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HomeMy WebLinkAboutWQ0023693_Monitoring (Information)_20190418 Soil,Water,&Environment Group,PLLC 3216 Byers Drive,Suite B Raleigh,NC 27607 � Ph#(919) 831-1234•Fax#(919)899-9100•http://www.swegrp.com Soil,Water,&Environment Group March 1st, 2019 Mr. Donald Dixon, Wastewater Treatment Specialist Brunswick County West Brunswick Regional Water Reclamation Facility P.O. Box 249 Bolivia, NC 28422 Re: Wetland Monitoring Report(Year 8 (2018)) (Mercer Mill & IP Tracts) Dear Mr. Dixon, Enclosed is the Annual Monitoring Report (Year 8)for the IP and Mercer Mill Tract reclaimed water dispersal systems wetland monitoring plan as accepted by NCDWQ(Permit No. 0023693 dated March 3, 2010). Groundwater pumping and spray irrigation commenced in June, 2011, as well as other facility operations. As directed by NCDENR,this monitoring report is completed at the end of the growing season and submitted at the end of the calendar year for review. Electronic copies of this report are being submitted for review and file. A new permit was issued for the facility in December 2017 with an amendment to increase infiltration limitations at MM#1 and MM#2 to 4.0 gpd/ftz and 2.5 gpd/ft2 respectively. Monitoring of the wetlands at the Mercer Mill Tract will continue under this modified hydrology regime and in accordance with the Wetland Monitoring protocol established to date and wetland standards rule (15A NCAC 2B .0231). Discharge will be monitored to ensure proposed flow rates and assess for signs of erosion or instability of the energy dissipaters and signs of sedimentation. We do not anticipate any adverse affects from the proposed hydrology modifications. At the writing of this report we do not see evidence of increased localized effects from the increase in discharge intensity and frequency. Above normal rainfall occurred in Brunswick County in 2018 (State Climate Office of NC) and below normal and normal rainfall on the IP and Mercer Mill receiver sites respectively. It is suspected debris in both rain gauges altered the accuracy of the data collected from the onsite rain gauges. Additional measures will be taken to ensure more accurate rainfall data at each location. Water has inundated all headwater and blackwater swamp wetlands on several occasions including major hurricane events,filling isolated pocket wetlands on both Mercer Mill and IP tracts. The data for rain gauges and wetland plots at both receiver areas was obtained in most instances during the monitoring period with the exception of the headwater forest gauge on the Mercer Mill tract that malfunctioned and was replaced. Rainfall data is now visible on well monitoring graph plots to help facilitate an understanding of effects of rainfall on wetland hydrology in conjunction with irrigation and infiltration operation. We look forward to working with you in satisfying your permit requirements for Mercer Mill and IP Tract reclaimed water receiver systems through this monitoring process. Best regards, T Scott J.Frederick,EI,NCLSS Environmental Scientist QV& Soil,%ter,&Famrommm Group cc: Mrs. Morella Sanchez-King, PhD, PE, Water Quality, Wilmington Regional Office Mr. Chad Coburn, NCDWR Water Quality, Wilmington Regional Office Mr. Steve West, PE, Water Quality, Wilmington Regional Office Soil,Water,&Environment Group,PLLC WW 3216 Byers Drive,Suite B Raleigh,NC 27607 Ph#(919) 831-1234•Fax#(919) 899-9100•http://www.swegrp.com Soil,Water,&Environment Group Wetland Monitoring Plan Report YEAR 8 (2018) IP and Mercer Mill Reclaimed Water Receiver Sites By: Brunswick County Utilities Department c/o Soil, Water, & Environment Group, PLLC For: NCDEQ Aquifer Protection Section NCDEQ Wetlands Unit January 2019 Site Location The IP and Mercer Mill Tract reclaimed water receiver sites are located on two distinct tracts in