5409_LeniorCountyMSWLF_GWMR_20171031

Lenoir County Subtitle D Lined MSWLF
LaGrange, North Carolina
July 2017
Permit Number: 54-09
Prepared for
Municipal Engineering Services Company, P.A.Garner and Boone , North Carolina
MESCO Project Number: G17029.0
Semi-Annual Water Quality Monitoring Report
P.O. Box 97
Garner, NC 27529
License No. C-0281

TABLE OF CONTENTS
SECTION
Introduction Page 1
Background Page 1
Sampling Procedure Page 2
Field Parameter Data Page 2
Laboratory Results Page 2
Quality Control Samples Page 2
Groundwater Samples Page 2
Surfacewater Samples Page 3
Leachate Samples Page 3
Groundwater and Surfacewater Characterization Page 3
Findings Page 3
Closing Page 4
TABLES
Groundwater Monitoring Well Construction Table Table 1
Sampling and Analysis Summary Table 2
Groundwater, Leachate and QC Sample Detections Table 3
Hydrogeologic Properties at Monitoring Well Locations Table 4
FIGURES
Topographic Map with Site Location Figure 1
Potentiometric Map of Uppermost Aquifer Figure 2
APPENDICIES
Laboratory and Field Analysis Reports and Chains of Custody Appendix A
October 31, 2017
Ms. Jaclynne Drummond
Solid Waste Section (SWS)
NC Department of Environmental Quality (NCDEQ)
2090 US Highway 70 Swannanoa, NC 28778
Re: Semi-Annual Water Quality Monitoring Report
Lenoir County Subtitle D Lined Landfill, Phase 1
Permit No. 54-09 MESCO Project No. G17029.0
Event Date(s): July 11, 2017

Dear Ms. Drummond:
Introduction
On behalf of Lenoir County, Municipal Engineering Services Company, P.A. (MESCO) is pleased to present this
Semi-Annual Water Quality Report for the summer event performed at the Lenoir County Subtitle D Lined
Municipal Solid Waste Landfill (MSWLF). NCDENR Solid Waste Rules 15A NCAC 13B.1632 and permit to
operate requires that Lenoir County provide this report to the SWS on a semi-annual basis. This report documents
the quality of the groundwater, surface waters and leachate during this monitoring event performed on July 11,
2017. Laboratory analytical results indicate that a few metals were detected in estimated concentrations above their
respective regulatory Standards. The source of metals is believed to be erosion of natural deposits rather than
anthropogenic.
Background
The Lenoir County Subtitle D lined MSWLF, permit #54-09, is located at 2949 Hodges Farm Road, LaGrange,
North Carolina. The site location topographic map is depicted in the attached Figure 1. The lined MSWLF is
currently not accepting waste rather being transferred to another out of county MSWLF.
Water quality at this facility has been monitored at least semi-annually since prior to operation in 2003 with all
historical analytical data available for trend comparison.
As specified within 15A NCAC 13B.1632(j), the SWS Environmental Monitoring Report Form and SWS issued
memorandums this report contains sampling procedures, field and laboratory results, groundwater and surface water
characterization. Well construction summary table, sampling and analysis summary table, detections compared to
Standards table, hydrogeologic properties table, potentiometric map, field parameters, laboratory analytical reports
with quality assurance/quality control data and chains-of-custody (C-O-C) are also included in this report.

Sampling Procedure
Environment 1 (E1) of Greenville, NC reportedly performed this sampling event utilizing portable monitoring
methodology in accordance with the approved Sampling & Analysis Plan (SAP) contained in the Lenoir County
Landfill, Phase 1 Design Hydrogeologic Study dated August 19, 2002. E1 reportedly collected water samples from
four downgradient groundwater monitoring wells (MW-14 through MW-17), two hydraulically upgradient
background wells (MW-13 and MW-18), and the the leachate lagoon (LAGOON). Quality control measures
instituted during this event included submittal and analysis of an equipment blank (EB), field blank (FB) and trip
blank (TB). Additional static water level readings were recorded from ten supplementary piezometers (P-3A, P1-4,
P1-14, P-14, P-17, P2-4, P2-9, P2-10, MW-19S and MW-19D) to improve potentiometric map coverage. A
summary detailing the construction of the water monitoring wells is presented on Table 1. The lone designated
surface water sample point SW-3 was reported to be dry. Monitoring locations are shown in Figure 2.
