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HomeMy WebLinkAbout9301_WarrenCounty_MSWLF_GWMReport_9/18/15.pdfThis page intentionally left blank. September 2015 Groundwater Monitoring Report Warren County Landfill Facility NC Solid Waste Permit No. 93-01 Prepared for: Warren County Public Works Warrenton, North Carolina November 2015 Prepared by: © 2015 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. Warren County Landfill September 2015 Groundwater Monitoring Report November 2015 Table of Contents Page i Warren County Landfill NC Solid Waste Permit No. 93-01 September 2015 Groundwater Monitoring Report Table of Contents Page 1.0 INTRODUCTION ......................................................................................................... 1  2.0 SITE GEOLOGY ........................................................................................................... 1  3.0 SAMPLING LOCATIONS ............................................................................................. 1  4.0 SAMPLING PROCEDURES ......................................................................................... 1  5.0 FIELD AND LABORATORY RESULTS .......................................................................... 2  5.1 Field Results .............................................................................................................. 2  5.2 Laboratory Analysis ................................................................................................... 2  5.3 Laboratory Results .................................................................................................... 2  5.3.1 Inorganic Constituents .................................................................................. 2  5.3.2 Organic Constituents .................................................................................... 3  5.3.3 Surface Water Results .................................................................................. 3  6.0 GROUNDWATER CHARACTERIZATION ...................................................................... 3  7.0 CONCLUSIONS .......................................................................................................... 3  FIGURES Figure 1 Well Location Map TABLES Table 1 Groundwater Elevations Table 2 Field Parameters Table 3 Detected Inorganic Constituents Table 4 Detected Organic Constituents APPENDICES Appendix A Well Logs Appendix B Laboratory Analytical Results This page intentionally left blank. Warren County Landfill September 2015 Groundwater Monitoring Report November 2015 Page 1 1.0 INTRODUCTION The Warren County Landfill, Solid Waste Permit # 93-01, is required to perform semi-annual groundwater monitoring in accordance with Solid Waste Section Rule 15A NCAC 13B.0544. The facility includes a closed, unlined MSW landfill and an active transfer station. The County also conducts several other solid waste management activities at the facility including the collection and processing of white good/scrap metal, the collection of used tires, and the operation of a land clearing and inert debris (LCID) landfill. This report presents the results from the groundwater monitoring event performed September 18, 2015; and includes laboratory analyses, summary tables and laboratory analytical reports. 