Brunswick County, NC. The International Paper Tract (IP Tract) comprises over 778 acres of managed loblolly pine plantation and mixed pine and hardwood bottomlands south of Green Ridge Trail, a spur road off Benton Road (SR 1502), and north of Old Lennon Road (SR 1504) in Brunswick County, NC (Figure 1). The Mercer Mill Tract comprises over 105.4 acres of mature forest east of Sunset Harbor Road (SR 1112) and south of Highway 211 in Brunswick County, NC (Figure 2). Brunswick County is located in the Coastal Plain physiographic province. Brunswick County is located on the lower coastal plain with elevation ranging from 75 feet to sea level. Methodology Baseline data was collected following establishment of permanent vegetation plots, shallow groundwater monitoring wells, and permanent sediment monitoring stations. Following approval from NCDEQ(formerly NCDWQ)for the wetland monitoring plan, the following components were addressed at the IP and Mercer Mill reclaimed water receiver sites as well as appropriate reference condition locations for each representative wetland resource: Wetland Hydrology Potential impacts to adjacent surface water hydrology were evaluated per the Plan in accordance with NC Environmental Management Commission (EMC) wetlands standards (15A NCAC 2B .0231),through the installation of automatic shallow groundwater recording wells and piezometers. Wells and piezometers were located within the hydrologic drainage influence of the selected infiltration basin and surrounding basin ditches adjacent to each wetland type (isolated, headwater forest, and swamp forest) as well as in selected reference wetlands respectively. Six 1 IP Tract Reuse Land Application Site Location Map 78,15'®0" W 78'14'00" W 78,13'ac" W WGS84 78412'00" VV Approximate Study Area bf COD .ti •�,�� � I ! ` - •.� r— _ - _� _ 1. _ � � br�.._ a � 1 { • n` k 5 78°15'00" W 78Q14'CO' W 78°13'©C" W WGS84 78412'00' W 1 MILE 4ylll�� ➢ leW FEET d MMFS 'May,:Teat-3aich TOPO'.:k i�-2003�Talional'GmSraphic MLinnalpo�aghic.evm•Lupo) Figure 1: IP Tract Site Location Map, Brunswick Co., NC 2 Mercer Mill Tract Reuse Land Application Site Location Map 70,12.000, W 7a,11.000' W WGS84 78'10.000' W ;it , 6ir V � � - � � ndpit >� - ��1�•I �� _~_.�. �r uShrraR C } 49 . � �, �;• �,r-�� � �_-�.J ifs Yell• _ _� S �� `y 1`P `f�• l _ f fog �; Approximate Study Area 1-7 In � ,1 •� � �f - �ti ,�j _ = •,i i f�f 'L�}.IS Lh r r :• �y — 4 ¢ram 78�12.000' W 73°11.000' W WGS84 78°10.000' W MII' Tll 0 S 1 MILE 9� a ioha FEET 0 �0 Ion METEps Map created with TOPO I A 52001 National Gacgaplvc(www mrAny o) Figure 2: Mercer Mill Tract Site Location Map, Brunswick Co., NC 3 (6) shallow, automatic groundwater monitoring wells were installed at the IP Tract as well as an additional six (6)wells at the Mercer Mill Tract. These wells record shallow groundwater hydrology every hour of each day and downloaded for annual reporting for each wetland type and associated reference wetlands. The first year of shallow groundwater monitoring resulted in several wells malfunctioning and loses of data due to electronics and/or lightening. Since then, well monitoring has been accomplished monthly by Brunswick County staff to ensure wells are functioning properly. More recently, rainfall events have inundated many areas more frequently and intensively requiring taller(80in) wells installed in eight (8) locations. Data will continue to be collected and duplicated for most plot locations to avoid data loss where possible. Rain gauges are also maintained in a similar manner as the wells to ensure a complete data set. Shallow groundwater at each facility receiver site was initially modeled using MODFLOW modeling software to make predictions on the hydrologic effects of the basin and ditch system on adjacent surface waters using 2-layer monitoring wells. Data used in this analysis