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HomeMy WebLinkAbout7002_PasquotankCDLF_20160426_GWMonReport_DIN28020This page intentionally left blank. April 2016 Semi-Annual Groundwater Monitoring Report Pasquotank County Landfill NC Solid Waste Permit No. 70-02 Prepared for: Pasquotank County Solid Waste Department 317 Pritchard Street Elizabeth City, North Carolina 27909 June 2016 Prepared by: © 2016 Smith Gardner, Inc. This document is intended for the sole use of the client for which it was prepared and for the purpose agreed on by the client and Smith Gardner, Inc. This page intentionally left blank. This page intentionally left blank. Pasquotank County Landfill April 2016 - Groundwater Monitoring Report June 2016 Table of Contents Page i Pasquotank County Landfill NC Solid Waste No. 70-02 April 2016 Groundwater Monitoring Report Table of Contents Page 1.0 INTRODUCTION ......................................................................................................... 1  2.0 REGIONAL GEOLOGY ................................................................................................. 1  3.0 SAMPLING LOCATIONS ............................................................................................. 1  4.0 SAMPLING PROCEDURES ......................................................................................... 1  5.0 FIELD & LABORATORY DATA ..................................................................................... 2  5.1 Field Results .............................................................................................................. 2  5.2 Laboratory Analysis ................................................................................................... 2  5.3 Laboratory Results .................................................................................................... 2  5.3.1 Inorganic Constituents .................................................................................. 2  5.3.1.1 Closed MSW .................................................................................... 2  5.3.1.2 C&D ................................................................................................. 2  5.3.2 Organic Constituents .................................................................................... 3  5.3.2.1 Closed MSW .................................................................................... 3  5.3.2.2 C&D ................................................................................................. 3  5.3.3 Surface Water Samples ................................................................................ 3  6.0 GROUNDWATER CHARACTERIZATION ...................................................................... 3  7.0 CONCLUSIONS .......................................................................................................... 