Field Parameter Data
E1 reported the field parameters (pH, static water levels, specific conductance, temperature and turbidity) in the
laboratory analysis report (Appendix A).
Laboratory Results
Samples collected from monitoring wells contained in the SAP were analyzed for the VOC and total metal
constituents listed in Appendix I of 40 CFR Part 258. The lined leachate lagoon (LAGOON) samples were tested
for the SWS required leachate specific parameters (Appendix I VOCs and metals, nitrate, phosphorus, chemical
oxygen demand, biological oxygen demand, pH, and sulfate) plus additional constituents required by the City of
Kinston WWTP. The QC samples were tested for the Appendix I list of parameters and mercury. A sampling and
analysis table summarizing the locations, target parameters and laboratory methods is presented as Table 2. E1
documentation indicates samples were transported under C-O-C protocols and analyzed within the specified hold
times for each method.
Water samples were analyzed to the laboratory-established Method Detection Limits (MDL), which are at or below
the current Solid Waste Section Limit (SWSL). Table 3 summarizes constituents detected in groundwater samples,
leachate samples and QC samples compared to the current SWSL, SWS adopted Groundwater Protection Standards
(GWP), North Carolina Groundwater Standards (2L) or the Maximum Contaminant Level (MCL) commonly
referenced as the Federal “Drinking Water Standard”.
Quality Control Samples
Up to four out of fifteen total metals were detected in low “j-qualified” concentrations in the quality control blanks
(EB and FB). Although the field and/or laboratory induced artifact contamination was identified it is unlikely the
data set has been influenced by false positives or high bias.
2
Groundwater Samples
Three metals were detected above the NC GWP Standard but below the SWSL “j-qualified” in samples collected
from four wells including a background well (MW-13) as summarized in the following table.
Metals Detected Above GWP Standards in Groundwater
Cobalt Vanadium
SWSL 10 25
GWP STD.1 0.3
MW-13 (BG Well)0.41 j
MW-14 9 j
MW-15 1.3 j 2.4 j
MW-17 1.4 j
Concentrations in ug/L. j = “j-qualified” since below the SWSL thus value is considered an estimate
VOC's, which are typically more indicative of a release, were not detected in any samples.
Surfacewater Samples
Surfacewater monitoring point SW-3 was dry; thus, no surface water information was reported for this event.
Leachate Samples
No contaminants were detected in leachate samples collected from the lined lagoon (LAGOON) above regulatory
Standards including the two metals detected above GWP in the groundwater samples.
Groundwater and Surface Water Characterization
A single-day potentiometric map of the surficial aquifer created from groundwater elevation data recorded during
this event is presented as Figure 2. Groundwater flow rates and directions were calculated based on this data and
are included in Table 4. Groundwater flow was in a general northeasterly direction towards the designated wetlands
and rates calculated by modified Darcy's equation ranged from approximately 10 feet/year (MW-18) to 168 feet/year
(MW-16) with an average of 84 feet/year for all wells. Flow directions and gradients are generally consistent with
historical observations. Surface water sampling point SW-3 has reportedly been dry during each monitoring event
since July 2007.
Findings
Constituents have rarely been detected in concentrations in exceedance of regulatory Standards until this and the
previous event when low levels of cobalt and vanadium were found. The metal detections are believed to be a
product of erosion of natural deposits and not an anthropogenic source.
3
Figures
Topographic Map with Site Location
Lenoir County Landfill Facility
FIGURE 1
QUADRANGLE LEGEND
N
2949 Hodges Farm Rd (SR1524)
LaGrange, NC 28501
Lat:35-17-07.4269
Long:-77-42-32.7453
Northing:561295.59
Easting:2385220.32
SW-3
UNLINEDC&D
MSWLF
SUBTITLE DLINEDMSWLF
DATEDRAWING NO.SHEET NO.