2.0 SITE GEOLOGY The Warren County Landfill is located approximately 0.7 miles southeast of Warrenton, NC in the eastern portion of the Piedmont Physiographic Province1. The regional geology consists of fractured and folded igneous and metamorphic rocks overlain by saprolite, alluvial deposits and topsoil. The bedrock in this area is part of the Raleigh Belt which is predominantly granitic intrusive rocks and felsic metamorphic rocks. Unconsolidated sediments at the site consist of residual soils and saprolite. These generally consist of silty micaceous sands and silts. Bedrock was encountered at the site at depths ranging from 15 to 28 feet below grade in groundwater monitoring wells MW-2 and MW-32. Samples at the time of drilling indicated the bedrock is mica schist. Site surface drainage is generally north towards tributaries of Possum Quarter Creek. 3.0 SAMPLING LOCATIONS The Warren County Landfill monitoring network includes four groundwater monitoring wells (MW-1A, MW-2, MW-3 and MW-4) and three surface water locations (SW-1, SW-2 and SW-3) for the facility. SW-1 was not sampled this event because it was dry. MW-1A serves as the facility background well. Available well logs and related well construction information are presented in Appendix A. 4.0 SAMPLING PROCEDURES Smith Gardner, Inc. (S+G) personnel conducted the monitoring network sampling event September 18, 2015. Reported sampling methods followed the protocol outlined in the North Carolina Water Quality Monitoring Guidance Document for Solid Waste Facilities (NCDENR, DWM). The depth to water in each well was gauged to determine groundwater depth then purged three to five well volumes or until dry. Water table elevations are presented in Table 1. 1 ‘‘Butler, J. Robert and Secor, Donald T. Jr. ‘‘The Central Piedmont’’, Geology of the Carolinas, Horton and Zullo. The University of Tennessee Press. 1991. p 59-78. 2 Westinghouse Environmental and Geotechnical Services, Inc. ‘‘Subsurface Investigation and Monitor Well Installation Report Warren County Landfill’’, January 1990. Warren County Landfill September 2015 Groundwater Monitoring Report November 2015 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 (Prism Laboratories, Inc. NC Certification 402), within the specified hold times for each analysis. 5.0 FIELD AND LABORATORY RESULTS 5.1 Field Results Field measurements for groundwater depth, pH, temperature, turbidity and specific conductance were collected for each location sampled during this monitoring event and are included in Table 2. 5.2 Laboratory Analysis Samples were transported to Prism’s laboratory facility in Charlotte, NC under proper chain of custody and analyzed for Appendix I constituents, including metals and VOCs using the SWS approved methods indicated on the laboratory report. The laboratory analytical report is included as Appendix B. 5.3 Laboratory Results Analytical results were compared to the NCDWM Solid Waste Section Quantitation Limits (SWSLs)3, 15A NCAC 2L.0200 (2LStandard) and the EPA established Federal Maximum Contaminant Limits (MCL) for groundwater samples; and the 15A NCAC 2B Standard for Class C waters (2B Standards) for surface water samples. Most constituents were reported either below the laboratory established reporting limit (RL) or were laboratory identified ‘‘J-values’’ indicating an estimated or non-quantifiable value. 5.3.1 Inorganic Constituents Chromium in MW-4 was the only inorganic parameter detected above its 2L Standard this event. The inorganic parameters cobalt and vanadium were reported above their GWP Standards in the samples from MW-1A, MW-2 and MW-4. Analysis for both chromium (MW-4) and zinc (MW-3) were qualified by the laboratory with detections in the associated blank. Detected inorganic constituents are presented in Table 3. 