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HomeMy WebLinkAboutAnnual Groundwater Moinitoring 2013 - PLN General - 3/26/2014 a 0 a� 2013 Annual Groun McEwan Prairie Facility Mason County,Washington 426 W. CEDAR ST, . Port Orchard Sand and Gravel Company .� - 00000 • GEOENGINEERS� lJ Earth Science+Technology 2013 ANNUAL GROUNDWATER MONITORING Mason County,Washington The monitoring plan calls for water quality sampling twice a year and quarterly water level measurements. Monitoring events for 2013 occurred on January 16, April 9, July 24 and October 29. Groundwater Levels GeoEngineers and Port Orchard Sand and Gravel measured groundwater levels in the monitoring wells and accessible piezometers previously installed on the property since August 26, 2004. Since then, groundwater levels were measured at a minimum of every quarter using calibrated water level probes. Water levels were measured and recorded relative to the rim of the PVC casing and converted to elevations relative to a surveyed site-specific datum. Groundwater Quality Monitoring GeoEngineers and Port Orchard Sand and Gravel collected quarterly samples of groundwater from the monitoring wells for standard laboratory analyses for gasoline- and diesel-range hydrocarbons (analytical methods NW-TPH-Gx and NW-TPH-Dx, respectively). We also collected in-field measurements of temperature, pH, specific conductivity and turbidity. Beginning in October 2012, all wells were sampled twice a year using low-flow techniques and dedicated sample tubing. Samples from 2013 were submitted to Spectra Laboratories in Tacoma,Washington. Surface Water Monitoring Surface water monitoring within the on-site wetlands was also conducted by GeoEngineers and Port Orchard Sand and Gravel personnel. Staff gages were installed in the four on-site wetlands and at Rex Lake. Surface water levels are monitored on a quarterly basis. Groundwater Use Monitoring Groundwater use monitoring is a component of the monitoring plan. However, no water has been withdrawn from the two existing water supply wells on site. No pumps have been installed in these wells. MONITORING RESULTS Groundwater Levels Hydrographs were developed for the piezometers and monitoring wells. For display purposes, the water level elevations for the piezometers and monitoring wells were grouped together. The water level elevations for the piezometers P-1 through P-6 are shown on Figure 3. The water level elevations for the monitoring wells MW-1 through MW-4 are shown on Figure 4. Figures 3 and 4 illustrate the seasonal fluctuation within the shallow groundwater. In 2013, groundwater levels fluctuated in a similar season pattern and within typical ranges as seen in previous years. Figure 5 shows the monthly and annual precipitation from National Oceanic and Atmospheric Administration's (NOAA) Wauna 3W Minter Creek weather station, located approximately 22 miles northwest of the site. The official record for NOAA's Wauna site only includes up to February 2013. Precipitation in 2013 has been below normal in the Puget Sound region, especially in November and December based on other weather data sources. Page 2 March 26,2014 GeoEngineers,Inc. File No.1355-023-01 2013 ANNUAL GROUNDWATER MONITORING Mason County,Washington Surface Water Levels A hydrograph was developed for the staff gages placed in Wetlands A through D and Rex Lake. The surface water level elevations are shown on Figure 6 dating back to 1998. The hydrograph shows that surface water occurs seasonally in the wetlands, mainly during the winter months. Water levels in Rex Lake fluctuate with the seasons. Comparing the lowest and highest measured water levels of 2013, the total fluctuation in Rex Lake was 3.6 feet between relative Elevation 276.95 and 280.55 feet, within