NCD001810365_19880809_Martin-Marietta Sodyeco Inc. (Clariant)_FRBCERLA RA_Work Plan CERCLA Ground-Water Recovery Systems-OCR

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LAW ENVIRONMENTAL
WORK PLAN
CERCLA GROUND-WATER RECOVERY SYSTEMS
MT. HOLLY PLANT
CHARLOTTE, NORTH CAROLINA
LEI JOB -0. 56-8574
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LAW ENVIRONMENTAL. INC.
431 MINUET LANE
August 9, 1988 CHARLOTTE, NORTH CAROLINA 28217
P.O. BOX 240674
Sandoz Chemicals Corporation
P. O. Box 669246
Charlotte, North Carolina 28266·
Attention: Mr. Dinesh Shah
Subject: Work Plan
Gentlemen:
CERCIA Ground-Water Recovery Systems
Mt. Holly Plant
Charlotte, North Carolina
LEI _Job No. 56-8574
CHARLOTTE, NORTH CAROLINA 28224-067 4
704-527-6717
The accompanying Work Plan is submitted for your consideration. It is
intended to be responsive to the accomplishment of the project objectives as
stated in the RI/FS.
If you have any questions concerning the Work Plan, please contact us.
Attachments
BBS/CRM/JNS:clp
cc: Mr. William Archer
Sincerely,
IAW ENVIRONMENTAL, INC.
~11-~
Bernard B. Schumak
Hydro geologist
;R~%~I.T.
Environmental Engineer
u--_...,,,//~
mith, P.E.
Vice President
Services Manage~
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FRANK B.
ENGINEERS
CHARLOTTE, N.C.
HICKS ASSOCIATES, INC.
SURVEYORS PLANNERS
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CHARLOTTE, N.C.
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EXPLANATION
GROUND-WATER RECOVERY WELL
OBSERVATION WELL
MONITORING WELL
---ZONE OF CAPTURE
RECOVERY WELL PIPE ( 1" DIA. PVC),
□ CERCLA AREAS
Ciil
□
MANHOLE W !CLE ANO UT
EXISTING ALKALINE SEWER
JUNCTION BOX
cXISTING WASTE WATER SUMP
CHECK VALVE
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
SITE TOPOGRAPHY MAP
SANDOZ CHEMICAL CORPORATION
JOB NO 56-8574 DRAWING 1
SANDOZCHEMIULS 0 s...leaCII I 9 c.,.....tie■
PO BoJo: 669246
Chorlone, North Carol1ria 28266
s-.ln01111I I c.,..._tie■
PO Box 669246
Chmlonf!, North Cmnl1ria 28266
QsomECO
QsomECO
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WORK PLAN
FOR
·cERCLA GROUND-WATER RECOVERY SYSTEMS
Prepared for
SANDOZ CHEMICALS CORPORATION
CHARLOTTE, NORTH CAROLINA
by
LAW ENVIRONMENTAL, INC.
CHARLOTTE, NORTH CAROLINA
LEI Job No. 56-8574
August 9, 1988
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TABLE OF CONTENTS
Page
BACKGROUND INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
RECOVERY WELLS ...... ,' .... ; . '· ........................................ ; . . . . 1
Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Drilling Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Soil/Partially Weathered Rock (Shallow) .............................. 3
Fractured Bedrock/Bedrock (Deep)..................................... 3
Installation........................................................... 3
OBSERVATION WELLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Locations ...... · . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Drilling Methods .............................. : ......... ,. . . . . . . . . . . . . . . 5
Installation .............................................. ,............ 5
MONITORING WELLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Drilling Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation........................................................... 6
HANDLING OF RECOVERED GROUND WATER ....................................... 7
Estimated Volume of Ground Water Recovered ............................. 7
Ground-Water Recovery System........................................... 7
QA/QC DURING WELL INSTALLATION AND CROSS-CONTAMINATION PREVENTION ........ 8
SURVEYING OF WELLS AND SEWER CONNECTION LINES ............................ 8
DISPOSAL AND DISCARDED MATERIALS ......................................... 8
DEVIATIONS OF WORK PLAN FROM FS REPORT .................... : .............. 9
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Figure
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13.
