Environ mental Monitoring
PO Box 93478
La» Vega., NV 89193-3478
I • t-
AF.R1AL PHOTOGRAPHIC ANALYSIS OF THE WESTLAKE LANDFILL S1TF.
M. A. ElnKbeiner
Environmenta 1 Programs
LocKhecd F.nqineerinq and Sciences Company
Las Veqas. Nevada 89193-3478
Contract No. 68-03-3245
J. L. JacK
Advanced Honitorinq Systems Division
Environmental Monitorinq Systems Laboratory
Las Veqas. Nevada 89193-3478
ENVIRONMENTAL MONITORING SYSTEMS LABORATORY
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
LAS VEGAS. NEVADA 891933478
This document has undergone a technical and quality control/assurance review
and approval by personnel ot the Et’A/OKD Environmental Monitoring Systems Laboratory
at Las Vegas (EHSL LV). and is (or internal Agency use and distribution only.
This report presents an intensive analysis of the WestlaKe Landfill site.
located neat Bridqeton. Missouri. Tvelve selected dates of blac* and white
panchromatic, color infrared, and conventional color aerial photography acquired
over a 49-year period (1941 19B9) were used to perform the analysis.
The West lake Landfill was a limestone extraction and processing facility from
prior to V941 through 1989. Waste disposal was first observed in 19SJ and was
observed through 1989. Large amounts of solid waste and sludge were disposed of in
large unlined cells or in landfills. Numerous stains and pools of liquid throughout
the site also indicated that extensive liquid waste disposal was also done. Some of
this waste was noted outside the site in 19SB. Discolored soil, contaminated
standing liquid, and leachate breakouts were also observed.
The U.S. Environmental Protection Agency’s Environmental Monitoring Systems
Laboratory in Las Vegas, Nevada, prepared this report for the Agency’s Region 7
Environmental Services Division in Kansas City, Missouri and the Office of Emergency
and Remedial Response in Washington D.C.
Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ill
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Analysis Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . S
Photo Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1 Site location nap. Missouri . . . . . . . . . . . . . . . . . . . . . vi
2 Local site location map. Bridqeton. Missouri . . . . . . . . . . . . . 4
3 WestlaKe Landfill Site. July 30. 1941 . . . . . . . . . . . . . . . . 9
4 WestlaKe Landfill Site. August 14. 19S3 . . . . . . . . . . . . . . . 11
5 Westlake Landfill Site. May 13. 1958 . . . . . . . . . . . . . . . . . 13
6 WestlaKe Landfill Site. October 10. 196S . . . . . . . . . . . . . . . IS
7 WestlaKe Landfill Site. March 7, 1968 . . . . . . . . . . . . . . . . 17
8 WestlaKe Landfill Site. May 4, 1971 . . . . . . . . . . . . . . . . . 19
9 WestlaKe Landfill Site. May 6, 1974 . . . . . . . . . . . . . . . . . 21
10 WestlaKe Landfill Site, April 8. 1977 . . . . . . . . . . . . . . . . 23
11 WestlaKe Landfill Site, July 26. 1979 . . . . . . . . . . . . . . . . 2S
12 WestlaKe Landfill Site. March 7. 1982 . . . . . . . . . . . . . . . . 27
13-14 WestlaKe Landfill Site. April 16, 19BS . . . . . . . . . . . . . . . . 29
IS WestlaKe Landfill Site, April 20, 1989 . . . . . . . . . . . . . . . . 33
1 Documentation of Aerial Photography . . . . . . . . . . . . . . . . . 3
*’;-.-“‘ — I*’-, i””‘1″*’ ‘”•••
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.•.•^”.v±*^ziz^] ;*it^t.Ui.^j-.< v-r^v.^.-j: T.^t?f rv'"T-;.~J^'^ J-; UNITED STATES (1872) Figure 1. Site location map. Missouri. Scale 1:2.500.000. INTRODUCTION This report presents an Intensive analysis of the WestlaKe Landfill site located along the south side of State Route US in Bridqeton. Missouri (Figures 1 and 2). The report was prepared to document physical conditions and potential environmental hazards at the site through tire. Twelve selected dates of black and white panchromatic, color Infrared, and conventional color aerial photography acguired over a 49 year period (1941-1989) were used to perform the analysis. The WestlaKe Landfill site was a limestone extraction and processing facility throughout the analysis period. Beginning In 1953 waste disposal was also practiced at the site. By 1968 this appeared to be the main activity at the site. The focus of this analysis was on examining the nature and extent of potential environmental hazards at the site and tracing them through time. The U.S. Environmental protection Agency's Environmental Monitoring Systems Laboratory in Las Vegas, Nevada, prepared this report for the Agency's Region 7 Environmental Services Division in Kansas