Inorganic Anal tic Results of Soil and Sediment Samples
5.4 Special Analyses of Aqueous and So11Q Samples for
Ferti ii zer-Rel ated Parameters
5.5 Comparison of Arsenic Concentration in Soils Using Different
Analytical Methods
5.6 Organic Analytical Results for Water Samples
5.7 Organic Analytical Results for Soil and Sediment Samples
5.8 List of Organic Contaminants Monitored at Harriman Park
5.9 Organic Analytical Results for Air Samples (ug/m 3 ) Positively
Identified Compounds
5.1.0 Organic Analytical Results for Air Samples (ug/rn 3 ) Tentatively
Identified Compounds
5.11 Comparison of Pesticide Residues for Colorado and for 11195 W.
Belleview
5.12 Drum Inventory for 11195 W. Belleview
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LIST OF FIGURES
2.1 Site Location Map, Harriman Park
2.2 ERRIS Site Location Map, Jefferson and Douglas Counties
3.1 Generalized Geologic Cross Section
3.2 Generalized Geologic Map of the Harriman Park Area
3.3 Uranium Leases Adjacent to Harriman Park
3.4 Surface Water Drainage of Harriman Park
4.1 Total Number of Analyses by Sample Type
4.2 Drinking Water Sample Location Map
4.3 Underground Seepage Water Sample Location Map
4.4 Surface Water - Sediment Sample Location Map
4.5 Soil Sample Location Map
4.6 Air Sample Location Map
5.1 Harriman Park Wind Rose
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1.0 INTRODUCTION
This report has been prepared to describe the results of the
Region VIII Environmental Protection Agency s environmental investiga-
tion of the Harriman Park — Friendly Hills conitiunity, located in south
Jefferson County, Colorado. This investigation was Initiated by EPA
at the request of local citizens in the coninunity, hereafter referred
to as Harriman Park. EPA undertook this investigation under its
authority under the Comprehensive Environmental Response, Compensation
and Liability Act (Superfund).
The investigation was directed by EPA staff scientists In con-
junction with scientists from the EPA Field Investigation Team, (FIT),
Ecology and Environment, Inc. The objective of the investigation was
to determine the presence (if any) of environmental contaminants in
the study area, with particular emphasis on locating any source(s) of
hazardous wastes. A parallel investigation was conducted by EPA Radi-
ation Programs staff to determine the presence, (if any) of unusual
radioactivity in Harriman Park. This report suninarizes the Superfund
portion of the study.
The field Investigations coninenced on September 7, 1984 and con-
tinued until December 2, 1984. Officials from the Jefferson County
Health Department and the Colorado Department of Health provided
support to various aspects of the study. The field investigations
consisted of a large—scale multimedia monitoring program for hazardous
substances, as well as Investigations of reports of illegal dumping
activities and other miscellaneous complaints.
Due to the large analytical requirements, five laboratories
participated In the analyses of the data, and normal delays were
experienced in receiving the analytical data. In spite of these
delays, the Environmental Protection Agency has expended every
feasible effort to expedite analytical results and scientific
Interpretation of the data.
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The report is organized to include sections on site location and
history, information on the environmental setting of Harriman Park,
the approach to the sampling activities, presentation of the
analytical data and interpretation of the results. Sections are also
provided discussing conclusions from the study and recommendations for
community residents.
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2.0 SITE LOCATION AND HISTORY
Figure 2.1 shows the location of the Harriman Park - Friendly
Hills neighborhood and the boundaries of the i inediate study area.
The neighborhood as identified in the figure contains tout 800 acres
and approximately 8000 residents. These subdivisions are located in
Sections 7 and 8, 155, R69W of unincorporated Jefferson County and
were developed approximately eight years ago. Examination of a 1968
aerial photograph indicates the lands were used for agriculture prior
to development. The neighborhood is located approximately 0.5 miles
east of the foothills of Turkey Creek Canyon of the Front Range of the
Rocky tkuntains.
Locational and historical data for Harriman Park were evaluated
and found to be important background information for the environmental
investigation and for the interpretation of the results. Locational
characteristics include information on area water supplies and
industrial developments. Recent historical data include preliminary
data on health studies conducted by the Colorado Department of Health
(CDH) and environmental studies conducted by the Jefferson County
Health Department (JCHD).
Jefferson County Heal th Department has reported the occurrence of
historic sewer line breaks in the area. Water and sewer services are
provided by Lakehurst Water and Sanitation District and Willo roOk
Water and Sanitation District. JCHD sampling revealed nitrate-
nitrogen (N0 3 -N) concentrations in a few sumps and basements ich
they attributed to past sewer line breaks and/or agricultural
activities.
Drinking water to both districts is provided by the Denver Water
Department, via Lakehurst Water and Sanitation District in the north-
ern portion of the study area and Willo rook Water and Sanitation
District in the southern portion.
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SIT! LOCATION MAP HARRIMAN PARK
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No major industrial developments are located near the site.
Industrial areas are occasionally associated with hazardous waste
activities. The EPA maintains a list of industrial locations known or
suspected to contain hazardous wastes. The list is called the
Emergency and Remedial Response Information System (ERRIS).
Twenty—five such sites are located in either Jefferson or Douglas
Counties. The locations of these 25 ERRIS sites in Jefferson and
Douglas counties have been plotted, and none are located within 5
miles of the area (Figure 2.2). One page summaries containing
information on these 25 sites are contained in Appendix A. Further
information on the potential for these 25 sites to contribute
contaminants to Harriman Park may be found in Sections 5.3 and 6.0.
Beginning in July, 1983, the Jefferson County Health Department
began receiving complaints of nui erous illnesses in the area.
Officials from JCHD requested assistance from the Colorado Department
of Health (COH) to conduct an investigation of health conditions in
the area. At the same time, JCHD began collecting environmental
samples from the area. During the course of this work, reports of
“midnight dunping” were received by JCHO, but no basis for these
allegations were discovered by JCHD.
The preliminary epidemiological (health) investigation conducted
by CDH revealed a childhood cancer incidence rate approaching the
upper end of the statistically expected normal range. More definitive
epidemiological studies are being undertaken by CDH to better
establish health conditions in Harriman Park.
The environmental monitoring conducted by JCHD consisted of lim-
ited sampling of surface waters and groundwater seeps and basement
sumps for coliform bacteria, nitrates, conductivity and limited tests
(2) for volatile organic chemicals in water. A neighborhood gamma
radiation survey was completed by JCHD which failed to reveal evidence
of radiological sources that exceed local background. Evidence of
mining on the hogback one mile immediately west of the area was
investigated in the survey without report of above—background
5
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readings. Further investigation by local environmental health
officials revealed a small, abandoned “homestead” duiip located near
West Bowles and South Alkire which was subsequently investigated by
EPA FIT and is discussed elsewhere in this report.
6
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3.0 ENVIRONMENTAL SETTING
EPA-FIT reviewed published reports and conducted field surveys as
part of the environmental assessment for Harriman Park. A brief
review of the topography, hydrogeology, and soil geology is a
necessary part of environmental contamination studies and is used to
define potential pathways of contaminant migration to and within the
study area. In addition, discussion of site geology sheds light on
the occurrence of uranium deposits west of Harriman Park.
3.1 Site Topography
Ground topography consists of flat to shallow slopes, sloping
less than 5% to the east. The maximum elevation is 5800 feet above
sea level on the western edge of the study area. The topographic low
is 5400 feet above sea level at the eastern edge of Harriman Park.
Local relief of about 450 feet maximum and occurs along the hogback to
the west of the Harriman Park development. Shallow slopes reflect the
outcropping bedrock formations and normal stream and drainage related
erosion east of the hoqback.
3.2 Regional Geology
The geologic setting of the study area is representative of the
foothills of the Colorado Front Range. Three major geologic features
are present in addition to the Rocky Mountains west of the study area:
the hogback of the Dakota Group, the Denver basin, and the Golden
fault.
The Dakota hogback is a sharp—crested ridge consisting of steeply
dipping sedimentary beds that were tilted during the late Cretaceous
Laramide Orogeny. The Denver basin, upon Eiich the study area
resides, is an as mi etrical double—plunging syncline and depositional
basin. The deepest part of the basin lies to the west of the basin
center near the Rocky Mountains. On the western margin of the basin
at the base of the Front Range, beds dip steeply eastward at
approximately 40’.
7
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The third geologic feature in the area is the Golden fault shown
in Figure 3.1. The Golden fault is a northwest - southeast trending
high angle reverse fault. The total i1ount of displacement is not
known, but at its greatest displacement nearly 11,000 feet of
stratigraphic section is missing (Berg, 1962). The fault is inferred
to be present below the alluviun in the study area where it is either
parallel with strike, or grades into a line of squeezed but
undisplaced beds. Well logs from t deep oil test holes in the
extreme northern portion of the study area near Soda Lakes show the
fault as a large anticlinal fold that has a faulted and overturned
limb. The stratigraphic section may repeat up to four times in the
fault zone (Berg, 1962). The Golden fault is a secondary bedrock
controlled fault, not a major structure, significantly affecting
topography and drainage.
3.3 Site Geology
Figure 3.2 shows the generalized surficial geology in the
Harriman Park area. The most abundant surficial units in the Harriman
Park development are alluvii.n and colluviun deposited during the
Quaternary period. The deposits are present as thin sheets,
pediments, and terraces masking the underlying bedrock units. Table
3.1 describes the general characteristics of the Quaternary and alder
rock units present in the Harriman Park area.
The youngest mapped bedrock unit in the study area is the
undifferentiated Tertiary Denver and Cretaceous Arapahoe Formation.
The unit outcrops north of Bowles and west of Kipling streets. An
angular unconformity exists between the Denver-Arapahoe Formation and
the underlying Upper Cretaceous Laratnie Formation. The Lar nle varies
from sandstone to cl ystone within the study area. The marine Fox
Hills Sandstone comformably underlies and is interbedded with the
Laramie Formation. Both units are dipping to the east from 80 to
near vertical and form a long topographic high between Sims and
Kipling streets on the east side of Harriman Park.
8
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The thickest and most abundant subcrop bedrock formation in the
study area is the Cretaceous Pierre Shale. The unit is. about 6200
feet thick, but the Golden Fault may reduce the apparent formation
thickness in the northern portion of the study area. The Pierre
overlies the Cretaceous Niobrara Formation in the western part of
Harriman Park. The more erosionally resistant limestone in the
Niobrara forms a low ridge parallel to the large Dakota hogback. The
Benton Formation underlies the Niobrara and outcrops in liriiited areas
to the west of the Niobrara ridge. Both the Niobrara and Benton
Formation dip approximately 40° to the east. The Benton was deposited
conformably on the Cretaceous Dakota Formation that forms the large
hogback in the western portion of the study area. An erosionally
resistant quartz sandstone forms the dipsiope of the hogback dipping
40 to 45° to the east.
Formations of Jurassic and older ages unconformably underlie the
Dakota and only outcrop on the west side of the hogback. The Jurassic
rocks consist of Morrison and Ralston Creek formations and the
Permian-Triassic units consist of the Lykins and Lyons formations.
The presence of old uranium mines adjacent to Harriman Park has
caused some concern among the area residents. Docunenteduraniun
production has taken place in the outcropping of the Dakota Sandstone
in the hogback region to the northwest of the Study area. The mines
are presently inactive. Other minor occurrences of radioactive
elements are known to exist in the hogback sediment to the north of
the study area. The next nearest production of uranium occurred more
than four miles northwest of the study area near the town of Idledale
in a different drainage system. This deposit is also a different
mineralogical environment than the Dakota deposit.
EPA Region VIII has conducted a radiological investigation of ‘the
Harriman Park — Friendly Hills area. The report includes research and
field verification of the known suspected uranium mining areas in the
study area. Figure 3.3shows the locations of the known uranium
leases adjacent to Harriman Park. The ore deposits are influenced by
11
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TABLE 3.1
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URANIUM LEASES ADJACENT
To HARRIMAN PARK
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a fault striking N40W and dipping 30 to 55 southwest. The fault is
a dam to mineralization (Nelson-Moore, 1978) and stops the movement of
uranium down dip in the direction of the Harriman Park community.
A site visit conducted on November 19, 1984 by EPA-FIT, confirmed
the presence of the mine workings as well as the strike slip fault
cutting off the ore deposit (Grossman, 1957). The ultimate source for
the uranium in this area was probably the Precambrian rock to the west
of Harriman Park. Uranium occurs in mineral deposits in these rocks
as uraninite and its microcrystalline form, pitchblende. The
Precambrian rocks contain naturally high concentrations of uranium.
In weathered rock, pitchblende and uraninite are converted to oxidized
uranium minerals, one of which is carnotite. Because the oxidized
uraniun minerals are somewhat more soluble, uranium can be leached out
and carried by either surface water or ground water from the original
deposit. When reducing conditions are encountered, the uranium will
reprecipitate as pitchblende or coffinite (USIO 4 x nH 2 O).
Reducing conditions may occur in marshy environments for surface water
or in rock formations that contain pyrite and/or carbonaceous material
(in this case, the Dakota Sandstone). A geochemical barrier is formed
where the host rock environment changes from oxidizing to reducing
conditions. At that transition zone, uranium precipitates and forms a
“roll—front” deposit comonly five to twenty—five feet wide. Other
coninonly precipitated elements may include mol denum, selenium, and
vanadium.
The geology of the area minimizes the potential for uranium in
the Dakota Sandstone to be brought into direct contact with residents
in the study area. Figure 3.2 shows that the Dakota is overlain by
shaley and clayey sediments that would restrict the ground water flow
across bedding planes and upwards toward Harriman Park. In addition,
the Dakota has been dragged down to a depth of over 9,000 feet by
movement along the Golden Fault. This is evidenced by deep oil well
tests on the north boundary of the study area (Berg, 1962). Barring
any other large—scale faulting acting as a mineral solution conduit,
the uraniun associated with the Dakota appears to be well isolated
14
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from the near surface ground water and sediments underlying the
Harriman Park development.
Due to the amount of carbonaceous material found in the rock,
minor tar seeps are also characteristic of the Dakota Formation. Past
production of tar has taken place along the hogback west of Harrrimafl
Park. The extent of the excavation and size of the seep indicate past
production was very limited and other economic or significant tar
seeps are not known to exist near the study area.
Uraniun is also found in the Laramie Formation sediments located
approximately 13 miles north of Harriman Park at the Old Leyden Mine.
The mineralization is carnotite in a thin vertical coal seam. The
Laramie Formation outcrops in the eastern portion of Harriman Park,
but no.known radioactive occurrences exist in that part of the study
area (Grossman, 1957). Uraniun deposits exist to the west of the
study area in the Precambrian rocks as vein and pegmatite
mineralization. As mentioned above, those geologic environments are
not close to Harriman Park.
3.4 Hydrology
From a hydrologic standpoint, three distinct water systems are of
interest: the surface water system, the shallow alluvial aquifer
system, and the bedrock aquifer system.
3.4.1 Surface Water
The surface water in the study area is the Turkey — Bear Creek
and South Platte River drainage basins, the only perennial streams in
the area. There are numerous intermittent streams and ditches (Figure
3.4) that flow during times of high runoff and precipitation. The
original drainage pattern of the study area is within the confines of
Turkey Creek. The Bergen ditch system was constructed for
agricultural purposes which altered the natural drainage pattern in
the southern portion of the study area (Figure 3.4). Surface water
15
-------
* r Avg
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-------
flows are partially diverted by the ditch system into the South Platte
River to the east of Harriman Park.