was derived from monitoring wells selected and located appropriately and based on supporting site information (Hydrologic Monitoring and MODFLOW Simulation—Loading Test Report, Edwin Andrews &Associates, Sept. 21, 2011). A compact automatic rain gauge was placed at each site to collect on site data that can be used for hydrology analysis and monitoring reports. The location of each hydrology monitoring site as well as each automatic rain gauge is illustrated in the attached site maps (Figures 3, 4, & 5). According to the Wetland Monitoring Plan, should wetland hydrology demonstrated by shallow groundwater data show trends (i.e. >20%) in deviating from reference hydrology conditions during normal rainfall years, show increases or decreases in shallow groundwater levels, and/or show wetland standards are compromised for supporting wetland hydrology(15A NCAC 2B .0231), corrective action measures will be put in place at the direction of DEQ. During 2016 and 2017 the facility permit was renewed and amended to increase infiltration limitations at MM#1 and MM#2 to 4.0 gpd/ftz and 2.5 gpd/ftz respectively. A new permit was issued for the facility in December 2017. Monitoring of the wetlands at the Mercer Mill Tract will continue under this modified hydrology regime and in accordance with the Wetland Monitoring protocol established to date and wetland standards rule (15A NCAC 2B .0231). Discharge will be monitored to ensure amended and approved flow rates and assess for signs of erosion or instability of the energy dissipaters and signs of sedimentation at the discharge outfalls. We do not anticipate any adverse effects from the proposed hydrology modifications. Isolated Wetlands From the data collected (Appendix: Year 8 Shallow Groundwater Data), the isolated wetland at the MM site appears to experience rainfall events similarly to the reference wetland located off site for wetting and drying cycles. Due to equipment malfunction an analysis of the data for the IP isolated wetland is not possible. However, during several occasions during the year,the isolated wetland located in the vicinity of the facility operations contained ponded water similar to the reference wetland monitored. The IP isolated reference wetland exhibited very wet conditions during 2018 as a result of above normal rainfall and several exceptional rainfall events during the year and accumulating saturated conditions on site. Receiver site Isolated 4 wetlands at both reference and monitoring locations have been inundated in 2018 following rainfall events, including exceptional rainfall events from hurricanes. elackwater Swamps The blackwater swamp monitoring location for the IP site appears consistent with the reference for inundation, but lacking drying cycles again for 2018. This can affect facultative vegetation that is intolerant of saturated conditions. The blackwater swamp monitoring location for MM shows a similar drainage pattern as the IP site with no drainage cycles relative to the reference wetland and is wetter overall than the reference wetland. This can also affect facultative vegetation and is evident in the vegetation monitoring plots for the blackwater swamp wetland type at both the IP and MM sites. Headwater Forest The headwater forest monitoring site at IP shows a much more sensitive response to rainfall events than the reference site. This may be due to the forest clearing in and around the subwatershed for this drainage. And the IP monitoring site is staying wetter, longer than the reference site, but achieves drying cycles similar to the reference site, although much more rapidly. The headwater forest monitoring site for MM appears much drier than the reference condition most likely due to landscape position and receiving slopes in the subwatershed. A malfunction occurred with the headwater wetland monitoring well