City, Missouri and the Office of Emergency and Remedial Response in Washington D.C. METHODOLOGY Stereoscopic pairs of current and historical aerial photographs ace used to perform the analysis. Stereo viewing enhances the interpretation because it allows the analyst to observe the vertical as well as horizontal spatial relationships of natural and cultural features. Stereoscopy is also an aid in distinguishing between various shapes, tones, textures, and colors that can be found within the study area. Evidence of waste burial Is a prime consideration when conducting a hazardous waste analysis. Leachate or seepage resulting from burial and dumping of hazardous materials might threaten existing surface or ground water sources. Fools of unexplained liquid are routinely noted because they can indicate seepage from buried wastes that may enter drainage channels and allow contaminants to move off the site. An excellent indicator of how well hazardous materials are being handled at a site is the presence or absence of spills, spill stains, and vegetation damage. Trees and other forms of vegetation that exhibit a marked color difference from surrounding members of the same species are labeled "dead," 'stressed,' or "damaged" based upon the degree of noticeable variation. Vegetation is eo labeled only after consideration of the season in which the photographs were acquired. The U.S. Environmental Protection Agency's Statement of Procedures on Floodplaln Management and Wetlands Protection (Executive Orders 11968 and 11990. respectively) requires EPA to determine If removal or remedial actions at hazardous waste sites will affect wetlands or floodplalns and to avoid or minimize adverse Impacts on those areas. To aid In compliance with these orders, significant wetland areas located within and adjacent to the sites have been Identified and delineated. However, the sites have not been visited to verify the accuracy of wetland identIf icatIon. Drainage analysis determines the direction a spill or surface runoff would follow. Direction of drainage is determined from analysis of the photographs and from U.S. Geological Survey topographic maps. Whenever they are available. 7.S minute quadrangle maps (scale 1:24.000) are used to show site location and to provide geographic and topographic Information. mi* Cll: C*IM I CC: C» IPkol* »SC»: UM: •••• SUIDl M(| DULl •-•• t • •4' • t H fa fa fa Results of the analysis are shown on annotated overlays attached to the photos. The following table provides documentation of the photographs used in this report: TABLE 1. DOCUMENTATION OF AERIAL PHOTOGRAPHY Site name , SSID. locat ion, and geoq r aph i c coordinates WOK t lake Landfill Bridqeton. MO 38M6' 12"N 090°26' 43-W SSIDt MO-14 Figures J 4 S 6 7e 9 10 11 12 13-14 IS Date of Original acquisi t ion scale 07- 08- OS 10- 03- OSOS- 04- 07- 03- 04- 04- 30- 14- 13- 10- 07- 04- 06- 08- 26- 07- 16- 20- 41 1 S3 1 S8 1 6S 1 68 1 71 1 74 1 77 1 79 1 82 1 BS 1 89 I 20 20 20 20 24 20 30 24 7. 24 24 19 .000 .000 ,000 .000 .000 .000 .000 .000 BOO .000 .000 ,700 Film typet B&W B(,W BS.W B&W Bf,W BfcW B6.W BiW CIR CC B&W CC Photo source^ ASCS ASCS ASCS ASCS EROS ASCS EROS SURD EMSL EMSL EROS EMSL Photo I .D. TO 8B TO 2K TO-2T TQ-1FF VBZG TQ-2MM VDMT 7964 62040 VFJK 89787 Frames 121 91 SO 173 3-24S 17S 1-193 1S4 219 211 2-131 4 tFilm type identification: B4W: Black-and-White Panchromatic CIR: Color Infrared CC: Conventional Color tPhoto source identification: ASCS: U.S. Department of Agriculture. Agricultural Stabilization and Conservation Service. Salt LaKe City. Utah. EROS: U.S. Department of the Interior. Geological Survey. Earth Resources Observation Systems Data center, Sioux Falls. South Dakota. SURD: Surdex Corporation. Chesterfield. Missouri. EMSL: U.S. Environmontal Protection Agency, Environmental Monitoring Systems Laboratory. Las Vegas, Nevada. Figure 2. Local site location map, Bridqeton. Missouri. Scale 1:24,000. ANALYSIS SUMMARY The WestlaKe Landfill site is located immediately south of State Route lib in Bridqeton. Missouri. The site occupied 220 acres at its greatest extent (1989). Historical and current aerial photography acquired in 1941, 19S3. 19S8. 1965, 1968. 1971. 1974. 1977. 1979. 