Environment Act Proposal

Rapid City Lagoon Expansion

Rural Municipality of Oakview

Environment & Geoscience

4 October 2019 Internal Ref: 648290

Environment Act Proposal Rapid City Lagoon Expansion

Notice to Reader

This report has been prepared and the work referred to in this report has been undertaken by SNC-Lavalin Inc. (SNC-Lavalin), for the exclusive use of the Rural Municipality of Oakview, who has been party to the development of the scope of work and understands its limitations. The methodology, findings, conclusions and recommendations in this report are based solely upon the scope of work and subject to the time and budgetary considerations described in the proposal and/or contract pursuant to which this report was issued. Any use, reliance on, or decision made by a third party based on this report is the sole responsibility of such third party. SNC-Lavalin accepts no liability or responsibility for any damages that may be suffered or incurred by any third party as a result of the use of, reliance on, or any decision made based on this report.

The findings, conclusions and recommendations in this report (i) have been developed in a manner consistent with the level of skill normally exercised by professionals currently practicing under similar conditions in the area, and (ii) reflect SNC-Lavalin’s best judgment based on information available at the time of preparation of this report. No other warranties, either expressed or implied, are made with respect to the professional services provided to the Rural Municipality of Oakview or the findings, conclusions and recommendations contained in this report. The findings and conclusions contained in this report are valid only as of the date of this report and may be based, in part, upon information provided by others. If any of the information is inaccurate, new information is discovered or project parameters change, modifications to this report may be necessary.

This report must be read as a whole, as sections taken out of context may be misleading. If discrepancies occur between the preliminary (draft) and final version of this report, it is the final version that takes precedence. Nothing in this report is intended to constitute or provide a legal opinion.

SNC-Lavalin disclaims any liability to third parties in respect of the use of (publication, reference, quoting, or distribution), any decision made based on, or reliance on this report or any of its contents.

Environment Act Proposal Rapid City Lagoon Expansion

Executive Summary

SNC-Lavalin Inc. (SNC-Lavalin) was retained by the Manitoba Water Services Board (MWSB) on behalf of the Rural Municipality (RM) of Oakview to prepare this Environment Act Proposal (EAP) for the proposed Rapid City Lagoon Expansion. The lagoon currently services a population of 440 people in Rapid City and is being expanded to bring the lagoon into compliance with current legislation. The proposed expansion includes adding winter storage capacity through the construction of a new secondary treatment cell, as well as a new concrete truck dump spillway into the primary cell. It will utilize the existing pump station / forcemain infrastructure and will provide an additional 25 years of wastewater treatment capacity.

SNC-Lavalin completed an assessment of the existing lagoon to determine its physical condition and current loading capacity. The current loading capacity was compared to the current and 25-year future service population. The wastewater treatment lagoon at Rapid City was found to be structurally sound with a suitably impermeable liner based on visual observations and geotechnical testing. The hydraulic conductivity of the clay liner sample was measured to be 7.19 x 10-8 cm/s. The hydraulic and organic loading assessment found the lagoon suitably sized to handle the organic loading from the 25-year design population but significantly undersized to handle the current and future winter storage requirements. Based on the 25-year design population of 500 people and the wastewater generation rate of 220L/cap/d the lagoon requires approximately 8,500 m3 of additional storage volume to satisfy the 230-day winter storage requirement.

SNC-Lavalin evaluated three options for upgrading the lagoon to bring it into compliance with current legislation: (1) add additional winter storage capacity by constructing a new secondary cell; (2) build a new lagoon in a new location with sufficient winter storage capacity; and, (3) implement tertiary treatment with a submerged attached growth reactor (SAGR) system to allow for continuous or nearly continuous discharge from the lagoon, significantly reducing, or eliminating the need for winter storage capacity. Option 1 was the recommended system, as it was the least expensive and simplest option to upgrade the Rapid City lagoon. It will maximize the use of the existing infrastructure and continue with facultative treatment which is simple to operate and maintain.

The proposed expansion includes adding winter storage capacity through the construction of a new, soil- lined secondary treatment cell, as well as a new concrete truck dump spillway into the primary cell. The expansion will utilize the existing pump station / forcemain infrastructure. The new lagoon cell will be roughly 0.75 ha in area at a standard 1.5 m operating depth. Treated water will be discharged intermittently along the existing discharge route down to the Little Saskatchewan River. The lagoon has been designed in accordance with the Manitoba Sustainable Design Objectives for Wastewater Treatment Lagoons (MSD 2017a). It has also been designed such that the effluent will meet the water quality limits outlined by the Manitoba Water Quality Standards, Objectives, and Guidelines. Construction is tentatively scheduled to commence in May 2020, pending receipt of regulatory approvals and funding, and is expected to take four to six months to complete. The design life of the facilities is 25 years.

A geotechnical investigation will be required to demonstrate whether it will be feasible to construct a recompacted soil liner with the in-situ soil in that location. A geotechnical investigation was conducted immediately west of the existing lagoon, however, the soils do not meet the MSD guideline for hydraulic conductivity, hence would require importing clay or installation of a synthetic liner. Since the investigation, the proposed site for the expansion was moved to the south of the existing lagoon, and the wide variability of the soils encountered west of the existing lagoon do not allow a good estimation of the soil type expected south of the existing lagoon. The RM of Oakview will conduct a geotechnical investigation within the RM of Oakview 648290 4 October 2019 © SNC-Lavalin Inc. 2019. All Rights Reserved. Confidential. ii

Environment Act Proposal Rapid City Lagoon Expansion

footprint of the proposed expansion to determine if it is feasible to construct a recompacted soil liner with the in-situ soil in that location. If not, the lagoon will require the importing of clay or construction of a synthetic liner. The RM of Oakview is committed to design the lagoon to meet the MSD (2017a) Design Objectives for Wastewater Treatment Lagoons.

Rapid City is located within the Hamiota Ecodistrict of the Aspen Parkland Ecoregion of the Prairies Ecoregion and on the banks of the Little Saskatchewan River. Data were compiled from provincial surficial geology maps, the provincial groundwater well database, and the project’s geotechnical study to understand the surficial geology of the area. Much of the area appears to consist of diamicton till with layers of sand and gravel in the first several metres. The Manitoba Conservation Data Centre (MBCDC) was contacted for a search of their database for rare species within the project footprint plus a two-kilometre buffer, and no occurrences were found. The Manitoba Historic Resources Branch (HRB) examined the proposed area of disturbance in conjunction with their records and did not have any concerns with the project at its proposed location.

The potential and/or expected project effects were evaluated, and include:

› Dust and noise emissions during construction activities;

› Odours and air emissions during operation from the release of methane, H2S and NOX;

› Permanent displacement of soils to construct the lagoon;

› Removal of a small tree stand to accommodate the new cell;

› Treated effluent discharge which will flow into the Little Saskatchewan River and may include coliforms, organic wastes, suspended solids and other contaminants; and

› Potential for effects to soils / groundwater if the wastewater leaks/seeps through the lagoon liner into the groundwater or in the event of an accidental spill.

The RM of Oakview is committed to avoiding or reducing adverse environmental effects associated with the proposed project wherever possible and has developed numerous mitigation and environmental design measures to minimize these effects. Overall, the expansion is expected to improve the water quality of the effluent and provide the community with a wastewater facility that can accommodate its long-term needs.

Environment Act Proposal Rapid City Lagoon Expansion

List of Abbreviations and Acronyms

Term Definition BOD biological oxygen demand CBOD5 5-day carbonaceous biological oxygen demand ECCC Environment and Climate Change Canada E.Coli Escherichia coli EAL Environment Act Licence EAP Environment Act Proposal HRB Historic Resources Branch I&I infill and infiltration MBCDC Manitoba Conservation Data Centre MSD Manitoba Sustainable Development MWS Manitoba Water Stewardship MWSB Manitoba Water Services Board RM Rural Municipality SAGR Submerged Attached Growth Reactor SNC-Lavalin SNC-Lavalin Inc. TSS total suspended solids

List of Units

Term Definition % percent °C degrees Celsius cm/s centimetres per second ha hectare kg/d kilograms per day kg/y kilograms per year L litre L/cap/d litres per capita per day L/s litres per second m metre masl metres above sea level mbgl metres below ground level mg/L milligrams per litre mm millimetre m3 cubic metre m3/d cubic metre per day m3/y cubic metre per year

Environment Act Proposal Rapid City Lagoon Expansion

Table of Contents

Introduction and Background 8

Statement of Need ...... 8 Proponent ...... 8 Regulatory Framework ...... 10 Community Engagement ...... 10 Description of Existing Development 11

Physical Lagoon Assessment ...... 11 Geotechnical Investigation ...... 12 Hydraulic Loading Assessment ...... 12 Current and Future Population and Loadings ...... 13 Summary of Existing Lagoon Assessment ...... 14 Description of Proposed Development 14