3 New Guidelines for Electronic Submittal of Environmental Monitoring Data Memo, NCDENR --- Solid Waste Section, October 27, 2006 Warren County Landfill September 2015 Groundwater Monitoring Report November 2015 Page 3 5.3.2 Organic Constituents Benzene, in the sample from MW-1A, was the only organic constituent with a reported detection at 1.2 μg/l this event, which is slightly above its 2L Standard. This is in line with historically reported results for benzene at this location. Detected organic parameters are presented in Table 4. 5.3.3 Surface Water Results No inorganic or organic parameters were reported at concentrations above their 2B Standards in facility surface water samples this event. 6.0 GROUNDWATER CHARACTERIZATION Groundwater was recorded from 5 to 10 feet below ground surface (bgs), except for MW-1A, where groundwater was 32 feet bgs. Depth to groundwater is consistent with previous site records4,5. Based on the 2013 USGS Warrenton 7.5 Minute quadrangle groundwater generally flows in a north northeasterly direction, towards Possumquarter Creek and its unnamed tributary. Hydraulic conductivity data is not available for these wells so ground water velocities could not be calculated. A site map is presented as Figure 1. 7.0 CONCLUSIONS Fall monitoring event results indicated detected concentrations of total chromium above the 2L Standard in samples collected this event. Chromium is naturally occurring in North Carolina soils, and sample turbidity influences results to be ‘‘biased high’’ due to these naturally occurring constituents. The organic constituent benzene was also detected in samples from MW-1A. These results are similar to previous sampling events. The next groundwater monitoring event is scheduled for March 2016. A report with laboratory analysis will be submitted to NCDENR in accordance with 15A NCAC 13B .0544. 4 First Semi-Annual 2015 Groundwater Monitoring, Resolve Environmental Services, PLLC, prepared for Warren County Landfill, March 25, 2015. 5 Subsurface Investigation and Monitor Well Installation Report, Westinghouse Environmentla and Geotechnical Services, Inc., prepared for Warren County Health Department, January 1990. This page intentionally left blank. FIGURE September 2015 Groundwater Monitoring Report Warren County Landfill Solid Waste Permit No. 93-01 This page intentionally left blank. G: \ C A D \ W a r r e n C o u n t y \ W a r r e n 1 5 - 1 \ s h e e t s \ W A R R E N - B 0 0 0 2 . d w g - 11 / 1 0 / 2 0 1 5 2 : 0 0 P M 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 September 2015 Groundwater Monitoring Report Warren County Landfill Solid Waste Permit No. 93-01 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 Wa r r e n C o u n t y L a n d f i l l Se p t e m b e r 1 8 , 2 0 1 5 By: MG Date: 10/08/2015 We l l 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 We l l De p t h ( f t b g s) Gr o u n d Su r f a c e El e v a t i o n ( f t am 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 (f t b g s) Sc r e e n In t e r v a l (f e e t b g s ) Screen Geology MW - 1 A 8 / 1 8 / 1 9 9 7 3 6 . 3 8 8 0 9 5 3 6 7 8 . 1 4 6 5 6 7 7 5 2 4 0 3 7 3 . 2 4 3 7 5 . 2 4 3 2 . 5 6 3 4 2 . 6 8 3 0 - 4 0 s i l t y s a n d MW - 2 1 0 / 1 1 / 1 9 8 9 3 6 . 3 8 9 0 2 7 3 3 7 8 . 1 4 3 4 5 7 8 3 2 1 3 . 5 3 4 2 . 9 3 3 4 4 . 9 3 9 . 4 1 3 3 5 . 5 2 8 . 5 - 1 3 . 5 s i l t y s a n d MW - 3 1 0 / 1 0 / 1 9 8 9 3 6 . 3 8 8 5 3 0 0 6 7 8 . 1 4 2 0 3 5 8 3 2 2 7 3 0 6 . 5 5 3 0 8 . 5 5 6 . 2 8 3 0 2 . 2 7 1 7 - 2 7 s i l t y s a n d MW - 4 1 0 / 1 0 / 1 9 8 9 3 6 . 