1982, 198%. and 1989 was used to perform the analysis. Terrain at the site was generally flat prior to development with some drainage to the southwest. As the site developed, large extraction pits were dug in the southern section of the site, while filling and landfilling were practiced in the northwestern sections. The waste burial activity in this area resulted in a complex terrain with large mounds and enclosed basins. Surface runoff was generally allowed to flow off the mounded areas toward the site perimeter: however, a major drainage channel carried runoff south, off the property, eventually to a pond west of the site. In the north a channel paralleled Route US. eventually leading to a pond on the edge of the site. The site lies within the floodplain of the Missouri River. Although levees are present in the area, it is HKely that the site would be impacted by a 100-year flood event. No wetland habitats are located within or adjacent to the site. The Westlake Landfill site began operation as a limestone extraction facility. Extensive quarry pits were located in the southern corner of the site from 1941 through 1989. From 1941 through 19S3 it appeared that limestone extraction was the prime activity at the facility: however, as time passed the focus of activity appeared to shift to waste disposal. By 1989 no active quarries remained open but some lime processing was s t i l l being done. From 19S3 through 1989 most of the waste disposal activity was concentrated on the west side of the site. A total of 18 wa*te disposal areas were identified. From 19S3 through 196S these primarily consisted of diKed "cells" in which large amounts of sludge and some liquid waste were deposited. From 1971 through 1989 the waste disposal areas were mostly l a n d f i l l s where what appeared to be municipal waste was burled In large mounded areas. A total of 23 solid waste deposits and 9 sludge deposits were associated with the waste disposal areas and in scattered locations throughout the site. A total of 2S significant stains were noted within the site. Most of these were the result of liquid waste dumping in pits or on the ground surface. Some of this liquid was noted outside the site in 19S8. Liquid waste was also disposed of In an unllned lagoon from 196S through 1974. Between 1979 and 1982 a liquid waste treatment complex was constructed In the southern part of the site. A white residue was associated with this complex. Discolored soil areas were noted in 1962 and 1989. Pools of suspected contaminated standing liquid were also present In 1989. Leachate breakouts were visible in 197* and 1989. Throughout the analysis period drainage from the site was unraanaqed and ponds north and west of the site were vulnerable to contamination. o Ho ~ W W L< m u o 3 w w &• o T3 2 4» ao • •* C. «*J w T) -*- e .^i a- — c. u 0) 3 C cr (- U —' o to 10 >
BOUNDARIES AND LIMITS
Figure 3. WestlaKe
MAY 13, 19S8
The 19S8 photography (Figure S) shows continued expansion of the site. The
amount of waste disposal activity present has also increased. Potential
environmental hazards arc:
WD 2 : This area is located immediately east of WD 1 and is also the scene
of sludge/solid waste disposal. The area is located in a
depression; however, it appears that some liquid from this area has
escaped and accumulated along the west side of the site.
WD 3: This waste disposal area is a landfill where waste has been buried.
Staining on the landfill surface (ST-4). is the result of liguid
dumping on the f i l l surface.
Liquid Waste-1: This is a pool of darK liquid waste material that has been dumped on
the ground. Staining at (ST 3) is associated with this liquid
Liquid Waste-2: Extensive amounts of liquid at this point appear to have been spread
on the ground surface. Runoff from this area is to the southwest
corner of the site.
Liquid Waste-3: A small amount of waste Is visible at this point. It is very
similar in appearance to the waste at liquid waste-2. It Is located
on the opposite side of a large mound of sand/gravel. The position
of these two waste accumulations suggests that the gravel has been
deposited on a larger liquid waste pool that includes numbers 2 and
Annotation A: These are pools of liquid that have collected at the foot of the
fill areas at the edge of the site. The northern pools contain
liquid from WD- 2.
Figure S. Westlako Landfill Bite. May 13. 19SB. Approximate scale 1:10.000.
•OUMDARlit AMD LIMITS
1 I 1 I I 1 VINCI
— — — rruovAMA
THAMyOBT ATIONAJTI LITY
l i l t KAILHAT
*J^ (TAMMHO IIOOIO
MOUMMD MATtlM Al
NT HOMZOWTAL TANK
VTASTf OMKMAL A«U>
OCTOBF.R 10. 196S
Expansion of the site to the northwest is noted on the 196S photograph (Figure
6). A new extraction area is now present along State Route 115. Activity at the
site is increasingly devoted to waste disposal, primarily on the west side.