Project Location...... 14 Ownership of Land and Mineral Rights ...... 14 Existing Land Use ...... 15 Assessment of Alternatives ...... 15 Proposed Expansion ...... 16 Geotechnical Investigation ...... 16 Classification of the Wastewater Treatment System ...... 17 Phosphorus Reduction Strategy ...... 17 Lagoon Operation and Maintenance ...... 17 Operator Requirements ...... 18 Decommissioning ...... 18 Schedule ...... 18 Workforce ...... 19 Description of Environment 19

Climate ...... 19 Physiography, Terrain and Soils ...... 19 Surficial Geology and Groundwater ...... 19 Surface Water ...... 20 Biological Environment ...... 20 Vegetation ...... 20 Wildlife ...... 21 Fish and Fish Habitat ...... 21 Socio-Economic Environment ...... 22 Heritage Resources ...... 22 Description of Environmental Effects and Mitigation Measures 22

Environment Act Proposal Rapid City Lagoon Expansion

Atmospheric Environment ...... 22 Effects ...... 22 Mitigation ...... 22 Terrain and Soils ...... 23 Effects ...... 23 Mitigation ...... 23 Groundwater ...... 24 Effects ...... 24 Mitigation ...... 24 Surface Water ...... 24 Effects ...... 24 Mitigation ...... 24 Biological Environment ...... 25 Effects ...... 25 Mitigation ...... 25 Socio-economic Effects ...... 25 Effects and Mitigation ...... 25 Heritage Resources ...... 25 Effects ...... 25 Mitigation ...... 25 Unplanned Events and Upset Conditions ...... 26 Effects ...... 26 Mitigation ...... 26 Effects of the Environment on the Project ...... 26 Effects ...... 26 Mitigation ...... 26 Closure 27 References 28

Tables Table 1.1 Effluent limits ...... 10 Table 2.1 Existing lagoon cell dimensions and volume ...... 12 Table 2.2 Existing lagoon sludge volume and depth measurements ...... 12 Table 2.3 Purchased water volumes and estimated wastewater production in Rapid City ...... 12 Table 2.4 Pumping rates of Rapid City lift station pumps based on drawdown test ...... 13 Table 2.5 Annual flow to the existing lagoon based on drawdown test pump rates and pump hour records 13 Table 2.6 Current and future loading rates and treatment requirements ...... 14 Table 3.1 Summary of the proposed cell design parameters; all dimensions are approximate ...... 16 Table 3.2 Preliminary project schedule ...... 18 Table 4.2 Fish species found in the Little Saskatchewan River (McCulloch and Franzin 1996) ...... 21

Environment Act Proposal Rapid City Lagoon Expansion

Figures Figure 1.1 Location of the proposed lagoon expansion ...... 9

Appendices A Land Purchase Agreement B Preliminary Engineering Drawings C Geotechnical Investigation D Application for Wastewater Treatment Facility Classification E Correspondence - MBCDC (Colin Murray), 21 May 2019, Email - HRB (Suyoko Tsukamoto), 24 June 2019, Letter F List of Species in the Aspen Parkland Ecoregion - Table F.1 Subnational (S) conservation status ranks (MBCDC 2019) - Table F.2 List of plant and animal species in the Aspen Parkland Ecoregion (MBCDC 2019)

Environment Act Proposal Rapid City Lagoon Expansion

Introduction and Background

SNC-Lavalin Inc. (SNC-Lavalin) was retained by the Manitoba Water Services Board (MWSB) on behalf of the Rural Municipality (RM) of Oakview to prepare this Environment Act Proposal (EAP) for the proposed Rapid City Lagoon Expansion (Figure 1.1). The lagoon currently services a population of 440 people in Rapid City and is being expanded to bring the lagoon into compliance with current legislation. The proposed expansion includes adding winter storage capacity through the construction of a new secondary treatment cell, as well as a new concrete truck dump spillway into the primary cell. It will utilize the existing pump station / forcemain infrastructure and will provide an additional 25 years of wastewater treatment capacity. Statement of Need

The existing lagoon at Rapid City does not have a valid operating licence under the Environment Act and operates under a Provincial Sanitary Control Commission Licence No. P157, which is no longer considered to be a valid operating license under current legislation. An assessment of the lagoon determined upgrades are required to bring the lagoon into compliance with current legislation. Proponent

The project proponent is the RM of Oakview and the MWSB is providing support for the project.

Project Name: Rapid City Lagoon Expansion

RM of Oakview Contact: Diane Kuculym, C.A.O. Box 179, 10 Cochrane Street Oak River, MB R0K 1T0 Phone: 204-566-2146 E-mail: [email protected]

MWSB Contact: Dee Genaille 2010 Currie Blvd. Brandon, MB R7A 6Y9 Phone: 204-726-6080 E-mail: [email protected]

424,500 424,750 425,000 425,250 LEGEND

DISCHARGE ROUTE

OVERVIEW 11x17

300 METRE BUFFER SIZE ³ PROPOSED INFRASTRUCTURE

PART N.E. 1/4 SEC. 9-13-19 WPM MANITOBA

BLOCK 28 The Pas 5TH AVENUE

Swan River

Dauphin DETAIL BLOCK 37 Neepawa Virden Winnipeg Brandon EASEMENT PLAN NO. 31272 5,552,250 Souris 5,552,250

SCALE: 1:15,500,000 6TH AVENUE EXISTING LAGOON

PARCEL A EXISTING PLAN 5226 NLTO LAGOON

9TH STREET NOTES BLOCK 46 1. COORDINATE SYSTEM: NAD 1983 UTM ZONE 14N. 2. IMAGERY (AUGUST 25, 2015) OBTAINED FROM GOOGLE EARTH. LOT 1 PLAN 7510 NLTO

PART N.E. 1/4 SEC. 9-13-19 WPM

BLOCK 55 5,552,000 5,552,000 DISCLAIMER NE1/4-19-13-19-W1M NW1/4-20-13-19-W1M This drawing was prepared for the exclusive use of Rapid City(the"Client"). Unless otherwise agreed in writing by SNC-Lavalin Inc., SNC-Lavalin Inc.does not accept and disclaims any and all liability or responsibility arising

10TH STREET GOVERNMENTALLOWANCE ROAD from anyuse of or reliance on this drawing by any third party or any modification or misuse of this drawing by the Client. This drawing is confidential and all intellectual property rights embodied or referenced in this drawing SE1/4-19-13-19-W1M SW1/4-20-13-19-W1M remain the property of such parties,as determined by the applicable services contract or contracts between SNC- Lavalin Inc. and the Client.

REFERENCE DRAWINGS

DWG No. DESCRIPTION REVISIONS

PA 2019 05 03 ISSUED FOR REVIEW LM KVG REV DATE DESCRIPTION DES DRN CHK APP

0 50 100 200 METRES SCALE: 1:3,000

CLIENT PROJECT LOCATION RM OF OAKVIEW RAPID CITY, MANITOBA 5,551,750 5,551,750

TITLE LOCATION

424,500 424,750 425,000 425,250 DATE 2019 05 03 DWG No. 648290-0000-4EDD-0001 FIG No. 1.1 REV PA

Plan.mxdSite GIS\Drawing\648290-0000-4EDD-0001 City\648290_EAP\40_Execution\45_GIS_Dwgs\4.5.1 Projects\Rapid \\Sli2606\projects\LOB\EIAM-PR\Current Path: Environment Act Proposal Rapid City Lagoon Expansion

Regulatory Framework

A wastewater treatment lagoon is considered a Class 2 development under Manitoba’s Environment Act and will require a Class 2 Environment Act Licence (EAL). This EAP has been prepared in accordance with the following guidelines:

› Information Bulletin – Design Objectives for Wastewater Treatment Lagoons (MSD 2017a);

› Information Bulletin – Environment Act Proposals for Wastewater Treatment Facilities – Supplementary Guidelines (MSD 2017b); and

› Information Bulletin – Environment Act Proposal Guidelines (MSD 2018).

The effluent must meet water quality limits outlined by the Manitoba Water Quality Standards, Objectives, and Guidelines (Manitoba Water Stewardship [MWS] 2011) legislated under the Manitoba Water Quality Standards, Objectives and Guidelines Regulation under The Water Protection Act, as well as design criteria outlined by Manitoba Sustainable Development (MSD 2017b) (Table 1.1).

Table 1.1 Effluent limits Parameter Standard/Objective/Guideline Source 5-day carbonaceous biological 25 mg/L MSD 2017b oxygen demand (CBOD5) BOD 25 mg/L MWS 2011 Total suspended solids (TSS) 25 mg/L (unless caused by algae) MWS 2011 & MSD 2017b Fecal coliform or Escherichia coli 200/100 mL MWS 2011 & MSD (E.Coli) 2017b Unionized ammonia (as N) at 1.25 mg/L (for intermittently discharging MSD 2017b 15°C facilities) Total phosphorus 1 mg/L or a demonstrated nutrient reduction MWS 2011 & MSD strategy for facilities discharging < 820 kg/y 2017b of total phosphorus* * MSD confirmed that the proposed lagoon will not be required to meet the 1 mg/L total phosphorus limit, however, will require a demonstrated phosphorus reduction strategy (SNC-Lavalin 2019) Community Engagement

No formal public engagement process has taken place regarding the application for an Environment Act Licence for the proposed wastewater treatment facility. It is being constructed to replace an existing facility and is a necessary service for the community.