3 8 7 7 6 2 6 1 7 8 . 1 3 9 9 5 2 0 0 2 2 1 3 0 2 . 2 4 3 0 4 . 2 4 4 . 6 9 2 9 9 . 5 5 1 1 - 2 1 s a n d y s i l t No t e : 1. W e l l l o c a t i o n s a r e e s t i m a t e d f r o m R e s o l v e E n v i r o n m e n t a l S e r v i c e s , S i t e M a p , d a t e d 9 / 1 3 / 2 0 1 1 . 2. G r o u n d s u r f a c e e l e v a t i o n s e s t i m a t e d f r o m 2 0 0 4 D O T g r o u n d s u r f a c e c o n t o u r s . 3. T O C E l e v a t i o n s e s t i m a t e d 2 f o o t a b o v e g r o u n d s u r f a c e . 4. T o t a l w e l l d e p t h f r o m b o r i n g l o g s ( A p p e n d i x A ) . 5. D e p t h t o w a t e r m e a s u r e d b y S m i t h G a r d n e r , I n c . p e r s o n n e l 9 / 1 8 / 2 0 1 5 . 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 \ W a r r e n \ 1 . S e p t 2 0 1 5 \ S e p t 1 5 W a r r e n 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 Wa r r e n C o u n t y L a n d f i l l Se p t e m b e r 1 8 , 2 0 1 5 By: MG Date: 10/08/2015 We l l I d e n t i f i c a t i o n # Te m p e r a t u r e (° C e l s i u 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 ) pH ( S U ) Tu r b i d i t y (N T U ) MW - 1 A 21 . 3 5 0 5 . 5 4 75 . 5 MW - 2 19 . 6 1 3 0 5 . 7 7 90 . 4 MW - 3 20 . 6 1 2 0 6 . 2 6 2. 9 3 MW - 4 19 . 9 1 4 0 6 . 1 3 8. 4 1 SW - 2 20 . 1 1 2 0 6 . 2 5 14 . 7 SW - 3 20 . 1 1 4 0 7 . 2 6. 6 7 No t e : 1. F i e l d P a r a m e t e r s m e a s u r e d b y S m i t h G a r d n e r , I n c . p e r s o n n e l o n S e p t e m b e r 1 8 , 2 0 1 5 . 2. S W - 1 w a s d r y t h e f o r e n o t s a m p l e d t h i s e v e n t 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 \ W a r r e n \ 1 . S e p t 2 0 1 5 \ S e p t 1 5 W a r r e n 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 Wa r r e n C o u n t y L a n d f i l l Se p t e m b e r 1 8 , 2 0 1 5 By: MG Date: 10/08/2015 Co n s t i t u e n t M D L R L S W S L 2L o r GW P MC L 2 B M W - 1 A M W - 2 M W - 3 M W - 4 S W - 2 S W - 3 Ar s e n i c 0 . 2 9 0 1 1 0 1 0 1 0 1 0 B R L B R L 0 . 3 4 J B R L B R L B R L Ba r i u m 0 . 0 4 1 5 1 0 0 7 0 0 2 0 0 0 2 0 0 0 0 0 0 5 4 9 6 5 8 1 2 0 4 5 5 6 Be r y l l i u m 0 . 0 4 7 1 1 4 * 4 6 . 5 1 . 5 0 . 2 1 J 0 . 0 5 7 J 0 . 4 0 J B R L B R L Ca d m i u m 0 . 0 1 9 1 1 2 5 2 0 . 2 7 J 0 . 2 4 J 0 . 1 4 J 0 . 1 0 J 0 . 0 7 9 J 0 . 0 5 0 J To t a l C h r o m i u m 0 . 5 1 0 1 1 0 1 0 1 0 0 5 0 2 . 4 2 . 3 2 . 7 16 B 0. 7 7 J , B 0 . 7 0 J Co b a l t 0 . 0 1 3 1 1 0 1 * N E 4 13 3 7 0. 1 6 J 4. 3 2. 4 2 . 5 Co p p e r 0 . 4 4 0 5 1 0 1 0 0 0 1 3 0 0 7 6 . 7 3 . 5 J 0 . 9 9 J 1 8 0 . 4 4 J 0 . 6 7 J Le a d 0 . 0 2 0 1 1 0 1 5 1 5 2 5 5 . 7 1 . 4 0 . 1 8 J 2 . 4 0 . 0 9 6 J 0 . 1 8 Ni c k e l 0 . 0 5 3 2 5 0 1 0 0 N E 8 8 9 . 2 2 . 1 1 . 6 J 1 6 1 . 9 J 0 . 6 9 J Se l e n i u m 0 . 3 5 0 1 1 0 2 0 5 0 5 B R L B R L B R L 0 . 5 3 J B R L B R L Si l v e r 0 . 0 1 1 1 1 0 2 0 1 0 0 0 . 0 6 0 . 0 2 3 J 0 . 0 2 3 J 0 . 0 3 1 J 0 . 0 3 5 J B R L B R L Th a l l i u m 0 . 0 0 9 1 5 . 5 0 . 2 8 * 2 0 . 4 7 0 . 4 3 J 0 . 1 2 J B R L 0 . 0 5 8 J B R L B R L Va n a d i u m 2 . 5 0 0 5 2 5 0 . 3 * N E N E 6. 8 5 . 3 BR L 11 BR L B R L Zi n c 0 . 9 8 0 1 0 1 0 1 0 0 0 5 0 0 0 5 0 4 9 3 2 5 . 4 J , B 2 5 4 . 2 J , B 3 . 