Potential environmental hazards are:
WD-4 7: These are unlined sludge/solid waste disposal cells which are
surrounded by dikes. Numerous mounds of solid material are present
in each of the cells. Pools of liquid waste (liquid waste S) are
also visible in two of the cells (WD-4 and WD-S). Mounds of a
lighter toned solid waste material (SW-1) are also located in WD-4.
WD-B: This extensive area is the scene of sludge/solid waste disposal.
The area is uncontained and liquid from this area flows north to a
depression near the edge of the site.
WD-9: This is a landfill. An accumulation of solid waste (SW-3) is
visible at the north end of the area.
Liquid Waste-4: Three pools of liquid are visible among the solid waste at SW-2.
These pools are on bare ground.
Liquid Waste-6: A pool of dark liquid is noted at this point.
SW-2: This is probably the same material that is noted at SW-1.
Annotation B: This is a deep liquid waste disposal pit. It does not appear to be
lined and significant amounts of liquid are present.
LG-1 & 2: Two new waste lagoons have been added to the site at this point.
These are unlined and large amounts of liquid are present.
ST-S & 6: These are probably fuel or oil stains and are located in the main
processing areas of the facility.
Annotation C: These are sections of roadway which have been oiled for dust
In addition, the settling ponds now present near the center of the site are
associated with limestone processing and no waste disposal is evident.
NT HOMZOMTAI. TANK
FT MtUBUftf TANK
Fiquce 6. West laKe Landfill site. October 10. 196″>. Approximate scale 1:10,200.
HAHCH 7. 1968
Figure 7 shows a consolidation of waste disposal areas in the northwest part of
the site, with only three waste disposal areas remaining active. Increased depth
and extent of the extraction pits are also noted. Potential environmental hazards
WD 8 : The appearance of this area has not changed significantly since
196S. A stream of unidentified liquid flows through this area.
WD-9: This area has been expanded both to the north and to the south. Two
large deposits of solid waste (SW S and 6) are present near the edge
of this landfill. The waste in these two deposits shows a dark
tone, suggesting that it is different than the waste that was
previously observed at this area.
WD-10: This is an extensive new landfill which covers the area where WD-4
through 7 were located. Three deposits of solid waste (SW-4). are
noted near the working face of this landfill. This waste shows a
lighter tone similar to the tone shown at SW-1 and 2.
Annotation B: The deep pit previously noted at this point is still an active
liquid waste disposal point. Staining at ST-8 is associated with
this disposal process.
LG-1: The two unllned lagoons previously noted have been cor.bined into one
larger lagoon. A dark slick is visible on the surface.
ST-7: Three darK stains in this area are the result of llguld waste
ST-9: These dark stains are associated with the liquid disposal at LG-1.
•OUNOAMIIS ANO LIMIT*
I 1 I FIMCf
—— – fTUOYAMA
f LOW IX MOTION
S S S S X VtMCLI ACCUi
l i l t RAILWAY
*y^ tTUdUO LKXMO
SL rrAMomo Liomo
F i g u r e 7. WostlaHe L a n d f i l l s i t e . Match 7. 1968. A p p r o x i m a t e scale 1:7,800.
MOUMOf O MATIIUAL
WAfTI OnXXAL AMA
HAY «. 1971
Figure 8 shows continued expansion of the site to the northwest along State
Route 11S. Large amounts of f i l l have been deposited in this area. Part of the
southern entrance to the site has been fenced. Potential environmental hazards are:
WU-10: This area remains active and the topography has not changed
significantly since 1968; however, increased amounts of liguid waste
and staining are visible (liquid waste 7 and 8. and ST-7). The
material at liquid waste-7 has a thick viscous appearance. Material
at the western pool of liquid waste 8 is the result of numerous
small disposals while the source of the liquid in the eastern pool
is not apparent. ST-7 is also associated with numerous small liquid
WU-11: This is a very large deposit of 1ighter- toned solid waste which is
being used to fill in a low area adjacent to WD 10. A pool of
liquid at the foot of this landfill (liquid waste 10) may also
contain accumulated precipitation.
WD-12: This disposal area shows a light tone. The solid waste in this area
is also light toned. ST-10 is a dark toned feature which is the
result of one liquid dumping event.