the range of historical levels. Groundwater Quallty There have been 33 groundwater quality sampling events for the quarterly monitoring program. Petroleum hydrocarbons were not detected in analyzed groundwater samples from all sampling events in 2013 conducted on April 9 and October 29, 2013. In-field measurements in 2013 indicate that temperature, pH and specific conductivity results are generally within expected ranges. Turbidity is generally below 10 nephelometric turbidity unit(NTIJ) when using low-flow sampling techniques. SUMMARY GeoEngineers and Port Orchard Sand and Gravel performed groundwater monitoring between August 2004 and October 2013 at the McEwan Prairie Facility in general accordance with the monitoring plan submitted in the May 2002. Petroleum hydrocarbons were not detected in analyzed groundwater samples from all sampling events of 2013. Groundwater and surface water levels are highest during the months of March and April and lowest in the months of September and October based on the current and historical water monitoring. Groundwater levels fluctuated approximately 3 to 6 feet in 2013. Rex Lake fluctuated approximately 3.6 feet in 2013, similar in magnitude and timing with water levels in piezometer P-1, the closest groundwater monitoring point. This water level response to rainfall trends in groundwater, Rex Lake and the wetlands indicates a hydraulic connection between groundwater levels and on-site surface water levels. RECOMMENDATIONS Extraction of material at the McEwan Prairie Facility has been occurring since 2006. It is our opinion that the mining activity has had no measurable impact on the groundwater and surface water levels or groundwater quality based on the analysis of the monitoring data. GeoEngineers makes the following recommendations for McEwan Prairie Facility monitoring: ■ Continue quarterly monitoring of water levels in the piezometers, monitoring wells and wetlands. The most important months are April and October of each year, when the highest and lowest water levels, respectively, usually occur. We recommend that groundwater and surface water levels be measured in January,April,July and October of each year. GEOENGINEER� March 26,2014 Page 3 File No.1355-023-01 2013 ANNUAL GROUNDWATER MONITORING Mason County,Washington ■ We recommend that water quality sampling interval should continue to be conducted twice a year in April and October. If mining operations were to cease for more than six months, the sampling can be conducted once per year in October until mining operations resume at the site. A September 11, 2007 letter from Mason County Department of Community Development stated that if there were no detections of hydrocarbons after a calendar year, twice a year sampling would be allowed. No hydrocarbons were detected in 2008, 2009, 2011, 2012 and 2013. Twice-a-year sampling was implemented in 2012. in Continue low-flow sampling techniques to reduce the turbidity of samples by purging the wells at pumping rates as low as 0.1 L/min. LIMITATIONS GeoEngineers has performed this groundwater and wetland monitoring in general accordance with the scope and limitations of our proposal. Within the limitations of scope, schedule and budget, our services have been executed in accordance with the generally accepted practices for groundwater and wetland monitoring in this area at the time this report was prepared. No warranty or other conditions express or implied,should be understood. This report has been prepared for the exclusive use of Port Orchard Sand and Gravel Company, and authorized agents and regulatory agencies following the described methods and information available at the time of the work. No other party may rely on the product of our services unless we agree in advance to such reliance in writing. The information contained herein should not be applied for any purpose or project except the one originally contemplated. Page 4 March 26,2014 Geo Engineers,Inc. File No.1355-023-01 i � `N ' _ Lake Limerick r t r _ w Cranberry Lake� f t-0110 s Vir a" Afc Ewe Prsirl� Site Rex Lake' „•' z 6— I I ' Island Lake' Puget,sound/Pacific Ocean r� I AiPtE �✓ ... N -71 w. Wo— } s v E N Kit f LD Courtly W E 0 N S o2 i j)1 j. rn 3,000 0 3,000 Pierce N COUnty Feet n Vicinity Map s Notes 1.The locations of all features shown are approximate. 