7 J , B No t e : M D L - Me t h o d D e t e c t i o n L i m i t Ta b l e D a t a i s p r e s e n t e d i n u g / l . RL Re p o r t i n g L i m i t a c h i e v e d b y l a b o r a t o r y An a l y s i s p r o v i d e d b y P r i s m L a b o r a t o r i e s , W O # 5 0 9 0 3 7 0 SW S L - S o 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 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 ( i d e n t i f i e d b y * ) 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 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 - C o n c e n t r a t i o n a b o v e 2 L o r G W P s t a n d a r d BR L - Co n s t i t u e n t n o t d e t e c t e d a b o v e t h e l a b o r a t r y e s t a b l i s h e d R L J - L a b o r a t o r y d e f i n e d a s d e t e c t e d b u t b e l o w t h e R L , t h e r e f o r e t h e v a l u e i s a n e s t i m a t e d c o n c e n t r a t i o n . B - N o t e d b y L a b o r a t o r y a s d e t e c t e d i n t h e a s s o c i a t e d c o n t r o l b l a n k NE - S t a n d a r d N o t E s t a b l i s h e 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 \ W a r r e n \ 1 . S e p t 2 0 1 5 \ S e p t 1 5 W a r r e n g w T a b l e s . x l s x 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 Wa r r e n C o u n t y L a n d f i l l Se p t e m b e r 1 8 , 2 0 1 5 By: MG Date: 10/08/2015 Co n s t i t u e n t s M D L R L S W S L 2 L M C L 2 B M W - 1 A M W - 2 M W - 3 M W - 4 S W - 2 1, 1 - D i c h l o r o e t h a n e 0 . 0 8 3 0 . 5 5 6 N E 1 0 0 B R L B R L 0 . 6 1 B R L B R L 1, 4 - D i c h l o r o b e n z e n e 0 . 0 5 0 0 . 5 1 6 7 5 1 0 0 2 . 4 1 . 5 0 . 7 B R L B R L Ac e t o n e 0 . 3 1 0 5 . 0 1 0 0 6 0 0 0 N E 2 0 0 0 4 . 3 J B R L B R L B R L B R L Be n z e n e 0 . 0 4 8 0 . 5 1 1 5 5 1 1. 2 0. 9 4 0 . 9 1 0 . 9 5 0 . 7 1 Ch l o r o b e n z e n e 0 . 0 6 2 0 . 5 3 5 0 1 0 0 1 4 0 B R L 0 . 5 5 0 . 5 9 B R L B R L Ch l o r o e t h a n e 0 . 2 2 0 0 . 5 1 0 3 0 0 0 N E N E B R L 0 . 9 1 B R L B R L B R L Ci s - 1 , 2 - D i c h l o r o e t h e n e 0 . 0 5 6 0 . 5 5 7 0 7 0 7 2 0 B R L 0 . 5 4 B R L B R L B R L Me t h y l e n e C h l o r i d e 0 . 0 8 3 1 . 0 1 5 N E 5 9 0 0 . 7 5 J B R L B R L B R L B R L To l u e n e 0 . 0 4 4 0 . 5 1 6 0 0 1 0 0 0 1 1 B R L B R L B R L B R L 0 . 7 o- X y l e n e 0 . 0 4 4 0 . 5 N E N E N E 6 0 0 0 . 7 2 B R L 0 . 7 1 BR L BRL Xy l e n e s ( t o t a l ) 0 . 1 5 0 3 . 0 5 5 0 0 1 0 0 0 0 6 7 0 0 . 7 2 J B R L 0 . 7 1 J B R L B R L No t e : MD L - Me t h o d D e t e c t i o n L i m i t RL - Re p o r t i n g L i m i t a c h i e v e d b y l a b o r a t o r y SW S L - S o 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 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 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 - C o n c e n t r a t i o n s r e p o r t e d a b o v e 2 L s t a n d a r d BR L - Co n s t i t u e n t n o t d e t e c t e d a b o v e t h e l a b o r a t r y e s t a b l i s h e d R L J - L a b o r a t o r y d e f i n e d a s d e t e c t e d b u t b e l o w t h e R L , t h e r e f o r e t h e v a l u e i s a n e s t i m a t e d c o n c e n t r a t i o n . Ta b l e d a t a i s p r e s e n t e d i n u g / l . An a l y s i s b y P r i s m L a b o r a t o r i e s , W O # 5 0 9 0 3 7 0 , R e p o r t D a t e d 1 0 / 2 / 2 0 1 5 Z: \ 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 \ 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 \ M a r t i n C o u n t y \ 8 . M a y 2 0 1 5 \ C o p y o f M a y 1 5 M a r t i n g w T a b l e s APPENDIX A Well Logs September 2015 Groundwater Monitoring Report Warren County Landfill Solid Waste Permit No. 93-01 This page intentionally left blank. This page intentionally left blank. APPENDIX B Laboratory Analytical Results September 2015 Groundwater Monitoring Report Warren County Landfill Solid Waste Permit No. 93-01 This page intentionally left blank. 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