during 2018 and a new well data logger was installed. Subsurface flows are important in headwater forest systems and the monitoring site has gradual slopes extending away from the monitoring well versus the steeper slopes with more receiving area upslope at the reference site. Overall, it is inconclusive at this point whether these shallow groundwater elevation differences and longer inundation times between the monitoring sites and reference sites affect wetland functions, particularly the blackwater swamp locations. As discussed,the blackwater swamp monitoring plots are staying wetter longer as seen on the monitoring well graphs, without drying cycles exhibited by reference wetland conditions. Some facultative plants are being affected as revealed by site observations and vegetation monitoring data and onsite observations. New, more resilient vegetation continues to colonize the wetland in the understory. Continued monitoring will be necessary to document conditions following newly permitted changes to discharge flows,thereby increasing infiltration limitations at MM#1 and MM#2 to 4.0 gpd/ft2 and 2.5 gpd/ftz respectively. Monitoring of the wetlands at the Mercer Mill Tract will continue under this modified hydrology regime. Rain Gauges Rain gauges located at each dispersal facility are also included in the report on monitoring well graphs for this year to show rain events relative to shallow groundwater data. Rainfall for 2018 is above normal (Bolivia Sta.NC-BR-71), and below normal to normal for the receiver sites. It is suspected debris in both rain gauges altered the accuracy of the data collected from the onsite rain gauges. Additional measures will be taken to ensure more accurate rainfall data at each location. Water Quality All water chemistry was monitored at the facility as part of the existing DWQ Aquifer Protection permit conditions. The existing water quality monitoring at the plant site was determined sufficient information for inclusion in annual reports during the 5/25/10 Raleigh meeting with 5 DWQ Aquifer Protection,for maintaining and monitoring water quality entering adjacent wetlands at the treatment sites. Sampling currently occurs by Brunswick Co. staff in March,July, and November of each year and coincides with groundwater pumping periods. Constituents monitored include;TSS,TN, NH3-N, TKN, NO3-N, BODS,TDS,TP, pH,TOC, fecal, Cl,turbidity, residual chlorine, and flow. A copy of these water quality monitoring requirements are included in the Permit Appendix (See: Water Quality Monitoring Requirements—Permit Attachment A). Sediment discharged or shown to accumulate due to discharge was monitored periodically and recorded every 6 months to coincide with other water constituent monitoring. This monitoring occurs at each discharge location at the IP Tract (3 locations) and Mercer Mill Tract (2 locations). This monitoring occurs twice annually (March & November). Transects were established and monitored using devices approved by NCDENR and according to current monitoring protocol and literature (Heimann, 2000 and Kleiss, 1996). Sediment accumulation was monitored using permanent plots situated in the vicinity of discharges and wetland resources. Kaolinite clay or similar material was used as a base layer tracer at each permanent plot. This material is very light in color and can be seen as a depositional layer should sediment accumulate. Organics and leaf litter will also deposit on these sediment monitoring stations as evidenced during sampling times. In addition, should sediment accumulate at discharge locations due to circumstances beyond the control of the facility staff, an explanation of the discharge along with photographic evidence is sufficient for reporting protocol. Sediment accumulating greater than 2 inches in depth will have to be removed by hand or an explanation