Environment Act Proposal Rapid City Lagoon Expansion

Description of Existing Development

SNC-Lavalin (2019) completed an assessment of the existing lagoon to determine its physical condition and current loading capacity. The current loading capacity was compared to the current and 25-year future service population to determine whether the existing system is sized appropriately or if an expansion / upgrade is required for licensing. The assessment is summarized below. Physical Lagoon Assessment

Engineers from SNC-Lavalin visited the lagoon site and associated lift station on 21 June 2017 and determined the lagoon is generally in good condition. Observations of the existing lagoon include:

› Berms appear to have only a moderate level of erosion consistent with the age of the lagoon and this erosion does not appear likely to result in compromise of the soil liner.

› There was some evidence of burrowing animals (thought to be moles) on the dry side of the berms. The burrows do not appear to move toward the liner side of the berm, however, SNC-Lavalin recommends the burrowing mammal population be managed.

› In a few areas wooded plants are seen to be growing on berms. SNC-Lavalin recommends these be removed.

› A low spot on the secondary cell berm above freeboard level was identified. During the spring of 2017, high water levels in the lagoon led to water pooling on the berm in this location. The low spot poses increased risk for berm overtopping and SNC-Lavalin recommends it be raised with compacted clay soil.

› The lagoon discharge valve is located on the interior slope of the secondary cell berm. The valve is operational however SNC-Lavalin recommends consideration should be made to build out the berm at that location and increase the extension stem of the valve to allow for access in the event of higher water levels.

A topographical survey of the lagoon was undertaken by Richmond Surveys (Brandon) in 2017. Cell dimensions and volumes were calculated based on the survey results (Table 2.1). The active volume in a cell is based on the volume between regular operating height (typically 1.5 m) and sludge storage height generally assumed to be 0.3 m above the bottom of the cell. This results in an active cell depth of 1.2 m for a typical lagoon. In addition, the primary cell storage volume is 50% of the active cell volume because it is assumed that 50% of the active cell volume is required for actual treatment of the incoming sewage. Therefore the total available winter storage volume is 100% of the secondary cell active volume + 50% of the primary cell active volume.

A sludge survey of both lagoon cells was carried out by Assiniboine Injectors in 2017 (Table 2.2). These sludge measurements indicate that primary cell desludging will likely be required within the next approximately five to ten years, especially in the near the truck dump.

Environment Act Proposal Rapid City Lagoon Expansion

Table 2.1 Existing lagoon cell dimensions and volume Dimension Units Primary Cell Secondary Cell Cell dimension (top of berm) m 120 x 130 120 x 85 Berm slopes - 4:1 4:1 Cell depth m 2.5 2.5 Total volume m3 33,100 20,700 Active volume m3 15,100 9,300 Winter storage volume m3 7,550 9,300

Table 2.2 Existing lagoon sludge volume and depth measurements Cell Total Sludge Volume (m3) Average Sludge Depth (mm) Primary cell 7,946 410 Secondary cell 1,969 240

Geotechnical Investigation

A geotechnical investigation was carried out to investigate the condition of the liner at the existing lagoon (SNC-Lavalin 2017; Appendix C). Five boreholes were drilled within the clay liner along the interior edge of the dykes of the existing sewage lagoon cells. Given that both cells were filled at the time of the investigation, no samples were obtained from the bottom of the lagoon. The in-situ hydraulic conductivity of the existing clay liner is 7.19 x 10-8 cm/s, which meets the MSD (2017b) guideline, where lagoon liners are required to contain at least one metre of soil having a permeability of less than 1x10-7 cm/s. Hydraulic Loading Assessment

Water purchase records, lift station pump hour records, and drawdown test results were used to develop an estimate of current hydraulic loading to the lagoon (Table 2.3). The 2015 and 2016 sales are similar whereas the 2017 sales indicate an approximately 12% increase in water sales. Total water sales include water main leaks, as much of the leaked volume of water is likely to infiltrate into the gravity sewer piping and eventually get pumped to the lagoon.

Table 2.3 Purchased water volumes and estimated wastewater production in Rapid City Units 2015 2016 2017 Annual volume. of purchased water m3 29,191 30,492 39,971* Average daily use m3/d 80.0 83.5 92.8 Per capita use L/cap/d 183 190 211 Per capita wastewater generation (85% of use) L/cap/d 155.6 161.5 179.4 *Projected based on January to June records

Water consumption rates may be used to approximate wastewater generation rates. In North America, about 60% to 90% of per capita water consumption becomes wastewater. Where landscape irrigation is limited (such as in winter in Manitoba) the conversion rate is closer to 90%. For the purposes of this study, it is assumed that 85% of the water consumed in Rapid City becomes wastewater. Based on this

Environment Act Proposal Rapid City Lagoon Expansion

assumption, wastewater generation due to domestic water use in 2016 was approximately 161.5 L/cap/d. This calculation does not consider inflow or infiltration into the gravity sewer system.

To understand the actual flows being pumped to the lagoon, a drawdown test was carried out (Table 2.4). The drawdown test measures the actual pumping rate of each lift station pump based on timed water level changes in the lift station during pumping. The purpose of the test is to verify the actual pumping rate of each pump, and when combined with pump hour records, gives an indication of total flow pumped to the lagoon, including inflow and infiltration.

Table 2.4 Pumping rates of Rapid City lift station pumps based on drawdown test Pump 1 (East Pump) Pump 2 (West Pump) Both Pumps Pumping rate (L/s) 3.52 4.89 6.34

Combining information from the drawdown test and recorded pump hours provides an indication of the actual wastewater flow conveyed to the lagoon including inflow and infiltration. Table 1.6 shows the total annual and average daily per capita wastewater flow based on recorded pump hours and measured flow for each pump. The pump hours records indicate that based on the pump rate calculated from the drawdown test, the annual total flow to the lagoon in 2016 and 2017 was approximately 28,940 m3 and 35,190 m3 respectively. These volumes correlate closely with purchased water volumes from 2016 and 2017 indicating that the actual average water usage per person is close to these calculated values. Comparing the calculated wastewater flow generated from domestic use (Table 2.3) with the pumped flow calculations provides an estimation of inflow and infiltration (Table 2.5).

Table 2.5 Annual flow to the existing lagoon based on drawdown test pump rates and pump hour records Units 2016 2017 Total annual flow m3/y 28,940 35,189 Average daily flow m3/d 79 96 Per capita daily flow (based on 440 people) L/cap/d 180 219 Inflow and infiltration estimation % 10.3 18.1

Current and Future Population and Loadings

Based on the discussion in Section 2.3, a per capita flow estimation of 220 L/cap/d was be utilized for the lagoon design criteria. This flow rate (which includes inflow and infiltration) is consistent with the 2017 flow data, and in the range of standard design flow rates which, for Manitoba, are typically around 250 L/cap/d where there is low industrial contribution and low inflow and infiltration (I&I).

The population of Rapid City is currently 440 people and is growing at approximately 0.5% per year, according to information provided by the RM of Oakview. The majority of these residents are connected to the wastewater collection system; hence, the lagoon service population is assumed to also be 440 people. It is currently unknown how much truck hauled sewage is disposed of at the lagoon. However, it is assumed that an additional truck haul loading equivalent to 5% of the service population (from residents with septic fields) is disposed of at the lagoon between June and October (135 days). This represents approximately 22 loads of septage per year which appears in line with what the RM of Oakview understands is being hauled to the lagoon. It is assumed that each load is approximately 4,000 L at a strength of 6 kg BOD/m3. RM of Oakview 648290 4 October 2019 © SNC-Lavalin Inc. 2019. All Rights Reserved. Confidential. 13

Environment Act Proposal Rapid City Lagoon Expansion

Using these assumptions of service population, population growth, hauled septage loading, and infiltration rates, Table 2.6 shows the calculated current and future populations and loadings to the lagoon along with the required treatment area and volume given current lagoon licensing standards.