Weaver Gulch/Creek originates in the foothills to the southwest
and flows northeasterly through Harriman Park. It is partially diver-
ted into Bergen Ditch through the Willo brook subdivision and golf
course. The diversion flows into Bergen Reservoirs #1 and #2 and then
easterly through Harriman Park along both Belleview and Bowles
Avenues.
The reservoirs in the area are used for irrigation storage and
flood control. According to local health officials, a locally high
water table, probably influenced by these ditches, may be causing
seepage into basements, residential yards, and basement sumps.
Harriman Lake is located in the northeast part of the study area
and is owned by the Denver Water Board. Surface water runoff to the
lake is limited to a relatively small area by surrounding natural
topographic drainage divides and man-made diversions. The hydraulic
relationship of the lake to the ground water system is unknown.
3.4.2 Ground Water
Ground water in the area is present in both the surficial
material and bedrock units. Recharge of the aquifers occurs by
precipitation, infiltration, reservoir release and leakage, and
surface water infiltration.
The shallow alluvial aquifer is primarily comprised of sand and
gravel in stream channels and gulches. Permeabilities (the rate of
ground water movement) of alluvial materials are generally higher than
the primary permeability of bedrock aquifers. A few shallow wells
exist in the study area but no wells are known to be using the
alluvium as a source of drinking water.
17
-------
Ground water perched over impermeable clay materials occur in
many parts of the study area, and it is probably the cause of locally
high water tables and basement flooding. Due to its limited lateral
extent anu lack of consistent ground water yield, perched water has
not been developed as a source for any domestic water supplies.
Water bearing bedrock units (the Dakota and the Hygiene member of
the Pierre Shale) may exist in the study area at 8,000 and 6,000 feet
respectively, below ground surface. No known wells use the bedrock
ground water system at such depths as a source of potable water. A
record search of water wells from the Colorado State Engineer’s Office
indicate that for the Harriman Park area, Sections 7 and 8, only 4
wells are permitted: two are located near the hogback, possibly
completed in the Dakota, and two alluvial wells are permitted in the
southeast corner of Section 8. One alluvial well yielded no water.
All drinking water is provided by the Denver Water Board, via
Lakehurst and Willowbrook Water Districts.
3.5 Soils
Soils are a potential pathway for migration or concentration of
environmental contamination. The sal) parent material, composition,
texture, permeability, and thickness must be considered when assessing
environmental problems.
The Harriman Park area soils were mapped and studied in detail by
the U.S. Department of Agriculture Soil Conservation Service
(USOA-SCS) in cooperation with the Colorado Agricultural Experiment
Station and Jefferson County during 1980. Prior to the development of
Harriman Park as a residential area, the land was used primarily for
irrigated and non—Irrigated agriculture and pasture. Agricultural
processes can have significant effects upon some soil characteristics,
Including trace element concentrations.
The natural soils within the study area generally have loamy
textures with local variations of clay and sand content. Soils
18
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developed on sandstone outcrops tend to be more stony and gravelly
than the clayey barns developed on the other bedrock outcrops. The
parent materials of the soils also determine other soil
characteristics such as the calcareous and bentonitic (expansive)
properties commonly found in Harriman Park.
The permeabilities of the soils vary considerably from specific
site to site. The soil associations generally exhibit slow
permeability (0.06 to 0.2 inches per hour) in more clayey units and
moderately rapid permeability (2.0 to 6.0 inches per hour) in soils
developed from bedrock with less shale and mudstone content. The
soils are deep and well drained, except where they are developing on
competent bedrock.
Artificial fill primarily associated with highway and dam
construction is also found in the Harriman Park area. The fill is
usually compacted at optimum moisture and maximum density to achieve a
suitable base for heavy traffic, or low permeability for water
impoundments.
1.9
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4.0 SAMPLING METHODOLOGY
This section summarizes the sampling strategy employed in the
Harriman Park environmental investigation. It must be noted at the
outset that a biased sampling strategy was employed which means that
samples were taken in locations with the highest probablility of
contamination. While random study design provides the best
statistically sound data, the sheer number of samples required for an
area such as Harriman Park, and the high cost per sample precluded
this approach.
The Harriman Park screening study concentrated efforts and
resources on areas most likely to show contamination, if any existed.
Studies of this kind are no less scientific since they serve to
identify problems for further study, if required. In addition,
samples were collected at the residences of certain families that have
suffered unusual health problems, and at other residences where a
specific complaint had been received. This is consistent with the
study approach in looking for problems as part of the screening
study.
Locations most suitable for accumulation of contaminants include
drainages —- especially the streams and irrigation ditches that
traverse Harriman Park. Soluble contaminants will leach and travel
with surface runoff, while insoluble contaminants and heavy metals
tend to sorb onto soil particulates high in organic matter or clay
minerals. Particulates tend to also be transported to drainages by
surface runoff and accumulate as sediment. Hence, by examining
surface water and sediment in the drainages of Harriman Park,
contaminants from upstream areas should accumulate there and be
identified. Any contaminants originating from soils or paved areas
would discharge Into the storm sewer system and be conveyed into
Weaver Gulch within the study area.
20
-------
Total No. of Analysos by Matrix
Sump Water (888)
Drinking Water (671)
Air (212)
Soil (2203)
HARR1 AN PARK
Surface Water (1068)
Sediment (1533)
_____ _____ 11
P LD 4VESTK1AT1ONS cw UNcONTHOLLED
HAZARDOUS V STE SIUS
T*s aSPOUTTS TNS I.P.A.
scology and lonmeni, FIG. 4.1
•sav.a. COLOS*SO
-------
The total scope of the investigation involved the collection of
41 inorganic and 64 organic samples, involving approximately 6575
separate analyses. These were split among drinking water, surface
water, sump water, sediment, soil, and air samples, Figure 4.1. The
investigation evolved in various phases, each of which is described
below.
4.1 Initial Reconnaissance: Homestead Dump
An area along Bergen ditch north of W. Bowles and from Alkire to
Simms was reported by JCHD to contain solid wastes. Although this
site was not located within what was to become the study area, an
effort was made to mobilize a sampling team on September 7, concurrent
with the EPA decision to conduct an environmental investigation of
Harriman Park.
This dump area included a four acre borrow pit near Alkire and W.
Bowles and the gulch, which is a part of the Bergen ditch system.
Sampling locations are illustrated in Figures 4.4 and 4.5. Surface
water and sediment samples were collected along the gulch in two
places. One soil sample was collected near the junction of the borrow
pit and gulch beneath a sealed drun. One additional sample was taken
from a snail drum. A magnetometer survey was conducted of the debris
pile along the north side of the gulch to determine if buried drums
were present. None were detected.
4.2 Phase I: Multimedia Investigation
The second sampling activity was designed to do multimedia
sampling within the Harriman Park study area. Of high priority in
this phase was the sampling of Weaver Gulch, Bergen ditch, the
elementary schools and residences with specific complaints about the
possible presence of contaminants. The team conducted Phase I
sampling from September 24, through October 5, 1984.
22
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Six drinking water samples were collected from residences, three
from Willo brook Water District (DW—i, DW-4, DW-6) and three from
Lakehurst Water District (DW—2, OW—3, DW—5). Figure 4.2 displays the
sampling locations. A comparison sample was taken from the Denver
Federal Center (DW—7). All samples are supplied from the same Denver
water supply. All samples were analyzed for 40 volatile organics,
while OW—i and 0W-2 were analyzed for the suite of substances called
the “hazardous substance list’ 1 (HASL) including 130 organics and 24
inorganics.
Four underground seepage water samples were also collected for
HASL analyses, three of which were basement siinp waters (GW—2, GW-3,
GW—4) and one from outdoor seepage from Bergen ditch (GW—1), Figure
4.3. These samples were collected to evaluate whether contaminants
were present.
Five surface water samples were taken, two from Weaver Gulch
(SW-i and SW—2), one at the Bergen Reservoir #2 outlet (SW—3), one
from Bergen ditch in Harriman Park (SW—4), and one from the Harriman
Lake west shore (SW-6). Figure 4.4 displays these sampling locations.
In addition, eight sediment samples were collected, five from Weaver
Gulch (SE-i, SE-2, SE-5, SE-6, SE-7), two from Bergen ditch (SE-3,
SE—4), and one at Harriman Lake (SE—8). All samples were subjected to
IIASL analyses. From Figure 4.4, it may be seen that some of the
sediment sampling stations coincide with surface water stations.
Four composite surficial soil samples were taken from a two meter
square grid, at the 0—5 cm depth. Sampling stations included
playground sand at Kendalivue and Pfeiffer Elementary Schools (SO-i
and S0—2, respectively). A background sample of undisturbed soil was
collected near W. Bowles and Simms (S0—3), and duplicate soil samples
were taken near the substation at W. Marlow and Eldridge (S0-4 and
SO-5). The soil sampling stations are shown in Figure 4.5. The SO—4
and SO—5 samples appeared to be in an area receiving some sheet runoff
from the substation. No evidence of spills was observed at any of the
locations. All samples were subject to HASL analyses.
23
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4.3 Phase IA: Investigation of Drum Site
During the course of the Phase I investigation, the EPA—FIT team
identified a residence at 11195 W. Belleview with 62 drums stored in
an unsafe manner. The site was discovered on September 24, 1984 and
the drums appeared to have numerous warning labels on them, visible
from W. Belleview.
On October 2, 1984, EPA—FIT received permission from the property
owner to conduct a site inspection. The sampling team inspected the
site, conducted a drum inventory and collected three drum samples, and
four soil samples. The results of this investigation are reported in
Section 5.3, although the soil data are reported in Section 5.2.
To determine if contamination had occurred from the drum storage
area, one drinking water sample was collected from the underground
water storage tank located near West Belleview and Sinins (DW—PDC)
Figure 4.3. The storage tank is adjacent to the illegal drum storage
area located during the Phase IA investigation. The tank, owned by
the Denver Water Department and constructed in 1980, supplies drinking
water to much of Harriman Park. This sample was analyzed for the
hazardous substance list contaminants.
4.4 Phase II: Continued Multimedia Sampling
As preliminary laboratory results became available, additional
drinking water, simip water, soil samples, and air monitoring was
intiated during Phase I. In addition, residences of certain families
with unusual health problems were also sampled. These activities were
conducted from October 22 to October 27, 1984.
Four sunp water samples were collected from local residences:
(GW—X), (GW—WC), and (GW-VC), and (GW—Y), see Figure 4.4 for loca-
tions. The first three samples listed above were analyzed for ni-
trate, phosphate and uranium. These analytes were selected to try to
determine whether law,, fertilizer was infiltrating the sump waters.
29
-------
The remaining sump sample (GW—Y) was taken from a backyard sump riot
previously sampled and was analyzed for HASL contaminants.
Eight soil samples and one sediment sample (Bergen Reservoir)
were collected. Three soil samples (SO-X, S0—WC and SO.-VC) corres-
ponded to residences with sumps which were sampled and described
above. These samples were to be analyzed for heavy metals, nitrate,
phosphate and uranium. The remaining soil samples (SO-Cl, SO-WW,
SO-K, SO-Y, and SE—BR) were analyzed for HASL. contaminants. Refer to
Figure 4.5 for sample locations. All soil samples were composites of
surface soil (0-5 cm) from a 2 meter square grid, except SO-K which
was sampled at 16 inches depth in a berm northwest of the Kendailvue
School building.
One fertilizer sample (F—i) was collected from a residence with a
sump. This sample was analyzed for phosphate, nitrate, heavy metals,
and uranium.
Three neighborhood air sampling locations (A—2, A-3, A—4) were
selected for characterization of ambient levels of organic compounds,
and a comparison air sample (A—i) was collected at the Jefferson
County Health Department Building. The locations are shown on Figure
4.6.
All stations consisted of four devices using the distributed
vol unes Tenax cartridge procedure recorm ended by EPA (Research
Triangle Park). These samples trains were calibrated before and after
each run using a Buck Calibrator (a primary flow standard). Total
approximate sample volumes sampled at each station included 12 liters,
24 liters, 48 lIters, and 96 liters.
Also during the Phase II field activities, EPA-FIT investigated
various complaints of reported dumping and residential chemical odors.
The results of these Investigations are discussed in Section 5.3. No
new sources of hazardous wastes were identified.
-------
4.5 Phase III: Continued Multimedia Sampling
Field activities in this phase took place between November 29
through December 5, 1984. Due to analytical difficulties encountered
with the initial air sampling, these activities involved a repeat of
the initial air sampling (Section 5.2.2). Using similar methodology,
four new samples were taken from the same locations as before, Figure
4.6.
An additional set of sump water samples was collected for the EPA
radiation study. These samples were collected outside of the study
area in an effort to gain more information on the occurrence of
uranium in basement sunp waters. These results are discussed in more
detail in the companion EPA radiation survey report. Two additional
complaints were investigated pertaining to sunp odors at one residence
and unexplained thermal hot spots at another. Nothing unusual was
discovered at either home.
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5.0 ANALYTICAL RESULTS AND DISCUSSION
This chapter discusses results from sampling activities. The
data are divided into inorganic results in Section 5.1 and organic
results in Section 5.2. A quality assurance review of the data is
provided in their respective sections. Section 5.3 discusses the
results of other field investigations at Harriman Park.
5.1 Inorganic Data
5.1.1 Analytical Results
Samples of drinking water, surface water, sunp water, soils,
sediments and fertilizer were collected. Table 5.1 presents the
inorganic data from three drinking water sources. These data will be
discussed in Subsection 5.1.2 by comparing their concentrations with
the National Interim Primary and Secondary Drinking Water Criteria
(EPA, 1976a).
Table 5.2 contains data from surface water and sump water
samples. The sample of water from the drum found on Bergen ditch is
included in this table. Table 5.3 provides data from analyses of soil
and sediment samples. A sample of fertilizer is included In this
table. Finally, Table 5.4 presents the data from analyses of several
different types of media for ortho-phosphate, nitrate plus nitrite and
uranium, together with gross alpha radiation.
5.1.2 Evaluation of Drinking Water Data
The EPA National Interim Primary and Secondary Drinking Water
Criteria appear in Table 5.1 for comparison with the drinking water
results. The health criteria used were the drinking water standards
(USEPA, 1976a), regulated by the Safe Drinking Water Act, and drinking
-------
TABLE 5.1. INORGANIC ANALYTICAL RESULTS OF DRINKING WATER (DW) SAMPLES.
(ANALYSES PERFORMED BY ROCKY MOUNTAIN ANALYTICAL LABORATORY UNLESS OTHERWISE NOTED.)
IJnits are ugh.
SAMPLE NO. OW—i DW—2 DW-PDC 1 CRITERIA!
DATE 9/25/84 9/25/84 10/23/84 STANDARDS
Aluminum [ 131] [ 103] 77 5000(c)
Antimony 51 51u lOOu 146(b)
Arsenic 3u 3u 50u 50(a)
Barium [ 36] [ 35] 35 1000(a)
Beryllium O.6u O.6u lOu 0.037(b)
Boron MR NR 14 -—
Cadmium 5u 5u 5u 10(a)
Calcium 29,000 32,000 MR --
Chromium 4u 4u Su 50(a)
Cobalt 6u 6u 5u ——
Copper 57 [ 1] 24 1000(b)
Iron lOu lOu 47 300(d)
Lead [ 3.3] [ 2.6] 30u 50(a)
Magnesium 8170 8170 NR -—
Manganese [ 4.4] 4u 8 50(d)
Mercury O. lu O.lu O. lu 2.0(a)
Nickel 7u 7u 30u 13.4(b)
Potassium [ 2350) [ 2350] MR — —
Selenium 2u 2u 50u 50(a)
Silver Su Su 5u 50(a)
Sodium 25,200 27,200 MR - —
Thallium lOu iOu lOOu 13(b)
Tin 28u 28u NR -—
Vanadium 5u Su lOu ——
Zinc 10 3u 14 5000(b)
1 = Analyses performed by EPA Region VIII Analytical Laboratory.