LG-1: The liquid in this lagoon is clearer than in 1968.
ST-9: The extent of this staining is greater that in 1968.
SW-8: A mound of mixed solid waste is located on the ground at this point.
ST-11 & 12: These stains are the result of isolated liquid material spills in
the f i l l areas along the adjacent road.
In addition, a large pit can be seen east of WD 12. A crane is visible at this
pit which contains a significant amount of liquid: however, no waste disposal
activity can be identified. Drainage along the northern edge of the site has been
altered such that a pond of accumulated runoff has formed. The locations of ST-11
and 12, and SW 8 along with f i l l activity in the northern part of the site suggest
that this area is an old landfill.
if «r«* w
BOUNDARIES AND LIMIT*
F i g u r e 8. WestlaKe L a n d f i l l s i t e . May 4 . 1971. A p p r o x i m a t e scale 1:10.400.
I I I 1 MNCI
HOW ZONTAL TANK
vioi TATKX rrnf m
HAITI OIVOCAI. ARIA
0 0 c *~
< U) ^*- cr 0 o p rt 3" ift tnCr i ton (ft o pto *— ^ n Ift to CO •O (ft to Q. O 3 rt 3" (ft -3 0C 3a H ._) 3" CA to •o •a (» to^tn 0 cr (ft tn ^~ c a *o 0^ to30 rt 3- (ft a, to 3T 3t o (ft to C3- o 3- ^*- tn cr h— 3 O UJ to H r^ ; tn ^f to *" 3m T3nO cr to cr h< (ft3t o 3 f*t O 3 «: to tn rt cr c n to **• 3 31 CO f 0 rt 2 3" C - 3 CO (ftm •- o 0 C o tn to rt g ^ O O C p p - Q. cn 0 CD0 >rf-
to >- •o »-•
•< e rr to to cn (ft (ft O to n p o a. c *^ >^*
3″ < (ft •— in TJ *-- rt »-- Q C h-. p nP " ^ 3- U) cn —. a, 0 •"! O (ft to to r-t . Qa. C/l *-- o P 3 ift r» 3" ^- (ft Kc a. *"* H y) C £ o >c d.
s8s1 5i !k I 3
I! ni-I *ii Mi i!
a cj o; o i
I I1 5* 53 r ! ii li If I I 5
APRIL 8. 1977
Fiqute 10 shows some change at the site. Potential environmental hazards are:
WD-11: The active portion of this disposal area has shifted to the west.
Deposits of solid waste (SW-11) and sludge are present. Significant
amounts of darK sludge (SD 2) have been spread into a low area
WD 13: This new landfill disposal area contains both solid waste (SW-12).
and sludge (SD 1). The sludge in this area is spread in a very thin
layer over the landfill surface and the solid waste lies at the foot
of t he slope.
WD-14: This is another new waste disposal area. Deposits of solid waste
and sludge (SW-13 and SD-3) are being bulldozed into a pit at the
foot of the large fill area.
LG-1: No significant change is noted at this lagoon.
SD-4: Three deposits of dark-toned sludge are located on the top of a
large mound at this point.
ST-16: Five dark stains are noted on the ground surface within WD-11.
ID. f t h i n
————•—• STUDY AREA
•»- FLOW DIRECTION
-. -«-»- – INOETE MMNATI
SI STANDING LIQUID
HT HOWIZONTAL TANK
PT PIIEMUME TANK
VT VERTICAL TANK
WASTE DISPOSAL AMEA
Figure 11. Westlake Landfill site. July 26. 1979. Approximate scale 1:7.800
MARCH 7, 1982
Fiqute 12 provides the first conventional color photography of the site. Waste
disposal activity appears to have decreased. An extended section of the southeast
boundary has been fenced since 1979. A new liquid waste treatment facility has also
been constructed in the southern part of the site. Potential environmental hazards
SW-1S: These deposits of solid waste are located in the same area as
deposits observed in 1979.
ST-18: These dark stains are located in an area of cement sludge disposal.
They may be related to vehicle activity in this area.
LG-3 & 4: These are two liquid waste treatment lagoons. No liner is visible
at either of them. These treatment lagoons are associated with an
aeration pond and a processing plant. An apparent by-product of
this processing is a white residue which has been allowed to
accumulate nearby on the surface of the mound where they are located.
Annotation D: These are two areas of discolored ground which show a rust color.
The nature or cause of this discoloration is not apparent.