Table 2.6 Current and future loading rates and treatment requirements Design Year Units 2017 2042 Population (0.5% growth) - 440 500 Assumed wastewater generation rate (including I&I) L/cap/d 220 220 Assumed truck haul volume m3/y 88 100 Daily hydraulic loading rate m3/d 97 110 230-day winter storage volume requirement m3 22,300 25,300 Summer daily organic loading rate (including septage) kg/d 38 43 Primary cell area requirement ha 0.67 0.76

Summary of Existing Lagoon Assessment

The wastewater treatment lagoon at Rapid City was found to be structurally sound with a suitably impermeable liner based on visual observations and geotechnical testing. The hydraulic conductivity of the clay liner sample was measured to be 7.19 x 10-8 cm/s. The hydraulic and organic loading assessment found the lagoon suitably sized to handle the organic loading from the 25-year design population but significantly undersized to handle the current and future winter storage requirements. Based on the 25-year design population of 500 people and the wastewater generation rate of 220L/cap/d the lagoon requires approximately 8,500 m3 of additional storage volume to satisfy the 230-day winter storage requirement. Description of Proposed Development Project Location

The unincorporated community of Rapid City is located south of the Little Saskatchewan River in the RM of Oakview, about 30 km north of the City of Brandon (Figure 1.1). The existing lagoon is located on NTS Map Sheet 062K01, on quarter sections 19-013-019-W1 and 20-013-019-W1. The proposed lagoon expansion is immediately south of the existing lagoon, located on Block 55 of NW 20-13-19-W1M, and immediately north of Provincial Road #270. Ownership of Land and Mineral Rights

Currently that land is owned by Manitoba Infrastructure however an agreement is in place to trade the land back to the RM in exchange for a nearby equivalent parcel of land (Appendix A).

The Crown oil and gas rights in the quarter section of the proposed expansion are portional (less than 100% Crown interest) (ID 2602077).

Environment Act Proposal Rapid City Lagoon Expansion

Existing Land Use

According to the draft Oakview Municipal Zoning Bylaw No. 2019-3, the land for the proposed expansion is zoned as Open Space / Recreation Zone. It is owned by Manitoba Infrastructure and currently only occasionally used for temporary road material storage (granular stockpile). The land appears to be mowed with the exception of a small tree stand.

Land use to the northwest, west, and southwest are zoned as Agricultural General Zone and land to the northeast, east, and southeast are zoned as Open Space / Recreation Zone. The lagoon is bordered by privately owned farmland to the west, the Little Saskatchewan River to the north, and the community of Rapid City to the east.

According to the bylaw, a sewage lagoon is a conditional use in the Agricultural General Zone and a wastewater treatment facility is a conditional use under the Open Space / Recreation Zone. Assessment of Alternatives

SNC-Lavalin (2019) evaluated three options for upgrading the lagoon to bring it into compliance with current legislation:

› Option 1: Add additional winter storage capacity by constructing a new secondary cell;

› Option 2: Build a new lagoon in a new location with sufficient winter storage capacity; and

› Option 3: Implement tertiary treatment with a submerged attached growth reactor (SAGR) system to allow for continuous or nearly continuous discharge from the lagoon, significantly reducing, or eliminating the need for winter storage capacity.

Option 1 was the recommended system, as it was the least expensive and simplest option to upgrade the Rapid City lagoon. It will maximize the use of the existing infrastructure and continue with facultative treatment which is simple to operate and maintain.

The assessment also looked at two locations for Option 1, including immediately west and south of the proposed lagoon. Giving the proximity of the lagoon to the Little Saskatchewan River to the north and the community to the east, expansion can only be to the west and south. Investigation into the availability of land south of the lagoon revealed that it is owned by Manitoba Infrastructure, who, upon initial discussions, did not appear willing to sell the land to the RM. Therefore, consideration for installing an additional cell immediately west of the lagoon was pursued. However, soils testing showed that soils immediately west of the lagoon was too permeable which would require importing clay or installation of a synthetic liner, and the landowner who owns the land west of the lagoon is unwilling to sell the land to the RM. Further discussions with Manitoba Infrastructure have indicated that they are willing to trade the land south of the lagoon to the RM in return for a similar parcel of land nearby.

Environment Act Proposal Rapid City Lagoon Expansion

Proposed Expansion

The proposed expansion includes adding winter storage capacity through the construction of a new, soil- lined secondary treatment cell, as well as a new concrete truck dump spillway into the primary cell. A preliminary drawing for the proposed expansion is presented in Appendix B. During regular operation, wastewater will flow from the primary cell into the new secondary cell and then on to the existing secondary cell. Treated water will be discharged along the existing discharge route which runs northwest from the discharge point at the northeast corner of the existing secondary cell down to the Little Saskatchewan River (Figure 1.1). Batch discharge will continue to occur once in the spring and once in the fall.

The expansion will utilize the existing pump station / forcemain infrastructure and provide an additional 25 years of wastewater treatment capacity. The new lagoon cell will be roughly 0.75 ha in area at a standard 1.5 m operating depth (Table 3.1). It will be designed with a 1.0 m recompacted soil liner (or synthetic liner if suitable soil is unavailable) with a hydraulic conductivity of 1 x 10-7 cm/s or less. The development will also include interconnection piping and valves, and a new locking gate and fence improvements.

The design has been prepared in accordance with the Design Objectives for Wastewater Treatment Lagoons (MSD 2017a). The proposed expansion is located approximately 260 m southwest of the nearest residence which is within the 300 m recommended buffer distance to individual homes (MSD 2017a). However, the new cell is located further away from the residence than the existing cells and will improve the function of the lagoon decreasing potential odours.

Table 3.1 Summary of the proposed cell design parameters; all dimensions are approximate Units Proposed Secondary Cell Treatment facultative Design depth m 2.5 Freeboard m 1.0 Effective depth m 1.5 (including 0.3 m sludge storage depth) Design volume m3 8,500 Dimensions m see Appendix B Liner - 1 m scarified and compacted overlain by 1 m thick recompacted liner with a hydraulic conductivity of 1 x 10-7 cm/s or less Top of berm width m 3.0 The embankment slope in the cell is set at 4 horizontal to 1 vertical

Geotechnical Investigation A geotechnical investigation was carried out to gain an understanding of the soil conditions directly west of the existing cells to determine the feasibility of construction of an additional cell in that area, as at the time of the investigation it was not considered possible to acquire the land south of the lagoon (SNC-Lavalin 2017; Appendix C).

Four boreholes were drilled immediately west of the existing secondary cell to assess the hydraulic conductivity of the in-situ soils and groundwater elevation. Sand and gravels having a hydraulic conductivity

Environment Act Proposal Rapid City Lagoon Expansion

of greater than 1x10-7 cm/s were encountered in four of the five boreholes. The groundwater table ranged from 2.1 mbgl to 4.3 mbgl.

The wide variability of the soils encountered west of the existing lagoon do not allow a good estimation of the soil type expected south of the existing lagoon. Soils immediately west of the lagoon do not meet the MSD (2017b) guideline for hydraulic conductivity, hence would require importing clay or installation of a synthetic liner. It is recommended that additional soils testing is carried out in the land south of the lagoon to demonstrate whether it will be feasible to construct a recompacted soil liner with the in-situ soil in that location.

Classification of the Wastewater Treatment System The proposed wastewater treatment system must be classified in accordance with the Water and Wastewater Facilities Operators Regulation 77/2003 under the Environment Act. The completed application for the wastewater treatment facility classification is included in Appendix D. It is expected that the upgraded lagoon system will be classified as a Class 1 wastewater treatment facility.

Phosphorus Reduction Strategy The proposed wastewater treatment system is designed to serve a population of approximately 500 people. The MWQSOG indicate that a demonstrated nutrient (phosphorus) reduction strategy should be included for any new or expanding facilities of this size. As such, coagulant dosing (alum or ferric chloride) is proposed to be the reduction strategy utilized at the Rapid City Lagoon. The proposed method is by injection from a boat or pontoon located in the secondary cell(s). Coagulant dosing will not be carried out in the primary cell. The method for applying the coagulant by boat to the cells to be discharged is well established and is not described further here. Testing before and after coagulant dosing will be carried out to determine the approximate coagulant dosing rate required as well as confirming that sufficient nutrient reduction has occurred to satisfy license requirements before discharge.

Lagoon Operation and Maintenance Operation will include the automatic pumping of wastewater collected at the lift station to the lagoon and managing spring and fall discharge events. Discharge events require cell isolation and sampling prior to discharge, and application of additional treatment measures such as alum injection if required for total phosphorus reduction.

The regular maintenance required for the system will include:

› Maintenance of lift stations and manhole;

› Road maintenance: scraping and leveling once every second year or as required. Dust inhibitors and snow removal as required. Re-surfacing and re-compaction about every five to seven years;

› Ditch and berm maintenance (mowing) once per year;

› Inspection of berms for burrowing animals;

› Coagulant dosing on cells to be discharged;

Environment Act Proposal Rapid City Lagoon Expansion

› Collection of effluent samples for laboratory analysis prior to discharge to ensure compliance with Environment Act License; and

› Sludge removal from the cells via dredging. Sludge will likely need to be removed from the cells roughly as follows: in the next approximately five to ten years and every 20 years thereafter from the primary cell and secondary cells.

Records of the operation and maintenance program will be maintained by the RM of Oakview.

Operator Requirements The lagoon operator will be classified as a Class 1 operator. The operator will be required to: exercise valves; perform regular inspections of the lift station, the inter-cell connection pipes and valves, and outfall. The operator will also be required to remove aquatic plants and rodents which can damage the cell liner or cause structural damage to the dyke itself; and sample the effluent and review the analytical results.