provided to NCDENR's written satisfaction why that sediment should not be removed. Catchment and retention pools at all five discharge locations at the five groundwater pumping stations for both sites have been installed and working to reduce sediment delivery to adjacent wetlands. Staff periodically monitors these catchment basins to ensure correct function and dissipation of discharge waters. During the Year 8 monitoring year, no evidence of sediment accumulation directly from the discharge water was observed. Natural vegetation recruitment continues to colonize areas disturbed previously in 2016 at MM_SED-1. Iron bacteria continue to grow and thrive in the outfall reaches at the groundwater discharge stations. These bacteria oxidize ferrous iron (Fe2) to ferric iron (Fe3). After exposure to the air, water, and microbes oxidizing organic matter (in the wetlands),ferric iron converts to iron oxide (Fe(OH)3) and the bacteria thrive on this release of energy through oxidation. These bacteria pose no known threat to human or aquatic life and occur naturally at groundwater seeps, stagnant water areas, and in iron rich water. Permanent sediment monitoring stations are shown in Figures 3, 4, and 5 (Appendix). A photo library of these sites is also available in the Appendix(Sediment Monitoring Plots). Vegetation Monitoring During this eight (2018) monitoring year, vegetation data was not collected at selected areas within each wetland type and appropriate reference wetland areas for comparison to wetlands within the compliance line at each project site once the facility is in operation. Vegetation data 6 collection conforms to the Carolina Vegetation Survey (CVS) and completed every three years after baseline monitoring. The CVS protocol requires intensive surveying of woody and herbaceous plants in random or representative plots. Data is systematically collected and filed for analysis to determine potential plant community changes due to a modified hydrologic regime. CVS plots were established within each wetland type adjacent to groundwater lowering facility components as well as representative wetland reference areas. Plots are located with rebar and GPS coordinates. Plot locations and orientation, corners, and intensive modules are included with the baseline data set (Appendix—Figures 3, 4, and 5). Within each plot, CVS Level III is accomplished using typical plots (2x5 array of modules)where feasible given site conditions with at least 4 intensive modules per plot. A total of 6 vegetation plots per site including reference areas are established for long-term monitoring for a total of 12 vegetation monitoring plots. Data will continue to be collected every three (3)years according to the approved Monitoring Plan. Overall to date,the vegetation components are quite similar to the baseline data collected with the exception of the blackwater swamp wetland types. These wetland types have been inundated longer and more frequently than the reference sites,thus affecting some sensitive, facultative wetland species. These effects appear isolated within some quadrants of the monitoring plots at the Mercer Mill site and more evenly distributed in quadrants at the IP site within plots. Species affected include loblolly pine (Pinus taeda), red maple (Acer rubrum), blue beech (Carpinus caroliniana), inkberry(Ilex glabra), and green ash (Fraxinus pennsylvanica). Also, new, more tolerant wetland vegetation is now regenerating in their place, including some facultative wet species (i.e.Acorus americanus,Soururus cernuus, Hydrocotyle sp,Juncus sp, and Polygonum hydropiperoides). Should this trend continue, additional more tolerant species will regenerate as others decline in areas closest to the discharge locations. Thus, overall wetland functions are potentially maintained. The next year for vegetation monitoring