4  FIGURE Figure 1 Groundwater Potentiometric Map TABLES Table 1 Groundwater Elevation Data Table 2 Field Parameters Table 3 Detected Inorganic Constituents Table 4 Detected Organic Constituents Table 5 Groundwater Velocity APPENDICES Appendix A Well Logs Appendix B Laboratory Analytical Reports This page intentionally left blank. Pasquotank County Landfill April 2016 - Groundwater Monitoring Report June 2016 Page 1 1.0 INTRODUCTION The Pasquotank County Landfill, which is composed of a closed municipal solid waste (MSW) landfill and an active construction and demolition (C&D) landfill, operates under Solid Waste Permit #70-02 and is required to conduct semi-annual groundwater monitoring in accordance with Solid Waste Section Rule 15A NCAC 13B .0544. This report presents the semi-annual sampling results for the event conducted on April 26, 2016; and includes a field procedure summary, laboratory analyses and groundwater characterization for the site. The laboratory analytical results and a single-day potentiometric surface map are also included. 2.0 REGIONAL GEOLOGY The Pasquotank County Landfill is located near Elizabeth City, North Carolina in the coastal plain physiographic province. Local soils are primarily fine sands and clayey sands with silty clay lenses. The Miocene Yorktown formation, primarily green to gray fine sand clays, underlies the surficial deposits1. Shallow clay has the potential to cause perched water table conditions in the site vicinity during periods of heavy precipitation. 3.0 SAMPLING LOCATIONS Samples were collected from both the C&D and closed MSW landfills, by Environment 1, Inc.2, this event. The sixteen locations sampled this event included five wells (MW-1, MW-2, MW-5, MW-6 and MW-7) for the closed MSW landfill, eight wells (MW-3, MW-4, MW-8, MW-9, MW-9A, MW-10A, MW-11A and MW-12) for the C&D landfill, two surface water locations (SW-1and SW- 2) and one basin (Basin 1). Available well logs are provided in Appendix A. 4.0 SAMPLING PROCEDURES Groundwater monitoring locations were sampled in accordance with (North Carolina Department of Environmental Quality, Division of Waste Management, NCDEQ DWM) groundwater monitoring guidance and the approved site Water Quality Monitoring Plan (revised February 20143). The depth to water in each well was gauged prior to purging and sampling and is presented in Table 1. Samples were collected in laboratory prepared containers for the specified analytical procedures. Groundwater samples were properly preserved, placed on ice and transported to the laboratory facility within the specified holding times for each analysis. As part of quality control a trip blank was analyzed for Appendix I volatile organic compounds (VOCs). 1 S&ME Geotechnical Investigation Report, letter to Mr. Bill Richardson, September 23, 1982. 2 Environment 1, Incorporated, Greenville, NC, NC Wastewater ID#10 3 Water Quality Monitoring Plan, Pasquotank County Landfill, February 2014, Smith Gardner, Inc., approved February 27, 2014 DIN: 20658 Pasquotank County Landfill April 2016 - Groundwater Monitoring Report June 2016 Page 2 5.0 FIELD & LABORATORY DATA 5.1 Field Results Temperature, pH and specific conductance were measured in the field at the time of sampling via direct read instruments. The field parameter results are summarized in Table 2 and have remained consistent with previously reported sampling events. 