Andale_Monitoring Well Installation N GW Sampling-OCR

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1 Introduction
Monitoring Well Installation and Groundwater Sampling Work Plan
Site Development Activities -Forest City, NC
Andale LLC
This Monitoring Well Installation and Groundwater Sampling Work Plan is associated with a
limited groundwater investigation that is being conducted in order to evaluate the current
groundwater quality at the site. Based on our understanding of the site conditions, ENVIRON
proposes to sample select existing groundwater monitoring wells on the property and install and
subsequently sample approximately 1 O additional monitoring wells. The soil boring/monitoring
well locations will be finalized while on site based on field observations, utility clearance, access
constraints, and information provided by knowledgeable facility personnel, if available.
1.1 Background
The approximately 370,000 square foot building is located on the northern portion of the site
and was initially developed by Burlington Industries in 1966 for use as a textile manufacturing
facility. Manufacturing operations consisted of washing and cleaning of woven fabrics, fabric
dyeing, washing and rinsing of dyed fabric, burling and mending, and surface finishing
operations. Burlington Industries was acquired by Rutherford County in 2002, and commencing
in 2003, Rutherford County leased the facility on the northern portion of the site to Mako Marine
for use in fiberglass boat manufacturing. Operations conducted by Mako Marine included open
molding of reinforced plastic composite boat parts, final assembly, testing, and shipment off-site
to Bass Pro Shops for retail sale. Mako Marine ceased operations at the site in 2009 .
2 Groundwater Investigation
Based on our understanding of the site conditions, ENVIRON will sample select existing
groundwater monitoring wells on the property and install and subsequently sample six Type II
groundwater monitoring wells and four deeper Type Ill groundwater monitoring wells (Figure 1).
Prior to initiating field activities, a site-specific health and safety plan (HASP) will be developed
and followed by all field personnel for the on-site work. Additionally, ENVIRON will notify the
state underground utility protection service to identify on-site commercial utilities. To obtain
subsurface clearance for private utilities on-site, a private utility locator may be contracted to
identify utilities in the vicinity of each drilling location.
2.1 Sampling Select Existing Monitoring Wells
In order to evaluate the current groundwater quality at the site, a focused groundwater
assessment will be conducted, including sampling of existing monitoring wells. The
groundwater samples will be collected using a peristaltic pump attached to disposable tubing. If
the depth to groundwater precludes the use of a peristaltic pump, an electrical submersible
pump will be used. Prior to sampling, the monitoring wells will be purged using low-flow
techniques. During purging, groundwater parameters (i.e., pH, specific conductivity,
temperature, oxidation-reduction potential [ORP], and dissolved oxygen) will be recorded and/or
logged using a multiple parameter field instrument with a flow-through cell. A monitoring well
will be considered to have been adequately purged when the pH, specific conductance, and
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Monitoring Well Installation and Groundwater Sampling Work Plan
Site Development Activities -Forest City, NC
Andale LLC
temperature of the groundwater have stabilized to ±10% over three successive readings.
Following purging, the wells will be sampled.
2.2 Installation and Sampling of Additional Monitoring Wells
In order to better understand the groundwater quality at the property, up to six shallow Type II
groundwater monitoring wells and up to four deeper Type Ill groundwater monitoring wells will
be installed. Each deeper, Type Ill monitoring well will be situated in proximity to one of the
shallow Type II monitoring wells. ENVIRON will initially advance the Type II monitoring well
borings using direct-push technology (DPT) in order to collect soil continuously from the surface
to boring termination. The soil will be collected using an approximately 2-inch diameter, 4-to 5-
foot long macro-core device complete with acetate sleeve, and field screened with a
photo ionization detector (Pl D) to determine the relative concentrations of volatile organic
compounds (VOCs) present in the soil collected. The soil will also be inspected for obvious
signs of contaminant impact (i.e., visual staining and/or odor). If an indication of impact is
observed, a soil sample will be collected from the depth interval of the soil column, above the
water table, that exhibits the greatest indication of impact and submitted for laboratory analysis.
Additionally, in order to potentially delineate an impact, a soil sample will be collected from the
interval just above the water table and held, pending analytical results of the shallower sample.
If no indications of impact are identified, no soil sample will be collected . Upon completion of
the DPT boring, the drill rig will be converted to hollow-stem auger (HSA) drilling to advance the
soil borings for the purpose of installing Type II groundwater monitoring wells. It is assumed
that groundwater will be encountered within 25 feet below ground surface and bedrock will not
be encountered prior to reaching approximately 10 feet below the water table in the shallow.
In order to investigate the vertical extent of groundwater quality at the property, a HSA drilling
rig capable of converting to air hammer/rotary and/or rock coring will be utilized to advance a
soil/rock boring for the purpose of installing Type Ill groundwater monitoring wells. The boring
and subsequent well will be located approximately 5 to 10 feet away from a Type II monitoring
well location. The boring will be advanced via HSA drilling to the top of bedrock. Upon reaching
the top of bedrock, the boring will be advanced using air hammer/rotary drilling approximately 3
to 5 feet into the bedrock in order to set outer casing. After the outer casing is set/sealed, the
boring will be advanced using either rock core drilling or air hammer/rotary drilling, depending
on whether rock characterization is needed. Soil will not be collected, as soil will be collected
and screened during installation of the Type II monitoring well, as described above. If rock core
drilling is conducted, the rock core will be collected continuously and logged for the purpose of
fracture analysis and calculating Rock Quality Designation (RQD). If air hammer/rotary drilling
is conducted, drill cuttings will be logged and penetrations rates and drill string advancement will
be observed in order to potentially identify fractures in the bedrock.
The newly installed groundwater monitoring wells will be developed utilizing an electrical
submersible pump and will continue until the turbidity decreases and a minimum of five well
volumes have been purged from the well. Following development, the wells will be sampled .
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Monitoring Well Installation and Groundwater Sampling Work Plan
Site Development Activities -Forest City, NC
Andale, LLC
The drilling and sampling equipment will be decontaminated prior to the initial boring and
between each subsequent boring location. Drilling residuals (i.e., soil cuttings, wash water,
purge water) and other investigative-derived waste (IDW) will be staged on-site in clean,
labeled, 55-gallon drums for future disposal pending the laboratory analytical results.
3 Groundwater Analysis
The groundwater samples (and soil, if collected) will be placed in clean, appropriately
preserved, laboratory-supplied containers. After the samples have been collected, they will be
sealed, labeled, and placed on ice pending delivery under chain-of-custody procedures to the
laboratory for analysis. Based on the constituents historically detected at the site, the samples
will be analyzed for voes using U.S. EPA SW-846 Method 8260. One trip blank will
accompany the voe sample bottles and will be analyzed for the same parameters .
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