[ ] Values are near detection limit; therefore error associated with the value is
greater than other reported values.
u = Value of detection limit, indicating the sample is below detection.
R = Analysis not run.
a = USEPA, 1976a.
b = USEPA, 1980.
c = Safe Drinking Water Committee, 1982.
d = USEPA, 1976b; based on aesthetics.
-------
Tab ). 5.0. l. ai1c 04iIyticiI kisItu .1 Iwtaca lit. l301 Su Nit 414). fr at. I I ) lmlas.
*6el) p f by ky 14iMaie 6.I 4kal Li).rat.ry lau it rvla . tid
.
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275000 *00 431 (1403 (113 114 40* 303 14500 *0100 1013 3304 330. 03 304
10914 1014 lIe I I SI. 31. lIe 11. SIp 1 ( 2e SI. 5104 Ilk IOOii *00.
310 504 3. 3. 3. 3. 3. 1. ItS) *14 3. 3. 24 5k 50.
-4 . 4 1 4 ES Ill 1711 (143 (543 1303 (12) 12. 107 (II I) 113) 120. 1214 1*0 30
*004 *04 o .k O.k O .k 0.0. O .k O .k (1.03 1.14 LOs Os 1 . *0. *14
300 2(3 OS 14 14 14 14 00 14 14 II 14 Ii 401 2k
325 5. 14 5 . 5. 3. 5. 14 5. *0. 5. 50. 5k 14 1 .
14 14 51000 40400 4*300 43000 25000 (4931 *1000 143000 *33000 *14000 333000 14 II
374 3. Os 4. 4. 4. 4 . (4.11 43 ( I I) Is 140 414 5. 5.
cebaIl 2* 2 5 . Os I. 0. Os 4. Os (UI *31 4. 10. 114 14 5.
Ce.,. 7)0 5. 1113 III) ( 34) £1.13 1*33 *203 43 (2 51 tI l l 514 50. I 41
153040 430 400 340 (311 200 302 3% 37300 *1040 1293 141 hOe *11 *14
laid 1400 2k (2.01 Os 6(2.11(2.11 14 03 14 14 50. 50. 30. 2k
14 14 HIS *3400 20100 WOO 1000 330. *10000312000311040 125000 110000 14 14
*3000 404 30 30 (I II 30 40 14.1) 444 *14 4 . ( M l 414 5. 100
iwy 0.14. 0.06. L I. Oh L* O.ls II. 0.1. 0*3 0.11 IJO 0.33 tI . tIe 14
. IL*il 1*4 10 1. 1. 7. 1. 14 71 1291 1*51 is ( II) 10. 10 10.
ps *gu 1 14 14 0414 (3101 120*0) 420001 (4300) 1200 10300 11330 121101 * 20004 *20014 14 IS
..Ies Iia IS 514 (1*) ao an i. 14.01 2 . 14 14 IDe 2000 2000 5k 5k
stIv 30. 3. 5. 5. 14 14 S e 3. 5. hIs 5. 30. 50. S e 5 .
scdI s 14 14 0S *1010 2*400 21100 21200 (14303 71400 014000 140000 23*0000 0OC0 II IS
tOalIti . *000. *014 lOs 10. *00. lOs 10. Os 10 . 114 (lOs 10. ICe 1 *00.
t ie 14 14 20. 1331 I I I) (203 20. 13*3 10 31. 20. 422 200. 14 14
vas .d* *50 II I Se Se 14 5 . 3. 34 30 (231 5. 5k 5k 10. 114
c i . 4230 5. ii aai (1.01 £0.11 143 *40 44 10.2.1 314 10 II 1 5
I kalyss. favd by I I I l. Iae VIII 6a*y*k1 La4er .I y.
(1 • Value s Mad ) .. llaI$p tMsIor. wvsr aiicc*a).d silk lbs
vi i i. Is ,‘.Mar lb.. .4 ruperl.d vote...
I .Vi* 1MM liMe.
• • l ls i.1
* Interferences by very high iron concentrations may affect analyses of arsenic,
antimony, cadmium, tin, selenium and manganese using Inductively coupled argon
plasma.
-------
TABLE 5.3. INORGANIC ANALYTICAL RESULTS OF SOIL (SO & SS) SEDIMENT (SE & SED) AND FERTILIZER (F) SAMPLES
(ANALYSES PERFORMED BY ROCKY MOUNTAIN ANALYTICAL LABORATORY UNLESS OTHERWISE NOTED.)
Units are ug/g dry weight unless otherwise noted.
1 5 Is
SAMPLE NO. SS-1’ SO-i SO-2 50-3 50-4 SO-S SO- 114 SO-C SO-K SO-Cl SO-4 SO-WC’ SO-VC’ SO-K ’ F-WC ’
DATE SAMPlED 9/7/84 9/24/84 9/24/84 9/24/84 9/24/84 9/24/84 10/23/84 10/23/84 10/23/84 10/23/84 10/24/84 10/24/84 10/24/84 10/24/84 LU/24/84
Aluminum 6550 1000 1300 12,500 8800 7670 6880 9510 5600 6300 11.400 17,850 28,200 25.450 1240
Antimony 9.6u 26u 26u 27u 26u 26u O.2u 0.2u O.2u 0.2u O.2u 15u 15u 15u l Su
Arsenic 37.1 1.Su 1.5u 10 7.1 7.1 4.6 7.4 3 4.6 9.2 93 160 137 15
Barium 172 [ 16:1 24 119 130 138 99 152 70 105 199 129 247 133 2
Beryllium Lu 0.3u (O.4u] [ 0.87] (0.75] (0.86] 0.24 0.28 0.24 O.05u 0.3 2u 1 1 2u
Boron lu M i Ill Ill M l HR HR HR HR HR NH 20 37 37 20
Ca&aita 7.8 2.Su 2.5u 2.6u 2.5u 2.7 1.2 1.5 0.92 1.1 2.0 9 11 9 15
Calcium HR [ 606) 609 6580 46,200 44,800 Nfl HR HR HR HR Ml HR Ml 141
‘ - Chromium 12 2u 2.5 19 12 11 9.2 14 10 11 14 21 31 24 61
Cobalt 6.1 3u 3.1 [ 10] [ 6.6] [ 5.6] 5.1 6.8 5.2 5.7 9.1 7 10 8 lu
Copper 19.3 (3.4] 4.8 18.0 18 20 9.1 14 9.9 9.8 20 16 22 17 1
Iron 17,600 2740 4430 23,500 16,900 17,100 10,500 16,000 9670 13,600 19,900 18,600 23.250 11,350 649
Lead 20.4 [ 2.2] 3.3 30 26 27 16 16 7.6 12 23 127 38 38 5u
Magnesium Mi 13161 (530] 3420 3700 3800 NH 141 M l MR HR 141 NH HR HR
Manganese 192 49 477 265 251 303 218 237 260 149 405 252 352 204 11
Mercury 0.73 O.05u 0.05u 0.OSu O.05u 0.05u 0.05u 0.05u O.05u 0.05u 0.14 HR NH HR HR
Nickel 19.3 3.5u 3.5u [ 20] (16] [ 16] 11 15 8.4 11 21 13 21 17 16
Potassium HR 600u [ 132] 4390 3520 3740 NH NH M l MR N H Ml HR Nil NH
Selenium Mi Lu lu Lu Lu Lu Lu Lu Lu Lu Lu HR NH MR HR
Silver 0.5u 2.5u 2.5u 2.6u (3.2] 2.5u 0.15u O.15u O.15u O.15u O.lSu Lu lu lu Lu
Sodium Mi [ 1360] [ 1200] [ 658] (1270] [ 977] HR 1* MR 1 4 1 NH NH MR HR . HR
Thallium 9.6u 3u 3u 3.iu 3u 3u HR NH HR NH NH HR NH HR NH
Tin Mi 14u (15] t4u 14u 14u 2.2 2.0 1.5u 2.5 3.0 HR HR MR HR
Vanadium 33.6 2.5u [ 4.8] 40 36 33 16 2t 15 14 27 49 79 56 106
Zinc 68.8 (8.9) 15 59 106 109 46 58 35 51 84 43 43 43 168
1 Analyses performed by EPA Region VIII Analytical L oratory. Units are ug/g wet weight.
[ ] Values are near detection limit; therefore error associated with the value is greater than other reported values.
u Value of detection limit.
HR Analysis not run.
* Interferences by very high iron concentrations may affect analyses of arsenic, antimony, cadmium, tin, seleniua and manganese using Inductively
coupled argon plasma.
-------
TABLE 5.3 C0$T.
*
SAMPLE NO. 5 (0-i ‘ 5(0-2 ‘ SE-i S [ -2 SE-3 SE-4 SE-S 51-6 SE-i SE-B SE-BR
DATE SAMPLED 917/84 9/7/84 9/24/84 9/24/84 9/25/84 9/24/84 9/26/84 9/24/84 9/26/84 9/25/84. 10/23/84
A luiint 3870 3750 1780 4560 15,500 20,500 7220 3470 9300 4200 5990
Anti.ony 4.8u 8.6u 26u 41u 59u 40u 32 36u 55u 36u 0.24
Arsenic 21.3 31.2 1. Su 2.4u 16 22 4.2 2.Lu 6 2u 3.6
Bariija 97.4 47.5 [ 251 (83) 241 186 [ 72] [ 47] [ 89] [ 60] 180
BeryI litii O.5u O.9u (0.40) (0.71] [ 1.21 (1.1] [ 0.56] 0.4u [ 0.74] 0.4u 0. O Su
Boron 0. Su O.9u 1 19 HR HR HR HR HR HR HR HR
Cadiat a 5.1 3.1 2.5u 4u 5.7u 3.8u 3.1u 3.5u 5.3u 3.4u 5.5
Calcitia HR 119 [ 791] [ 2840] 50,200 17,700 5300 3750 23,600 9320 HR
Chromlia 6.5 6.2 (4.4] 8.7 25 31 12 8.3 16 [ 5.5] 13
CobalL 3.2 2.6 3u [ 4.9) [ 10] [ 13] [ 5.4] [ 5.0] [ 6.6) 4.1u 6.2
Copper 11.6 7.6 (12] [ 13] 41 26 (15] [ 14] [ 211 [ 60) 12
Iron 11,400 7420 5570 13,800 27,300 31,500 12,500 9170 16,300 6170 12,700
Lead 18.3 17.3 7 7.3 36 17 30 31 57 8.2 24
Magneshii HR HR (755] (2640) 8400 6880 (2740) [ 2220] [ 4340) [ 1220] HR
Manganese 230 148 165 421 277 33? 142 79 115 282 447
Mercury 0.24 0.2 0.05u 0.081 0.18 0.084 0.06u 0.07u O.lLu 0.Oiu 0.O Su
Ihckel 10 6.7 3.5u [ 7.6) [ 36] [ 25] [ 10] [ 8.5) [ 13) 4.8u 24
Potgssiijs HR HR (885] [ 2620] [ 5250) 5720 [ 2920] [ 1750] (3490] [ 1200] 149
Se lenhn 119 119 Lu 1.6u 7.5 1.5u 1.2u i.4u 2.Lu 1.4u Lu
Silver O.2u 0.4u 2. Su 4u 5.lu (4.6] 3. lu 3.5u 5.3u 3.4u 0.i5u
Sodlus HR HR [ 534P 571u (1580] (17201 (742] 500u (1030] [ 549] HR
Thallita 4.8u 8.6u 3u 4.8 6.8u 4.6u 3.8u 4.2u 6.4u 4. lu HR
Tin HR 119 14u 22u 32u 22u 18u 19u 30u 19u 1. Su
Vanadius 19.8 14.5 (6.6] 13 100 68 [ 22] (17] [ 28] [ 12] 22
Zinc 60.1 83.4 14 57 143 83 41 44 121 22 68
‘ Interferences by very high iron concentrations may affect analyses of arsenic, antimony. cadmium, tin, seleniu. and manganese using
Inductively coupled argon plasma.
-------
TABLE 5.3 CONTINUED
NORMAL RANGES OF ELEMENTAL CONCENTRATIONS
IN SOILS OF THE WESTERN UNITED STATES*.
ALL MEASUREMENTS ARE IN ppm (mg/kg).
NORMAL RANGE
ELEMENT MEAN** MEAN ±1 s.d .
Aluminum 58,000 29,000 — 116,000
Antimony 0.47 0.22 — 1.01
Arsenic 5.5 2.8 — 10.9
Barium 580 337 — 998
Beryllium 0.68 0.30 — 1.56
Cadmium 0.2 0.1 — 0.5
Chromium 41 19 — 90
Cobalt 7.1. 3.6 — 14.0
Copper 21 10 — 43
Iron 21,000 10,800 — 41,000
Lead 17 9—31
Manganese 380 192 — 752
Mercury 0.05 0.02 — 0.11
Nickel 15 7 — 32
Selenium 0.23 0.09 — 0.56
Silver 0.2 0.1 — 0.5
Thallium 0.2 0.1 — 0.4
Tin 0.9 0.4 — 1.9
Vanadium 70 36 — 136
Zinc 55 31 — 98
Molybdenum 0.85 0.39 — 1.85
Thorium 9.1 6.1 — 13.6
Uranium 2.5 1.7 — 3.6
Yttrium 22 13 — 37
* Data From: Shacklette, H.T., and Boerngen, J.G.; 1984: Element
Concentrations in Soils and other Surficial Materials of the
Co terminous United States. U.S. Geol. Surv. Professional Paper
1270. lO5pp.
* Means and Standard Deviations are Geometric to account for log—
normal distributions.
-------
Table L4. Special Analyse. of Aqueous and Solid Saiple. for Fertilizar- a1ated Paraastari.
(Analyses perforued by £P ’4 Raqicn V II ! Laboratory.)
Data U238
(uqI l )
tC3-N02 0- bcs i at.
( /l) ( /l)
Date U238 ‘oss
(u /q) AlØua
( i1 )
t 3- 0- oaphats
(a / ) (ii/ )
I • Dwplicate sa de
a a Value of detactiou hut.