LG-5: This large treatment lagoon is located outside the main site area;
however, it appears to be part of the treatment complex which also
contains LG-3 and 4. No liner is visible at this lagoon and no
discharge is visible.
LG-6: This new lagoon appears to have been constructed such that it would
receive material dumped from the nearby access road. It is unlined.
In addition, extensive new excavations are observed south of the site,
not appear to be part of the main landfill site area.
BOUNDARIES AND LIMITS
>_»_•_ FENCED SITE
I I I I I 1 FENCE
——————— STUDY AREA
*• FLOW DIRECTION
HT HORIZONTAL TANK
PT PRESSURE TANK
VT VERTICAL TANK
CA CLEARED AREA
SOL ID WASTE
WASTE DISPOSAL AREA
APRIL 16, 1985 (1 OK 2)
Figure 13 shows the northern part of the site. Waste handling and disposal
continues to be visible. Potential environmental hazards are:
SW-16: These two deposits of solid waste remain largely unchanged since
SW-18 & 19: These deposits of waste are similar in appearance to the material at
SW-20: This solid waste is being prepared for burial in an old extraction
ST-19: A dark-toned stain at this point appears to be the result of a
liquid material being spread on the soil surface.
ST-20: This is an area of dark stained soil. Standing water is also
present in this area. The source of this discoloration is not
ST-21: Staining at this point is probably the result of small spills from
heavy equipment which is stored in the area.
ST- 22 & 23: These are dark liquid waste disposal stains.
•>»>•• •!••••« 1111
? 5 «• » *
g | 2 i i g || 3| |K ‘ 9 ?
s> 5g 5 12 1i • |i hE |I i|8i g|| |,
2 * S r m ?”*-.*
APRIL 16, 1985 (2 OF 2)
Figure 14 shows the southern part of the site. Little change is evident in
this area since 1982. Potential environmental hazards are:
LG-3 & 4: No change is visible.
LG-5: The level of liquid in this lagoon is slightly lower than in 1982.
Residue: The amount of this material present appears to be less than in 1982.
SD-9: A mixture of sludge and solid waste has been spread over a fairly
extensive area since 1982. Runoff from this point is toward the
perimeter of the site and a nearby stream.
LG-6: No change is noted.
The aeration pond located at the treatment complex is currently empty and is
probably undergoing some maintenance activity.
BOUNDARIES AND LIMITS
— – UNFENCEDSITC
I I I I I I PENCE
——.———— STUDY AREA
• – — – ORAINAOE
•*- FLOW DIRECTION
i TRANSPORTATION /UTILITY
= r = = r VEHICLE ACCESS
I • \ > RAILWAY
Figure 14. West lake
Landfill site, April 16, 198S (2 of 2). Approximate scale
HT HORIZONTAL TANK
PT PRESSURE TANK
VT VERTICAL TANK
CA CLEARED AREA
DC DISTURBED GROUND
SW SOLID WASTE
VS VEGETATION STRESS
WO WASTE DISPOSAL AREA
APRIL 20. 1989
Figure IS shows continued waste disposal activity in the north and south parts
of the site. Potential environmental hazards are:
WD-18: Solid waste (SW-21) is being buried at the northern edge of this
mounded landfill area. The lack of vegetation on the landfill
surface suggests recent activity throughout this disposal area.
SW-20: Increased amounts of solid waste are being buried in the old
extraction pit since 1985. A heavy dark stain (ST-24) in this same
location is the result of liquid waste disposal.
LG-3-5: No significant change is noted.
ST-25: This dark stain appears to be the result of liquid waste disposal
and not any leakage from the nearby lagoons.
Annotation D: These are areas of discolored soil. The ground in these areas shows
a strong rust hue. The source of this discoloration is not apparent.
Annotation E: These are pools of dark liquid. They probably consist largely of
standing water; however, their color suggests that there may be some
contamination present also.
LG-6: Most of the diking around this lagoon has been broken down since
1985 although liquid remains present.
BOUNDARIES AND LIMITS
*_!_>_ FENCED SITE
«___•. UNFENCCD SITE
I I I I 11 FENCI
—— ————• STUDY AREA
•»- FLOW DIRECTION
——•-.—— INDETE RMINATE
TRANSPORTATION /UTI LITY
= = = = = VEHICLE ACCESS
| | ) l RAILWAY
Westlake Landfill site, April 20, 1989. Approximate scale 1:9,900.
WASTE DISPOSAL AREA