Decommissioning The RM of Oakview has long-term plans for the continued operation of the wastewater treatment facility and plans to operate this facility as long as it is required by the community and in good working condition. In the future, should the lagoon require decommissioning, all applicable regulations and guidelines will be followed. The overall objective of decommissioning and reclamation will be to return lands disturbed to a condition that is physically stable, safe and environmentally consistent with the land use and landscape of the day. At the time of facility closure, the following decommissioning activities are anticipated:

› Aboveground pipelines will be removed. Subsurface pipelines will be purged, capped and buried;

› Areas where contaminated soils may be present will be assessed and remediated as required;

› Water retention ponds will be backfilled;

› Surface drainage conditions will be restored to a state similar to pre-existing conditions; and

› Disturbed areas will be reclaimed, including re-contouring, replacing topsoil, and revegetating to restore the land surface to as near as possible to the original conditions.

Schedule The project is currently in the design phase and the final schedule is being developed. The preliminary schedule for the project is outlined in Table 2.2, however is subject to change. Construction is tentatively scheduled to commence in May 2020, pending receipt of regulatory approvals and funding, and is expected to take two to four months to complete. The design life of the facilities is 25 years.

Table 3.2 Preliminary project schedule Task Date (estimated)

Environment Act Proposal Rapid City Lagoon Expansion

Workforce

Construction of the lagoon will require a crew of about four workers for two months and operation will require one part-time operator. Description of Environment Climate

Rapid City is located within the Hamiota Ecodistrict, which has continental climate with short, warm summers and long, cold winters (Smith et al. 1998). Climate normals from 1981 to 2010 for the region were obtained from the Brandon Environment and Climate Change Canada [ECCC] meteorological station located at 49o 54’ 36” N and 99o 57’ 07” W at an elevation of 409 masl (ECCC 2019a). In general, precipitation falls as snow during the winter months, with the greatest snowfalls occurring from November through March. Annual average precipitation is 474 mm, with 25% occurring as snowfall. The daily average temperature is approximately 2.2 ºC and ranges between a mean of 18.5 ºC in July and -16.6 ºC in January. Physiography, Terrain and Soils

Rapid City is located within the Hamiota Ecodistrict of the Aspen Parkland Ecoregion of the Prairies Ecoregion (Smith et al. 1998; Manitoba Land Initiative 2019). The ecodistrict is located along the southern, lower slopes of Riding Mountain with a mean elevation of about 518 metres above sea level (masl). The area is undulating to hummocky and kettled glacial till plain. River valleys of the Birdtail and Minnedosa (Little Saskatchewan) Rivers flow south through the area to the Assiniboine River. Rapid City is located in the Little Saskatchewan River Valley (RM of Oakview 2019).

Soils in the ecodistrict are dominated by well-drained Black Chernozems developed on strongly calcareous glacial till derived from local bedrock shale, limestone and granitoid rocks (Smith et al. 1998). Local areas of imperfectly drained, variably saline and carbonated Gleyed Rego Black Chernozems ring poorly drained Gleysolic soils in depressions. According to the Manitoba Land Initiative (2019) maps, soils in the footprint of the existing lagoon and proposed expansion are Newdale loam to clay loam. Surficial Geology and Groundwater

The surficial geology compilation map series were reviewed for the region (Matile and Keller 2004). The surficial geology surrounding Rapid City is variable and consists of a calcareous clay diamicton till with areas of distal glaciofluvial sediments and bedrock outcrop near the river.

SNC-Lavalin conducted a search of the Groundwater Information Network (2019) to identify third party groundwater users in the vicinity of the lagoon. At least three dozen wells were identified within the town and surrounding properties on the south side of the river, with additional wells on the north side of the river. A review of the well logs shows the majority of the wells appear to be test wells, with a few domestic wells and some municipal wells. Many of the wells are <5 m deep, and many show a sand layer in the first few metres which is often underlain by till.

Environment Act Proposal Rapid City Lagoon Expansion

The geotechnical investigation included the drilling of four boreholes directly west of the existing lagoon (SNC-Lavalin 2017; Appendix C). The investigation also showed a variable surficial geology profile:

› BH7 and BH9 – topsoil (0 mbgl to 0.15 mbgl), fine-grained sand (0.15 mbgl to 2.9 mbgl -3.8 mbgl), fine- to coarse-grained gravel (2.9 mbgl and 3.8 mbgl to 4.6 mbgl);

› BH6 – the sand and gravel layers were separated by a 2 m thick layer of glacial clay till (1.68 mbgl to 3.66 mbgl); and

› BH8 – topsoil (0 mbgl to 0.15 mbgl), glacial clay till (0.15 mbgl to 0.91 mbgl), and silty, high plastic clay (0.91 mbgl to 5.2 mbgl).

The groundwater table ranged from 2.1 mbgl to 4.3 mbgl. Surface Water

Rapid City is located on the banks of the Little Saskatchewan River. The Little Saskatchewan River originates in Riding Mountain national Park, flows south through the communities of Minnedosa and Rapid City, and joins the Assiniboine River west of Brandon. The river is an important municipal water supply for the region. The Rapid City Dam and Reservoir is one of three man-made reservoirs (Minnedosa, Rapid City, and Lake Wahtopanah), which provides a water supply and recreational facility for the community.

The Little Saskatchewan River Conservation District that has developed an integrated watershed management plan for the watershed which includes goals related to reducing excessive nutrient levels (Little Saskatchewan River Conservation District 2008 and 2011). Biological Environment

The Manitoba Conservation Data Centre (MBCDC) was contacted for a search of their database for rare species in NW-20-013-019-W1, plus a two-kilometre buffer, and no occurrences were found (Appendix E). The MBCDC (2019) list of plant and animal species in the Aspen Parkland Ecoregion and their conservation status ranks are presented in Appendix F.

Vegetation The natural vegetation of the Hamiota Ecodistrict is park-like due to the presence of trees surrounding depressions and grasslands on the slopes and knolls (Smith et al. 1998). Much of this vegetation has disappeared due to cultivation. Under natural conditions, wet depressions have aquatic vegetation which is ringed by slough grass, sedges, and rushes, then surrounded by willows and then trembling aspen, and bordered by shrubs composed of prairie rose, silverberry, snowberry and others. Upland areas, if not cultivated, consist of a grassland of pasture sage, grama grass, June grass, anemone, chickweed, etc., while the intermediate slopes have little bluestem, spear grass, ragwort, and other grasses and forbs.

In the northern part of the ecodistrict towards the boundary with the Boreal Transition Ecoregion, the amount of tree cover increases (Smith et al. 1998). Trees are found in moist areas, around depressions, and on lower slopes. There is more extensive tree cover along the north and east facing slopes of river valleys. A variety of deciduous tree species are found on stream embankments and floodplains. RM of Oakview 648290 4 October 2019 © SNC-Lavalin Inc. 2019. All Rights Reserved. Confidential. 20

Environment Act Proposal Rapid City Lagoon Expansion

Wildlife The Aspen Parkland Ecoregion has been affected by agricultural development, and losses of grassland and wetland habitat have affected the species distributions and populations (Smith et al. 1998). Mammals including white-tailed deer, coyote, red fox, ground squirrel, cottontail rabbit, hare, striped skunk, redback vole and deer mice are widespread throughout the ecoregion. The ecoregion is also home to many bird species, including ferruginous hawk, sparrow hawk, red-tailed hawk, mourning dove, black-billed magpie, red-winged blackbird, killdeer, meadowlark, and various species of ducks. Red-sided and wester plains garter snakes are also common.

Fish and Fish Habitat There are three major dams on the Little Saskatchewan River (Minnedosa, Rapid City, and Rivers), each of which have created reservoirs that have developed into sport fisheries (Little Saskatchewan River Conservation District 2008). Two pool and riffle fish ladders have been constructed in an attempt to re- establish traditional fish migration routes on the river. The Rapid City fish ladder was constructed in 1992, however the river dams remain a barrier to fish movement. According to McCulloch and Franzin (1996), approximately 20 species of fish have been found in the Little Saskatchewan River.