LIST OF FIGURES
Site Topography Map, Sandoz Chemicals Corporation
CERCI.A Areas A and B Location Map
CERCI.A Area C Location Map
CERCI.A Shallow and Intermediate Area D Location·Hap
CERCI.A Deep Area D Location Map
CERCI.A Area E Location Map
Standardized Well Pattern for Recovery Systems
Proposed Recovery Well Installation for Shallow and Intermediate
Zones
Proposed Recovery Well Installation for Deep Zones
Proposed Observation Well Installation
Proposed Monitoring Well Installation (In Soil)
Proposed Monitoring Well Installation (In Rock)
Details of Typical Recovery Well Sewer Line Hook-up
and Manhole
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Table 1.
Table 2.
LIST OF TABLES
Recovery, Observation, and Monitoring Well Information
Estimated Maximum Yield from Recovery Wells in the CERGLA Areas
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BACKGROUND INFORMATION
Sandoz Chemicals Corporation has performed a remedial investigation/
feasibility study (RI/FS) at the CERCLA areas at their Mount Holly, North
Carolina facility. ·The:.: FS, dated July 1987 presents recommendations for
containment and remedial technologies for ground-water and soil contamination at
the Mount Holly site.
The FS considered six strategies for containing and reducing the mobility,
toxicity, and volume of contaminants in ground water and soil at the five CERCLA
areas, and their costs. For ground-water remediation, the selected technology
is to recover t_he contaminated ground water and pump it to a RCRA biological
wastewater treatment plant on the Sandoz site.
The U.S. Environmental Protection Agency has issued a record of decision on
the Sandoz Chemical site. Ground-water recovery and treatment are required as
part of the approved remediation program. Sandoz has expressed to Law
Environmental their wishes that the ground-water recovery system outlined in the
project FS be detailed and adapted to the site-specific conditions.
RECOVERY WELLS
A total of eleven ground-water recovery wells will be installed to contain
and reduce the mobility and volume of ground-water contaminants at the Sandoz
Chemicals site. The locations of the recovery wells to be installed at each
CERCLA area are illustrated on Figures 1 through 6. Table 1 presents the
estimated depths, screened intervals, exposed formation material, and aquifer
zone of interest of each recovery well.
methods are described below.
1
The . construction and installation
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Locations
The ground-water recovery ·wells are located in a standardized pattern for
each CERCLA area (Figure 7). The recovery well spacings will form capture zones
from about 340 to 550 feet wide.
A total of two recovery wells will be drilled for CERCLA areas A and B. The
wells will be placed downgradient of the closed landfills as shown on Figures 1
and 2. The recovery wells will be placed approximately 230 feet apart and will
intercept ground water from the intermediate aquifer zone in a capture zone
estimated to be about 550 feet wide. The shallow and deep aquifer zones will
not be pumped in CERCLA areas A and B. The shallow aquifer zone is
uncontaminated, .and the deep zone contains chlorobenzene and o-dichlorobenzene
in concentrations below ARAR's.
For CERCLA area C, two ground-water recovery wells wi_ll be installed in the
shallow aquifer zone. The recovery wells will be downgradient to the south to
capture contaminants before they enter Long Creek. The recovery wells will be
spaced approximately 200 feet apart and will have an estimated capture zone
width of 500 feet. The shallow aquifer zone contains approximately 98 percent
(by mass) of the organic contaminants from area C. The intermediate and deep
aquifer zones have insignificant contamination.
A total of five ground-water recovery wells will be installed for CERCLA
area D (Figures 1, 4 and 5). Two recovery wells will capture ground water from
the shallow and intermediate aquifer zones, and three wells from the deep
aquifer zone. The zones of capture to be established by the wells will be
approximately 350 feet wide for all zones. The two shallow recovery wells will
be about 130 feet apart and placed downgradient to the west, between area D and
the Catawba River. The three deep recovery wells will be installed
approximately 110 feet apart, also downgradient to the west.