1* • Analysis not rue
2 Samples collected outside of study area
Sa li Type
A1 a
( l11)
Aqueous
i-1
druiinq water
9-25-84
1.6
Ni
0.11
0.01w
Sa le
OU-2
‘th iin Mater
9-25-84
1.3
tm
0.14
0.01w
I-3
drinliln water
10-0144
2.1
Ni
Ni
Ni
]I—4
drii*in water
10-01—84
1.8
Ni
Ni
Ni
OII-
drlnltinq water
10-0144
2.0
Ni
Ni
Ni
ai-
‘l *ing isater
10-01-44
1.9
tm
tm
-7
drinking sitar
10-0144
0.8
Ni
t i
ti
me- c
‘Ii*inq sitar
10-23-44
1.3
Ni
Ni
Ni
‘inkinq water
10-23—44
1.4
I i
Ni
I i
3 1
sirfac water
9-24-64
2.0
Ni
0.1w
0.773
r-2
sw’face water
9- -04
0.1
Ni
0.1w
0.016
9 -3
s rface water
9-25-44
1.1
2
0.1w
0.010
S&-4
sarfeca water
9-24-84
1.1
Ni
0.1w
0.013
94-6
su’f water
9-25-84
1.3
Ni
0.1w
0.018
1.-i
waterblank
0.1w
Ni
0.1w
0.01w
6 1 1-1
swap water
9-2644
30
30
0.37
0.981
94-2
e witar
9-25-84
495
270
Li
0.234
94-3
su water
9-26-44
80
40
12.3
0.01w
GIl-4A
sw wata
9-2644
111
Ni
89.3
O.O
611-48
supewat.rdup4A
9-26-84
173
198
83.3
0.049
2611-4
e swater
10-24-84
66
Ni
Ni
Ni
294-42
.uepwstardup4
10-29-84
98
Ni
Ni
Ni
SII-(C
swap water
10-24-84
63
44
31.8
0.036
•
6 1 1-I
s water
10-24-84
130
242
4.3
0.01w
811-C
supe water
10-24-84
44
0.023
0.01w
Solid
Sa*d.
Type
SO-C
soil
10-24-84
1.9
17
14
0.34
SO-C
soil
10-24-84
1.8
17
0.043
0.43
SD-h
soil
10-24-84
2.0
17
0.01w
0.41
F-iC
fertilizer
10-24-84
11.0
I
19.2
12.1
37
-------
water criteria (Safe Drinking Water Committee, 1983; USEPA, 1976b,
1980). There is an important distinction between a standard and a
criterion. Standards are legally enforceable, ile criteria are
recorrinended levels. Many elements, such as calcium, magnesium and
sodium, do not have national criteria.
The comparison indicates that no parameters exceeded their
criteria in the three drinking water samples that received total
analysis.
Nine drinking water samples were analyzed for uranium (Table
5.4). The concentrations ranged from 0.8 to 2.1 ug/l with an average
of 1.6 ugh. The drinking water criteria recomended by the Safe
Drinking Water Corrmnittee of the National Academy of Sciences is 35
ugh (1983).
5.1.3 Evaluation of Surface Water, Sump Water and Drum Water Data
Eight surface water samples were analyzed for major cations and
trace metals. Analyses are reported as total concentrations, meaning
that both dissolved and suspended concentrations were measured. As
Table 5.2 indicates, most heavy metals are observed to be near or
below detection limits. Other major catioris such as calcium,
potassium and sodium may appear to be present at high concentrations,
however these major cations are non—toxic and are within the normal
range. Most trace metal concentrations, with the exceptions of iron,
manganese and zinc, are reported to be below analytical detection
limits.
Some minor changes of surface water quality parameters are noted
as streams flow through the area. A background sample (SW—2) was
collected from Weaver Gulch, near the stables at the Willo rook Golf
Course. This sample Is upstream of the Harriman Park division. Most
comparisons in water quality of surface waters will be made to this
sample. The water at SW—2 is good, with moderately low concentrations
of major cations.
-------
Water is diverted from Weaver Gulch to Bergen Reservoir west of
the Dakota hogback (See Figure 3.4). One branch of Bergen ditcn flows
into the Bergen reservoirs and exits the dam on the north shore of
Bergen Reservoir No. 2. A sample (SW—3) collected from the outlet
showed a decrease in concentrations of iron, manganese, and zinc with
no changes in other trace metal concentration. Further downstream at
SW-4, concentrations of iron, manganese and aluminun had increased
slightly.
A second branch of Bergen ditch turns south after cutting through
the hogback and then heads east approximately paralleling West Bowles
Avenue. When EPA-FIT sampled this branch (Initial Reconnaissance),
there was no flow being released from Weaver Gulch to the branch. The
water sampled apparently resulted from ground water discharge into the
ditch. Flow at I-SW—i was very low, and a considerable amount of
sediment was brought up with the sample. An analysis for total
constituents, dissolved and suspended, was performed. It is the
sediment that contributes to the high concentrations of some trace
metals that are observed in I-SW—i.
A second sample (I-SW—2) was collected further downstream on this
branch below the waste dunping area. Flow was estimated at one gallon
per minute. The sediment load in this sample was greatly diminished,
and the analyses show a significant decrease of all parameters. This
surface water has water quality similar to samples collected in the
northern part of the study area, although manganese is present at a
greater concentration. The analysis indicates that no contaminants
are present in the stream after it passes through the dumping area
when compared with concentrations in the other stream samples.
T additional surface •water samples were collected in the north-
ern section of Harriman Park. Sample SW—i was from a ditch receiving
storm drainage prior to entry into Weaver Gulch. This sample con-
tained the highest concentrations of aluminum and iron of all surface
waters sampled except I-SW—i which was discussed above. Calcium,
potassium and sodium were all present in greater concentrations than
-------
the background sample. Manganese and zinc were similar to backgrouna.
No other trace metals were present in detectable concentrations. The
higher concentrations in SW—i may be due to the fact that this ditch
drains a developed area. Sample SW-6 was collected from the west
shore of Harriman Lake. This lake does not receive direct flow from
Weaver Gulch. Because the sample was collected near the surface and
near shore, the water app ared to contain visible amounts of algae,
and may be somewhat different in content than water from the center of
the lake. Concentrations in this sample are not significantly
different from the other stream sample concentrations.
Five samples of sump water were collected from basements in the
site area. Two of these samples (GW-4A and GW—4B) were duplicates.
These samples contained visible suspended solids. The sump samples
were not filtered, and analyses were performed as totals. Due to the
large amount of visible suspended solids, the samples are likely to
contain higher values of trace el nents. The data are presented in
Table 5.2. Approximately one month after these samples were
collected, three more siiiip samples (GW-VC, GW-X, GW-WC) were taken at
the same locations and were analyzed for uranium, ortho—phosphate,
nitrate plus nitrite and gross alpha activity. Those results are
presented in Table 5.4. One additional sump sample (GW—Y) was
collected from a new location at this time and analyzed for the same
suite of parameters as the first five samples, but not uranium,
nitrate plus nitrite, ortho—phosphate, and gross alpha.
Because suiip water does not fit into any category for v iich
health standards or criteria have been reconinended, evaluation of suup
water quality to any criteria Is not appropriate. Sump water is not
technically ground water because the water has been in contact with
the house foundation and exposed to the atmosphere and debris or liq-
uids in the basement that could enter the sunp. Therefore, comparison
with background ground water quality is also not applicable. Because
stsnp water is not routinely Ingested, application of drinking water
standards could be misconstrued in terms of health impacts. But
drinking water standards may provide a yardstick for measuring water
1
-------
quality, if applied with the understanding that exceeding the standard
does not mean there is a health hazard because the water is not being
cons ned on a regular or long—term basis.
Using this approach, it appears that some parameters (e.g
nitrates) in one or more of the suups are greater than the
concentrations generally considered safe for routine constauption.
However, given the worst case situation of a ung child ingesting
large quantities of suiip water (e.g. one liter in a single or
infrequent episode), it is the opinion of EPA—FIT toxicologists that
no adverse health effects would result from such an exposure.
None of the parameters analyzed in sample GW-Y were greater than
the criteria. Uranitin concentrations were found to be greater than
the criterion (35 ugh) in all other samples but GW—1. Only GW—4 had
nitrate/nitrite, chromiuTi, and seleniwi in concentrations greater than
their criteria (10 mg/l, 50 ugh and 10 ugh, respectively). Other
parameters with concentrations greater than the criteria were
manganese, alwiinun and iron in GW—1 and GW—2. These three metals may
also have been associated with the sediment in these samples.
The sump analyses that appear in Table 5.4 were the resampling of
three sumps. The pairs of samples are GW—2 and GW—X, GW-3 and GW—WC,
and GW-4A/4B and GW-VC. Using Table 5.4, a comparison between the two
sampling periods can be made. Concentrations of nitrate/nitrite,
organo—phosphate and uranium 238 decreased In each sump. The reason
for this decrease may be attributed to dilution. The first sampling
took place on September 24, 1984, and the second sampling occurred on
October 24, 1984. In the interim the Denver area received a heavy
snowfall, with accimiul ations of 18 inches in some areas of Harriman
Park. The snowfall was followed by a warming period. Melt water
percol ated into the ground and moved into sumps. The rapid
introduction of fresher water could lead to short-term dilutions of
ground water concentrations and sump waters.
41
-------
A water sample (D#1) was also collected from a drum found along
Bergen ditch near West Bowles Avenue. The analysis of the sample
provided in Table 5.2, shows very low concentrations of all inorganic
parameters. Only zinc, copper, manganese and barium were detected,
but their concentrations do not indicate the presence of any inorganic
wastes.
5.1.4 Evaluation of Soil, Sediment and Fertilizer Data
Thirteen soils and nine stream sediment samples were collected
for analyses. Soils were collected from yards, and sediments were
collected from ditches at the same locations that surface water
samples were taken. Analyses were performed on nitric acid digestates
of the soils. Soils and sediment concentrations appear in Table 5.3
and are reported on a dry weight basis, except SO—WC, SO—VC, S0—X,
SS-1, SED—1 and SED—2 which are reported on a wet weight basis. To
prepare samples for a dry weight determination, the samples are dried
in an oven to remove the moisture. When samples are analyzed on a wet
weight or field condition basis, the percent moisture affects the
reported concentrations so that concentrations of soils on a dry
weight basis cannot be compared to them. For example, a soil which
has a moisture content of 50 percent and a concentration of 200 mg/kg
manganese (wet weight) will have a concentration of 400 mg/kg when the
sample is dried. Since most references for soil concentrations report
values as dry weight basis, concentrations are not converted to wet
weight concentrations. The reported wet weight soils cannot be
converted to dry weight because percent moistures were not avail le.
Soil and sediment samples are difficult to evaluate on the basis
of whether the material contains too much of any inorganic chemical.
There are no standards or criteria in the United States with which
analyses may be compared. The concentrations of elements in soils and
sediments are affected by many factors: the mineralogical compositon
of the source rock, the pH of the soil or sediment, whether the
environment of the deposition is oxidizing or reducing, the quantity
of clay in the soil, the amount of rainfall, whether the soil is
-------
permeable and allows water to readily infiltrate, the chemistry of
water in streams and in contact with the soil, to name several. In
addition to these natural factors, chemical compositions may be
influenced by the activity of man. Application of fertilizers and
pesticides, breaking up or compacting the earth for building, and
particulate fallout from urban industrial activities are some ways in
which soil chemistries can be altered.
There are several ways of evaluating the impact to soils and
sediments of an area. If the area has not been developed, samples can
be collected prior to development. If the location of the
contaminating source is known, then samples can be collected from an
area that is geologically and climatologically similar but known to be
outside of the impact of the source. Comparative data may also be
used from published reports and references.
In the case of this investigation, a background soil sample
(SO—3) was collected from a fallow field approximately 1 1/4 miles
south of Belleview. The concentrations in this soil can be compared
to other soil concentrations (dry—weight basis only). Very few trace
metal concentrations in the soils from the site area exceeded the ob-
served concentrations in the background soil. When greater concentra-
tions were observed, the values were within twenty percent of the
background soil concentration which is good agreement for soils anal-
yses. Many metals could not be detected in any soil. These metals
were antimony, mercury, selenium, and silver. Other metals with con-
centrations near their detection limits were beryllium and thallium.
In the case of cadmium, the concentration in SO-3 was below detection
(2.6 mg/kg) while several soils had concentrations above this value.
This situation makes the evaluation of cadmium difficult.
Although the United States does not have recommended criteria for
metal concentrations In soils, the United Kingdom (U.K.) Department of
Environment has recommended acceptable concentrations for arsenic,
lead, cadmium, selenium, mercury, chromium and boron (Smith, 1981).
The Department has stated that these recommendations are applicable to
-------
urban schools, playgrounds, recreational areas, and around residential
areas, where there may be regular contact by small children. These
recorrmendations are as follows:
Arsenic - As 20 mg/kg Mercury - Hg 1.5 mg/kg
Lead - Pb 550 mg/kg Chromium - Cr 600 mg/kg
Cadmium - Cd 5 mg/kg Boron - B 3 mg/kg
Selenium - Se 3 mg/kg
Concentrations are expressed on a dry weight basis for samples
prepared by acid extraction samples. Comparison with these values
indicates that there are no cases where trace metals concentrations
exceed the U.K. recomendations, except for those expressed as wet
weight basis. Furthermore, unpublished U.S. Geological Survey
(personal communication, U.S.G.S.) indicate that Harriman Park soil
trace elements vary within the expected limits for the Front Range.
An additional basis for comparison of the inorganic constituents of
Harriman Park soils is provided in Table 5—3 where the normal ranges
for these constituents are reported for the western United States.
The background sediment sample, (SE-2) was collected upgradient
in Weaver Gulch west of the Dakota hogback. Several metals are found
at higher concentrations in downstream sediments. These metals are
aluminum, arsenic, lead, and to some extent chromium and zinc. In
only two cases do concentrations slightly exceed the reconuiendations -
selenium In SE-3 (Bergen Reservoir #2) and arsenic in SE—4 (ditch
leading into Weaver Gulch).
Sediment lead concentrations appear to be higher in the developed
areas than upstream in SE-i and SE-2 where the concentration is about
7 mg/kg. The concentrations appear to increase to the east with con-
centrations in SE—4 through SE—7 at levels two to eight times greater
than background. The highest lead concentration was found in SE-7,
collected from Weaver Gulch where it is crossed by West Quincy Avenue.
This distribution suggests that there is a relationship between occur-
rence of lead and development. Although certainly not conclusive by
these data, sediment lead concentrations could be related to automo-
bile emissions. However, no lead concentrations even approach the UK
reconuiendation of 550 mg/kg.
44
-------
A sample of fertilizer (F—WC) was also sampled during the
investigation. Phosphate fertilizers often have trace metals such as
uranium, arsenic and cadmium associated with them. The analysis
indicated concentrations of 11 mg/kg uranium, 15 mg/kg arsenic and 15
mg/kg cadmium. Other trace metals such as chromium, vanadium, nickel
and thallium were identified in the fertilizer, and with the exception
of uranium, these metals, due to their low solubilities are likely to
be bound to the soil rather than leached through. In oxidizing
conditions, as in an aerated lawn which receives sprinkled water,
uranium is more likely to be in solution and move into the ground
water.
5.1.5 Quality Assurance Review of Inorganic Data
T i laboratories were used in the analyses of inorganic parame-
ters. Both laboratories have internal checks for quality assurance
that include checks on calibration criteria, matrix spike recoveries,
percent differences of duplicates, interference checks and blank re-
sults. The laboratories use EPA approved methods in analytical deter-
minations, however, method sensitivities may vary between laborator-
ies. Data met the applied QA criteria before being used in this
report.
In reviewing soils data, EPA—FIT noted that one set of data had
arsenic values that appeared to be higher than expected. Corrinunica-
tion with the laboratory indicated that the method of analysis was
sometimes subject to interferences by very high concentrations of iron
which could affect the analysis of arsenic, as well as antimony,
selenium, tin, cadmium and manganese. Such interferences can occur in
soils and sediments which are mostly comprised of silica, iron and
manganese and in waters containing suspended inorganic material. The
interference can cause the measurement to be greater than the actual
value.