Table 4.1 Fish species found in the Little Saskatchewan River (McCulloch and Franzin 1996) Scientific name Common name Esox lucius northern pike Cyprinus carpio common carp Luxilus comutus common shiner Margariscus margarita Allegheny pearl dace Notropis dorsalis bigmouth shiner Notropis hudsonius spottail shiner Pimephales promelas fathead minnow Rhinichthys atratulus eastern blacknose dace Rhiniichthys cataractae longnose dace Semotilus atromaculatus common creek chub Catostomus commersoni white sucker Moxostoma macrolepidotum shorthead redhorse Noturus flavus North American freshwater catfish Lota burbot Culaea inconstans brook stickleback Ambloplites rupestris rock bass Etheostoma nigrum johnny darter Perca flavescens yellow perch Percina maculata blackside darter Stizostedion vitreum walleye

Environment Act Proposal Rapid City Lagoon Expansion

Socio-Economic Environment

Rapid City is an unincorporated community with a population of 440 people. It is recognized as a local urban district that also once held town status within the Rural Municipality of Oakview (RM of Oakview 2019). Most of the land in the Hamiota Ecodistrict is cultivated for the production of spring wheat, other cereal grains, oils seeds and hay crops (Smith et al. 1998). The more saline soils are used for pasture and hay production. Heritage Resources

The Manitoba Historic Resources Branch (HRB) examined the proposed area of disturbance in conjunction with their records and did not have any concerns (Appendix E). However, if any development is proposed north of the lagoon in Block 37 or west of the lagoon in Lot 1, then a heritage resource impact assessment would be required. Description of Environmental Effects and Mitigation Measures Effects and Mitigative Measures

This chapter identifies potential environmental effects of the proposed project and mitigative measures to eliminate or reduce these effects.

Atmospheric Environment Effects Potential effects to the atmospheric environment include:

› Dust from moving vehicles and earthworks during construction.

› Vehicle exhaust and noise emissions from heavy equipment during construction and sewage haul trucks during operation.

› Release of methane, H2S, and NOX during wastewater treatment.

› Odours generated during operation (release of H2S under anaerobic conditions) and maintenance (sludge removal) of the lagoon.

Mitigation The following are mitigation and environmental design measures to minimize effects to the atmospheric environment:

› Dust suppression will be used during construction as required

Environment Act Proposal Rapid City Lagoon Expansion

› Appropriate speed limits will be used during construction.

› Vehicle idling will be minimized, and vehicles / equipment will be properly maintained.

› Construction workers will use hearing protection if required.

› Disturbed areas will be re-vegetated as soon as practical where required.

› The existing primary cell is larger than required to meet the organic loading requirements outlined by MSD (2017a) for the 25-year design population therefore odour issues are not expected to develop as flows increase from population growth. The lagoons are designed as facultative systems with a shallow cell depth which minimizes the potential of odours developing from anaerobic conditions.

› The proposed expansion is located approximately 260 m southwest of the nearest residence which is within the 300 m recommended buffer distance to individual homes (MSD 2017a). However, the new cell is located further away from the residence than the existing cells and will improve the function of the lagoon decreasing potential odours.

Terrain and Soils Effects The project will require disturbance to a surficial area of approximately 0.75 ha of land and excavation of approximately 11,250 m3 of soils will be excavated. Potential effects to soils include:

› Removal of soils during clearing and excavation.

› Potential soil compaction/mixing from heavy equipment during construction.

› Soil loss from erosion due to wind and precipitation/runoff during construction.

› Discharge from the lagoon could result in erosion along the discharge path during operation.

› Potential for erosion of berms during operation.

Mitigation The following are mitigation and environmental design measures to minimize effects to soils:

› Overburden soils will be removed in a separate lift and stockpiled to preserve materials for re-use on the berms.

› If possible, the material used to construct the berms will be taken from the lagoon excavation to avoid the need for a borrow source.

› Vehicle and equipment movement will be limited to designated pathways in and around work areas to minimize effects to soil.

Environment Act Proposal Rapid City Lagoon Expansion

› Disturbed/exposed areas will be kept to a minimum and re-vegetation of disturbed areas will occur as soon as practically possible.

› The RM of Oakview will conduct a geotechnical investigation within the footprint of the proposed expansion to determine if it is feasible to construct a recompacted soil liner with the in-situ soil in that location. If not, the lagoon will require the importing of clay or construction of a synthetic liner. The RM of Oakview is committed to design the lagoon to meet the MSD (2017a) Design Objectives for Wastewater Treatment Lagoons.

Groundwater Effects Potential effects to groundwater include:

› There is potential for effects to groundwater if the wastewater leaks/seeps through the lagoon liner into the groundwater or if there is a leak in the pipeline.

Mitigation The following are mitigation and environmental design measures to minimize effects to groundwater:

› The RM of Oakview will investigate/repair leaks if discovered.

Surface Water Effects Potential effects to surface water include:

› The wastewater treatment system will release treated effluent which will flow into the Little Saskatchewan River, and may include coliforms, organic wastes, suspended solids and other contaminants which could affect water quality and fish.

Mitigation The following are mitigation and environmental design measures to minimize effects to surface water:

› The lagoon expansion has been designed to meet the regulated discharge limits. Testing prior to discharge will ensure that the discharged effluent will meet the licensed limits for coliforms, unionized ammonia, organic content (BOD), suspended solids, and total phosphorus.

› The effluent will be discharged on land where there will be some uptake of effluent nutrients into the ground prior to entering the Little Saskatchewan River.

Environment Act Proposal Rapid City Lagoon Expansion

Biological Environment Effects Potential effects to the biological environment include:

› Clearing of a small tree stand.

› Potential destruction/damage to migratory bird nests during construction.

Mitigation The following are mitigation and environmental design measures to minimize effects to the biological environment:

› Migratory birds and their eggs are protected under the Migratory Birds Convention Act, 1994 and The [Manitoba] Wildlife Act. ECCC (2019b) and the Manitoba Conservation Data Centre (MBCDC 2015) recommend scheduling disruptive activities outside of the migratory bird nesting period. This period occurs between mid-April and late-August within the project area. Clearing during the breeding bird period will be avoided if possible. If avoidance of clearing during this window is not possible, any identified birds and their nests should be protected by no access setbacks. Setbacks should be placed in accordance with the MBCDC (2015) recommendations.

› A perimeter fence will be constructed around the wastewater treatment system during operation to prevent wildlife from entering the facility.

Socio-economic Effects Effects and Mitigation Potential effects to the socio-economic environment are minimal, as the land is currently only occasionally used for temporary road material storage (granular stockpile) by Manitoba Infrastructure.

The project is expected to benefit the community through the creation of temporary construction jobs and the development of a wastewater facility that can accommodate the long-term needs of the community.

Heritage Resources Effects The HRB examined the proposed area of disturbance in conjunction with their records, and did not have any concerns with the project at its proposed location (Appendix E). Although heritage resources are not expected, there is the potential for an unexpected discovery during excavation.

Mitigation If any suspected heritage resources are discovered during construction, work will cease until a heritage resource management strategy is implemented to mitigate the effects of development on the heritage resources. If any development is proposed north of the lagoon in Block 37 or west of the lagoon in Lot 1, the RM of Oakview will contact the HRB to determine if a heritage resource impact assessment is required.

Environment Act Proposal Rapid City Lagoon Expansion

Unplanned Events and Upset Conditions Effects Potential effects from accidents and malfunctions include:

› Potential risk of a fuel spill (i.e. hydraulic fluid) during construction due to the use of heavy equipment has the potential to affect soils and groundwater.

› Potential health and safety accident during construction or operation.

› Excessive inflow into the lagoon could cause overfilling of the cells and risk of overtopping.

Mitigation The following are mitigation and environmental design measures to minimize effects from accidents and malfunctions:

› Heavy equipment utilized on site during construction will be properly maintained and visually inspected for issues/leaks on a daily basis. There will be spill kits onsite to manage any spills that may occur. Any reportable spills of a hazardous substance will be immediately cleaned up and reported to the Manitoba Sustainable Development Environmental Emergency line at 204-944-4888.

› All work will be conducted in accordance with workplace health and safety regulations.

› The site will be protected from entrance of unauthorized personnel through the installation of a locked perimeter fence.

› Lagoon operators monitor lagoon levels daily. If lagoon levels rise beyond normal and potential for overtopping is foreseen, the RM can apply for an emergency discharge to the province to discharge excess liquid to avoid lagoon overtopping.

Effects of the Environment on the Project Effects › Potential effects of the environment on the project include:

› Severe weather, including high winds, heavy precipitation and storm events has the potential to affect the project during construction. It may affect material placement/compaction, grading, re-vegetation as well as result in erosion and/or dust.

› Burrowing animals have the potential to affect the integrity of the berms.

Mitigation The following are mitigation and environmental design measures to minimize effects from the environment:

› Protection of material stockpiles from extreme weather events as required.

Environment Act Proposal Rapid City Lagoon Expansion

› Cease of construction during severe weather.

› Management of burrowing animals during operation. Closure

This Environment Act Proposal has been prepared by SNC-Lavalin Inc. on behalf of the Rural Municipality of Oakview for submission to Manitoba Sustainable Development.

Submitted by:

SNC-LAVALIN INC.

Prepared by:

Lyndsey MacBride, M.Sc., P.Geo. Operations Manager, Impact Assessment and Community Engagement, Manitoba

Reviewed by:

Francesco Zurzolo, M.Sc., P.Eng. Process Engineer

Environment Act Proposal Rapid City Lagoon Expansion

References

Environment and Climate Change Canada. 2019a. Canadian Climate Normals. URL: http://climate.weather.gc.ca/climate_normals/index_e.html (accessed May 2019).