5.2 Laboratory Analysis The groundwater samples were transported to Environment 1, Inc. Samples were analyzed for the Appendix I VOCs via EPA Test Method 8260B and metals via EPA Test Method 200.8. 5.3 Laboratory Results Analytical results were compared to the NCDWM Solid Waste Section Quantitation Limits (SWSLs), 15A NCAC 2L.0200 (2L Standard), Solid Waste Section established Groundwater Protection Standards (GWP) and Federal Maximum Contaminant Limits (MCL) for groundwater samples and the 15 A NCAC 2B Standard for Class C waters (2B Standard) for surface water samples. Most constituents were either below the method detection limit (MDL) or were identified by the laboratory as a “J-value” indicating a non-quantifiable value. “J-values” are defined by Environment 1 as between the MDL and SWSL. The laboratory analytical report is included as Appendix B. 5.3.1 Inorganic Constituents A table showing inorganic detections is presented as Table 3. 5.3.1.1 Closed MSW Arsenic was reported at concentrations above the 2L Standard in samples from MW-2 and MW-6. Cobalt was reported at a concentration above the GWP in the sample collected from MW-6. 5.3.1.2 C&D Arsenic (MW-9 MW-9A, MW-10A and MW-11A) and cadmium (MW-6) were reported at concentrations above their respective 2L Standards in collected samples from this event. Cobalt was reported at concentrations above the GWP in samples collected from MW-9A, MW-10A, MW-11A and MW-12. Pasquotank County Landfill April 2016 - Groundwater Monitoring Report June 2016 Page 3 5.3.2 Organic Constituents Detected organic constituents are presented in Table 4. 5.3.2.1 Closed MSW No constituents were reported at or above their 2L Standards this event. Low levels of tetrahydrofuran were reported in the sample from MW-2; however, no standards have been established for this parameter. 5.3.2.2 C&D No organic constituents were reported at or above their 2L Standards. Tetrahydrofuran concentrations were reported in samples collected from MW-9, MW-9A, MW-11A and MW-12; however, no standards have been established for this parameter. 5.3.3 Surface Water Samples No inorganic or organic constituents were reported in the surface water samples. 6.0 GROUNDWATER CHARACTERIZATION Groundwater depths across the site were measured at approximately 6 feet to 10 feet below ground surface (bgs), which is consistent with other coastal counties and previous site records4. A potentiometric surface map was prepared from groundwater data collected this event. Data indicates groundwater is flowing in a southwestern direction, towards Halls Creek. Groundwater flow velocities were calculated for site monitoring wells using the equation: V = Ki/n where K = hydraulic conductivity i = groundwater gradient n = porosity Hydraulic conductivity and porosity values were averaged using data from the September 1982 S&ME boring records from their Geotechnical Investigation Report5. Groundwater flow velocities ranged from 1.59 x 10-3 ft/day (MW-2 & MW-10A) to 7.57 x 10-4 ft/day (MW-1) and averaged 7.02\5 x 10-4 ft/day. Calculated flow velocities are presented in Table 5. The potentiometric surface map is presented as Figure 1. 