A reanalysis was requested of both laboratories for six soils in
question (SO—C, SO-4, SO-WW, SO-Cl, SE-BR and SO-K). The laboratories
applied more sensitive techniques of analyses that either avoided or
-------
TABLE 5.5: COMPARISON OF ARSENIC CONCENTRATION IN SOILS USING
DIFFERENT ANALYTICAL METHODS
(concentrations in mg/kg —wet weight basis)
ICP/Hydride Graphite
ICP Method Method Furnace
SO-Y 57.9 6.4 6.5
SO-K 31.2 2.3 2.7
So-cl 65.6 5.8 2.5
SO-C 63.3 4.9 6.0
SO-WW 61.9 6.1 3.7
SO-BR 27.8 3.9 2.1
I. ’ .
-------
diminished the interference. The reanalyzed arsenic results are shown
in Table 5.5 in comparison to the first set of results. There is very
good agreement between the t sets of reanalyzed data.
In preparation of this report, the arsenic data from the first
set of analytical data are provided in Appendix B for review. To
maintain consistency in reporting, only data from the more sensitive
reanalyzed set are used in the interpretation. These are the data
that appear in Table 5.3.
For checks on field procedures, a blank and duplicate were
collected. The blank (BL-1) was collected with the surface water
samples by pouring metals free water into the sampling bucket that was
used to collect the samples. Since some inorganics appeared in the
blank that re otherwise not detected in any other samples, it
appears that the water used to prepare the blank was slightly
contaminated. Hence, this finding does not affect the quality of the
total body of inorganic results.
One set of duplicate analyses was collected. Samples GW—4A and
GW-4B came from a basement siinp. Large percent deviations are noted
for several parameters, notably calcium, arsenic, chromium and lead.
However, as previously noted, these unfiltered samples contained
considerable suspended matter which could affect the reproducibility
of results by increasing sample heterogeneity.
47
-------
5.2 Organic Data
5.2.1 Analytical Results
Table 5.6 provides the organic data results from the aqueous
sampling conducted under all phases. Table 5.7 provides the organic
data tabulations from soil and sediment samples collected during all
phases. Table 5.8 provides a complete list of organic substances
monitored in water, soil and sediment samples at Harriman Park.
Tables 5.9 and 5.10 provide the organic data tabulations from the air
sampling conducted under Phase III. In each case, only those
compounds detected are reported; however, the number of parameters
analyzed are also reported in the tables. In general, a full suite of
parameters Included 130 analytes; however, volatiles and PCB’s were
not analyzed in approximately one—third of the soil samples. For
certain drinking water samples (DW—3 through DW-7), only volatile
organics (40 parameters) were analyzed. In addition to these
analyses, the laboratories are required to report tentatively
Identified compounds, should they appear in the sample. Sampling
locations may be found in Figures 4.2 through 4.5.
5.2.2. Quality Assurance of Organic Data
The organic analyses f or aqueous and soil/sediment samples were
conducted by three separate laboratories. Each laboratory submitted
quality assurance specifications which were reviewed by the FIT
Quality Assurance Officer. As a whole, all of the data were of good
quality, and were accepted as suitable for Interpretation.
The organic data from the initial air monitoring were rejected
due to extensive laboratory contamination. While these data are of no
use whatsoever, as a matter of record, it should be noted that EPA-FIT
-------
compared these tentative data to similar air monitoring data for
Denver (Singh, 1983) and found levels reported for Harriman Park to be
generally lower than levels reported for Denver. In addition, the
concentrations of contaminants observed were lower than occupational
health standards for workers by 1,000-10,000 times.
The data from the repeat organic air monitoring were received and
subjected to a quality assurance review. The field blank was not
excessively contaminated with these samples. Some disagreement
between the duplicate results A—9 anc A-10 was observed with certain
compounds being undetected in one or the other duplicate. However,
the compounds common to both duplicates were generally detected within
a factor of two, indicating adequate precision for the method.
5.2.3 Evaluation of Water Data
Drinking water sample concentrations were compared to water qual-
ity standards and criteria. No exceedances were found (Table 5.6).
Similar suitable standards are not available for surface waters
and sump waters. It is recognized that some persons may be tempted to
compare surface water and sump water data with the drinking water
standards and criteria; however, this is of dubious value since these
waters are not routinely Ingested. In order to properly apply
drinking water standards and criteria to surface water or sump water,
Individuals would have to be ingesting these waters as their total
water intake for their entire lifetime. Even young children without
parental supervision are not likely to ingest these waters on a
regular basis.
Even if this technically inappropriate comparison is made, no
exceedances of health criteria are observed.
Table 5.6 displays the contaminants identified and their observed
concentrations. As may be seen, only chloroform and bromodichioro—
methane appeared with any frequency in drinking water; however, the
-------
TABLE 5.6 ORGANIC ANALYTICAL RESULTS FOR WATER SAMPLES (ugh or ppb)
fM-i IM-2 fM-3 IM-4
1*4-5 1*4-6 1*4-7 OW-PDC GI4-Y 6 14-i 614-2 614-3 GW-4A 614-46
Malyres
chloroform
ch lorod ibroi.ethine
hroumd Ich loromethane
2-butanone
1.3,2 o azaborolIdine --
1,1 bicyclohezyl —-
1,2 benzenedlcarboxylic
acid --
di -N-butylphthal ate 1 SJ
2-pentanone --
pyrefle - -
bi s2ethylhexylphthal ate- -
benzo(k)f luoranthene - -
methyl benzene --
toluene 3.)
aethylene chloride - -
3.9
130 130 130 130 130
—— 11 —— —- --
- - - - 6.) - - --
-- -- 2.) - - --
130
25.0
9.0
130
24.0
6.0
40
18.7
1.1
6.7
40
22.4
7.2
40
21.2
6.6
40
16.5
5.6
IJU
5.0
2.5
130
J Indicates tentatively Identified
-- Not Detected
-- -- - - - - - - -. -- - - - - 4J
-- -- - - -- .- -- - - - - -- -- 14J 14.)
compound and concentration
NcYFE: For the entire list of parameters analyzed, see Table 5.8.
-------
TABLE 5.0 OI1GAIIIC NIALYTICAL RESULTS FOR WATER SAIIPIES CONT. (ug/kg or pith)
SW-i SW-2 SW-3 SW-4 SW-6 HEAlTH CRITERIA 1-SW-i 1-SW-2
Analytes 130 130 130 130 122 122
chloroform -. - - - - -- 100. Oa -. - -
ch lorodibromethafle -- - - - - - - 100 • 0 a -- - -
bro.odichlorO.ethalbe -- - - - - - - 100.01 - -
2-butanone - - -- - - - - AG criteria -- --
1,3,2 oxazaborolidlne -- -- - - - - no criteria —- --
1,1 blcyclohexyl - - - - - - -- no criteria -. --
1,2 beozenedicarboxyl Ic
acid -- -- - - -- - - no criteri --
di-N-butylphtha late -- -- -- -- •- 34,000.0 --
2-pentanone 120.) - - -- - - -- no criteria --
pyrene - - 9.) -- •- o.o?ab --
bis2ethy ihexy lPhthalate - - ii . ) -- - - - - 15 ,000.0°
benzo(k)ftuoranthefle -- 25.) - - -- - - --
methyl benzene - - 98J -- - - - - no criteria --
toluene -- - - - - -- 14 • 300 • 0 b 15
ethylene chloride - - -- - - -- -- 150 . 0 c 3
J Indicates tentatively Identified compound and concentration
- - Not Detected
a EPA National Interim Primary Drinking Water Regulations.
b EPA A lent Water Quality Criteria, 1980.
c EPA Health Anvisory, undated.
NOTE: For the entire list of parameters analyzed, see Table 5.8.
-------
TAULI 5.7 ORGANIC ANALYTICAL RESULTS FOR SOIL *110 SEDIMENT SAMPLES (uglkg or ppb)
SO 1 5021
(Did not do volatlles (40) or PC8’s (8)
S0-3 S0-4 SO-b S0-6 SO-i 50-8 50-9 S0-XW1 SO-XW2 SE-BR SO-K
— 82 analytes
S0-C2 SO4NJ
Analytes
methylene chloride
beazene
b2EH phthalate
dn0ctyl phihalate
BIN:
dBIIC
heptachlor
endosulfan 1
die ldr in
4.4 , 00E
4,4,000
endosulfan sulfate
4.4 DOT
acetone
gasohne constituents
toluene
4 ,methy l phenol
di -N-butyl phthalate
Not Detected
‘Ju
6.5
2.1
73
1600
3.4
1.2
2.8
13.7
16.8
3.7
149.3
18.8
3.7
1 Sample matrix not anal)zed by iMoratory due to unacceptable particle size (pea gravel).
82 82 82 82
130
130
111
110
110
liii
110
--
--
•-
--
--
73
8.3
--
—-
--
--
--
1.8
1.6
—-
—-
--
--
--
400
133
--
--
--
480
--
3200
1200
—-
--
--
--
--
.6
13.5
——
——
-—
——
--
.2
—-
--
--
--
--
--
36.9
--
--
--
--
--
--
3.6
1.1
--
--
--
--
--
5.3
--
--
--
--
--
--
3.1
1.2
--
--
--
--
--
3.2
--
--
--
--
--
--
123.9
4.8
--
--
•-
--
--
18.7
--
- -
- -
--
391
--
--
--
130
4.7
2.1
2.0
2.9
29.2
5.5
45.7
82 82
-- >i io6
NOTE: For the entire list of parameters analyzed, see Table 5.8.
-------
TA6LE 5.? ORGAIIIC MALYTICAL R SILTS FOR SOIL Nil) S(D1&NT SAI4PttS COIn. (ug/ky or b)
SO-C SO-V 5(4 ST-2 SE-3 Sf-4 SE-S
SE-6 SE-7 SE-b SS-1 1-SU -t 1-SUl-2 0-1
Mu lytes &
.ethyiene chloride --
benzene --
b2EH phthalate --
dnOctyl pht.haIite --
bIC - -
dBI( --
heptachioc --
endosuIfan 1 --
dieidrin --
4 4 IiO ( --
4,4,000 --
endosulfan sullate --
4.4001
acetone --
gasoline constituents --
toluene --
4,nethyl phenol --
d$-h-butyl phthalate --
ez iju 130 130 flU 130 flU 130 130 122 -
4
—— —— —— —— —— It —— — — —— ——
-- 163 -- -- 400 ::
122 — 122 122
12 25 --
6 - - --
990 -. -
NOTE: For the entire list of parameters analyzed, see Table 5.8.
-------
TABLE 5.8
LIST .0_F ORGAN iC. CONTAMINANTS MONITORED
AT HARRIMAN PARK
VOLATILES PESTICIDES SEMI—VOLATILES
_______________ a b ZI,’ - oic 1s
_________________________ dl.I*U __________________________ ________
________________________ cf l dai. 2.. dd ophuns4
ca,b i es icMor d. -OOT Z dId Io nsi
diIorob ng,ns $,V-COE 2imethy Pi
I.2-d dU.re,th.vus $,P.000 N.nivo,odsm
U. $- icI lorwMai, ___________ _________________ _________
________________ 1 2 .tcol
________________ us , bi. ( 2.4tIlyG ZYO phthaiat’
*,122-’sdilor..tKaai . ___________ _________________ bu zyI but7 p ith*L t
dd.r ttwis i$d.I 7 d. — ____ dt.n-buiyl p ith*iit*
2-cP t ..thyMnyI , _________________ _________________________ d1-n- ey4 p ithi ate
_____________________ h t dar 2 -4v W I M1 dI.thyt Dhth&I**S
t,Z-dicl%Mrssth.ns .5HC dI,,I d Y* phlMlatq
________________ a Z$,w j .M
________________ 3 mru Isthens
_______________ 1’ I4C QI.41M) bs *idkw lim’.nthsw
c s.i,d1d .ns 3-12$2 bii (kflhiwthsn.
____________ PC5.I2 * d ry IS
m.th Isi dWor ds Z22I _______________ __________
___________________ •1’
ksmsmsU ais _________________ 2—d l.r.rr uP.aI.”.
aLd 1I .
_ b,.a .d d Ioromsthi, . PC8.IOI
__________________ ______________ d b a .h rni
dd sdW sthars
dd odibrsmem.than. _ L -dbidrse.Iu.ru . —
,.ea&I ..the s __________________________
______________ b. %*yI aic l
r.stMns _____________
v v yt • , dibe ia1i.f $0
_____________________ Im he
_________________ bis dorouo r ,I)
e bondisiafids bis ( 2.d%loio,thoipb IiwIh w
S..iitr.& ili’is
f iWthyI.Z .9sntIiions
W . V . —. —
,_ ICtftte
t$$1 tyt.iiqs
—
-------
TABLE 5.9 ORGANIC ANALYTICAL RESULTS FOR AIR SAMPLES (ug/m 3 )
POSITIVELY IDENTIFIED COMPOUNDS
HARRDIAN PARK JCHD
A-6 A-i A-9 A-1O RANGE A-8 NIOSH* ACGIH* SINGH
,butanone 32.8 24.2 24.2-32.8 0.6 590,000 590,000 NR
,1,1—trichlorethane 1.4 0.1 1.7 0.1 0.1-1.7 0.1 1,900,000 1,900,000 4.0
r lchioroethylene 0.4 0.2 0.2 0.2 0.2-0.4 0.3 540,000 270,000 1.4
enzene 0.7 0.2 0.2-0.7 0.4 30,000 30,000 13.4
oluene 30.6 20.3 17.1 24.5 17.1-30.6 18.6 750,000 375,000 22.2
thy benzene 3.5 1.2 26 2.1 1.2-3.5 1.4 435,000 435,000 8.5
y enes 22.2 6.6 21.1 11.5 6.6-22.2 8.2 435,000 435,000 16.8
ethylene chloride 0.2 0.1 0.1-0.2 1,750,000 350,000 3.3
tyrene 1.1 3.1 1.1-3.1 430,000 215,000 NR
cetone 0.1 2,400,000 1,750,000 NR
hlorobenzene 350,000 350,000 NR
otal volatlIes 91.6 29.4 66.9 41.7 29.4-91.6 29.6
8 hour time-weighted average
-------
TABLE 5.10 ORGANIC ANALYTICAL RESULTS FOR AIR SAMPLES (ug/m 3 )
TENTATIVELY IDENTIFIED COMPOUNDS
HARRIMAN PARK JCHD ACGIH
A-6 A-7 A-9 A-1O RANGE A-8 TLV
MethylcycIohexane l 13.6 30.2 44.8 13.6-44.8 1600,000
3-.inethylhexane l 3.6 11.9 3.6-11.9
benzaldehyde 5.7 11.1 6.6 5.7—11.1
1-methylethylbenzene’ 12.5 4.7 4.7-12.5
dichlorobenzene 7.5 8.4 5.8 5.8-8.4 6.9 300,000
1-phenylethanone l 5.6
hexane’ 2.4 180,000
pentane’ 6.2 13.4 6.2-13.4 180,000
methylcyclopentane 1 4.3 26.3 --
4-ethyl-2,2 dimethylhexane’ 2.1
2-inethylhexane l 8.3
2-ethyl-1-h xano l’ 75 15.1 21.0 17.8 7.5-21.0 —-
cyclohexane’ 1.0 1,050,000
2,3 d’iiuethylpentane 1 . 4.1
phenol 9.9 19,000
2-ethyl ,4—ethyl 1-pentanol’ 14.8
1,3 dimethylcyclopentane’ 25.5
heptançl l 10.6
octane’ 8.2 1,450,000
gasoline (not specifically
analyzed) 900,000
Total 38.6 71.3 97.3 97.2 60.3
1 Indicates a gasoline constituent
-------
concentrations of these substances, by—products of the chlorination
process, are well below the applicable EPA drinking water health stan—
ciard. The only positively identified organic contaminant in sump or
surface waters was 2-butanone. This compound is also often associated
with laboratory contamination.