3 2.This drawing is for information purposes. It is intended to McEwan Prairie Facility assist in showing features discussed in an attached document. a GeoEngineers,Inc.cannot guarantee the accuracy and content Mason County, Washington = of electronic files. The master file is stored by GeoEngineers, 0 Inc.and will serve the official record this communication. S ° Data Sources: ESRI Data&Maps, Streetet GEO EN G I N E E R Figure Maps 2008. � 1 Projection: NAD 1983,UTM Zone 10 North. 3 ..- REX UKE , �•� 1 -�•� _ rli27-M ._ N T27ir3a E tO0fB14.d3 0 •'{- _ �+-" lam/ SEWN MARK 153-B ___ 7 I U-2919.62 TOP PVC 295.GRNG-294.1 %�tl 1 N 7[J89J D5 *JYDN afLl:3 I 'M E 100r32Y95 ;I IOP c5S-29.`a43 TOP 2'PMLti295.W, I q 11�I N T223239 Z TOP 6'CASING 29153 I E TOM23177 1 LidND=7910 r t �I N 713WPS9 E 1oo1Ja2.e1 �} RW 1'P"293.B7 i ��} PrT 1 UPLAND o I cram-290.% �R12 ul ' f7 270.0 I I N 71230J.3B 270..75 d uos WU 4 .'� t r N T0524.D6 DTI OP GSo=29194 1 E I0008174f + -E`1D006tl1f7+� EE 1000622.17 o YOP 2'PItk29S66 E i010µ0�.0 m P-2 '-. YIENAN •C•A I 1 f N PVC I N I I OiND-0'.T�'a2l7.SB S/i+N0=264.15 I ! \ll o f N n339Bn.3D I N TiS47,1H MY 1 E 1000af 1.S6 E 1000621 fY RT 2 MET -T 268.42 A �� N 71f4/Q9a ET19 1 AFF GAUGE OP-4 F 100064p'!d 1 N 4 4Z" TOPiAVMAIIXED 1'PVC 297.2E O / A 1K TLANO'O' 1 1 E I 57 GRND-2MI rAFF GAl/0F . y _ N 71313A32 I. �`� WIN VIELL 1 - E 1000295.67 N 77 TOP cs, 27559 E 100A24316 "TOP 2'PYC-27506 3 - ---- -- N To126.a E 100064.04 REITA 1 YaMfp��9.47 j' �1 j \-STAFT O UG O P-6LEGEN SGWO-� I TOP PVC ESQ=2M 96 N 71 J419.74 I(2004) GRNO-��% 1 • YDWTORVIG IIELL E 999%J.7B E 99WOO a o PfE20ME7ER(f9%) I -YON HELL 2 I TOP C56-2115.96 • TOP 2�PD 85.5J Lj r1EaAND STAFF'CAQ(1998) N T1416.60 -j l li ♦ NFiLA/D SIJRVEI'PONT(1004) £999421.55 - OI O ---PROPERTY BOUNDARY - M N NOTE 400 0 400 M j1.F1G VA lIfY6 Frl1 PIELOIE IkiLS(19%)ANE DA/fAr;IpMY7ITAi DA11JN IS NAD N/!I PBBI O AT TOP of t'PYC Q BASIS OF WRTWAL DATUM IS PER U 2.ELEVATIOIAS FOR WETLA/D STAFF GALES ARE MASON D BM SNOAN ON R04T OF 0 OROLI SURFAEF AT BASE Or STAFF GALL MAY PLANS FOP WFMAN PRANW O ROAD DATED FEBRUARY 17,19V Monitoring Locations 0 M Notes: N McEwan Prairie Facility 0 1.The locations of all features shown are approximate. y u0i 2.This drawing is for information purposes.It is intended to assist in showing features discussed in an attached Mason County,Washington Ir document.GeoEngineers,Inc.can not guarantee the accuracy and content of electronic files.The master file is stored by GeoEngineers,Inc.and will serve as the official record of this communication. --T i Fi Reference:Drawing is from Parametrix.2005 C]EOENGINEER g 55� ure2 L) 0 SP https//projects.geoengineers.com/135502301/Finals/Forms/Allltems.aspx Figures 3 through 6.potx JWP:jwp:lc 03/26/14 290 ---—*---- i i Piezometer P-2 ' A I Decommissioned I ' 2 E 5 ._.....................—L._..._...__..._. _...._..._.. ....._........ _...._ —__..._..._i_..._..._._._ ik r i m 275 LU J �B e5 e� I `"o- e �—b ! ` S—c :5 265 Water Level is Below Total Dept of Piezome e P-3 m at 27.9 feet=265.97 feet MSL 260 : i a PiemmeterP-1 1 1A- — f — -i P iezometer P-2 i 255 _;...___ _--J--—.._..._. .. i ...._..._.._..._._i _._.____.• -----..._.__. o—_._.___._ P iemmeter P-3 PiemmeterP-4 PiemmeterP-5 S v 4 v PtemmeterP-6 250 LD (D r- CO o') o r4 r v o c? o 0 0 C C C C C C C C C C m m m m m m m m m m Date Groundwater Level Elevations in Piezometers P-1 through P-6 McEwan Prairie Facility Mason County, Washington GEOENGINEERS Figure 3 SP https//projects.geoengineers.com/135502301/Finals/Forms/Allitems.aspx Figures 3 through 6.potx JWP:jwp:lc 03/26/14 290 --.----------.............._..._....._.._.__._...._.._..........._._..___.._� __i_._�.___.__...r.._.___.._._..-._,_.._..........._.........._.... _._.-.......................__......_.....__._.._._ 1 j I 1 1 1 1 I 1 I 285 -.._.._.._................_........ --.._.._._.._.._._.... __.._._.__..___._! _.�__._ .____.___..-_ ........ _.___ _.._._...... �_.. 7 1 ; i i ` _.-............_............. ... �--�—♦ Monitoring Well MW-1 k — — Monitoring Well MW-2 Monitoring Well MW-3 275 ------- ........... �� Monitoring Well MW-4 _._.._....._._......_.. Lv j ........_.... _.. ' � _4.._._............. w t t + 1 265 -_ 4r, j i [ 1 I 260 ........_.......... ..................................... ..........._.........__.._............... - -._... _ - ................-......... .............._....... ...................................................._......_- �5 1 � L55 ... _......-._ _ -- _i ............_•i—^--___. —}—......_.._......._.. ..._..c.._..._....................... ........ ...... __i._. _.. ._..1..._..—•—_••_-_ —....j_.._._._..._.__... _...f.__.._......_..—__....._ .._..................._..... 1 I 1 � 1 t 250 47 L9 f` 00 m O N [*] V O O O O O r C C C C C C C C C C R R R R R R R R R R Date Groundwater Level Elevations in Monitoring Wells MWA through MWA McEwan Prairie Facility Mason County, Washington GEoENGINEERS� Figure 4 SP https//projects.geoengineers.com/135502301/Finals/Forms/Allltems.aspx Figures3 through 6.potx JWP:jwp:lc 03/26/14 100 _..... ...........i--•------.' «.............._.....«..........:...._.....«.........�----------�...........---------- ...........i.........l........... 90 r.._.......r...._..... . 80 0 Annual Precipitation - Monthly Precipitation -------. ..'•-. _ -. ..i-- 64. 3 ' 6259 62, 5 L 60 -----. -----------t-------•-.y........ _ ........i........ ..i-...._.. V 55' 4 ` i 5• 2:07 � •.3 vera e-AfFu`al rea nation of32-25-inc-es - -.�� - - - . - - T9s - - -� 0 50 _..._._1...........,. - --P_...._.-- ...... ......._... ._....- ...... .... _.... _ ..�r. .. .. Q 4 - _. 2 € € € ; 30 -----------r----------........... ...._...-=--•--......<....-.....:........... ----_..--.•..........i-----------........... ...._.....i........... ..................... ------ 20 ....._ ...... _•--- ------_ _........ ..---- ..--•---.-h........—.1...._......F...______....................._.i...........2-........_.1.._...... _.L.__.._._.. - [ 10 -- ---- --- ----- ------ .....----. ---- ---- ---- .... -------- --------- .------ 0 c0 M O Ln CD n 00 (n O) 07 O O O p C? O Q Q O Q C C C C C C C C C C C C C C C C C f6 l6 tV iE tV cV f6 (6 f6 f6 l0 f6 f0 (O l4 fO � Date Annual and Monthly Precipitation at Wauna 3 SW Weather Station McEwan Prairie Facility Mason County, Washington GEoENGINEERS Figure 5 SP https//projects.geoengineers.com/13550230 1/Finals/Forms/Allitems.aspx Figures 3 through 6.potX JWP.jwp:lc 03/26/14 290 ................................... 285 280 o ---------- 275 ........ CD > 270 ------------------------------- -------------------- —----------------- ------ --------------------------- a) FU -2265 260 ------------- Wetland A [a E3 — -9 Wetland B Rex Lake 255 Wetland C .................. ................................ Wetland D 250 LO Imo. CC) O CV C? C? C? C? C? C C r- a a C C C m Date Surface Water Level Elevations in Wetlands A through D and Rex Lake McEwan Prairie Facility Mason County, Washington GEoENGINEER� Figure 6