4 Report of Subsurface Investigation and Geotechnical Engineering Services, GET Solutions, Inc., prepared for McDowell & Associates Pasquotank County C&D Landfill Expansion, April 19, 2013. 5 Geotechnical Investigation Report, Soil & Material Engineers, Inc., Pasquotank County Landfill, September 23, 1982 Pasquotank County Landfill April 2016 - Groundwater Monitoring Report June 2016 Page 4 7.0 CONCLUSIONS Laboratory results indicate that water quality at the Pasquotank County Landfill is generally consistent with reported historical detections. Inorganic constituents results are likely biased high due to turbidity within the samples; therefore we believe the results to be indicative of naturally occurring metals rather than influence from the facility. The next groundwater monitoring event is scheduled for October 2016. Results will be reported to NCDEQ after receipt and analysis of laboratory data. FIGURE April 2016 Groundwater Monitoring Report Pasquotank County Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank. TOC= 13.17 DTW= 8.89 GWE= 4.28 MW-2 TOC= 9.92 DTW= 6.30 GWE= 3.62 MW-3 TOC= 11.37 DTW= 5.54 GWE= 5.83 MW-4 TOC= 9.94 DTW= 5.30 GWE= 4.64 MW-5 TOC= 11.12 DTW= 5.04 GWE= 6.08 MW-6 TOC= 13.48 DTW= 6.79 GWE= 6.69 MW-7 TOC= 10.69 DTW= 4.00 GWE= 6.69 MW-8 TOC= 11.14 DTW= 5.15 GWE= 5.99 MW-9* TOC= 11.11 DTW= 5.70 GWE= 5.41 MW-9A* TOC= 12.42 DTW= 8.27 GWE= 4.15 MW-10A TOC= 11.86 DTW= 6.62 GWE= 5.24 MW-11A TOC= 12.18 DTW= 7.70 GWE= 4.48 NEW MW-12 TOC= 12.62 DTW= 5.70 GWE= 6.92 MW-1 PROJECT TITLE: DRAWING TITLE: REV.DATE DESCRIPTION DESIGNED: DRAWN: APPROVED: PROJECT NO: SCALE: FILENAME: PREPARED BY: PREPARED FOR: SHEET NUMBER:DRAWING NUMBER: DATE: G: \ C A D \ P a s q u o t a n k C o u n t y \ P a s q u o t a n k 1 3 - 1 \ s h e e t s \ P A S Q U O T A N K - D 0 0 0 6 . d w g - 6/ 2 0 / 2 0 1 6 1 : 0 7 P M SEAL SEAL SMITHGARDNER ENGINEERS + 14 N. Boylan Avenue, Raleigh NC 27603 NC LIC. NO. C-0828 (ENGINEERING) 919.828.0577 Electronic files are instruments of service provided by Smith Gardner, Inc. for the convenience of the intended recipient(s), and no warranty is either expressed or implied.  Any reuse or redistribution of this document in whole or part without the written authorization of Smith Gardner, Inc., will be at the sole risk of the recipient.  If there is a discrepancy between the electronic files and the signed and sealed hard copies, the hard copies shall govern.  Use of  any electronic files generated or provided by Smith Gardner, Inc., constitutes an acceptance of these terms and conditions. © 2016 Smith Gardner, Inc.    PASQUOTANK COUNTY  NORTH CAROLINA  SOLID WASTE DEPARTMENT     PASQUOTANK COUNTY WATER QUALITY MONITORING PLAN       GROUNDWATER POTENTIOMETRIC MAP APRIL 2016     M.M.G. C.T.J. PASQUOTANK 13-1 AS SHOWN JUNE 2016 PASQUOTANK-D0006   FIG. 1 MW-1 GWE DTW TOC * Th i s p a g e i n t e n t i o n a l l y l e f t b l a n k . TABLES April 2016 Groundwater Monitoring Report Pasquotank County Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank. Ta b l e 1 Gr o u n d w a t e r E l e v a t i o n D a t a Pa s q u o t a n k C o u n t y L a n d f i l l Ap r i l 2 6 , 2 0 1 6 By:MG Date: 06/10/2016 Mo n i t o r i n g Lo c a t i o n We l l In s t a l l a t i o n Da t e La t i t u d e L o n g i t u d e We l l Di a m e t e r (i n ) To t a l W e l l De p t h ( f t bg s ) 6 G ro u n d Su r f a c e El e v a t i o n ( f t am s l ) 7 TO C El e v a t i o n (f t a m s l ) De p t h t o Wa t e r (f t ) 6 Wa t e r Ta b l e El e v a t i o n (ft bg s ) Sc r e e n In t e r v a l (f t b g s ) Screen Geology MW - 1 1 / 6 / 1 9 8 4 3 6 . 