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Two ground-water recovery wells will be installed in area E (Figures 1 and
•6). The recovery wells will be drilled into the intermediate aquifer zone,
downgradient towards the northwest, and approximately 150 feet apart. The zone
of capture established by the wells is estimated to be about 340 feet wide. The
recovery wells will be ·located to intercept ground-water flowing along a
fracture zone paralleling the surface drainage.
Drilling Methods
Soil/Partially Weathered Rock (Shallow); Borings will be advanced through
the overburden soil and weathered rock by either mechanically twisting a
continuous flight hollow stem steel auger into the soil, or rotary wash-drilling
techniques using potable water.
Fractured Bedrock/Bedrock (Deep): Refusal materials are those that cannot
be penetrated with the soil drilling methods described above. Refusal, thus
indicated, may result from soft weathered rock, boulders, thin rock seams, or
the upper surface of sound continuous rock.
Wells installed into rock and the transitional zone will be constructed by
drilling an approximately 6-inch diameter borehole with "down-the-hole hammer"
air drilling techniques. Any required drilling water will be obtained from an
approved on-site source. The borehole will be drilled to the top of the zone of
interest.
Installation
The shallow (and intermediate in area D) recovery wells (Figure 8) will
consist of a six-inch diameter PVC pipe installed in an approximately 10-inch
diameter borehole. The well.will extend to the desired level and will have a
slotted well screen. Coarse sand backfill will be placed around the outside of
the pipe to approximately 2 ft above the water table. The remainder of the
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annular space will be backfilled with soil.
installed at the surface.
A cement grout collar will be
The intermediate (except in area D) and deep recovery wells (Figure 9) will
consist of installing a 6-inch diameter PVC pipe into an approximately 8-inch
diameter borehole and grouting the annular space between the pipe and the
borehole with a cement~bentonite mixture . A 6-inch diameter hole will be
drilled through the grouted pipe and 10 ft into the rock formation.
A submersible pump will be placed near the bottom of the well. The
discharge from the recovery well will be routed through a pipe to the on-site
waste treatment plant. Estimates of average discharges from recovery wells and
zones are listed in Table 2.
The pumping wells will be evaluated as to whether the method of installation
and equipment utilized are satisfactory.
of influence will be evaluated. This
In addition, the pumping rate and zone
information will be used to design
additional recovery wells if additional ground-water remediation is deemed
necessary.
OBSERVATION WELLS
Locations
A total of 13 observation wells will be installed at the subject site.
For all CERCLA areas except the deep zone in area D, three observation wells
will be installed. The observation wells will be installed 50 to 100 feet in
line with and outside the recovery wells, approximately at the outer lateral
limits of the capture zone. The third observation well will be located slightly
upgradient and between the recovery wells. Four observation wells will be
installed in the deep zone of area D, two located upgradient and between the
three recovery wells, and two slightly outside and downgradient of the two
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outermost recovery wells. The depths of the observation wells are listed in
Table 1.
Drilling Methods
The methods · used to drill the observation wells will be the same as those
previously described in the recovery wells section.
Installation
Observation wells (Figure 10) will be installed by inserting 2-inch PVC
plastic pipe to the desired depths. A closed end slotted portion of PVC pipe is
attached to the bottom of the plastic pipe to allow subsurface water to enter
the observation well. Clean sand is backfilled around the bottom slotted
portion of the well. The remainder of the hole is backfilled with soil, using a
bentonite or mortar cap to seal out surface water. The top of the PVC pipe will
have a removable cover to seal out rainwater.
MONITORING WELLS
Locations
Two monitoring wells, as shown in Figures 1 through 6 will be installed for
each CERCLA area. The monitoring wells will be placed about 150 feet outside of
and in line with the recovery wells.
listed in Table 1.