is Year 10 (2020). Conclusions All data and site observations detailed above will be submitted for review to NCDENR staff. Copies of this report are being submitted electronically for distribution, review, and file approximately January/February of the year following the current monitoring year. At the end of each monitoring year, and every three years for vegetation, a review of hydrology and other site conditions will be conducted and evaluated to determine whether additional monitoring is needed. From the data collected in accordance with the Wetland Monitoring Plan for Year 8 (2018), no conclusions can be made about the long-term effects of the two wastewater dispersal facilities on adjacent wetlands or impacts to wetland functions broadly. An attempt to understand the hydrologic regime of the infiltration basins relative to wetland hydrology was completed through a MODFLOW analysis during simulated operation conditions (Hydrologic Monitoring and MODFLOW Simulation— Loading Test Report, Edwin Andrews &Associates, Sept. 21, 2011). The model shows a trend that impacts to adjacent wetlands are minimal and can readily be mitigated through the above ground spray irrigation, groundwater discharge controls, and system operations. Monitoring of shallow groundwater and vegetation will continue in subsequent years to support these calculations as well as amended changes to the permitted flows at the MM facility discharge locations accepted and permitted December 2017. 7 Even though vegetation data shows a decline in some species in areas abutting the discharge outfalls into blackwater swamp wetlands, new species are regenerating and overall wetland function is potentially maintained. Monitoring of shallow groundwater and vegetation will continue in subsequent years to support the recent permit modification to support increased discharges to adjacent wetlands, particularly the blackwater swamp wetlands. Should data trends show minimal to no impact on overall wetland functions, monitoring requirements may be decreased or terminated upon NCDENR review and approval. 8 APPENDIX 9 Shallow Groundwater Data (2010—2018) IP Reference Monitoring Well(Blackwater Swamp Wetland) 6.00 14 5.00 12 4.00 10 $ 3.00 8 0 > 2.00 c _m w 6 m 9 1.00 d m 4 0.00 2 -1.00 t IPAS-REF Soil Surtace -2,00 0 �Rainfell -3.00 -2 7/6109 11/18110 411112 8/14/13 12127/14 5110116 9122117 214119 6118120 Date IP Monitoring Well(Blackwater Swamp Wetland) 6.00 14 5.00 12 4.00 10 3.00 - 8 0 � c W m 2.00 6 m .a c F 'm 1.00 4 0.00 2 iP-es ISoil Surface .1.00 0 �RainFall -2.00 -2 7I6109 11/18/10 411112 8114/13 12/27/14 5/10116 9122/17 214119 6118/20 Date IP Reference Monitoring Well (Headwater Forest Wetland) 1.00 14 0.50 12 10 0.00 A AL i c 8 0 1° -0.50 m e W 6 c `m -1.00 r m 4 -1.50 T — I� 2 IP-HF-REF T _ -2.00 i Sail Surface 0 Rainfall -2.50 -2 716109 11/18/10 411112 8114113 12/27/14 5/10116 9/22/17 214119 6118120 Date IP Monitoring Well(Headwater Forest Wetland) 1.0 14 0.5 - 12 0.0 - 10 -0.5 � 8 0 LU m 6 e F -1.5 m 4 -2.0 2 -2.5 t j R '� I 3: --•—�P-wIF -3.0 � Soil sorters 0 Rainfall -3.5 -2 7/6109 11/18/10 411112 8/14113 12127/14 5110/16 9122/17 2/4/19 6/18/20 Date IP Reference Monitoring Well(Isolated Wetland) 4.00 14 3.00 12 2.00 10 x c 1.00 8 a m c `U lit 1 1, n 0.00 6 Z � 'R `m -1.00 4 -2.00 2 SIP-IW-REF -Soil Surface -3.00 kL 0 Rainfall -4.00 -2 11118/10 411112 8114/13 12/27/14 5110116 9122117 214119 6118120 Date IP Monitoring Well(Isolated Wetland) 3.00 14 2.00 12 1.00 10 0.00 x 1.00 8 0 w °J 6JL" w � c W 12 3.00 .. � d A -4.00 4 -5.00 2 i -6.00 11. I.J111 i IN I lit 11 1 k Soil Surface Am immu kAlmiwk WILUM 11djal ij IL L -7,00 —Rainfall -8,00 -2 716109 11/18/10 411112 8/14/13 12/27/14 5/10/16 9/22117 214119 6118120 Date IP RAIN GAUGE 140 12,0 10,0 8.0 m 6,0 4.0 - --- - - -- t Rainfall 20 Li I Tilt I 0.0 AMIR Date in -2.0 ` 11/18/10 411l12 8114113 12/27114 5110/16 9122117 214119 6118120 Mercer Mill Reference Monitoring Well (Blackwater Swarnp Wetland) 5.0 — 7.00 4.0 6.00 5.00 3.0 c 4.00 m m 2.0 3.00 c m U 1.0 t i 2.00 oa y Pf 1.00 �MM-BS-REF I Soil Surface IL -0.