2 4 4 1 1 7 6 . 2 6 5 2 7 2 . 0 2 2 . 0 0 1 0 . 2 0 1 2 . 6 2 5 . 7 0 6 . 9 2 1 0 - 2 0 s a n d MW - 2 1 / 6 / 1 9 8 4 3 6 . 2 4 1 1 4 7 6 . 2 6 7 7 1 2 . 0 2 0 . 0 2 1 0 . 5 0 1 3 . 1 7 8 . 8 9 4 . 2 8 1 0 - 2 0 s a n d MW - 3 1 / 6 / 1 9 8 4 3 6 . 2 3 6 2 2 7 6 . 2 6 7 2 5 2 . 0 2 0 . 9 2 8 . 2 0 9 . 9 2 6 . 3 0 3 . 6 2 1 0 - 2 0 s a n d MW - 4 1 / 6 / 1 9 8 4 3 6 . 2 3 7 0 4 7 6 . 2 6 1 6 9 2 . 0 1 9 . 4 9 9 . 5 0 1 1 . 3 7 5 . 5 4 5 . 8 3 1 0 - 2 0 s a n d MW - 5 2 / 2 3 / 1 9 9 3 3 6 . 2 3 9 5 2 7 6 . 2 6 7 5 2 2 . 0 1 3 . 7 0 9 . 0 0 9 . 9 4 5 . 3 0 4 . 6 4 1 . 5 - 1 0 . 5 s a n d MW - 6 2 / 2 3 / 1 9 9 3 3 6 . 2 3 9 2 9 7 6 . 2 6 5 8 9 2 . 0 1 9 . 1 3 1 0 . 2 0 1 1 . 1 2 5 . 0 4 6 . 0 8 2 . 4 - 1 1 . 4 s a n d MW - 7 1 1 / 9 / 1 9 9 5 3 6 . 2 3 9 0 0 7 6 . 2 6 4 7 6 2 . 0 2 0 . 9 9 1 0 . 5 0 1 3 . 4 8 6 . 7 9 6 . 6 9 2 - 1 2 s a n d MW - 8 1 1 / 9 / 1 9 9 5 3 6 . 2 3 7 6 9 7 6 . 2 6 3 2 6 2 . 0 1 3 . 8 5 9 . 2 0 1 0 . 6 9 4 . 0 0 6 . 6 9 1 . 5 - 1 1 . 5 s a n d MW - 9 1 1 / 1 0 / 1 9 9 5 3 6 . 2 3 6 0 8 7 6 . 2 6 4 0 2 2 . 0 2 6 . 6 2 9 . 0 0 1 1 . 1 4 5 . 1 5 5 . 9 9 1 - 1 1 s a n d MW - 9 A 1 0 / 3 / 2 0 0 1 3 6 . 2 3 6 0 0 7 6 . 2 6 3 7 1 2 . 0 2 2 . 9 9 9 . 0 0 1 1 . 1 1 5 . 7 0 5 . 4 1 5 - 2 0 N A MW - 1 0 A N A 3 6 . 2 3 7 9 5 7 6 . 2 6 7 5 3 2 . 0 2 1 . 8 9 1 0 . 5 0 1 2 . 4 2 8 . 2 7 4 . 1 5 N A N A MW - 1 1 A 4 / 1 0 / 2 0 1 3 3 6 . 2 3 7 3 9 7 6 . 2 6 6 4 9 2 . 0 2 2 . 4 5 8 . 2 0 1 1 . 8 6 6 . 6 2 5 . 2 4 5 - 2 0 s i l t y s a n d & s a n d MW - 1 2 2 0 1 4 3 6 . 2 3 5 6 6 7 6 . 2 6 5 2 4 2 . 0 2 3 . 6 0 1 0 . 2 0 1 2 . 1 8 7 . 7 0 4 . 4 8 5 - 2 0 s a n d NO T E : 1. ) N A = n o t a v a i l a b l e 2. ) 3. ) b g s = b e l o w g r o u n d s u r f a c e 4. ) a m s l = a b o v e m e a n s e a l e v e l 5. ) W e l l c o n s t r u c t i o n i n f o r m a t i o n f r o m w e l l l o g s ( p r o v i d e d i n A p p e n d i x A ) 6. ) * W e l l d e p t h a n d d e p t h t o w a t e r f r o m E n v i r o n m e n t 1 , I n c . r e p o r t d a t e d 5 / 3 1 / 2 0 1 6 , C l i e n t I D # 6 0 0 8 7. ) G r o u n d s u r f a c e e s t i m a t e d f r o m d r a w i n g Ex i s t i n g M W - 1 2 ( T O P e l e v 1 0 . 6 6 ) w a s d a m a g e d i n 2 0 1 4 . N e w w e l l M W - 1 2 w a s i n s t a l l e d n e x t t o t h e d a m a g e d mo n i t o r i n g w e l l . H o r i z o n t a l l o c a t i o n a n d e l e v a t i o n s u r v e y e d b y M C A 8 - 8 - 2 0 1 4 . H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ P a s q u o t a n k \ 0 6 A p r i l 2 0 1 6 \ A p r i l 1 6 p q t g w t a b l e s . x l s x Ta b l e 2 Fi e l d P a r a m e t e r s Pa s q u o t a n k C o u n t y L a n d f i l l Ap r i l 2 6 , 2 0 1 6 By: LMH Date:06/10/2016 Mo n i t o r i n g Lo c a t i o n pH ( s t d u n i t s ) Sp e c i f i c Co n d u c t i v i t y (u m h o s / c m ) Te m p e r a t u r e ( o C) Cl o s e d M S W L a n d f i l l MW - 1 6 . 