Remarkably few tentatively—identified compounds appeared in
surface and sump waters and these were present at very low
concentrations. As may be seen from the table, no positively
identified contaminant exceeded health criteria.
5.2.4 Evaluation of Soil/Sediment Data
No health criteria or standards exist for organic contaminants In
soil or sediment. Of the 26 soil and sediment samples for which data
have been received, only 10 showed the presence of detectable levels
of contaminants. Four of the 10 samples were taken from the drum site
investigated by FIT at 11195 W. Belleview. One sample, (SO—XW2) was
taken from a very localized suspected gasoline spill at a residence in
Harriman Park.
Four soil samples and one sediment sample showed detectable
levels of organochiorine pesticides such as DOT and dieldrin. Four of
these were soil samples collected from the drum site at 11995 W.
Belleview. This finding is not unusual given the former agricultural
use of the area and the extreme persistence of these compounds in the
soil.
Research was conducted to help interpret the siginificance of the
organochiorine levels found in the soil at 11995 W. Belleview.
Organochlorine pesticide soil residues were studied for agricultural
soils in Colorado by Mullins and others (1971). Table 5.11 compares
the mean of Colorado analytical results and the mean of 11195 W.
Belleview analytical results.
57
-------
TABLE 5.11
Comparison of Pesticide Residues for Colorado and 11995 W. Belleview.
(ug/kg)
Mean Analytical W. Belleview
Pesticide Results-Colorado Mean Results
001 5.57 .041
Dieldrin 0.07 .010
Heptachior 0.01 .020
Endosulfan 0.04 .072
Mullins (1971) indicated that the residue levels reported for
Colorado are lower than those reported for other areas of the United
States. Given this fact, given the residue concentrations from W.
Belleview, and given the isolation of the W. Belleview site, these
residues do not present a health hazard to coninunity residents. In
addition, other soil samples in the actual Harriman Park area do not
exhibit similar concentrations of organochiorine pesticide residues,
indicating that the W. Belleview residues are probably confined to
this property.
5.2.5 Evaluation of Air Data
No health standards exist for volatile organics in ambient air.
However, the National Institutes of Occupational Safety and Health
(NIOSH) and the American Conference of Governmental ana Industrial
Hygienists (ACGIH) have issued health standards and criteria for
occupational exposure to air contaminants. Table 5.9 not only
includes the observed contaminant concentrations for Harriman Park,
but also includes the NIOSH standards and the ACGIH criteria for
workers.
-------
Occupational health criteria refer to airborne concentrations of
substances and represent conditions under which workers may be
repeatedly exposed day after day without adverse effect (ACGIH, 1983).
It is not strictly appropriate to compare occupational health criteria
to ambient air pollution levels for several reasons:
1) Workers are generally among the healthiest members of the
general population and can tolerate greater exposure than the
very old or very young and other members of the general
population with pre—existing health conditions.
2) Workers are exposed only during the 40 hour workweek,
whereas the general public is continuously exposed to ambient air
pollution.
Inclusion of these occupational health criteria in Table 5.9 is
provided for comparison purposes only. The Harriman Park samples were
found to be less than occupational health criteria by 1,000 to 100,000
fold.
Another method of assessing the significance of the reported air
contaminant concentrations is to compare with other Denver-area
monitoring data for airborne organic compounds. This was accomplished
by comparison of the off-site air sample collected at the Jefferson
County Health Department, 260 5. Kipling (A-8) with the remaining
Harriman Park samples. In addition, the Harriman Park sample
concentrations were compared with the reported values from a study of
ambient levels of volatile organics found in Denver (Singh, 1981).
Comparison of the Harriman Park samples (A—6, A—7, A-9 and A-b)
with the off-site sample A-8 indicates that most of the positively
identified compounds were observed with similar frequency and concen-
tration range in both the Harriman Park and the off-site air sample.
Comparison of tentatively-identified compounds between the Harriman
Park and the off-site sample. (Table5.1o), failed to establish any
pattern since the tentatively-Identified contaminants were
dissimilar.
r i
-------
The Harriman Park data were also compared to air concentrations
observed for Denver in the Singh study. The mean concentrations
observed by Singh (1981) are shown in Table 5.9. In each case, the
Singh results are greater than the Harriman Park sample results.
t .2.6 Discussion of Findings
No exceedances of health criteria were observed for any of the
organic analytical sample results. This is quite remarkable given the
large number of analyses (over 5000) performed.
Water Samples : The presence of chloroform and bromodichioro-
methane, collectively part of a larger group of compounds referred to
as trihalomethanes, was observed in drinking water samples from
Harriman Park. This occurs as the result of the chlorination process
used by municipal water supplies to disinfect water and has been -
documented to occur routinely throughout the world. National surveys
of water supplies have indicated that 95-100% of the finished
(treated) drinking waters surveyed contained chloroform. The mean
concentration at Harriman Park was 22.8 ugh which is well below the
EPA drinking water standards of 100 ugh.
In suninary the trihalomethanes detected in drinking water at
Harriman Park are not unique to Harriman Park, but are known to occur
throughout the Denver water system indeed in most drinking water
supplies.
A finding of pyrene and benzo(k)fluoranthene at SW-2 at trace
concentrations below the offical detection limit indicates one of two
thIngs: 1) the substances may actually not be present, or 2) SW-2 was
located downstream from the Wlllowbrook Stables where fence poles
likely have been treated with creosote preservatives, a very small
amount of which may have entered Weaver Gulch at that location. No
other occurrences of these contaminants were observed.
-------
Phthalates were tentatively identif led in some of the sump and
surface waters. Phthalates are ubiquitous in the environment (Versar,
1979) and are a common constituent in plastic products, hence a
finding of trace levels of phthalate acid esters in sumps is
consistent with the plastic construction of sumps observed in Harriman
Park.
Soil Samples : Sample S0-XW2 revealed numerous gasoline constit-
uents as a result of a leaking five gallon gasoline can that caused
gasoline vapors to infiltrate into a residence in Harriman Park.
Approximately 1-3 gallons seeped into the ground before the problem
was Identif led and corrected by the EPA Field Investigation Team.
The soil contaminants observed at the drum site, 11995 W.
Belleview, do not appear to be consistent with the type of materials
stored on the property. This indicates that little, if any spillage
of drum material has occurred. It is not likely that the pesticides
detected in the soil originated from the drums, based on drum label
information. Instead, they are likely the result of past pesticide
applications. Given the age of the dwelling on this site, and the
long—lived nature of the chlorinated hydrocarbon pesticides, it is
likely that the pesticides were used routinely around the dwelling
during the last 20 years, yielding the residues observed.
The only other contaminants detected more than once in soil (one
sample) and sediment (three samples) were the phthalate acid esters.
These contaminants are widely distributed In the environment. In
fact, sump waters also contained trace levels of phthalates suspected
to leach from plastic-lined sumps. Field inspection of sumps in liar-
riman Park revealed that many sumps discharge to the street and sump
water Is conveyed to Weaver Gulch and its tributaries in Harriman Park
via the storm sewer system. It is suspected that sump discharges
serve as a source of phthalates and that, due to the physical-chemical
properties of phtalates (high organic carbon affinity and
persistence), stream sediments accumulate low levels of phthalates.
61
-------
Air Samples : The nature of most of the air contaminants detected is
consistent with gasoline vapors and the likely combustion products
from gasoline. Among the positively—identified compounds, benzene,
toluene, and xylenes are present in gasoline (ACGIH, 1983; Maynard and
Sanders, 1969) and would be likely to be present in automobile ex-
haust. Among the tentatively—identified compounds, methylcyclohexane,
2-methyl hexane, 3-methylhexane, cyclohexane, hexane, pentane, dimeth-
ylpentane, methylcyclopentane, phenol and others are also found in
gasoline and probably automobile exhaust emissions, (ACGIH, 1980; May-
nard and Sanders, 1969). It appears highly probable that the air
monitoring for Harriman Park detected a large number of compounds
associated with gasoline vapors and automobile exhaust emissions. In
fact, the bulk of the total quantity of vapors detected appears to
associated with these sources, Table 5.9.
The other class of compounds detected are organic solvents typi-
cally used in surface coatings, adhesives and degreasing activities
(ACGIH, 1980; NIOSH 1981). This group includes 2—butanone, methyl
ethyl ketone), acetone, trichloroethylene, 1,1,1 trichioroethane,
methylene chloride, ethyl benzene and styrene. These compounds are
typically found in urban air at concentrations exceeding those obser-
ved in the Harriman Park study (Singh, 1981; Clark, et al, 1984).
5.3 Other Investigations
This section sumarlzes information collected as a result of
other investigations of dumping and or suspected hazardous waste
activities. These activities may be divided into: the drum site at
11195 W. Belleview, data compilation for the ERRIS sites, and other
miscellaneous investigations.
5.3.1 Drum Site
As described earlier, 62 drums were inventoried, 3 drums were
sampled, and 4 soil samples collected. Soil sample data are presented
with the rest of the organic data In 5.7. Drum Inventory data are
62
-------
presented in Table 5.12. These drums apparently contained raw and/or
waste products associated with hot tub manufacturing activities that
occurred onsite during the period 1982 to 1984. Most of the materials
are associated with polyester or polyurethane foam and resin products.
Drum samples indicated that the samples were ignitable and hence
hazardous waste by definition under CFR 261, regulations of the
Resource Conservation and Recovery Act.
On October 25, 1984, EPA-FIT observed the attempted unsafe and
illegal removal of these drums. The removal was halted with the
assistance of Jefferson County Sheriff’s Department and spilled
material was noted. EPA-FIT alerted the Bancroft Fire Department and
supporting agencies hazardous material emergency response team as well
as the EPA Emergency Response Team. EPA officials directed the safe
and imediate removal of the drums and spilled material under the
Agency’s Superfund authority later that same day.
5.3.2 ERRIS Site Data Compilation
As described earlier, EPA lists 25 known or suspected hazardous
waste sites in Jefferson and Douglas counties under its Emergency and
Remedial Response Information System (ERRIS). These sites have been
mapped (Figure 2.2), and none are nearer than 5 miles from Harriman
Park. Also, Harriman Park does not lie in the drainage patterns
potentially affected by any of the 25 ERRIS sites.
In response to public coinnents about the potential for offsite
ground water contamination from Martin Marietta and its possible
relationship to Harriman Park, EPA-FIT has included an analysis of
this question. The contaminant source areas in question at Martin
Marietta are located in the valley west of the Dakota Hogback. The
Fountain Formation, an arkosic conglomerate, is the principal bedrock
unit underlying the area. This valley is also covered with alluvial
and colluvial deposits. Thus, there are two potential ground water
routes for contaminant movement. One is via the alluvium of Brush
Creek into the Platte River valley, and the second is Into the
-------
TABLE 5.12
DRUM INVENTORY 11195 W. BELLVIEW
NUMBER CO? 4ENT
62 Total
36 Contain material
19 Empty, 7 undetermined
15 Open to air via bung
41 Upside down or on side
S Have residue outside drum
27 Marked DOT Flammable Liquid
24 Marked with other cautions
25 Labelled as “polyester resin” or “resin”
5 Labelled as polyurethane foam
7 Labelled as containing vinyl toluene
and styrene
3 Labelled as Isocyanates
2 Labelled as Acetone
6 Dented or rusted
-------
Fountain aquifer. The relationship between the Brush Creek route and
Harriman Park is discussed in a later paragraph.
The Fountain Formation extends more or less continuously from
Wyoming to Canon City, Colorado, lying unconformably on the
Precambrian granites and gneisses of the Front Range. The thickness
of the Fountain Formation varies but, in general, the unit is 1,500
to 3,000 feet thick. It dips approximately 56 to the east. The
Fountain is overlain by the following stratigraphic sequence, Figure
3.1 (with thicknesses): Lyons Sandstone (300 feet), Lykins Formation
(500 feet), Morrison Formation (400 feet), the Dakota Group (400
feet), Benton Shale (550 feet), Niobrara Formation (400 feet) and the
Pierre Shale (greater than 7,000 feet). This sequence is also present
at Harriman Park, although there is some increase in thickness of the
Pierre Shale due to repetition of the section along the Golden Fault.
Ground water movement in the Fountain Formation probably follows the
direction of dip along bedding planes. This direction is not towards
Harriman Park. Even if Harriman Park were directly downgradient and
in a similar stratigraphic location, it would be separated from the
Fountain Formation by a thickness of two miles of stratigraphic
section, most of which is comprised of tight shales.
In sumiary, the stratigraphic separation, the direction of ground
water flow and the linear distance between the locations preclude the
possibility of the Fountain Formation serving as a migration route for
contaminants between Martin Marietta and Harriman Park.
Ground water contamination in the Brush Creek alluvium can
potentially move into the Platte River alluvium. This route is
currently being investigated by EPA-FIT. A portion 0 f the concern
about contaminant presence at Marti Marietta focuses on whether
contaminants could enter the Kassler Water Treatment Plant. The plant
Is located irmiediately upstream from the confluence of Brush Creek and
the Platte River. Another ephemeral stream, Filter Gulch, leads from
Martin Marietta into the filtration galleries of the plant. Recently,
Information has come to light in a report by Woodward-Cl ie
-------
Consultants to Martin Marietta that high levels of contaminants exist
in the ground water of Filter Gulch.
A water supply distribution system connection exists between the
Kassler plant and the Harriman Park area. This potential exposure
route has been sampled, although at the time FIT was not aware of the
potential problems at the Martin Marietta. A portion of the water
from the Kassler plant may be fed to the Belleview and Simms storage
tank where it is blended with water from Marston Reservoir, affording
an extremely large dilution factor. Water is then pumped to the
Willo rook Water tank. This tank is located south of the Willo rook
area. Water from the tank was sampled on 10/23/84 by EPA—FIT. The
analyses for the sample DW-PDC were published in the FIT report on
Harriman Park. No evidence of contamination was found.
In addition, EPA—FIT collected wind data from the Colorado
Highway Department for a location near W. Quincy and S. Youngfield,
Figure 5.1. These data were collected daily from 1974 through 1977
and indicate that the prevailing wind directions are from the west and
the west-southwest. These directional vectors, plus the large dilu-
tion achieved by virtue of distance, greatly reduces the probability
of windborne air contaminants emitted from Martin Marietta or other
ERRIS sites reaching Harriman Park in detectable concentrations.
5.3.3 Miscellaneous Investigations
Potential dumpsites reported by residents at Harriman Park and
investigated by EPA—FIT included: (1) Hine Lake, (2) Zinnia Ct. and
Alkire, (3) the frontage road at U.S. 285 and (4) the area 1/2 mile NE
of Bowles and Alkire. The Hine Lake area had about 12 empty, rusted
barrels and an old homestead dump reported to contain a mineshaft. No
evidence of a mineshaft could be found. Zinnia Ct. and Alkire has
evidence of 1-2 gallons of motor oil dumped in the corner of the horse
pasture. The frontage road area contained auto parts, furniture and
other solid waste. The Bowles. and Alkire area was not specifically
identified, however the Initial Reconnaissance - Harriman Park inves—
-------
9.3
6.1
P LD UdVESTIGAT1ONS OF L d NT .LED
HAZARDOUS .5TS $11 ES
tili ISPO*T TI TNS SPA.