The depths of the monitoring wells are
The purpose of the monitoring wells installed in the contaminated zones is
to make sure that the contaminated ground-water from the CERCLA areas is not
escaping the zone of capture of the recovery wells.
Water quality wells installed during the RI will be also used as monitoring
wells during ground-water remediation. Existing well WQ-SA will be utilized as
a monitoring well for the uncontaminated deep aquifer zone in CERCLA areas A and
B. Existing well WQ-29 will be used .as a monitoring well for the uncontaminated
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intermediate aquifer zone in area C, and existing well WQ-33 will be used as a
monitoring well for area D. For area E, the uncontaminated shallow and deep
zones will be monitored using existing well WQ-32.
Drilling Methods
The methods used to drill the monitoring wells will be the same as those
previously described in the. recovery wells section.
Installation
The ground-water monitoring well construction in. soil or gravel will include
inserting a length of 2-inch diameter PVC pipe into the borehole (Figure 11). A
10-ft section n.ear the bottom of the pipe will be a manufactured well screen
with a 0.010-inch wide slots. An approximately 2-fc long solid tail pipe with a
centralizer will be placed below the well screen. After the pvc pipe is in
place, clean sand backfill will be placed around the outside of the pipe to
about 2 ft above the well screen. A bentonite seal of 2-ft thickness or more
will be placed on top of the sand backfill to seal the monitoring well at the
desired level. The borehole will then be grouted to a level near the surface
with a cement-bentonite grout. A lockable cover will be placed over each well
and will be grouted in at the surface. Monitoring well installation details are
illustrated on Figure 10.
Monitoring wells installed into rock (Figure 12) will be constructed by
drilling an approximately 6-inch diameter borehole, with air drilling
techniques. The borehole will be drilled to the top of the zone of interest. A
4-inch I.D. carbon steel pipe will be grouted into place (annular space between
pipe and borehole) with a cement-bentonite mixture. After the grouted pipe has
set at least 12 hours, a 3 7/8-inch diameter hole will be extended at least 10
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feet into the rock formation. The monitored zone is the 10 feet of unscreened
rock at the bottom of the well.
HANDLING OF RECOVERED GROUND WATER
Estimated Volume of Ground·Water Recovered
Approximately 20 gpm of contaminated ground-water is expected to be
recovered by the completed recovery well system_ and piped to the biological
wastewater treatment plant. Table 2 lists the flows of ground water expected
from each zone from the five CERCLA areas. The maximum rate of flow of ground
water from a single zone in an area is approximated to be 4 gpm from the shallow
and intermediate aquifer zones of area D.
Ground-water Recovery System
A schematic of the ground-water recovery system is illustrated on Figure 1.
Ground-water will be pumped from the recovery wells to existing alkaline sewer
lines which route wastewater to the biological wastewater treatment plant. The
pipe system and pumps are designed to handle the maximum expected flows from the
CERCLA areas as listed in Table 2.
The pipe will consist of l" inside diameter PVC. Pipe lengths greater than
400 ft will have a manhole with a cleanout fitting. Details of the recovery
well and manhole are illustrated on Figure 12. To eliminate back pressure
possibilities, check valves will be installed wherever recovery well discharge
pipes join into a single discharge line.
The ground-water recovery pumps will consist of 1/3 horsepower submersible
pumps rated at 4 gallons per minute. The actual flow rate will be adjusted as
needed for each recovery well by the use of flow-control valves.
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QA/QC DURING WELL INSTALLATION AND CROSS-CONTAMINATION PREVENTION
The drilling rig and tools will be steamed cleaned before beginning each
monitoring well to prevent cross-contamination between wells. Bentoni te seals
will be used in the monitori.ng wells to isolate screened intervals and to
prevent hydraulic connection and cross-contamination between aquifer zones.
Lockable caps will be placed on observation and monitoring wells to deter
tampering and vandalism.