4 5 4 2 1 8 MW - 2 6 . 6 7 2 2 1 7 MW - 5 6 . 4 2 4 5 2 0 MW - 6 6 . 0 5 7 7 1 9 MW - 7 6 . 6 5 8 4 1 9 C& D L a n d f i l l MW - 3 6 . 6 5 2 0 1 6 MW - 4 6 . 5 8 9 7 1 7 MW - 8 6 . 1 1 0 1 4 1 8 MW - 9 6 . 4 2 5 3 0 1 8 MW - 9 A 6 . 2 2 9 6 0 2 0 MW - 1 0 A 6 . 1 1 3 3 2 1 7 MW - 1 1 A 6 . 0 2 5 2 0 1 6 MW - 1 2 6 . 0 1 5 4 0 1 8 Su r f a c e W a t e r SW - 1 7 . 3 1 3 8 2 1 SW - 2 7 . 7 3 7 7 2 2 Ba s i n 1 6 . 8 7 4 2 1 NO T E : F i e l d d a t a c o l l e c t e d b y E n v i r o n m e n t 1 p e r s o n n e l . Fr o m E n v i r o n m e n t 1 , I n c . r e p o r t d a t e d 5 / 3 1 / 2 0 1 6 , C l i e n t I D # 6 0 0 8 H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ P a s q u o t a n k \ 0 6 A p r i l 2 0 1 6 \ A p r i l 1 6 p q t g w t a b l e s . x l s x Ta b l e 3 De t e c t e d I n o r g a n i c C o n s t i t u e n t s Pa s q u o t a n k C o u n t y L a n d f i l l Ap r i l 2 6 , 2 0 1 6 By: MG Date: 6/16/2016 Mo n i t o r i n g Lo c a t i o n MD L S W S L 2L o r G W P * St a n d a r d MC L 2B St a n d a r d MW - 1 M W - 2 M W - 5 M W - 6 M W - 7 M W - 3 M W - 4 M W - 8 M W - 9 M W - 9 A M W - 1 0 A M W - 1 1 A M W - 1 2 S W - 1 S W - 2 B a s i n 1 An t i m o n y 0 . 0 5 6 1 * 6 6 4 0 0 . 0 9 J < 0 . 0 5 0 . 1 9 J 0 . 0 9 J 0 . 3 5 J < 0 . 0 5 < 0 . 0 5 0 . 1 6 J 0 . 0 7 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 0 8 J 0 . 1 J 0 . 1 7 J 0 . 1 6 J Ar s e n i c 0 . 6 6 1 0 1 0 1 0 1 0 < 0 . 6 6 98 1. 4 J 15 1. 2 J < 0 . 6 6 < 0 . 6 6 6 . 4 J 29 2 5 4 3 8 2 0 6 J 1 . 4 J 1 . 8 J 1 . 8 J Ba r i u m 0 . 0 2 1 0 0 7 0 0 2 0 0 0 2 0 0 0 0 0 0 2 9 . 1 J 1 1 0 2 4 . 9 J 4 8 . 6 J 4 8 . 7 J 7 . 3 J 1 7 . 1 J 7 8 . 2 J 3 2 . 7 J 5 8 . 9 J 7 3 . 2 J 1 1 7 2 5 . 4 J 2 5 . 4 J 4 9 J 3 0 . 4 J Be r y l l i u m 0 . 0 4 1 4 * 4 6 . 5 0 . 0 6 J 0 . 0 5 J < 0 . 0 4 0 . 0 5 J < 0 . 0 4 < 0 . 0 4 0 . 0 6 J 0 . 2 8 J 0 . 2 5 J 0 . 0 8 J 0 . 0 8 J 0 . 0 8 J 0 . 1 J 0 . 0 6 J 0 . 0 4 J 0 . 1 2 J Ca d m i u m 0 . 0 5 1 2 5 2 < 0 . 0 5 0 . 0 6 J 0 . 0 7 J 13 0. 0 5 J < 0 . 0 5 < 0 . 0 5 0 . 0 6 J 0 . 0 7 J 0 . 0 7 J 0 . 0 5 J 0 . 2 2 J 0 . 1 4 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 Ch r o m i u m , t o t a l 0 . 0 6 1 0 1 0 1 0 0 5 0 0 . 1 J 0 . 6 J 0 . 7 9 J < 0 . 0 6 0 . 3 6 J < 0 . 0 6 < 0 . 0 6 6 J 1 . 2 J < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 1 . 9 J 0 . 6 J 5 . 4 J Co b a l t 0 . 0 4 1 0 1 * N E 2 7 0 0 . 2 9 J 4 . 4 J 0 . 6 9 J 22 0. 2 4 J 0 . 0 6 J 3 . 1 J 1 . 7 J 1 . 2 J 17 3 0 7 8 1 0 0 0.28 J 0 . 3 1 J 1 J Co p p e r 0 . 0 7 1 0 1 0 0 0 1 3 0 0 7 1 . 1 J 0 . 3 9 J 5 . 3 J 0 . 9 5 J 4 . 2 J 0 . 3 8 J 0 . 8 5 J 2 . 2 J 0 . 6 6 J 0 . 8 2 J 1 . 1 J 0 . 6 1 J 0 . 9 2 J 2 . 8 J 0 . 8 2 J 5 . 2 J Le a d 0 . 0 6 1 0 1 5 1 5 2 5 0 . 0 7 J < 0 . 0 6 0 . 7 7 J 0 . 2 3 J 0 . 7 J < 0 . 0 6 < 0 . 0 6 0 . 5 7 J < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 0 . 0 9 J 0 . 2 8 J 1 . 2 J 0 . 2 J 4 J Ni c k e l 0 . 0 6 5 0 1 0 0 N E 8 8 2 . 5 J 1 . 9 J 2 J 3 . 8 J 2 . 9 J 0 . 6 2 J 4 . 9 J 7 . 7 J 5 . 1 J 1 1 J 6 . 4 J 1 1 . 2 J 3 3 J 2 . 2 J 2 J 3 . 3 J Se l e n i u m 0 . 5 4 1 0 2 0 5 0 5 < 0 . 5 4 0 . 6 8 J < 0 . 5 4 2 . 8 J < 0 . 5 4 < 0 . 5 4 < 0 . 