TITLIt WIND ROSE
HARRIMAN PARK
P8 -8410 14
ecology and rmwonmefl his.
sluvea. Cotouis.
.. .11Lt4s 0 Jt4 s
67
-------
tigation surveyed a gully with some 5 gallon drums and mostly house-
hold debris in this area.
The residence at one address (SO-XW), complained of chemical
odors in the basement. EPA-FIT investigated with CDH and verified the
odors and CDH collected an air sample. On November 2, 1984, EPA-FIT
excavated outside the foundation and recorded organic vapors at the 4
foot depth in a french drain. Subsequent site inspection revealed a
leaking 5 gallon gasoline can which had seeped into the soil and
penetrated the house’s french drain. The CDH air sample also revealed
gasoline as did an EPA-FIT soils sample. The leaking can was
removed.
EPA-FIT also conducted other support activities including a re-
view of historical aerial photography for the area. Aerial photo-
graphs dating back to 1972 were reviewed at the Jefferson County
Courthouse, National Cartographic Information Center and at the
Jefferson County Planning department in Golden, Colorado. Data from
the photos indicated the presence of borrow excavations in the form of
gravel pits and clay pits. There was no evidence of mining in the
Harriman Park development. Aerial photographs were also used to
compile the surface water drainage patterns of the study area.
-------
6.0 CONCLUSIONS
This chapter provides a brief statement of the conclusions that
may be drawn from the investigation. The conclusions may be divided
into three categories paralleling the organization of the report: (1)
importance of the environmental setting as it relates to public
health, (2) major findings relating to the inorganic data, (3) major
findings relating to the organic data. Reconinendations are presented
in 7.0.
6.1 The Environmental Setting and Public Health
An in—depth review of the geology and mineral history of the area
has been conducted and briefly sunmarized in the report. It has been
determined that two small inactive uranitin leases are located on the
hogback st of Harriman Park in the Dakota Formation. No evidence
points to off-lease migration or disposal of uraniu ore . The
residents of the Harriman Park con nunity are protected from the
uraniiin-beariflg Dakota Formation by 9,000 feet of shale and clayey
sediments.
6.2 Major Findings - Inorganic Data
Water analyses indicate that drinking water is of very high
quality, far exceeding drinking water health standards and criteria.
Surface waters are also of high quality, showing very little
degradation as they flow through the coninunity. Although these waters
do not entirely meet the rigid drinking water criteria, this is
typically the case throughout the world.
Sump waters evidence some degree of mineralization as water
percolates through the soil and enters the sump. Sump waters are not
fit for consumption, nor are they expected to be. However, incidental
contact between children and sump waters should not be considered a
health hazard, since the health standards are for lifetime ingestion
of the total or near total water requirement . It must be enphasized
a
-------
that children would have to ingest very large quantities on a daily
basis f or any possible health hazards to occur. There are innumerable
consumer products around the home that present far greater health
hazards for exploring children than sump water.
Soils and sediments concentrations of trace elements in Harriman
Park were found to be consistent with the offsite soil sample
collected south of Harriman Park. Although there are no U.S. health
criteria for trace elements in soils, the United Kingdom has published
recommended criteria for residential areas and schools. Harriman Park
soils do not even approach these levels.
6.3 Major Findings - Organic Data
Drinking waters did not exceed any water standard or health
criteria. Chloroform and other trihalomethanes were detected at
levels below the health standard in drinking water. This Is a routine
finding in nearly all public water systems throughout the country,
occurring as a result of the water disinfection process.
No positively Identified organic compounds were found in surface
or sump water.
Soils and sediment did not evidence any unusual findings. Very
low levels Of organochiorine pesticides and phthalates were detected
In some soil and sediment samples, which is not unusual considering
the extreme persistence of these compounds and the past agricultural
land uses of Harriman Park.
Air quality data did not indicate presence of any unusual
concentrations of organic compounds. Compounds detected were observed
to be in lower concentration than in studies of Denver and other urban
areas. Most of the contaminants appear to be attributed to gasoline
vapors or automobile exhaust emissions.
-------
6.4 Other Investigations
Numerous complaints of illegal dumping and other problems were
investigated. Only t locations required further investigation.
A drum site was discovered and investigated at 11995 W. Belleview.
The drums were removed by EPA on October 25, 1984. Site sampling has
f ailed to detect residual contamination. Another address was
determined to have a leaking 5 gallon gasoline can, the vapors from
which were infiltrating the home. The can was removed and the
homeowner advised on how to remedy the problem. No other sources of
hazardous substances were identified.
“-i-
-------
REFERENCES
Mierican Conference of Governmental Industrial Hygienists, 1980.
Docui entation of the Threshold Limit Values, Fourth Edition.
BERG, R. 1962. Subsurface interpretation of the Golden Fault at Soda
Lakes, Jefferson County, Colorado: . Assoc. of Petroleuii
Geologists, Bull. Vol. 46, No. 5, —. 704—707.
BRYANT, B.; MILLER, R.D.; and SCOTT, G.R. 1973. Geologic Map of the
Indian Hills Quadrangle, Jefferson County, Colorad: U.S. Geol.
Surv. Map GQ-1073.
CLARK, A.!.; McINTYRE, AE.; LESTER, J.N.; PERRY, R. 1984. Pnibient
Air Measurements of Aromatic and Halogenated Hydrocarbons at
Urban, Rural and Motorway Locations. Sd. Total Environ:
39:265—279.
Colorado Department of Highways; 1984. Wind speed and direction data
for Harriman Park.
DICE, J., Denver Water Department, personal communication December 4,
1984.
GROSSMAN, E.L., 1957. Uraniiju Deposits of the Colorado Front Range:
National Western Mining Conf., 60th Trans., Vol. 1, Denver,
Co 10.
Jefferson County Planning Dept. 1984. Base map nuther 17: Scale 1
inch—500 feet. Last Revision 9-27-84.
KIRKHAM, R.M.; and LADWIG, L.R. 1979. Coal Resources of the Denver
and Cheyenne Basins, Colorado: Cob. Geol. Surv. Resource
Services.
-------
REFERENCES Cont.
LINDVALL, R.M. 1978. Geologic Map of the Fort Logan Quadrangle,
Jefferson, Denver, and Arapahoe Counties, Colorado: U.S. Geol.
Surv. Map GQ-1427.
MAYNARD, J.B.; SANDERS, W.W. 1969. Determination of the Detailed
Hydrocarbon Composition and Potential Atmospheric Reactivity of
Full Range Motor Gasolines, Air Pollution Control Association
Journal, Vol. 19, #7: 505.
MULLINS, D.E.; JOHNSON, R.E.; STARR, R.I., 1971. Persistence of
Organochiorine Insecticide Residues in Agricultural Soils in
Colorado, Pesticides Monitoring Journal, Vol. 5, No. 3. pp.
268—275.
NELSON—MOORE, J.L.; COLLINS, D.B.; and HORNBAKER, A.L. 1978.
Radioactive Mineral Occurrences of Colorado and Bibliography:
Cob. Geol. Surv., Bull. No. 40, 1054 p.
Northway—Gestalt Corp. 1982. Aerial Photographs of the Denver
Metropolitan Area: Scale 1 inch—500 feet. Photographed October
4, 1982.
Safe Drinking Water Comittee, National Research Council, 1980.
Drinking Water and Health, Vol. 3. Washington D.C., pp. 5—19.
Safe Drinking Water Committee, 1982. Drinking Water and Helath,
National Academy Press. 4:166.
Safe Drinking Water Committee. 1983. Drinking Water and Health.
National Academy Press. 5:98
SCOTT, G.R. 1962. Geology of the Littleton Quadrangle, Jefferson,
Douglas and Arapahoe Counties: U.S. Geol. Surv. Bull. 1121, Map
Scale 1:24,000.
-------
REFERENCES Cont.
SCOTT, G.R. 1972. Geologic Map of the Morrison quadrangle, Jefferson
County, Colorado: U.S. Geol. Survey Map 1-790—A.
SINGH, H.B.; SALAS, L.J.; SMITH, A.; STILES, R.; SHIGEISHI, H., 1981.
Atmospheric Measurements of Selected Hazardous Organic Chemicals,
Environmental Sciences Research Laboratory, Environmental
Protection Agency, Research Triangle Park, 7 pp.
SMITH, M.A. 1981. Tentative Guidelines for Acceptable Concentrations
of Contaminants in Soils. euilding Research Station, Department
of the Environment.
U.S. Dept. of Agriculture, 1980. Soil Survey of Golden rea,
Colorado: Soil Conservation Service (USDA—SCS), National
Cooperative Soil Survey.
U.S. EPA 1976a. National Interim Primary Drinking Water Regulations,
EPA-570/9—76 —003.
U.S. EPA Water Quality Criteria. 1980. Federal Register 45(231):
203-220.
U.S. EPA 1976b. Quality Criteria for Water.
U.S. Geological Survey. 1965a. Topographic Map of the Indian Hills
Quadrangle, Colorado: Scale 1:24,00 Revised 1980.
U.S. Geological Survey. 1965b. Topographic Map of the Littleton
Quadrangle, Colorado: Scale 1:24,000. Revised 1980.
U.S. Geological Survey. 1965c. Topographic Map of the Morrison
Quadrangle, Colorado. Scale 1:24,000. Revised 1980.
-------
REFERENCES Cont.
U.S. Geological Survey. 1965d. Topographic Map of the Fort Logan
Quadrangle, Colorado: Scale 1:24,000. Revised 1980.
Versar, Inc. 1979. Water-Related Fate of 129 Priority Pollutants, Vol
II. NTIS, Springfield, Ill. p 94—1.
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8.0 APPENDIX A
ERRIS SITE SUMMARIES
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SITE NAME: Ensigri—Bickford Co .
MAP NUMBER: 1
EPA ID NUMBER: C0D075754663
TDD: - R8—8405—04
SITE INVESTIGATION: 11—5—81 and 4—23—82, EPA
PRELIMINARY ASSESSMENT DATE: 5-23-84
LOCATION: 7800 N. Moore Rd; Louviers, CO 80131
FACILITY: Manufacturing/Processing of Explosives
CONDITIONS: An estimated 3,200 pounds of wastewater and 36,000 pounds of reactive
waste is generated each year.
REPORT: The wastes are disposed of by open burning and are in compliance with
RCRA (40 CFR 265.302).
STATUS: No change in waste treatment and disposal has been reported. Air moni-
toring equipment, procedures, and records will be checked during site
inspections. Ground water sampling may be necessary to determine if
site operations are causing nitrate contamination.
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SITE NAME: Mplycor . Inc .
MAP NUMBER: 2
EPA ID NUMBER: C0D076448794
TDD: __________________________
SITE INVESTIGATION: July, 1980
PRELIMINARY ASSESSMENT DATE: November, 1979
LOCATION: 4 1/2 miles north of Sedalia, CO
FACILITY: Metals and Ore Processing
CONDITIONS: Drums of inorganic and radioactive materials are stored at the
site. The site began operation in 1966 as a refinery of RAR 1/2
earth compounds using a solvent extraction çrocess. Yttrium oxide,
lanthanum oxide praeseoclymium oxide, neodytnin carbonate, and liquid
radioactive material are produced and handled at the 75 acre site.
REPORT:
STATUS: The site was still active in August, 1983.
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SITE NAME: DuPont DeNernpurs and Co
MAP NUMBER: 3
EPA ID NUMBER: C0D980499149
TDD: ______________________________
SITE INVESTIGATION: August, 1980
PRELIMINARY ASSESSMENT DATE: November, 1979
LOCATION: Northwest edge of Louviers, CO
FACILITY: Landfill — Municipal Chemical Storage
CONDITIONS: Manufacturing of nitroglycerine took place between 1915 and 1970.
The types of hazardous materials stored at DuPont include Petn
(Pentaerythritol tetra—nitrate) a detonator, which was stored in
two evaporation ponds.
REPORT:
STATUS: The 10 acre site was discovered in October, 1979 and the site inspection
and preliminary assessment were completed within the following year.
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SITE NAME: Martin Marietta Corn .
MAP NUMBER:
EPA ID NUMBER: C0000010012
TDD: R8—8410—17
SITE INVESTIGATION: 4—7—80 EPA, 8—13—80 EPA/CDH, 12—11—84 E&#
PRELIMINARY ASSESSMENT DATE: 8—13—80 and update 3—85
LOCATION: West of Chatfield Darn; Waterton, CO 80201
FACILITY: Aerospace Products & Research
CONDITIONS: One active and one inactive waste disposal site (ponds) have ground
water monitoring systems. Over 50 monitor wells exist at the Waterton
facility. The types of hazardous materials handled, treated or dis-
posed at Martin Marietta Aerospace were general chemicals, metal sludge,
aluminum sludge, domestic and industrial sludge, sewage, cutting oils,
and some machine oils and fluorine dyes, chemical milling and metals
finishing residue, sodium metabisulfide, sulfuric acid, hexavalent
chromium, Radium 228 and phosphorus, and various solvents. The two
ponds containing waste were approximately 14,000 and 10,000 square
feet. The active RCRA regulated site is currently being inspected
by the State and EPA for compliance with applicable regulations.
REPORT: Ground water samples from the alluvial aquifer indicate that con-
tamination due to alluvial aquifer leakage from the ponds has
occurred.
STATUS: FIT sampled the site in February, 1985 to confirm past results and
specifically Identify hazards. Recent findings indicate that tn—
chloroethylene has migrated off—site in groundwater from the RCRA
facility and possibly from inactive areas and has been detected in
the infiltration gallery at the Denver Water Board’s Kassler Plant.
Further EPA, State and responsible party investigations are continuing
at this site.
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SITE NAME: Shattuck Chemical Company
MAP NUMBER: 5
EPA ID NUMBER: C0D000716647 or 54
TDD: _________________________________
SITE INVESTIGATION: None
PRELIMINARY ASSESSMENT DATE: None
LOCATION: Northeast of Waterton, CO
FACILITY: Chemical Storage, Treater, Recycler
CONDITIONS: 56,000 drums of inorganics are stored at the 30 acre treatment—
recycling site. The material includes spent petroleum catalysts
and molybdenum dissolution by—products, nickel and cobalt.
REPORT:
STATUS: The site began operation in February, 1979 as a drum storage area and
recycling facility. The site was discovered in August 1980 and it may
still be active.
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SITE NAME: FHWA—Central Direct Federal Division Material Co .
MAP NUMBER: 6
EPA ID NUMBER: C04690090010
TDD: R8—8405—04
SITE INVESTIGATION: August 12, 1983 EPA
PRELIMINARY ASSESSMENT DATE: May 24, 1984
LOCATION: Federal Center, Bldg 52, Denver, CO
FACILITY: Laboratory that tests road materials
CONDITIONS: Lab uses and generates small quantities (less than 250 gallons
per year) of trichlorvethane. It is a vapor hazard with highly
toxic fumes.
REPORT: Waste solvent is stored in an underground tank. It is possible some
solvent goes into a drain system.
STATUS: Information available indicates the “low” priority is legitimate.
Wastes in storage should be identified during next site inspection.
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SITE NAME: Rooney Road Landfill
NAP NUMBER: 7
EPA ID NUMBER: C0D980666598
TDD: F881011
SITE INVESTIGATION: June, 1980
PRELIMINARY ASSESSMENT DATE: May, 1980 EPA
LOCATION: Roosevelt Road and 1—70; Golden, CO
FACILITY: Municipal Landfill
CONDITIONS: The types of hazardous materials disposed at the 60 acre Rooney Rd
Landfill were solid household and commercial wastes, methane, septic
tank waste and Coors wastewater.