Environment and Climate Change Canada. 2019b. Guidelines to reduce risk to migratory birds and General nesting periods of migratory birds. URL: https://www.canada.ca/en/services/environment/wildlife- plants-species/migratory-birds.html (accessed May 2019).

Groundwater Information Network. 2019. URL: http://analysis.gw-info.net/gin/publicgin.aspx (accessed May 2019).

Little Saskatchewan River Conservation District. 2008. Little Saskatchewan River State of the Watershed Report. July 2008. URL: http://littlesaskatchewanrivercd.ca/wp- content/uploads/2011/01/LSR_SOW_July-9-2008.pdf (accessed May 2019).

Little Saskatchewan River Conservation District. 2011. Little Saskatchewan River Integrated Watershed Management Plan. URL: http://littlesaskatchewanrivercd.ca/wp-content/uploads/2011/01/LSR- IWMP.pdf (accessed May 2019).

Manitoba Conservation Data Centre (MBCDC). 2015. Recommended Development Setback Distances from Birds. 24 June 2015. URL: https://www.canada.ca/en/services/environment/wildlife-plants- species/migratory-birds.html.

Manitoba Conservation Data Centre (MBCDC). 2019. Species List by Ecoregion URL: http://www.manitoba.ca/sd/environment_and_biodiversity/cdc/index.html (accessed May 2019).

Manitoba Land Initiative. 2019. Core Maps – Data Warehouse. URL: http://mli2.gov.mb.ca/about_us/index.html (accessed May 2019).

Manitoba Sustainable Development. 2017a. Information Bulletin – Design Objectives for Wastewater Treatment Lagoons. October 2017. URL: https://www.gov.mb.ca/sd/eal/publs/Lagoon_Design_Guidelines_2017_10.pdf (accessed May 2019).

Manitoba Sustainable Development. 2017b. Information Bulletin – Environment Act Proposals for Wastewater Treatment Facilities – Supplementary Guidelines. October 2017. URL: https://www.gov.mb.ca/sd/eal/publs/info_eap_wwtf_2017_10.pdf (accessed May 2019).

Manitoba Sustainable Development. 2018. Information Bulletin – Environment Act Proposal Guidelines. March 2018. URL: https://www.gov.mb.ca/sd/eal/publs/eap_report_guidelines_march_2018.pdf (accessed May 2019).

Manitoba Water Stewardship. 2011. Manitoba Water Quality Standards, Objectives and Guidelines. 28 November 2011. URL: https://gov.mb.ca/sd/pubs/water/mb_water_quality_standard_final.pdf (accessed May 2019).

Environment Act Proposal Rapid City Lagoon Expansion

Matile GLD and Keller GR. 2004. Surficial geology of the Riding Mountain map sheet (NTS 62K), Manitoba. Manitoba Industry, Economic Development and Mines, Manitoba Geological Survey, Surficial Geology Compilation Map Series SG-62K, scale 1:250 000. URL: https://www.manitoba.ca/iem/geo/gis/surfgeomap.html (accessed May 2019).

McCulloch BR and Franzin WG. 1996. Fishes of the Canadian portion of the Assiniboine River drainage. Canadian Technical Report of Fisheries and Aquatic Sciences 2087. 62 p. URL: http://publications.gc.ca/collections/collection_2012/mpo-dfo/Fs97-6-2087-eng.pdf (accessed May 2019).

Rapid City. 2019. Community Website. URL: http://www.rapidcitymb.ca/ (accessed May 2019).

Rural Municipality of Oakview. 2019. Community Website. URL: https://rmofoakview.ca/ (accessed May 2019).

Smith, R.E., Veldhuis, H., Mills, G.F., Eilers, R.G., Fraser, W.R., and Lelyk, G.W. 1998. Terrestrial Ecozones, Ecoregions, and Ecodistricts of Manitoba. An Ecological Stratification of Manitoba’s Natural Landscapes. Agriculture and Agri-Food Canada: Research Branch Technical Bulletin 1998- 9E. URL: http://publications.gc.ca/collections/collection_2017/aac-aafc/A54-8-1998-9-eng.pdf (accessed May 2019).

SNC-Lavalin Inc. 2017. Geotechnical Investigation for Rapid City, Manitoba, Sewage Lagoon. Prepared for the Manitoba Water Services Board. 648290. 21 December 2017.

SNC-Lavalin Inc. 2019. RM of Oakview – Rapid City Lagoon Assessment Report. 648290-1000-0000. 18 April 2019.

Appendix A

Land Purchase Agreement

Appendix B

Preliminary Engineering Drawings

PART N.E. 1/4 SEC. 9-13-19 WPM BLOCK 28

5TH AVENUE

DISCHARGE ROUTE

BLOCK 37

6TH AVENUE

PARCEL A PLAN 5226 NLTO EXISTING LAGOON

EXISTING LAGOON 9TH STREET BLOCK 46 TRUCK DUMP LOCATION (SEE DRAWING 648290-0000-4GDD-0901 FOR ADDITIONAL DETAILS)

LOT 1 PLAN 7510 NLTO

47 m 1.2 m ACTIVE STORAGE VOLUME ≈ 8,500 m3 PART N.E. 1/4 SEC. 9-13-19 WPM 84 m

3 m TYP.

BLOCK 55

HIGHWAY 270

10TH STREET

77 m 30.18 m 0 10 30 50 m ROAD ALLOWANCE 1:1,500 GOVERNMENT ROAD ALLOWANCE 1. DISTANCESAREINMETRES(m). (SEE DETAIL) BOLLARD

1% 1% 0.915 m 0.6 m 0.9 m RIPRAP 3.0 m 3.0 m 1% 4.0 m BOLLARD DETAIL LEGEND NOT TOSCALE NOTES NOT FORCONSTRUCTION 0.15 m 0.305 mØ PAINT SAFETYYELLOW ROUNDED CONCRETECAP 0.15 mØGALVANIZEDPIPEFILLEDWITHCONCRETE. 40 WIDESILVERREFLECTIVETAP 1.0 CURBCUT BOLLARD BOLLARD 0.30 m 20 MPaCONCRETE 20 mmDOWNCRUSHEDSTONE 10 [email protected]. 0.15 m 5.2 m This drawingwaspreparedfortheexclusiveuseof RM ofOakview(the"Client"). REV A20190715 PA Unless otherwiseagreed in writingbySNC-LavalinInc.,SNC-LavalinInc.does property ofsuch parties,asdetermined bytheapplicableservices contractor not acceptanddisclaimsany andallliabilityorresponsibilityarisingfromany intellectual propertyrights embodiedorreferencedinthisdrawingremainthe use oforrelianceonthisdrawing byanythirdpartyormodification misuse ofthisdrawingby the Client.Thisdrawingisconfidentialandall 1 CONCRETE TRUCKDUMPSECTION DATE DWG No CONCRETE TRUCKDUMPPLAN contracts between SNC-LavalinInc.and theClient. 4 10.3 m REFERENCE DRAWINGS NOT TOSCALE NOT TOSCALE 10.3 m DESCRIPTION DISCLAIMER REVISIONS - DESCRIPTION 0.15 mEDGECURB 25 mmDEEP SAW CUT DES INSTALLED RIPRAP O-- - EO - DRN CHK APP REINFORCEMENT -NO.6WELDEDWIREFABRIC, "FIBERMESH" OR10MSTEEL@300EACHWAY. CONCRETE -20MPa. CEMENT -TYPE50SULPHATERESISTANT. DATE 0.3 m CLIENT TITLE NOT TOSCALE 2019 0715 RM OFOAKVIEW CONCRETE TRUCK DUMPDETAIL 2.0 m DWG No 0.3 m 42000-GD00 - 648290-0000-4GDD-0901 PROJECT LOCATION INSTALLED RIPRAP 2.0 m 300 mmTHICK RAPID CITY,MANITOBA CELL BOTTOM 2.0 m FIG REV PA

G:\CADD_Data\Francesco Lagoon\Truck Dump Detail.dwg Date Plotted: July 15, 2019 8.5X11

Appendix C

Geotechnical Investigation

SNC-Lavalin Inc. 148 Nature Park Way Winnipeg, MB Canada R3P 0X7

Telephone: +1.204.786.8080 Fax: +1.204.786.7934

September 23, 2019

Manitoba Water Services Board Unit 1A – 2010 Currie Blvd. Brandon, Manitoba, Canada R7B 4E7

ATTN: Paul Macaraeg, EIT, Project Engineer

RE: Geotechnical Investigation for Rapid City, Manitoba Sewage Lagoon

1 INTRODUCTION

This report presents the results of the geotechnical investigation conducted by SNC-Lavalin for evaluation of the clay liner of the existing sewage lagoon located southeast of the community of Rapid City, Manitoba. The geotechnical investigation had two objects which are summarized below: 1) To determine if the clay liner of the existing lagoon met Manitoba Conservation’s Environmental guidelines which require a liner having a permeability less than 1x10-7 cm/s; and, 2) Gain an understanding of the soil conditions within the proposed new cell area to determine the feasibility of construction of an additional cell directly the west of the existing cells. This letter summarizes the geotechnical investigation and provides results of the lab testing performed on the existing lagoon clay liner and a geotechnical evaluation to determine the suitability for the design of a new cell for the existing sewage lagoon. 2 SITE LOCATION AND DESCRIPTION

The subject site is located south west of the community of Rapid City, Manitoba. The existing sewage lagoon is surrounded by privately owned farm last to the west, the Little Saskatchewan River to the north and the community of Rapid City to the east. Access to the sewage lagoon is obtained off of PR 270 which borders the site to the south. The location of the sewage lagoon is shown in Figure 1, Appendix I. The land is relatively flat but drops slightly towards to the west end of the proposed new cell. 3 SCOPE OF WORK

The following scope of work was completed:

• Field investigation consisting of five (5) geotechnical boreholes near the surface of the existing clay liner in both existing cells and four (4) boreholes with in the proposed new cell footprint, logging of soils and collection of soil samples for laboratory testing.