SURVEYING OF WELLS AND SEWER CONNECTION LINES
A registere<:1 surveyor in North Carolina will survey the horizontal and
vertical locations of the wells. All newly installed wells will be measured to
an accuracy of ±0.01 foot for elevations (with respect to a USGS Benchmark) and
to an accuracy of one foot for horizontal locations. Constructed lines routing
the recovered water to the plant sewer system will also be surveyed.
DISPOSAL OF DISCARDED MATERIALS
Materials generated and discarded during construction Df the remedial
activities will be handled as follows:
Soil: Soil brought to the surface during the drilling process (auger
cuttings) will be used to backfill the borehole from which they came. These
soils will not be transported off-site.
Ground-Water: Ground water removed from the wells during well construction
or development will be placed in drums on trucks and transported to the on-
site wastewater treatment facility for treatment.
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Rinse Water: Washing and rinsing of the drilling equipment will be
performed in a designated area with containment facilities that route the
collected water to the wastewater treatment facility.
Miscellaneous Non-Hazardous Debris: Discarded packaging (grout and
bentonite bags, equipment· and supplies wrapping, etc.) and general trash
generated by the field investigative activities will be deposited in the
plant's trash collection system. These materials are non-hazardous.
DEVIATIONS OF PROPOSED WORK PIAN FROM FS REPORT
The above Work Plan followc the main features of the ground-water
remediation plan recommended in the RI/FS. The well locations have been
adjusted to accommodate topography and local conditions at the CERCLA areas at
the Sandoz Chemicals Corporation.
Any additional deviations deemed necessary during construction and
installation of the ground-water recovery system will be shown on the as-
constructed drawings and, if appropriate, discussed with EPA.
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RECOVERY, OBSERVATION ANO MONITORING WELL INFORMATION
D Approx.
Screened
Approx. Interval Type Material
D CERCLA Depth Depth Depth Diameter Exposed
Area Wei I No. Zone · (Ft.) ( Ft. l (In.) to Screen
D
A+B R-1" Intermediate 125 115 125 6 Rock
R·2 " 125 115 125 6 Rock
OW-1 " 50 40 50 2 PWR
OW-2 " 50 40 50 2 PWR
D OW-3 " 50 40 50 2 PWR
MW-1 " 125 115 125 2 Rock
MW·2 " 125 115 125 Rock
E C R·3 Shallow 20 10 20 6 Soil
R-4 20 10 20 6 Soil
OW-4 20 10 20 2 Soil E OW-5 20 10 20 2 Soi t
OW-6 20 10 20 2 Soil
MW-3 20 10 20 2 Soil
D HW-4 20 10 20 2 Soil
D R-5 Shat low and 30 5-15 + 25-30 6 Soil/Gravel
E Intermediate
R-6 " 30 5·15 + 25-30 6 Soil/Gravel
MW·5 " 30 5·15 25-30 2 Soil/Gravel
MW-6 " 30 5·15 25·30 2 Soil/Gravel
m R-7 Deep 85 75 85 6 Rock
R-8 " 85 75 85 6 Rock
m R·9 " 85 75 85 6 Rock
OW-7 Shallow 20 10 20· 2 Soil
OW-8 " 20 10 20 2 Soil
OW-9 " 20 10 20 2 Soil I OW-10 " 20 10 20 2 Soil
MW-7 Deep 85 75 85 2 Rock
MW-8 " 85 75 85 2 Rock
m E R-10 Intermediate 100 85 100 6 Rock
R-11 " 100 85 100 6 Rock
E OW-11 Shallow 20 10 20 2 Soil
OW-12 " 20 10 20 2 Soil
OW-13 " 20 10 20 2 Soil
MW-9 Intermediate 100 85 100 2 Rock I MW·10 " 100 85 100 2 Rock
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CERCLA Area(s)
and Aquifer Zones
and B, Intermediate
Shallow
Shallow
Intermediate
Deep, Residuum
Deep, PIJR/ F ractur_ed
Rock
Deep, Rock:
Intermediate
TABLE 2
ESTIMATED MAXIMUM YIELD FROM
RECOVERY ~ELLS
IN THE CERCLA AREAS
Estimated Flow
Rate, gpm
2.5
0.3
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3.3
0.5
0.2
0. 1
2.0
Estimated Number
Wells in Area
2
2
2
2>b
3
3>c
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2
TOTAL 11
of Total Estimated Flow
Rate from Wells, gpm
5.0
0.6
1.2
6.6
1.5
0.6
0.3
4.0
19.B
(Approx. 20 gpm)
a -Estimate based on pump tests conducted throughout the Sodyeco· plant site and the
hydraulic conductiyities of the area where the pump test was conducted relative to
the hydraulic conductivities of the CERCLA areas.
b - A total of two wells are screened in the shallow and intermediate zones of Area·D
(i.e., same well screened in both zones).
c -A total of three wells are screened in the residuum, partially weathered/fractured
rock, and deep zones of Area D (i.e., same welt screened in these zones).
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MW-1 ...,_
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.OW-1
0 200 SCALE...,_ ___ ,_FEET
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LEGEND
I ' APPROXIMATE LIMITS OF CERCLA AREA
I
APPROXIMATE LOCATION OF OBSERVATION WELLS
f
APPROXIMATE LOCATION OF RECOVERY WELLS
♦ APPROXIMATE LOCATION OF MONITORING WELLS
--. APPROXIMATE WIDTH OF CAPTURE ZONE
© CHECK VALVE
181 EXISTING ALKALINE SEWER Jlrl'ICTION BOX
---RECOVERY WELL PIPE (1" DIA. PVC)
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
CERCLA AREAS A AND B
LOCATION MAP
JOB NO. 56-8574 FIGURE 2
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CJ
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ow-401 a 1
I a
MW-3
'
(l!)R-3 r . * ~~□-IIWQ-27 Y".-5 .
I O WQ-6 'f'0-28 oC-3-2
'
WQ-t C-3-Se oC-3-3 WQ 91 •c-3-1 W 29D C-3-411 -4
ow-so, C-2-2 8 2
~
• C-1-2B - -. ♦
MW-4
SCALE 1' = 200'
-2-1 -1-1 D C-2-50 ~-1-3 p,ooB C-1-5 C-1-4 =
AREA C
N
()
I EXPLANATION
e GROUND WATER RECOVERY I , O OBSERVATION WELL l8l EXISTING ALKALINE
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
. SEWER JUNCTION BOX ♦ MONITORING WELL -ii-MANHOLE
I ~ ---ZONE OF CAPTURE W/CLEANOUT
::i I I CERCLA AREA ® CHECK VALVE
CERCLA AREA C
LOCATION MAP
~ -•-'-RECOVERY WELL PIPE (1" DIA. PVC) JOB NO 58-8574 FIGURE 3 1i t:..:.=~:.::.:..:::::.:.:..::.:::.:.:...::;;,,;.,;,.;.;_~~::,;:,:.;:_....a.,,;.,;,;,.........,~~-~c
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0 u
I w ~ ~ ~ z ~
w z ~
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G
~ ,f .
It~ ,,.-
11 ~/ r-..,
\"-~· '
I IU I 33B · 0 / ,,,.--, '\
'-.JL / /. \\ I . -:;-(, ,I
♦
\'-.!w.5 i;~7 -. OW-10 MW-6
~~~ Jh
~ 0 200
SCALE ------~FEET
LEGEND
rs:; <E:il APPRox1MATE uMITs oF cERcLA AREA
•
0
♦
□
APPROXIMATE LOCATION OF RECOVERY WELLS IN SHALLOW
AND INTERMEDIATE (GRAVEL) AQUIFERY ZONES
APPROXIMATE LOCATION OF OBSERVATION WELLS
IN THE SHALLOW AQUIFER ZONE
APPROXIMATE LOCATION OF MONITORING WELLS
IN SHALLOW AQUIFER ZONE
APPROXIMATE WIDTH OF CAPTURE ZONE
EXISTING WASTE WATER SUMP
RECOVERY WELL .PIPE {1" DIA. PVC)
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
CERCLA SHALLOW AND
INTERMEDIATE AREA D
LOCATION MAP
JOB NO 56-8574 FIGURE 4
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I 0
0
0 u
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w "' ...
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G
~ (")OIL
'\ '°tAN
~ ~ ~
I l
PUMP //
HOUSE
-..-z---=
II
I/
II
(( ~;7 ---.::,__ "
l
0 200
SCALEi-..----..lFEET
LEGEND
Mt @I\!fil! APPROXIMATE LIMITS OF CERCLA AREA
0
•
♦
□
APPROXIMATE LOCATION OF OBSERVATION WELLS
IN.DEEP AQUIFER ZONE
APPROXIMATE LOCATION OF RECOVERY WELLS IN RESIDIUM,
WEATHERED/FRACTURED ROCK, AND IN THE DEEP
(BEDROCK) AQUIFER ZONE
APPROXIMATE LOCATION OF MONITORG WELLS IN DEEP
AQUIFER ZONE
APPROXIMATE WIDTH OF CAPTURE ZONE
EXISTING WASTE WATER SUMP
RECOVERY WELL PIPE (1" DIA. PVC)
--------Fi, LAW ENVIRONMENTAL
. CHARLOTTE, NORTH CAROLINA
CERCLA DEEP AREA D
LOCATION MAP
JOB NO 56-8574 FIGURE 5
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0
0 u w ~ ~ < ~ "" w ~ ...
0
SCALE-----
TO BE ROUTED THROUGH
EXISTING CULVERTS
LEGEND
!J@ \fff!ilif:\i APPROXIMATE LIMITS OF CERCLA AREA
Q APPROXIMATE LOCATION OF OBSERVATION WELLS
0 APPROXIMATE LOCATION OF RECOVERY WELLS
♦ APPROXIMATE LOCATION OF MONITORING WELLS
---APPROXIMATE WIDTH OF CAPTURE ZONE
-~-EXISTING ALKALINE SEWER JUNCTION BOX
RECOVERY WELL PIPE (1" DIA. PVC)
CHECK VALVE
-X --MANHOLE W /CLEANOUT
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
CERCLA AREA E
LOCATION MAP
~OB NO. 56-8574 FIGURE 6
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I 0
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I w 100'
i AREAS A AND B, C, D SHALLOW, AND E
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---•-------•--------•---0 0
/)\ II\ /!\
I 100'
I AREA D DEEP
I
0 u
I w ~ ~ < X 0 w X >-
I
100'
LEGEND
0 OBSERVATION WELL
e RECOVERY WELL
♦ MONITORING WELL
~ DIRECTION OF GROUND-WATER FLOW
CAPTURE ZONE BOUNDARY
WIDTH OF CAPTURE ZONE
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
STANDARDIZED WELL PATTERN
FOR RECOVERY SYSTEMS
JOB NO. 56-8574 FIGURE 7
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PROPOSED RECOVERY WELL INSTALLATION -· FOR SHALLOW AND INTERMEDIATE ZONES
GROUND SURFACE
BENTONITE SEAL------llllf:i
BOREHOLE------li>r.1
WELL SCREEN----+.'lll►_J .. .. . .
PUMP-----+--
.. .. ..
,. PUMP DISCHARGE
►
...
.. . . .. . · . ..
..
DEPTH TO
-TOP OF -SAND
WELL
SCREEN
INTERVAL
TOTAL
DEPTH
OF WELL
A JOB NO. 56-8574 r.,_} LAW ENVIRONMENTAL, INC.1--------------+
CHARLOTTE, NORTH CAROLINA FIGURE 8
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PROPOSED RECOVERY WELL INSTALLATION
FOR DEEP ZONES
WELL COVER
◄ Lo-. -I----GROUND SURFACE°"""\ --
BOREHOLE ____ --4 8" DIA. ' ' -' r-s
' ~
' '\
s lt11-"lvc _____ .. 11 ' ' '\ ~ :::C':;-
' ' ' ~ GROUT----➔•11 ' ~
PUMP------l>ol
BOREHOLE _____ -1>1 6"DIA. -
OPEN FACE,------11'1 ROCK WELL
' ' ' ' ' ~ -
-
PUMP DISCHARGE
'
DEPTH OF PVC PIPE
'
DEPTH OF
OPEN INTERVAL
'
TOTAL DEPT-H
OF WELL
A JOB NO. 55:9574 ~ LAW ENVIRONMENTAL, INC.1------------f
CHARLOTTE, NORTH CAROLINA FIGURE 9
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PROPOSED OBSERVATION WELL INSTALLATION
VENTED PVC CAP
GROUND s-uR""'~""'A""CE-)'--G-R'""'.;"'~-~T~-~:::_:-...,1'.1 ~
'-T _I STICKUP
BORING ~ ~
(G"DIA.)
SDI L ----!lo-
2" PVC PIPE
SAND
PVC SCREEN
DEPTH TO
BASE OF
GROUT SEAL
DEPTH TO TOP
OF SAND BACKFILL
-
TOTAL DEPTH
OF WELL
JOB NO. 56-8574 0 LAW ENVIRONMENTAL, INC. 1--------------1
CHARLOTT!, NORTH CAROLI NA FIGURE 10
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PROPOSED MONITORING WELL INSTALLATION (IN SOIL)
GROUT
SORING
(6"DIA.)
VENTED PVC CAP r:: . T STICKUP
DEPTH TO
BASE OF
GROUT SEAL
-
DEPTH TO TOP
TOTAL DEPTH
Cl' BORING
OF SANO BACKFlLL
SOIL---~
TOTAL DEPTH
OF WELL
2" PVC PIPE
i,,, ~ -~ .
BENTOIIITE SEAL
_____ ,,:•~• ~ THICKNESS OF
BENTONITE SEAL
SAND
PVC SCREEN
T
DEPTH OF
PVC SCREEN
A JOB NO. 56-8574 r..,; LAW ENVIRONMENTAL, IN"~l------------1
CHARLOTTE, NORTH CAROLINA
FIGURE 11
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. PROPOSED MONITORING. WELL
INSTALLATION {IN ROCK)
PVC CAP
GROUT SEAL
6" PVC PIPE
(IF NEEDED)
4" STEEL PIPE--.i
6° DIA. BOREHOLE--i1
STICKUP
DEPTH OF
611 DIA.
PVC PIPE
TOTAL DEPTH
OF WELL
DEPTH OF
4" DIA.
STEEL PIPE
DEPTH OF
OPEN INTERVAL
, ..
GROUND
SURFACE
e JOB NO. 56-8574
. LAW ENVIRONMENTAL, INC.1--------------1
CHARLOTTE, NORTH CAROLINA FIGURE 12
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0 u w ~ ~ 1 ~ w "' ~
i/ ENCASEMENT W /COVER
..,.---l 45° "Y' W /THREADED PLUG
FOR CLEANOUT
1" DIA PVC I I > FLOW ----,'r-_ _.__ ___ ..J__.....;..' -
TYPICAL MANHOLE
GROUND,
, /T 1" DIA PVC PIPE
LOCKABLE CAP--'l ~,-1,1,'--1-l----l---F-:.t::'.:'r-l
8" STEEL---,
CASING COVER
I h~TO POWER SOURCE .
/ (230V SINGLE PHASE)
SURFACE ,,..-----------=kl ? I I
POWER LINE· ~
P~CD~E~~ ~
PUMP SUPPORT -. CABLE
BORE HOLE~~
(10' DIA.)
1.5 FT COVER (MIN)
.,
'-1-----TO ALKALINE SEWER LINE
I
FLOW FROM PUMP
TYPICAL RECOVERY WELL
----=-= ~ '= t ';' ..........
LAW ENVIRONMENTAL
CHARLOTTE, NORTH CAROLINA
DETAILS
JOB NO. 56-8574 IFIGURE 13