5 4 3 . 7 J 4 . 6 J 4 . 2 J 6 . 4 J 7 . 1 J 6 . 7 J < 0 . 5 4 < 0 . 5 4 < 0 . 5 4 Th a l l i u m 0 . 0 5 5 . 5 0 . 2 8 * 2 0 . 4 7 0 . 0 7 J < 0 . 0 5 0 . 1 J 0 . 1 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 0 7 J < 0 . 0 5 0 . 0 6 J 0 . 0 7 J Va n a d i u m 0 . 3 6 2 5 0 . 3 * N E N E 0 . 5 3 J 1 . 4 J 0 . 9 1 J 1 . 3 J 1 . 7 J < 0 . 3 6 < 0 . 3 6 7 . 4 J 3 . 2 J 2 . 8 J 2 . 2 J 2 . 6 J 4 . 3 J 3 . 5 J 1 . 3 J 7 . 5 J Zi n c 1 . 6 1 1 0 1 0 0 0 5 0 0 0 5 0 5 8 1 . 7 J 4 0 7 5 < 1 . 6 1 < 1 . 6 1 4 . 3 J 3 J < 1 . 6 1 4 . 6 J 5 . 4 J 1 2 2 4 6 . 4 J < 1 . 6 1 1 5 NO T E : MD L - Me t h o d D e t e c t i o n L i m i t SW S L - So l i d W a s t e S e c t i o n Q u a n t i t a t i o n L i m i t s 2L - Gr o u n d w a t e r S t a n d a r d s ( 1 5 A N C A C 2 L 0 2 0 0 ) GW P - Gr o u n d w a t e r P r o t e c t i o n S t a n d a r d s ( n o t e d b y * ) MC L - Fe d e r a l M a x i m u m C o n t a m i n a n t L i m i t 2B - NC A C 2 B S t a n d a r d f o r C l a s s C w a t e r s Bo l d - De t e c t i o n a b o v e 2 L o r G W P S t a n d a r d J- La b o r a t o r y d e f i n e d v a l u e d e t e c t e d b e t w e e n t h e M D L a n d S W S L l i m i t < M D L - No t d e t e c t e d a t o r a b o v e M D L NE - S t a n d a r d N o t E s t a b l i s h e d Ta b l e u n i t s a r e p r e s e n t e d i n u g / l . La b a n a l y s i s b y E n v i r o n m e n t 1 , I n c . , r e p o r t d a t e d 5 / 3 1 / 2 0 1 6 , C l i e n t I D # 6 0 0 8 Cl o s e d M S W C & D S u r f a c e W a t e r H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ P a s q u o t a n k \ 0 6 A p r i l 2 0 1 6 \ A p r i l 1 6 p q t g w t a b l e s . x l s x Th i s p a g e i n t e n t i o n a l l y l e f t b l a n k . Ta b l e 4 De t e c t e d O r g a n i c C o n s t i t u e n t s Pa s q u o t a n k C o u n t y L a n d f i l l Ap r i l 2 6 , 2 0 1 6 By: MG Date: 6/16/2016 Mo n i t o r i n g L o c a t i o n M D L S W S L 2 L S t a n d a r d M C L M W - 1 M W - 2 M W - 7 M W - 9 M W - 9 A M W - 1 1 A M W - 1 2 Be n z e n e 0 . 2 4 1 1 5 < 0 . 2 4 < 0 . 2 4 < 0 . 2 4 0 . 5 J 0 . 5 J < 0 . 2 4 0 . 4 J 1, 4 D i c h l o r o b e n z e n e 0 . 3 9 1 6 7 5 < 0 . 3 9 0 . 5 J < 0 . 3 9 < 0 . 3 9 < 0 . 3 9 < 0 . 3 9 < 0 . 3 9 Ca r b o n D i s u l f i d e 0 . 2 3 1 0 0 7 0 0 N E 0 . 3 J < 0 . 2 3 0 . 3 J < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 Ch l o r o b e n z e n e 0 . 3 0 3 5 0 1 0 0 < 0 . 3 2 J < 0 . 3 < 0 . 3 < 0 . 3 < 0 . 3 < 0 . 3 Ci s - 1 , 2 - D i c h l o r o e t h e n e 0 . 2 5 5 7 0 7 0 < 0 . 2 5 < 0 . 2 5 < 0 . 2 5 < 0 . 2 5 0 . 3 J < 0 . 2 5 < 0 . 2 5 Te t r a h y d r o f u r a n 0 . 3 9 N E N E N E < 0 . 3 9 1 . 6 < 0 . 3 9 4 . 9 6 . 9 1 . 8 2 . 3 NO T E MD L - Me t h o d D e t e c t i o n L i m i t SW S L - So l i d W a s t e S e c t i o n Q u a n t i t a t i o n L i m i t s 2L - Gr o u n d w a t e r S t a n d a r d s ( 1 5 A N C A C 2 L 0 2 0 0 ) MC L - F e d e r a l M a x i m u m C o n t a m i n a n t L i m i t Bo l d - De t e c t i o n a b o v e 2 L s t a n d a r d o r G W P s t a n d a r d J- La b o r a t o r y d e f i n e d v a l u e d e t e c t e d b e t w e e n t h e M D L a n d S W S L l i m i t <M D L - No t d e t e c t