REPORT:
STATUS: The landfill was closed in 1981.
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SITE NAME: Mountain Chemical Company
MAP NUMBER: 8
EPA ID NUMBER: ___________________
TDD: R8840504
SITE INVESTIGATION: ________________
PRELIMINARY ASSESSMENT DATE: May 11, 1984
LOCATION: 16035 W. Fourth Ave.; Golden, Co (Pike and 4th Street)
FACILITY: Chemical Processing/Recycling
CONDITIONS: Industrial solvents, (flammable and non —flaimnable) from non—specific
sources are treated and stored at the facility. 300 to 500 drums or
40,000 gallons are stored, recycled or sent off site.
REPORT: The facility is in close proximity to a residential area. No hazardous
conditions or incidents have been observed.
STATUS: The quantity of wastes and proximity to the residential area support a
“medium” priority rating for the 1 acre site.
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SITE NAME: Solar Energy Research Institute
MAP NUMBER: 9
EPA ID NUMBER: C04890000017
TDD: R8—840504
SITE INVESTIGATION: ________________________
PRELIMINARY ASSESSMENT DATE: May 23, 1984
LOCATION: 2 Sites — #1. 1—70 and Hwy. 40; Golden, CO
#2 Camp George West; Golden, Co
FACILITY: Research and Manufacturing of Solar Energy Equipment — Chemical Storage
cONDITIONS: Small amounts (less than 150 gallons) of ignitable and reactive
wastes are generated and stored for recycling. Site #1 is in the
Lena Gulch Drainage that drains into Maple Grove Reservoir — the
reservoir is part of a municipal water supply system. The site
covers 75 acres.
R ORT: Wastes are stored in drums and collected weekly. Solvents are recycled
by Oil Solvent Processing Co.
STATUS: Adequate waste handling and practices have been reviewed. FIT concurs
with “low” priority. Protection measures should be outlined for Lena
Gulch relavent to an uncontrolled release.
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SITE NAME: 1r r 1r Srhnr 1 nf M npg w e rrh Tncri iit
MAP NUMBER: 10
EPA ID NUMBER: C0D00823401
TDD: R8—8408—23
SITE INVESTIGATION: October 11, 1984 E&E, EPA, CDI I
PRELIMINARY ASSESSMENT DATE: November 5, 1984
LOCATION: Far west end of 12th Street; Golden, CO
FACILITY: Ore Processing & Research
CONDITIONS: The 10 acre site is adjacent to Clear Creek ground and surface water
are potentially threatened by migrating wastes. Old tailings pond
covers less than 1 acre. Drum disposal area with about 100 drums.
March 1984 kerosene/tarspill.
REPORT: Tailings pond is bermed but no design criteria are available and is
being deccrrrlssioned. It is regulated and monitored by RCRA. Most
drums are empty. A few are being held for shipment and off—site disposal.
The March, 1984 spill of Tar Sands and kerosene (several hundred gallons)
into a ditch locally destroyed vegetation and was cleaned up by June,
1984.
STATUS: The site is regulated by RCR.A and monitored by CDII. FIT recommended
comprehensive on—site monitoring.
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SITE NAME: Coors Porcelain Co .
MAP NUMBER: 11
EPA ID NUMBER: C0D007057334
TDD: __________________________
SITE INVESTIGATION: None
PRELIMINARY ASSESSMENT DATE: October, 1980
LOCATION: 600 9th Street; Golden, CO
FACILITY: Chemical Production (inorganic)
cONDITIONS: Ceramic products are manufactured at the site. Berylium oxide
and lead compounds have been generated in the past.
REPORT:
STATUS: The 5 acre site is still active but the hazards and size of hazard
areas are unknown.
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SITE NAME: Adolf Coors, Inc .
MAP NUMBER: 12
EPA ID NUMBER: C0D980499107
TDD: ______________________________________
SITE INVESTIGATION: Nnn a! Di cr v ry J nh1 ryr l ( )
PRELIMINARY ASSESSMENT DATE: F bruRry. 19 0
LOCATION: Hwy 72 & Hwy 93; Golden, Co
FACILITY: Chemical Disposal
CONDITIONS: Cleaning solvent (Rapadine), grain and water have been disposed
of on the 80 acre site.
REPORT:
STATUS: The site may still be active.
recycled paper ,olo and en fronmenI
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SITE NMiE: Coors Container Co .
MAP NUMBER: 13
EPA ID NUMBER: C0D054929989
TDD: ___________________________
SITE INVESTIGATION: August, 1980
PRELDIINARY ASSESSMENT DATE: April. 1983
LOCATION: 17755 W. 35th Ave.; Golden, CO
FACILITY: Chemical Storage (organic)
CONDITIONS: The site began as a container producing location for Coors.
RZPORT:
STATUS: Glue waste, cold cleaner — 456 and spent non halogenated solvents were
present at the site. It was still active in December, 1983.
r.cyclsd papir e._oLo y and . nmen’
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SITE NAME: Coors Porcelain Co. — Clear Creek
MAP NUMBER: 14
EPA ID NUMBER: C0D000818179
TIM): _______________________________________
SITE INVESTIGATION: ________________________
PRELIMINARY ASSESSMENT DATE: _______________
LOCATION: 17750 W. 32nd Ave.; Golden, CO
FACILITY: Plastic & Porcelain Products
CONDITIONS: Manufactures for the micro—circuit industry and generates lead
acid waste and spent solvents from machinery maintenance. The site
covers 14 acres.
REPORT:
STATUS: No action has been conducted at this site.
SCYdSd PP scology and vlronm.ne
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SITE MANE: Coors Salvage Yard
MAP NUMBER: 15
EPA ID NUMBER: C0D980951107
TDD: __________________________
SITE INVESTIGATION: ____________
PRELIMINARY ASSESSMENT DATE: July 12, 1984
LOCATION: 1/2 Mile West of McIntyre; Golden, CO
FACILITT: Unknown
CONDITIONS: Unknown
REPORT:
STATUS:
mcycl.d p.p.r
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SITE NAME: Adolf Coors Co .
MAP NUMBER: 16
A ID NUMBER: C0D007057342
TDD: _________________________
SITE INVESTIGATION: None
PRELIMINARY ASSESSMENT DATE: None
LOCATION: 6500 W. 35th Ave.; Golden, CO
FACILITY: Chemical Storage (unknown material with drums)
cONDITIONS: The one acre site began operation as a salvage yard and was still
active during November, 1983.
REPORT:
STATUS: No action has been conducted.
rscyclsd p.psr .co1o .nd .n,ironm.nl
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SITE NAME: Colorado Chemical Specialties
MAP NUMBER: 17
EPA ID NUMBER: C0D05656644] .
TDD: FR—Si 05—1
SITE INVESTIGATION: May 15. 1984
PR fl1INAR! ASSESSMENT DATE: SeDtember. 1980
LOCATION: 4295 McIntyre; Golden, CO
FACILITY: Chemical Company
CONDITIONS: The types of hazardous materials stored at Colorado Chemicals Company
are styrenes and benzenes and formulations of 1,2—vinylpolybutyldiene.
REPORT:
STATUS: 11—80 the site had a release of butadiene and in 4—81 the site had a
fire. The site may still be active.
rscyclsd pgir
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SITE NAME: Hazen Research, Inc .
MAP NUMBER: 18
EPA ID NUMBER: C0D048742175
TDD: R8. .. ..8405 . . .04
SITE INVESTIGATION: March 11, 1982 EPA & CDII
PR JIMINARY ASSESSMENT DATE: May 24, 1984 and September 13, 1984
LOCATION: 4601 Indiana; Golden, CO 80401
FACILITY: Processing Laboratory and Mining Research
CONDITIONS: Toxic and corrosive wastes in drum storage of solvents and organic
chemicals (and wastewater treatment systems) are stored (or
operated) on site. Lead chloride, arsenic, phosphoric acid and
mercury contaminated soil have been reported on the site.
REPORT: No hazardous conditions were observed and the facility was in compliance
with RCRA standards. Up to 1800 gallons of waste may be stored in
drums on the site.
STATUS: The adjacent surface water (Croke Canal, Wannainaker Ditch) is either
protected from contamination by the local geology or treatment procedures
used at the facility. FIT concurs with the “low” priority assessment if
the outlined procedures and protection is maintained.
.cok y sad en nm.nI
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SITE NAME: Wheatridge Public Works Shop and Yard
MAP NUMBER: 19
EPA ID NUMBER: C00980634836
TDD: R8840504
SITE INVESTIGATION: None
PRELIMINARY ASSESSMENT DATE: May 23, 1984
LOCATION: 11220 W. 45th Ave.; Wheatridge, CO 80033 (45th 4 Robb Street)
FACILITY: Municipal Public Work Shops/Yard
cONDITIONS: 400 gallons of fluid was stored in 8 drums above ground on the
1.8 acre site.
REPORT: Content of drums was analyzed and found to contain waste oil and
antifreeze with rust inhibitor. The drums have been moved off site
for recycling/disposal.
STATUS: City has installed an underground 500 gallon storage tank to store
waste oil for recycling. FIT concurs with CDN on “low” priority rating.
rscyc$,d p.p.r .cology and .nvUonm.nt
-------
SITE NAME: Rocky Mountain Bank Note
MAP NUMBER: 20
EPA ID NUMBER: C0D087077621
TDD: R8840504
SITE INVESTIGATION: April, 1983
PRELIMINARY ASSFSSMENT DATE: April, 1983
LOCATION: 4990 Iris; Wheatridge, CO (Iris and 50th Avenue)
FACILITY: Printing Office/Chemical Storage
CONDITIONS: Three drums of ignitable liquid (printing machine cleaner) are
stored at the site. The solvent is collected and reprocessed
off—site.
R ORT: No potential environmental hazards have been observed with present
practices. Waste quantities are small well controlled and disposed
of in a proper manner.
STATUS:
mcyc d pap.c .j ,
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SITE NAME: Colorado School of Mines Research Institute
MAP NUMBER: 21
EPA ID NUMBER: C0D99130518
TDD: ____________________________________
SITE INVESTIGATION: Au2ust. 1980
PRELIMINARY ASSESSMENT DATE: April. 1982 EPA
LOCATION: 5290 McIntyre; Golden, CO
FACILITY: Chemical Disposal/Mineral Research
CONDITIONS: Organic and inorganic (80,000 cu. ft.) materials have been disposed
of into a landfill on the 29 acre site.
REPORT:
STATUS: The site was still active in December, 1983. It was discovered in
August of 1980 and yttrium, sodium cyanide, tetrachioroethylene and
acetone are some of the reported hazardous materials.
recyd.d pepir .eologj m d envWonm.nt
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SITE flAME: Coors Porcelain Co .
MAP NUMBER: 22
EPA ID NUMBER: C0D980635197
TDD: _____________________________
SITE INVESTIGATION: ________________
PRELIMINARY ASSESSMENT DATE: October, 1980
LOCATION: 1/2 Mile South of Ralston Reservoir
FACILITY: Clay Mine
CONDITIONS: Unknown
REPORT:
STATUS:
r.cyc .d pap.r
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SITE NAME: Leyden Landfill
MAP NUMBER: 23
EPA ID NUMBER: _____________
TDD: R884060l
SITE INVESTIGATION: June 8, 1984
PRELIMINARY ASSESSMENT DATE: _____
LOCATION: SEC 25, T2S, R7OW, near 82nd and Indiana, West of Arvada, CO
FACILITY: 68 acre inactive sanitary landfill (non—hazardous residential,
industrial and commercial)
CONDITIONS: The landfill contains about 700,000 tons of refuse that was placed by
the area fill method. Materials were compacted and covered with
soil daily.
REPORT: Ground water monitoring wells installed since 1981 indicate low levels of
organics heavy metals, cyanide and pesticide in the shallow groundwater.
The geology of the area will probably inhibit contamination migration to
the Fox Hills Aquifer 500 ft. below the site. No water quality data
are available on surface water on or adjacent to the landfill. Silt from
landfill slope is clogging Church th.tch south of the landfill.
STATUS: Colorado Dept. of Health conducts periodic state compliance inspections.
Ground water is sampled quarterly by Jefferson County. FIT has also
sampled surface and ground water and sediments. No determination of
hazards to the environment have been identified at this time.
mcyc d gap.r
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SITE NAME:
Rocky Flats Industrial Park
MAP NUMBER:
EPA ID NUMBER:
24
TDD: F8—8107—O1A
SITE INVESTIGATION: November, 1981
PRELIMINARY ASSESSMENT DATE:
February 9, 1982
LOCATION: South of Hwy. 72 between Cob. 93 and Arvada; North of Golden, CO
FACILITY: Great Western Inorganics (GWI) American Ecological Recycle Research
Corp. (A ERR) Thoro Products Co.
GWI manufactures chemicals (halides, sulfides, sulfates, nitrates,
phosphides, phosphates, oxides, tellurides, selenides and other
metals)
A ERR stores and reclaims waste chemicals for resale.
Thoro is a chemical storage and handling facility.
CONDITIONS:
REPORT: EPA, CDH and FIT
Thoro properties
Arsenic, mercury,
concern. The GWI
STATUS: Unknown
have enforced compliance to RCRA at AERR. GWI and
have also been sampled and reviewed for compliance.
iron, lead and capmium are the contaminants of
property is the area of most concern.
—
. .l.v and m’wbenm.n*
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SITE NAME: Rocky Flats Plant
MAP NUMBER: 25
EPA ID NUMBER: C07890010526
TDD: ______________________
SITE INVESTIGATION: _________
PRELIMINARY ASSESSMENT DATE: November, 1979
LOCATION: Hwy 93; Golden, CO
FACILITY: Radioactive Debris
cONDITIONS: Radioactive waste material deposited on site in a landfill. The
site began operation in 1951 as a manufacturer of nuclear weapons
components. The plant has disposed of radioactive waste on
the 2,560 acre site.
REPORT:
STATUS: The land burial disposal site closed in 1975 and the plant is still
active. The facility was ranked by the EPA and included in the
latest update of the Superfund National Priorities List (NPL).
rscyclsd pcpsr eco 8 o y .nd .rn’üonm.ni
-------
8.0 APPENDIX B
OTHER RAW DATA
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ENViRONMENTAL P CTION AGENCY
REGION VUl. D COLORADO
LABORATORY S ICES REQUEST
PROJECI NAME I- f i . l ? - P/ F <. _ PROJECI CODE k 1c- ‘i ( W-c7 SAMPlES CO(L By H I k DATE iO -,
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AT lABORATORY BY______ __________ __________ __________ DATE — DATA REVIEWED BY __________
STATION CODE
SAMPLECOLIT 1ME ,t’ o
STATION DESCRIPTION 2.
1
AND REMARKS
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CODE
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REGION VIII, D( ‘)COLORADO
LABORATORY SLIICES REQUEST
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STAIION DESCRIPTION
AND REMARKS
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REGION VIII. DENVER. COLORADO
LABORATORY SERVICES REQUEST
PROJECT NAME ‘ k — rt o#vtIts’ec -( ,( Pr’ , PROJECT CODE ________ SAMPLES COIL. BY_________ DATE il-is
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CODE
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SAMPLES RECEIVED AT LABORATORY BY
STATION CODE
STATION DESCRIPTION
AND REMARKS
II
DATE_________ DATA REVIEWED BY.
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