� - `7 t 0.00 ""Rainfall -2.0 -1.00 716109 11/18/10 411112 8/14113 12/27/14 5/10116 9/22117 214119 6/18120 Date Mercer Mill Monitoring Well (Blackwater Swamp Wetland) 7.0 7.00 6.0 6.00 5.0 4.0 5.00 3.0 c 4.00 m W 2.0 m 3.00 1.0 BIN- 1W m m 0.0 2.00 1.00 M M-BS -2.0 Soil Surface 0.00 Rainfall -3.0 -4.0 -1.00 716109 11/18/10 411112 8114/13 12/27/14 5110116 9/22/17 214119 6118/20 Date Mercer Mill Reference Monitoring Well (Headwater Forest Wetland) 1.0 7.00 0.5 6.00 D-0 5.00 o -0.5 4.00 a a w 1.0 -r m — 3.00 � -1 5 3 , 2.00 -2.0 I I I 1.00 -2-5 t MM-HF-REF Soil Surface -3.0 —Rainfall -3.5 -1.00 7/6109 11118/10 4/1112 8114/13 12/27/14 5110116 9122117 214119 6118120 Date Mercer Mill Monitoring Well(Headwater Forest Wetland) 0.5 7.00 0.0 6.00 -0.5 5.00 -1.0 c a 4.00 m w m -2.0 3.00 w ' 2.00 r -3.0 1.00 Soil Surface ---^Rainfall 0.00 -4.0 -4.5 -1.00 716109 11/18/10 411112 8/14113 12/27/14 5I10116 9122/17 214119 6/18120 Date Mercer Mill Reference Monitoring Well(Isolated Wetland) 2.0 7.00 6.00 1.0 5.00 c 0.0 4.00 0 m � c IJJ i -1.0 3.00 w 12 c F 1 m 3 2.00 -2.0 1.00 I _ tMM-IW-REF -3.00.00 Surface y , I F-7—Rainfall -4.0 -1.00 716109 11/18/10 411112 8114113 12/27/14 5110/16 9/22117 214119 6118l20 Date Mercer Mill Monitoring Well (isolated Wetland) 4.0 - 7.00 3.0 6.00 2.0 5.00 c ° 1.0 4.00 a m W Gf • 0.0 3.00 C_ OI p � I � 3 -1.0 2.00 i I 1 t 6111 i -2.0 ■ ih - �i, 1.00 I Soil Surface -3.0 0.00 Rainfall -4.0 -1.00 716109 11/18/10 411112 8114113 12/27/14 5110/16 9122/17 214119 6/18120 Date MERCER MILL RAIN GAUGE 7,0 60 5,0 4.0 3,0 �a 2,0 1.0 t Raf nfall 0.0 -1.0 716109 11/18/10 411112 8114113 12/27/14 5110116 9122/17 214119 6118120 Date Hydrology,Vegetation, and Sediment Monitoring Plots (Figures) / Point Northing Easting Description 1 101318.73 2233675.41 REUSE VALVE 2 101318.73 2233675.41 REUSE VALVE 3 101182.05 2233831.58 REUSE VALVE 4 101083.54 2233237.55 REUSE VALVE 5 100969.72 2233651.15 REUSE VALVE 6 100720.28 2234235.64 REUSE VALVE j \ 7 98986.87 2232207.98 REUSE VALVE / 8 98985.77 2232222.70 REUSE VALVE i 9 98595.56 2233805.21 REUSE VALVE 10 98767.18 2234245.16 REUSE VALVE / ZfSNE A2 11 98739.08 2234254.54 REUSE VALVE 2 1 n g s ZONE A3 I ~ 5 . . ZONE A1- /y - - - - - - - - - - - - - - - - - - - - - - - - 6 . . . . . . . . . . . _ apt _ _ _ _ _ \ . . . . . . . . . /--� . . . . . . A.. 8 I o 9 N \ . ` . . / - - - - - - - - - - - - - - ZONE C ZONES A O ZONE B �• parf�. ZONE B ,a ZONE B \ I OVERALL SITE LAYOUT zoo' 0 200' 400' IP SITE PLAN SCALE: 1-200'(Horn.) 20"FORCE AN O BASIN 2 VA VAULT f1LLS / i - (BT THERS) 1)NSTALL CL yO� / 12"PVG CMCO 5 PE.INTERVALS r, ON ALL PAIN PI - - (ogA1L�DN`sHr L3D,) / 2)INSTALL CLAY ANTI-SWEEP COLlgBB�AT 200FT. / INTERVALS ON ALL PERFORATED,EkN PIPE. 4"DE I— MAIN (DETAILS ON SHT C301) a 01 TRIOU ' MIN 12"HOPE i RECLAIMED WAR OTHTEERS) IYEE SIN 1 VALVE V 6 UCE / BUTIO \ ---------12 C900 / \ / 6 D1SiRIB ICOUC I NE \\ \ 67EE UIION MNN o _ C I 2'RON E NN NE WITH PIPE LE LONNELTIO EOu (LOORDINAr / \/ CE INS CONTRACTOR) MILL C R E - --SEE SIR,GOA---- AreR AT ow w, ._ � � I PIPING SITE PLAN DETAIL C. I o -UcER � I ....- r 8 DISTRIBUTION MAN \( x o l i w• s �e� o I PUMP STA. Al EL. ry0 5 p OF O 20 51 -2.' I � II P I TOE 0 o- I 11 - BASIN 2 1 OOOP , eeOJ�O ,S EVERI Y CLEA --. O 'a DRA 150'(TYP.) I L BHT C_ 301) I DETAIL 1U'HDPE PERFORATED II ' 'PAIN P(PE II �pJ E ryoa _ PUMP STA �_. 0 1 ?p ppqq ET' f,\' \ • �• p/pfPx5rAT10 e O - _- -f b'CHAIN K AN 12'PVC aT � MAIN � t DRAIN LINE IN V.EL 2600 ' \ N BASIN 10 HDPE PERFORATED GRAIN o � 100' 0 100 200' (BY OT ERs) EA"' 20'FORGE MAIN — � BYDT"ERS) MERCER MILL SITE PLAN I a� �P O - All\ S,.`y. �mi-f• �k L � W �L