e d a t o r a b o v e M D L NE - No t E s t a b l i s h e d Ta b l e u n i t s a r e p r e s e n t e d i n u g / l . MW - 1 , M W - 2 a n d M W - 7 a r e r e l a t e d t o t h e C l o s e d M S W L a n d f i l l . MW - 9 , M W - 9 A , M W - 1 1 A a n d M W - 1 2 a r e r e l a t e d t o t h e C & D l a n d f i l l . La b a n a l y s i s b y E n v i r o n m e n t 1 , I n c . r e p o r t d a t e d 5 / 3 1 / 2 0 1 6 , I D # 6 0 0 8 H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ P a s q u o t a n k \ 0 6 A p r i l 2 0 1 6 \ A p r i l 1 6 p q t g w t a b l e s . x l s x Ta b l e 5 Gr o u n d w a t e r V e l o c i t y Pa s q u o t a n k C o u n t y L a n d f i l l Ap r i l 2 6 , 2 0 1 6 By:MG Date:6/20/2016 Mo n i t o r i n g Lo c a t i o n Gr o u n d w a t e r El e v a t i o n ( f e e t ) Hy d r a u l i c Co n d u c t i v i t y (c m / s e c ) Po r o s i t y (% ) Gr a d i e n t Ve l o c i t y (c m / s e c ) Ve l o c i t y (f t / d a y ) MW - 1 6. 9 2 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 4 2 2 . 6 7 1 E - 0 7 7 . 5 7 E - 0 4 MW - 2 4. 2 8 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 8 8 5 . 5 9 7 E - 0 7 1 . 5 9 E - 0 3 MW - 3 3. 6 2 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 3 8 2 . 4 1 7 E - 0 7 6 . 8 5 E - 0 4 MW - 4 5. 8 3 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 2 1 1 . 3 5 2 E - 0 7 3 . 8 3 E - 0 4 MW - 5 4. 6 4 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 4 0 2 . 5 4 4 E - 0 7 7 . 2 1 E - 0 4 MW - 6 6. 0 8 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 3 7 2 . 3 2 2 E - 0 7 6 . 5 8 E - 0 4 MW - 7 6. 6 9 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 5 9 . 2 8 6 E - 0 8 2 . 6 3 E - 0 4 MW - 8 6. 6 9 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 3 5 2 . 2 2 6 E - 0 7 6 . 3 1 E - 0 4 MW - 1 0 A 4. 1 5 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 8 8 5 . 5 9 7 E - 0 7 1 . 5 9 E - 0 3 MW - 1 1 A 5. 2 4 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 4 0 2 . 5 4 4 E - 0 7 7 . 2 1 E - 0 4 MW - 1 2 4. 4 8 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 3 8 . 2 6 9 E - 0 8 2 . 3 4 E - 0 4 Av e r a g e V e l o c i t y : 2. 4 7 7 E - 0 7 7 . 0 2 E - 0 4 NO T E : 1. W a t e r l e v e l d a t a c o l l e c t e d b y E n v i r o n m e n t 1 p e r s o n n e l . 3. V e l o c i t y C a l c u l a t e d f r o m V = K * i / n V = v e l o c i t y K = H y d r a u l i c C o n d u c t i v i t y i = G r a d i e n t n = P o r o s i t y 2. H y d r a u l i c C o n d u c t i v i t y a n d p o r o s i t y v a l u e s a v e r a g e d f r o m S & M E 9 / 2 3 / 1 9 8 2 Ge o t e c h n i c a l I n v e s t i g a t i o n R e p o r t ; b o i n g l o c a t i o n s B - 1 a n d B - 3 . H: \ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ P a s q u o t a n k \ 0 6 A p r i l 2 0 1 6 \ A p r i l 1 6 p q t g w t a b l e s . x l s x Appendix A Well Logs April 2016 Groundwater Monitoring Reports Pasquotank Closed Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank. This page intentionally left blank. Appendix B Laboratory Analytical Reports April 2016 Groundwater Monitoring Report Pasquotank County Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank.