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HomeMy WebLinkAbout7002_PasquotankMSWLF_20141002_GWMonReport_DIN22554This page intentionally left blank. October 2014 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 November 2014 Prepared by: © 2014 Smith Gardner, Inc. This document is intended for the sole use of the client for which it was prepared and for the purpose agreed upon by the client and Smith Gardner, Inc. This page intentionally left blank. This page intentionally left blank. Pasquotank County Landfill October 2014 - Groundwater Monitoring Report November 2014 Table of Contents Page i Pasquotank County Landfill NC Solid Waste No. 70-02 October 2014 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 Parameter Results Table 3 Detected Inorganic Constituents Table 4 Detected Organic Constituents Table 5 Groundwater Velocity APPENDICES Appendix A Well Logs Appendix B Laboratory Analytical Reports Pasquotank County Landfill October 2014 - Groundwater Monitoring Report November 2014 Table of Contents Page ii This page intentionally left blank. Pasquotank County Landfill October 2014 - Groundwater Monitoring Report November 2014 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 October 2, 2014; 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 The sampling event, performed by Environment 1, Inc. included sample collection from both the closed MSW and C&D landfills. Thirteen total groundwater monitoring wells were sampled in accordance with NCDENR groundwater monitoring guidance and the approved site Water Quality Monitoring Plan (revised February 20142). 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 and MW-11A) for the C&D landfill, two surface water locations (SW-1 and SW-2) and one basin (Basin 1) were monitored this event. Available well logs are provided in Appendix A. The C&D monitoring well MW-12 was damaged early in 2014. This well was replaced with a new well immediately adjacent to the old well prior to this groundwater monitoring event. Following installation the new well was surveyed for location and elevation. Sample locations are shown on Figure 1. 4.0 SAMPLING PROCEDURES Sampling methods followed the protocol outlined in the Water Quality Monitoring Plan and the North Carolina Water Quality Monitoring Guidance Document for Solid Waste Facilities (North Carolina Department of Environment and Natural Resources, Division of Waste Management). The depth to water in each well was gauged prior to purging and sampling and is presented in Table 1. 1 S&ME Geotechnical Investigation Report, letter to Mr. Bill Richardson, September 23, 1982. 2 Water Quality Monitoring Plan, Pasquotank County Landfill, February 2014, Smith Gardner, Inc., approved February 27, 2014 DIN: 20658 Pasquotank County Landfill October 2014 - Groundwater Monitoring Report November 2014 Page 2 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). 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., in Greenville, NC, a North Carolina certified laboratory (NC Wastewater ID #10). Samples were analyzed for the Appendix I VOCs via EPA Test Method 8260B, metals via EPA Test Method 200.8 and tetrahydrofuran by the approved SWS method listed in the laboratory report. 5.3 Laboratory Results Analytical results were compared to the NCDWM Solid Waste Section Quantitation Limits (SWSLs), 15A NCAC 2L.0200 (2LStandard) and Federal Maximum Contaminant Limits (MCL) for groundwater samples and the 15 A NCAC 2B Standard for Class C waters (2B Standards) for surface water samples. Most constituents were either below the method detection limit (MDL) or were identified by the laboratory as ‘‘J-values’’ indicating a non-quantifiable value. 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 The inorganic constituents arsenic (MW-2 and MW-6) and cobalt (MW-6) were detected above their 2L Standards in samples for this event. 5.3.1.2 C&D The inorganic constituents arsenic (MW-9, MW-9A, and MW-11A) and cobalt (MW-9A, MW-11A and MW-12) were detected above their 2L Standards in samples collected this event. Pasquotank County Landfill October 2014 - Groundwater Monitoring Report November 2014 Page 3 5.3.2 Organic Constituents Detected organic constituents (VOCs) are presented in Table 4. 5.3.2.1 Closed MSW Concentrations of tetrahydrofuran were reported in samples from MW-2 and MW-5. No constituents were reported at concentrations above their 2L Standards. 5.3.2.2 C&D Tetrahydrafuran concentrations were reported in samples collected from MW-8, MW-9, MW-9A and MW-12. No constituents were reported at concentrations above their 2L Standards. 5.3.3 Surface Water Samples No inorganic or organic constituents had reported concentrations in surface water or basin samples above their 2B Standards. 6.0 GROUNDWATER CHARACTERIZATION Groundwater across the site was recorded from 6 to 10 feet below ground surface (bgs), which is consistent with coastal counties and previous site records3. 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 data from their Geotechnical Investigation Report4. Groundwater flow velocities ranged from 1.8 x 10-4 ft/day (MW-6) to 6.61 x 10-3 ft/day (MW-5) and averaged 1.24 x 10-3 fy/day. Calculated flow velocities are included in Table 5. The potentiometric surface map is presented as Figure 1. 3 Report of Subsurface Investigation and Geotechnical Engineering Services, GET Solutions, Inc., prepared for McDowell & Associates Pasquotank County C&D Landfill Expansion, April 19, 2013. 4 Geotechnical Investigation Report, Soil & Material Engineers, Inc., Pasquotank County Landfill, September 23, 1982 Pasquotank County Landfill October 2014 - Groundwater Monitoring Report November 2014 Page 4 7.0 CONCLUSIONS Laboratory results indicate that water quality at the Pasquotank County Landfill is generally consistent with reported historical detections. The next groundwater monitoring event is scheduled for April 2015. Results will be reported to NCDENR after receipt and analysis of laboratory data. FIGURE October 2014 Groundwater Monitoring Report Pasquotank County Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank. 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 QU O T A N K - D 0 0 0 3 . d w g - 1 1 / 1 7 / 2 0 1 4 1 : 3 4 P M SEAL SEAL 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. © 2014 Smith Gardner, Inc.    PASQUOTANK COUNTY  NORTH CAROLINA  SOILD WASTE DEPARTMENT     PASQUOTANK COUNTY WATER QUALITY MONITORING PLAN       GROUNDWATER POTENTIOMETRIC MAP OCTOBER 2014     J.A.S. T.R.S. PASQUOTANK 13-1 AS SHOWN OCTOBER 2014 PASQUOTANK-D0003    FIG. 1 MW-1 150' 300' 450'0 GWE DTW TOC * MW-12 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 October 2014 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 Oc t o b e r 2 , 2 0 1 4 By: MG Date: 10/30/14 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 c h e s ) To t a l W e l l De p t h ( f t bg s ) Gr o u n d Su r f a c e El e v a t i o n ( f t a m s l ) 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 ) 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 e e 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 0 . 0 1 0 . 2 0 1 2 . 6 2 8 . 1 4 4 . 4 8 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 1 0 . 5 0 1 3 . 1 7 1 0 . 0 0 3 . 1 7 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 . 0 8 . 2 0 9 . 9 2 7 . 9 5 1 . 9 7 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 2 0 . 0 9 . 5 0 1 1 . 3 7 7 . 2 0 4 . 1 7 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 4 . 0 9 . 0 0 9 . 9 4 6 . 2 2 3 . 7 2 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 4 . 9 1 0 . 2 0 1 1 . 1 2 6 . 8 0 4 . 3 2 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 1 4 . 0 1 0 . 5 0 1 3 . 4 8 8 . 9 3 4 . 5 5 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 . 5 9 . 2 0 1 0 . 6 9 6 . 3 3 4 . 3 6 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 1 3 . 0 9 . 0 0 1 1 . 1 4 6 . 3 1 4 . 8 3 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 0 . 0 0 9 . 0 0 1 1 . 1 1 6 . 4 5 4 . 6 6 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 9 . 4 4 2 . 9 8 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 0 . 0 8 . 2 0 1 1 . 8 6 7 . 7 9 4 . 0 7 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 0 . 0 1 0 . 2 0 1 2 . 1 8 9 . 0 2 3 . 1 6 5 - 2 0 s a n d NO T E : 1. ) G r o u n d w a t e r d e p t h s m e a s u r 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 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. ) N A = n o t a v a i l a b l e 7. ) * 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 1 0 / 2 9 / 2 0 1 4 , C l i e n t I D # 6 0 0 8 8. ) 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 c 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 3 O c t 2 0 1 4 \ o c t 1 4 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 Oc t o b e r 2 , 2 0 1 4 By: MG Date:10/30/2014 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 7 4 2 2 MW - 2 6 . 4 7 5 0 2 1 MW - 5 6 . 3 4 2 9 2 3 MW - 6 5 . 7 5 5 6 2 2 MW - 7 6 . 3 5 7 4 2 2 C& D L a n d f i l l MW - 3 6 . 2 5 3 0 1 9 MW - 4 6 8 9 6 1 9 MW - 8 6 1 2 0 1 2 1 MW - 9 6 2 6 4 0 2 1 MW - 9 A 6 2 8 5 0 2 0 MW - 1 0 A 5 . 8 8 9 8 2 0 MW - 1 1 A 5 . 7 1 5 2 0 2 2 MW - 1 2 5 . 3 1 2 6 0 2 2 Su r f a c e W a t e r SW - 1 7 . 1 1 2 0 2 3 SW - 2 8 . 8 3 8 8 2 4 Ba s i n 1 6 . 3 9 7 2 3 No t e : Fi 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 . Pr e s e n t e d i n 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 1 0 / 2 9 / 2 0 1 4 , 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 3 O c t 2 0 1 4 \ o c t 1 4 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 Oc t o b e r 2 , 2 0 1 4 By: MG Date: 11/19/2014 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 2 B S t a n d a r d M W - 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 . 1 2 6 1 * 6 6 4 0 < 0 . 1 2 < 0 . 1 2 0 . 1 2 J < 0 . 1 2 0 . 7 2 J < 0 . 1 2 < 0 . 1 2 < 0 . 1 2 < 0 . 1 2 0 . 1 5 J < 0 . 1 2 < 0 . 1 2 < 0 . 1 2 < 0 . 1 2 < 0 . 1 2 < 0 . 1 2 Ar s e n i c 0 . 1 0 1 0 1 0 1 0 1 0 0 . 2 9 J 74 3. 6 J 12 3. 5 J < 0 . 1 0 < 0 . 1 0 6 . 8 J 60 1 1 7 8 J 23 1.7 J 1 . 1 J 1 . 8 J 1 . 2 J Ba r i u m 0 . 1 2 1 0 0 7 0 0 2 0 0 0 2 0 0 0 0 0 0 2 5 . 4 J 1 2 2 5 8 . 5 J 5 2 . 9 J 4 8 . 3 J 1 0 . 6 J 2 5 . 2 J 7 1 . 2 J 2 9 . 6 J 7 4 . 9 J 8 8 . 3 J 9 9 . 4 J 2 6 . 4 J 1 5 . 7 J 3 3 . 5 J 2 5 . 4 J Be r y l l i u m 0 . 0 4 1 4 * 4 6 . 5 0 . 1 3 J < 0 . 0 4 0 . 0 5 J < 0 . 0 4 < 0 . 0 4 < 0 . 0 4 0 . 1 4 J 0 . 2 3 J 0 . 2 5 J 0 . 0 8 J 0 . 0 7 J 0 . 0 6 J 0 . 1 5 J < 0 . 0 4 < 0 . 0 4 < 0 . 0 4 Ca d m i u m 0 . 0 4 1 2 5 2 < 0 . 0 4 < 0 . 0 4 0 . 1 4 J 0 . 0 9 J 0 . 0 5 J < 0 . 0 4 < 0 . 0 4 0 . 1 0 J 0 . 0 7 J 0 . 0 5 J 0 . 1 0 J 0 . 1 8 J 0 . 8 0 J < 0 . 0 4 < 0 . 0 4 < 0 . 0 4 Co b a l t 0 . 1 2 1 0 1 * N E 2 7 0 1 . 1 J 3 . 0 J 0 . 9 9 J 22 0. 2 9 J < 0 . 1 2 3 . 0 J 0 . 6 2 J 1 . 3 J 15 1.5 J 72 1 4 1 0.12 J 0 . 2 1 J 0 . 5 9 J Co p p e r 0 . 1 0 1 0 1 0 0 0 1 3 0 0 7 0 . 5 6 J 0 . 3 6 J 7 . 7 J 0 . 3 6 J 7 . 9 J 0 . 3 6 J 0 . 6 7 J 1 . 2 J 0 . 6 2 J 0 . 8 9 J 0 . 5 4 J 0 . 7 1 J 1 . 9 J 1 . 3 J 0 . 5 1 J 4 . 8 J Ch r o m i u m , t o t a l 0 . 1 4 1 0 1 0 1 0 0 5 0 0 . 9 0 J 0 . 7 4 J 2 . 3 J 0 . 3 5 J 1 . 0 J < 0 . 1 4 < 0 . 1 4 6 . 7 J 1 . 7 J 0 . 5 5 J 0 . 4 5 J 0 . 7 0 J < 0 . 1 4 0 . 5 3 J 0 . 6 2 J 1 . 7 J Le a d 0 . 1 3 1 0 1 5 1 5 2 5 < 0 . 1 3 < 0 . 1 3 2 . 0 J < 0 . 1 3 1 . 2 J < 0 . 1 3 < 0 . 1 3 0 . 2 4 J < 0 . 1 3 < 0 . 1 3 < 0 . 1 3 0 . 1 4 J 0 . 2 9 J 0 . 2 1 J < 0 . 1 3 1 . 6 J Ni c k e l 0 . 1 2 5 0 1 0 0 N E 8 8 2 . 4 J 1 . 8 J 3 . 7 J 4 . 3 J 3 . 2 J 0 . 4 8 J 4 . 5 J 4 . 2 J 4 . 4 J 9 . 6 J 1 . 9 J 1 0 . 6 J 4 2 . 2 J 1 . 1 J 1 . 6 J 2 . 3 J Se l e n i u m 0 . 1 6 1 0 2 0 5 0 5 0 . 4 0 J 0 . 5 3 J 0 . 2 1 J 2 . 0 J 0 . 5 1 J < 0 . 1 6 < 0 . 1 6 1 . 8 J 3 . 4 J 3 . 6 J 1 . 7 J 5 . 1 J 3 . 9 J 0 . 3 8 J 0 . 6 0 J 0 . 5 7 J Va n a d i u m 0 . 0 6 2 5 0 . 3 * N E N E 0 . 4 6 J 0 . 8 4 J 6 . 8 J 1 . 0 J 3 . 5 J 0 . 1 0 J 0 . 3 5 J 8 . 0 J 2 . 5 J 3 . 7 J 1 . 9 J 2 . 6 J 2 . 2 J 0 . 9 3 J 0 . 5 5 J 3 . 0 J Zi n c 0 . 5 3 1 0 1 0 0 0 5 0 0 0 5 0 5 . 6 J < 0 . 5 3 5 2 1 6 2 . 6 J < 0 . 5 3 5 . 7 J 1 . 7 J 3 . 0 J 3 . 9 J 0 . 6 8 J 1 1 2 7 1 . 2 J < 0 . 5 3 8 . 6 J NO T E : 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 MD L - Me t h o d D e t e c t i o n 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 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 - 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 d a t a 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 1 0 / 2 9 / 2 0 1 4 , C l i e n t I D # 6 0 0 8 Cl o s e d M S W Surface Water C&D 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 3 O c t 2 0 1 4 \ o c t 1 4 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 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 Oc t o b e r 2 , 2 0 1 4 By: MG Date: 11/19/2014 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 - 2 M W - 5 M W - 8 M W - 9 M W - 9 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 . 6 0 J 0 . 5 0 J < 0 . 2 4 1, 4 D i c h l o r o b e n z e n e 0 . 3 9 1 6 7 5 1 . 3 < 0 . 3 9 < 0 . 3 9 < 0 . 3 9 < 0 . 3 9 < 0 . 3 9 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 . 4 0 J < 0 . 2 5 < 0 . 2 5 Ch l o r o b e n z e n e 0 . 3 0 3 5 0 1 0 0 5 . 4 < 0 . 3 0 < 0 . 3 0 < 0 . 3 0 < 0 . 3 0 < 0 . 3 0 Te t r a h y d r o f u r a n 0 . 3 9 N E N E N E 2 . 4 1 . 4 0 . 8 0 J 7 . 3 6 1 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- De t e c t e d b e t w e e n 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 - 2 a n d M W - 5 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 - 8 , M W - 9 , M W - 9 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 d a t a 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 1 0 / 2 9 / 2 0 1 4 , 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 3 O c t 2 0 1 4 \ o c t 1 4 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 Oc t o b e r 2 , 2 0 1 4 By: MG Date:11/24/2014 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 4. 4 8 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 3 8 . 4 8 E - 0 8 2 . 4 0 E - 0 4 MW - 2 3. 1 7 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 1 4 2 9 . 0 1 1 E - 0 7 2 . 5 5 E - 0 3 MW - 3 1. 9 7 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 2 5 1 . 5 9 E - 0 7 4 . 5 1 E - 0 4 MW - 4 4. 1 7 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 1 7 . 2 1 3 E - 0 8 2 . 0 4 E - 0 4 MW - 5 3. 7 2 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 3 6 7 2 . 3 3 2 E - 0 6 6 . 6 1 E - 0 3 MW - 6 4. 3 2 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 0 6 . 3 6 E - 0 8 1 . 8 0 E - 0 4 MW - 7 4. 5 5 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 4 2 2 . 6 5 E - 0 7 7 . 5 1 E - 0 4 MW - 8 4. 3 6 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 3 8 . 2 4 5 E - 0 8 2 . 3 4 E - 0 4 MW - 1 0 A 2. 9 8 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 1 1 7 . 0 6 7 E - 0 8 2 . 0 0 E - 0 4 MW - 1 1 A 4. 0 7 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 5 8 3 . 7 1 E - 0 7 1 . 0 5 E - 0 3 MW - 1 2 3. 1 6 2 . 7 4 E - 0 5 0 . 4 3 0 . 0 0 6 7 4 . 2 4 E - 0 7 1 . 2 0 E - 0 3 NO T E : 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 1 . 8 0 E - 0 4 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 Wa 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 . Hy 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 3 O c t 2 0 1 4 \ o c t 1 4 p q t g w t a b l e s . x l s x Appendix A Well Logs October 2014-Groundwater Monitoring Reports Pasquotank Closed Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank. Appendix B Laboratory Analytical Reports October 2014 Groundwater Monitoring Report Pasquotank County Landfill NC Solid Waste Permit No. 70-02 This page intentionally left blank.