SCALE:
DATE:
DRWN. BY:
CHKD. BY:
PROJECT NUMBERBYREV.DESCRIPTION
Table
Table 1
Groundwater Monitoring Well Construction Table
July 11, 2017
Well
Diameter
Total
Well
Top of
Screen
Screen
Length
Top of Casing
Elevation
Ground
Elevation
Groundwater
Elevation
Depth to
Water
(inches)(ft bgs)(ft bgs)(ft)(ft amsl)(ft amsl)(ft amsl)(ft btoc)
MW-13 9/3/03 2 29.4 14.40 15 Silty Sand 107.81 105.79 82.81 25.00 N35° 17' 23.50"W77° 42' 28.56"
MW-14 9/3/03 2 21 6 15 Silty Sand 74.81 72.80 62.19 12.62 N35° 17' 28.11"W77° 42' 10.92"
MW-15 8/22/01 2 15.13 5.13 10 Silty Sand 71.64 68.69 64.09 7.55 N35° 17' 24.53"W77° 42' 10.28"
MW-16 9/2/03 2 21 6 15 Silty Sand 76.36 73.95 68.03 8.33 N35° 17' 21.53"W77° 42' 11.35"
MW-17 9/3/03 2 28 13 15 Silty Sand 101.06 99.06 77.65 23.41 N35° 17' 13.30"W77° 42' 22.33"
MW-18 4/24/04 2 30.85 15.85 15 Silty Clayey Sand 106.74 103.74 82.94 23.80 N35° 17' 09.44"W77° 42' 27.07"
NOTE:
bgs = below ground surface
amsl= above mean sea level
btoc = below top of casing (PVC well casing)
Monitoring
Well
Date
Installed
Geology of
Screened Interval Latitude Longitude
Lenoir County Subtitle D Lined MSWLF Page 1 of 1
Table 2
Sampling and Analysis Summary
July 11, 2017
VOCs Total Metals VOCs Mercury, TotalStatic Depth to WaterTemperatureConductivitypHTurbiditySulfatepHPhosphorusBOD, 5 dayCODNitrateLab EPA 8260B Lab EPA200.8Lab EPA 8260BLab 245.1 R3-94SM2550BSM2510BSM4500HBSM2130-BSM426CLab SM4500HBLab EPA365.4Lab SM5210BLab HACH8000Lab EPA 353.2MW-13 x x x x x x x
MW-14 x x x x x x x
MW-15 x x x x x x x
MW-16 x x x x x x x
MW-17 x x x x x x x
MW-18 x x x x x x x
SW-3
LAGOON x x x x x x x x x x x x
EB x x x
FB x x x
TB x
Not sampled since dry which is typical
App I & II = Lists from current 40 CFR 258
App. I App II Field Parameter Leachate
Lenoir County Subtitle D Lined MSWLF Page 1 of 1
Table 3
Groundwater, Leachate and QC Sample Detections
July 11, 2017
MW-13 MW-14 MW-15 MW-16 MW-17 MW-18 LAGOON EB FB
BG S S S S BG LEACHATE QC QC
Antimony, total 0.06 6 1 6 0.12 J 0.06 J 0.07 J
Arsenic, total 0.07 10 10 10 1.3 J 7 J
Barium, total 0.07 100 700 2000 44.9 J 42.3 J 182 31.9 J 89.3 J 15.8 J 69.1 J 0.07 J
Beryllium, total 0.07 1 4 4 0.12 J 0.21 J 0.14 J 0.09 J 0.23 J
Chromium, total 0.08 10 10 100 0.11 J 0.13 J 0.1 J 0.27 J 0.35 J 0.16 J 0.55 J 0.45 J 0.74 J
Cobalt, total 0.24 10 1 NE 0.87 J 1 J 1.3 J (N)0.49 J 1.4 J (N)
Copper, total 0.09 10 1000 1300 0.69 J 2.1 J 1.7 J 0.45 J 0.54 J 0.38 J 0.65 J 0.36 J 0.14 J
Lead, total 0.08 10 15 15 0.29 J 4.1 J 0.39 J 0.09 J 2 J 0.36 J 0.1 J
Nickel, total 0.08 50 100 NE 1.4 J 2.8 J 1.4 J 1.2 J 1.5 J 0.73 J 0.65 J 0.27 J 0.3 J
