HomeMy WebLinkAboutNC0090212_Albermarle Kings Mountain Project_20240325AALBEMARLE& RECEIVED
Kings Mountain Facility
348 Holiday Inn Drive MAR 2 5 2024
Kings Mountain NC 28086
North Carolina Division of Water Quality NCDEQ/DWR/NPDES
Water Quality Permitting Section/ Industrial NPDES Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: Pumping Operation and Monitoring Plan
Albemarle Kings Mountain Mine Project
NPDES Permit NCO090212 (Draft)
1.0 Introduction
Albemarle U.S., Inc. (Albemarle), intends to reopen the Kings Mountain Mine, which produced
lithium from the 1940s through the 1980s and contains one of the few known hard rock lithium
deposits in the United States. The Kings Mountain Mine is in Cleveland County, North Carolina,
adjacent to the city of Kings Mountain on the Interstate 85 transit corridor, approximately thirty
miles west of the city of Charlotte.
In 1993, exploration and mining operations ceased, and an open pit lake started to form due to
rebounding groundwater. During the groundwater recovery period (approximately 1994 to
present), some water was sporadically pumped from the Kings Mountain pit lake to an adjacent
aggregate quarry to support quarry operations. In 2015, Albemarle acquired the site and resumed
exploration and mine feasibility studies.
In support of the Kings Mountain Mine Project (project), Albemarle has applied for, and has
received draft NPDES permit NCO090212 for the temporary discharge of water contained in the
pit lake at Kings Mountain. Issuance of the permit with an effective date of April 1, 2024 is
currently expected. As required by condition A(2) in Part 1 of the permit, Albemarle has
prepared and is submitting this Pumping Operations and Monitoring Plan for approval.
2.0 Elements of Pumping O&M Plan
As detailed in the permit, the Pumping Operations and Monitoring (O&M) Plan should include
the following elements. Each is briefly discussed in the following section, with additional detail
provided later in this document.
The pumping O& M plan shall include, but is not limited to, the following:
A detailed site plan showing wetlands, ditches, well placements, pits, borrow areas,
overburden storage, stormwater controls/ BMPs, vehicle maintenance areas, total
drainage area, and access/haul roads
Attached Figures 2 and 3 indicate the location of the dewatering activity, including the
treatment plant, much of the pipeline route, and the discharge point at South Creek
AALBEMARLE 10
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
Reservoir, and show the general topography. The dewatering pumping and treatment
activities occur in the mine pit lake, which is an internally draining, isolated water body
with no potential for discharge to waters of the state possible (other than the pumped
discharge addressed in the permit). Therefore there are no stormwater BMPs proposed or
required for the activities occurring in the pit lake. Similarly, since there is no active
mining operation, there are no overburden storage areas, vehicle maintenance activities,
etc.
The pipeline connecting the mine pit to the South Creek reservoir was laid on the ground,
thus avoiding ground disturbances that could cause loss of sediment to creeks.
Detailed plans to maintain the surrounding hydrology that protects the affected
streams and wetlands.
Addressed in Section 3.0
and the respective monitoring to demonstrate compliance, and
(Addressed in Section 4.0)
The pumping regime deemed necessary to protect affected streams and wetlands.
Protection of affected streams and wetlands will be accomplished through the proper
operation of the treatment plant, and influent and effluent monitoring to ensure
compliance with the discharge limitations. The water treatment plant will be staffed with
operators that are licensed to operate a Class I treatment plant. An adaptive management
approach will be taken as described in Section 6.0.
3.0 Plans to Maintain Surrounding Hydrology
The pit lake is an isolated body of water (not connected to other water bodies The water will be
pumped through a treatment system, then piped to South Creek Reservoir, which discharges to
Kings Creek through two 36-inch pipes in the dam. Water leaving the discharge point (dam
spillway pipes) flows over a series of energy dissipating features (rip rap, etc.) designed to
minimize the velocity of water exiting the dam and entering Kings Creek. Dewatering is
anticipated to take place over approximately 18 to 24 months.
Baseline water quality has been assessed in the pit lake, South Creek, South Creek Reservoir,
and Kings Creek since late 2018, including quarterly monitoring that has been conducted since
May 2022. NCDEQ received a comprehensive report of the water quality in the affected water
bodies, and has established volume and concentration discharge limits in the permit that are
protective of water quality in receiving waters. Albemarle has constructed a water treatment
system to meet those discharge limits. Water entering the treatment system will be sampled at
least once per shift to assess the levels of contaminants, and to calculate/adjust the appropriate
dose of treatment chemicals required to achieve compliance with the protective discharge limits.
AALBEMARLE,-
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
In addition to the water quality monitoring, Albemarle conducted baseline assessments of aquatic
biology in 2022 to understand the species present in the pit lake, Kings Creek, and other water
bodies throughout the mine property. All species of fish, crustaceans, and bivalves encountered
during the baseline assessment are listed as Least Concern by the International Union for
Conservation of Nature. The results of the assessment and desktop research indicate that it is
unlikely that federally listed or state -listed aquatic species of concern occur in the project area.
Protection of downstream water quality, and the integrity of the receiving waters, will be
protected primarily by complying with the discharge limits established in the permit, along with
periodic observations of the physical condition of the creek in downstream locations.
Channel stability of Kings Creek was also evaluated in 2022 to understand the potential impacts
that may result from discharging water from the pit lake. The analysis determined that the
dewatering process will not result in flooding or erosion impacts to Kings Creek, both within and
beyond the boundary, unless flows exceed 3500 gallons per minute (gpm). Flow will be
monitored continuously to demonstrate compliance with the limit, but the physical limitations of
the pumps and treatment system make it incapable of pumping more than the discharge limit.
4.0 MONITORING REQUIRMENTS
The NPDES permit monitoring program includes the documentation and monitoring of water
quality and aquatic biology. Specific monitoring parameters are described in the following
sections.
4.1 General Monitoring
Water quality monitoring will include collection of field water quality parameters and water
samples for chemical analysis. Monitoring will be conducted at the effluent point (after
treatment) and in Kings Creek at about 100ft upstream and downstream of the discharge point
(Table 1, Figure 1). Monitoring will take place in accordance with the permit and table 1.
Table 1. Water Quality Monitoring Sites
Location
Latitude Longitude Location Description
Effluent
Discharge pipe or substantially similar location.
Upstream
Kings Creek, about 15011 upstream of South Creek
Reservoir Outfall.
Downstream
Kings Creek, about 150ft downstream of South Creek
Reservoir Outfall.
AALBEMARLE
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
4.1.1 Field Water Quality Parameters
Field water quality parameters include temperature and pH. Monitoring will be conducted using
a direct -read, hand-held water quality instrument such as YSI®, or similar, and measurements
will be recorded using an electronic data collection platform, such as ESRI's Survey 123
or similar. Instruments will be inspected and properly calibrated according to the manufacturer's
operating instructions prior to each use. In situ water quality monitoring will be co -located with
water sampling locations.
In addition, the Water Treatment Plant has process sensors that continuously collect water
quality data at various stages of treatment which will allow for adjustments of treatment of the
mine pit water to meet water quality standards.
4.1.2 Water Sampling
The sampling team will document field -derived information, observations, and other field data
using an electronic data collection platform, such as ESRI's Survey 123 or similar. Information
collected should include sampling details such as field team members, sampler name, sample
type, location name, GPS coordinates, time/date, general site conditions, and other observations
(e.g., presence of wildlife, weather).
Water samples will be analyzed for the parameters listed in the permit, using the procedures
specified therein. The analytical lab will provide the appropriate bottle, required volume, and
preservatives for each sample.
4.2 Specific Monitoring Locations and Requirements
4.2.1 Upstream Sampling
Grab samples will be collected from the Upstream Kings Creek sampling location and analyzed
for turbidity on a monthly basis. However, if the effluent turbidity exceeds 50 NTU, monitoring
shall be conducted weekly during the months of June, July, August, and September and monthly
during the remaining months of the year until effluent turbidity is less than 50 NTU.
4.2.2 Downstream Sampling
Grab samples will be collected from the Downstream Kings Creek sampling location and
analyzed for turbidity, pH, and temperature on a monthly basis. However, if the effluent turbidity
exceeds 50 NTU, monitoring shall be conducted weekly during the months of June, July, August,
and September and monthly during the remaining months of the year until effluent turbidity is
less than 50 NTU.
AALBEMARLE QD
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
4.2.3 Effluent Sampling
Grab samples will be collected from the effluent discharge. TSS, Turbidity, Temperature,
Chlorides, Copper, Cyanide, Fluoride, Selenium, Silver, Sulfide, NH3-N, and pH will be
sampled monthly. Nitrogen, Phosphorus, zinc, cadmium will be sampled quarterly.
During all sampling events, the sampling team will check and record that there is no discharge of
floating solids or foam visible in other than trace amounts.
Flow will be monitored continuously by instream process sensors prior to discharge.
Mercury sampling will be conducted on an annual basis and the sampling team will follow EPA
Method 1669 (Appendix Q. Method 1669 is commonly referred to as the "Clean Hands — Dirty
Hands" method and is briefly described below:
Dirty Hands/Clean Hands — Upon arrival at the sampling site, one member of the
sampling team is designated as "dirty hands " and another member is designated as "clean
hands ".
"Dirty Hands" is responsible for all activities that do not involve direct contact with the
sample. Examples of activities performed by "dirty hands " include:
• Removal of the double -bagged sample containers from the cooler
• Holding and opening of the outer zip -type bag
• Operation of any sampling apparatus involved in collection (e.g., peristaltic
pump, grab sampling device, etc.)
• If only two samplers are available, then "dirty hands " should also be responsible
for performing all necessary documentation.
"Clean Hands" only performs operations involving direct contact with the sample or
sample collection container. These activities include:
• Opening and closing the inner zip -type bag
• All direct handling of the sample container, including attachment/detachment of
sample container to/from collection device.
• Transfer of the sample from the sample collection device to the sample container
Sampling — Whenever possible, samples are collected facing upstream and upwind of the
sampling team. "Clean hands" should remove the sample container from the inner bag
and reseal the inner bag to minimize potential contamination.
AALBEMARLE 0
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
Surface samples are collected using a grab sampling technique. This technique involves
submersion of the sample container, filling and capping the container while still submersed
to minimize exposure to airborne contamination. Prior to its final filling, the sample
container should be partially filled and rinsed three times with the sample to be collected.
All sample containers should be completely filled to minimize contact with the
atmosphere and should immediately be tightly capped. While "dirty hands " holds open
the outer ziplock bag, "clean hands " opens the inner bag, returns the filled sample
container to the inner bag, and reseals the inner bag. "Dirty hands " then reseals the
outer bag and places the sample in the cooler (Brooks).
Whole Effluent Toxicity (WET) testing will be conducted on a quarterly basis, as a grab sample
using the test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent
Bioassay Procedure. The tests will be performed during the months of February, May, August,
and November and the sample must be obtained during representative effluent discharge and
shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in " North Carolina Phase II Chronic Whole
Effluent Toxicity Test Procedure" (Revised- December 2010) or subsequent versions.
AALBEMARLE 0
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
MINE DEVELOPMENT PRE-
SELECT PHASE
Prospective Pit
Dewatering
Monitoring
Locations
O Monitoring Location
O NPDES Discharge Point
Stream
O Waterbody
Project Area
Cleveland County, NC
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AALBEMARLE'P�,
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
Figure 1. Water quality sampling locations.
At all other sampling locations, surface water samples will be collected by hand or peristaltic
pump, depending on water depth. After donning new, powder -free nitrile gloves at each location,
the sample bottle will be lowered into the water until full, then capped, taking care to not include
any floating material in the sample container.
If the water is too shallow to submerge the bottle, a peristaltic pump will be used. A peristaltic
pump draws the sample through heavy -wall Teflon® tubing and pumps it directly into the
sample container. Some analytes may need to be field -filtered to remove suspended particulates.
Samples can be filtered by placing adaptable filters on the peristaltic pump. Medical -grade
silicon tubing can also be used in peristaltic pumps. The sampler should ensure that the tubing
does not pick up sediments from the bottom of the waterbody or touch the inside of the sample
bottle. The tubing will be purged by pumping surface water through the pump for 2 minutes
before collecting any samples. Filtered samples will be collected first, followed by unfiltered
samples. New tubing (and filter if applicable) will be used at each location.
Additional volume will be collected for Quality Assurance/Quality Control (QA/QC) samples as
needed. Sample containers and preservatives will be provided by the laboratory. Sample jars
will be labeled immediately after collection and stored on wet ice until delivery to the laboratory.
Samples will be shipped via overnight courier (FedEx), or hand delivered, under Chain of
Custody (COC). Care will be taken to avoid shipping/delivery on weekends and/or near holidays.
5.0 DAM INSPECTION
Because the dewatering operation will increase the flow of water through the dam, a daily
inspection of the dam structure will be performed. The daily inspection will comprise a visual
inspection of the dam's upstream face and downstream toe for the following:
• Signs of erosion on the dam faces due to wave action, runoff and/or flow through the
discharge pipe.
• Changes in seepage condition at the dam toe, downstream face, or dam abutments.
Changes in seepage conditions could include increased seepage rates, changes in seepage
color, and/or increased turbidity.
• Increased vegetation growth on the downstream face of the dam. potentially indicating
increased saturation conditions.
• Blockages at the appurtenance inlet and/or spillway, including signs of beaver activity
and/or debris buildup.
AALBEMARLE"
Kings Mountain Facility
348 Holiday Inn Drive
Kings Mountain NC 28086
• Changes in flow conditions out of the outlet pipe, including significant increases or
decreases in flow rate which could indicate erosion or blockage, respectively.
The results of the visual inspection will be recorded in a daily checklist and reviewed by the
Mine Operations Manager. In the event an unusual condition is observed, the Mine Operations
Manager will contact the Senior Manager of Geotechnical Governance for further direction.
6.0 MITIGATION MEASURES AND ADAPTIVE MANAGEMENT
The NPDES permit monitoring program is designed to evaluate whether project goals and
objectives are being met. During the course of monitoring, if impacts to water quality,
streambanks, and aquatic life are identified, a modification in protocols or other actions may be
needed to minimize or prevent impacts from compounding. The need for and specific measures
taken will be determined based on the specific circumstances. Some examples of adaptive
management measures to reduce/mitigate impacts may include, but are not limited to:
• Water entering the treatment system will be sampled once per shift to assess the levels of
contaminants, and to calculate/adjust the appropriate dose of treatment chemicals
required to achieve compliance with discharge limits.
• If NPDES effluent limitations (i.e., narrative conditions or analyte numerical values) are
exceeded, Albemarle will investigate potential cause(s) and identify mitigation measures,
as appropriate such as adjusting treatment chemicals, replacing parts in the treatment
system, adding freshwater to Kings Creek)
• If QA/QC samples show anomalies, sampling and analytical methods will be reviewed
and modified or improved if possible.
• If water quality meter probes or other instruments are malfunctioning or damaged, they
will undergo recalibration, maintenance or replaced if deemed necessary.
SHEET INDEX PLAN
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