Selenium, total 0.51 10 20 50 2.6 J
Thallium, total 0.08 5.5 0.28 2 0.11 J
Vanadium, total 0.24 25 0.3 NE 0.41 J (N)9 J (N)2.4 J (N)
Zinc, total 0.66 10 1000 NE 3.2 J 7.8 J 7.6 J 2.5 J 4.4 J 3.7 J 1.9 J
Turbidity (Field)NE NE NE 2.92 151 16.4 6.27 1.75 31.2 6.61 ----
BOD 2 2 NE NE ------------3100 ----
COD 0.84 20 NE NE ------------31000 ----
Units ug/L, Blank cells means Not Detected, -- means not tested
Red Bold Above Established MCL/2L/GWP Std.
Above Established Federal MCL Drinking Water Std. No regulatory compliance significance.
MDL = Method Detection Limit, SWSL = Solid Waste Section Limit, 2L/GWP Standard = NC 2L and IMAC Standards adopted by SWS, MCL = Maximum Contaminant Level for Drinking Water
J = "J-qualified". Concentration detected between MDL and SWSL. Considered estimated value
(N) Preliminary source is believed to be Natural originating from erosion of natural deposits. Source not anthropogenic.
A definitive source of the detections was not determined as part of this report.
BG = Background Well Sample, QC = Quality Control Sample, S = Sentinal Well Sample
Parameter Name MDL SWSL 2L/GWP
Std MCL
Metals (Appendix I)
Leachate Parameters
Turbidity (NTU)
Lenoir County Subtitle D Lined MSWLF Page 1 of 1
Table 4
Hydrologic Properties at Monitoring Well Locations
July 11, 2017
Hydraulic
Conductivity
Effective
Porosity
Groundwater
Velocity Rate
Depth To
Water
Water Table
Elevation
(cm/sec)(%)(ft/yr)(ft btoc)(ft amsl)
MW-13 7.69E-05 23 0.224 78 N55E 25.00 82.81 Silty Sand
MW-14 3.38E-03 23 0.006 84 N66E 12.62 62.19 Silty Sand
MW-15 2.89E-03 23 0.003 39 N66E 7.55 64.09 Silty Sand
MW-16 9.72E-04 23 0.039 168 N74E 8.33 68.03 Silty Sand
MW-17 1.13E-03 23 0.025 128 N87E 23.41 77.65 Silty Sand
MW-18 1.25E-04 23 0.018 10 S84E 23.80 82.94 Silty Clayey Sand
Minimum 7.69E-05 23 0.003 10 -7.55 62.19 -
Average 1.43E-03 23 0.052 84 -16.79 72.95 -
Maximum 3.38E-03 23 0.224 168 -25.00 82.94 -
NOTE:1.Hydraulic conductivity (K) values based on slug test results, performed by MESCO in December 2005.
2. Effective Porosity (ne) values obtained from the MESCO Ph. 1 Design Hydrogeologic Report completed in August 2002.
3.Static water levels recorded by Environment 1, Inc. on July 11, 2017.
Linear velocity rate (Q) is defined by modified Darcy's equation:
where
K = hydraulic conductivity
ne = effective porosity
dh = head difference
dl = horizontal distance
Monitoring
Well
Hydraulic
Gradient
(ft/ft)
Flow
Direction
Screened Interval
Lithology
dl
dh
n
KQ
e
×-=
Lenoir County Subtitle D Lined MSWLF Page 1 of 1
Appendix A
Laboratory Analysis Report
Field Analysis Report
Chains of Custody