• Laboratory testing of selected soil samples obtained from the boreholes, including water contents and Hydraulic Conductivity tests; and,

SNC-Lavalin Inc. September 23, 2019 648290 Page 2

• Preparation of a letter report summarizing the field investigation, laboratory testing results and suitability of the site for the construction of an additional cell. 4 GEOTECHNICAL INVESTIGATION DETAILS

4.1 Geotechnical Drilling Investigation

The field investigation was conducted on November 14, 2017. Paddock Drilling Ltd. from Brandon, Manitoba utilized a track-mounted drill rig equipped with solid stem augers to drill the boreholes. During this investigation the geotechnical boreholes were drilled to depths ranging from 0.9 m below existing ground level (in boreholes BH1 to BH5) to 4.6 to 5.2 m below existing ground level within the proposed new lagoon cell footprint (BH6 to BH9). The borehole coordinates were obtained using a handheld GPS unit. The locations of the boreholes are presented on site plan, as Figure 1 (Appendix I).

4.1.1 Borehole Drilling A total of five (BH1 to BH5) boreholes were drilled within the existing sewage lagoon clay liner and four boreholes (BH6 to BH9) within the proposed sewage lagoon addition footprint. Relatively undisturbed clay soil samples were obtained in thin wall Shelby tube samplers in boreholes BH1 to BH5 and BH8. Disturbed soil samples were collected from the auger cuttings (grab samples) from boreholes BH6, BH7 and BH9. All soil samples were transported to the SNC-Lavalin soil testing laboratory in Saskatoon, Saskatchewan. The soil samples were stored in a humidity-controlled room to prevent drying prior to testing. Soil samples collected from the boreholes are identified on the borehole logs in Appendix II. The Terms and Symbols used on the borehole logs are provided in Appendix II, preceding the borehole logs. The boreholes were backfilled with bentonite chips to surface.

4.1.2 Geotechnical Laboratory Testing Geotechnical laboratory tests were conducted on soil samples obtained from the boreholes. The laboratory analyses included water contents on all grab samples obtained and a Hydraulic Conductivity test on the Shelby tube sample from borehole BH2. The detailed laboratory test results are provided in Appendix III. Select laboratory test results are also annotated on the borehole logs presented in Appendix II. 5 SUBSURFACE CONDITIONS

5.1.1 Soil Profile The shallow boreholes drilled within the existing clay liner (BH1 to BH5) consisted of a thin layer of organics at the surface underlain by silty, high plastic clay to the depth explored (~0.9 m). The soil profile located within the proposed sewage lagoon addition footprint varied throughout the study area. Boreholes BH7 and BH9 consisted of topsoil at the surface (~0.15 m) underlain by fine grained sand

SNC-Lavalin Inc. September 23, 2019 648290 Page 3

extending to depths ranging from 2.9 to 3.8 mbgl in boreholes BH9 and BH7, respectively. The sand was further underlain by fine to coarse grained gravel to the depths explored (~4.6 mbgl). In borehole BH6, the sand and gravel layers were separated by a 2 m thick layer of glacial clay till. Borehole BH8 consisted of topsoil at the surface underlain by a 0.7m thick layer of glacial clay till and silty, high plastic clay to the depth explored (~5.2 mbgl). The topsoil was black, frozen and grass covered at the time of the drilling program. The underlying sand encountered in boreholes BH6, BH7 and BH9 was fine grained, silty, medium dense, light brown and damp becoming wet with depth. The gravel was fine to coarse grained, sandy, dense, brown and wet. The glacial clay till encountered in boreholes BH6 and BH8 was silty, contained trace gravel, trace sand, was dark brown, oxidized, ranged from firm to stiff, high plasticity and moist. The clay encountered below the glacial clay till in borehole BH8 was sitly, brown, oxidized, firm to stiff, high plasticity and moist becoming wet with depth.

5.1.2 Groundwater Seepage and Sloughing Standpipe piezometers were not installed within any of the boreholes; however, the water level and sloughing conditions were measured/noted prior to the backfilling of each borehole. Water seepage and levels ranged from 2.1 to 4.3 mbgl within 10 minutes after the completion of borehole drilling while sloughing ranged from 2.4 m to 3.7 mbgl.

5.2 Geotechnical Recommendations

5.2.1 Existing Clay Liner Five boreholes were drilled within the clay liner of the existing sewage lagoon cells. Shelby tube samples were obtained at all five borehole locations. The location of the boreholes is shown in Figure 1, Appendix I. The boreholes were located along the interior edge of the dykes. Given that both cells were filled at the time of the investigation, no samples were obtained from the bottom of the lagoon. A photograph of each of the extruded samples is shown in Appendix IV. Manitoba Conservation’s Environmental guidelines require that the proposed dykes and bottom of the proposed cells be provided with a layer consisting of at least one meter of soil having a permeability of less than 1x10-7 cm/s. A hydraulic conductivity test was completed on the sample obtained from borehole BH2. The results of the hydraulic conductivity test indicated an in-situ hydraulic conductivity of 7.19 x 10-8 cm/s. Based on the information gathered through SNC-Lavalin’s geotechnical investigation, the existing clay liner within the proposed lagoon consists of clay with a hydraulic conductivity that meets the guidelines provided by Manitoba Conservation.

5.2.2 Proposed Sewage Lagoon Addition Footprint Four (4) boreholes were drilled within the proposed sewage lagoon footprint addition to assess the hydraulic conductivity of the in-situ soils and ground water elevation. Sand and gravels having a hydraulic conductivity of greater than 1x10-7 cm/s were encountered in all of the boreholes with the exception of borehole BH8. The ground water table ranged from 2.1 to 4.3 mbgl.

APPENDIX I

Borehole Location Plan

HWY 24 N N

SASKATCHEWAN AVE.

RAPID CITY RAPID CITY

HWY 270

WASTE WATER LAGOON

LOCATION PLAN SCALE: 1:40,000 648290-02 648290-03

648290-04

648290-08 648290-07

648290-01 648290-05 648290-06 648290-09

WASTE WATER LAGOON SCALE: 1:2,500

0 25 50 75 100 m LEGEND NOTES REVISIONS 1:2,500 1. PHOTOGRAPHY FROM GOOGLE EARTH AUGUST, 2015. 0 0.5 1 1.5 2 km 2. COORDINATES NAD 83 ZONE 14. 1:40,000 3. SURVEY DONE BY HANDHELD GPS. CLIENT PROJECT LOCATION 0 - - -- MANITOBA WATER RAPID CITY, MANITOBA REV DATE DESCRIPTION DRN APP SERVICES BOARD WASTE WATER LAGOON

REFERENCE DRAWINGS TITLE WASTE WATER LAGOON SITE PLAN

- - DES BY JP DRN BY PB DATE 2017 12 14 FIG No 1 REV 0 DWG No DESCRIPTION CHK BY JP APP BY DWG No 648000-4GDD-100 11X17 P:\Manitoba Water Services Board\648290 Rapid City Waste Lagoon\45_GIS_Dwgs\4.5.2 CAD\4.5.2.1 DRAWINGS\648290-0000-4GDD-100.dwg APPENDIX II

Borehole Logs

APPENDIX III

Laboratory Test Results

TRIAXIAL HYDRAULIC CONDUCTIVITY TEST REPORT Test reference: ASTM D 5084

CLIENT: Town of Rapid City PROJECT: Rapid City Waste Water System PROJECT No: 648290 DATE: 15-Dec-17

SAMPLE: BH-2 1-3 feet Shelby specimen Ver 7 - 2016/04/19

Testing Summary: Cell pressure = 230 kPa Final Water Content = 17.2% Average back pressure = 200 kPa Final Dry Density = 1817 kg/m3 Head across specimen = 67 cm Final deg of saturation = 99% Hydraulic gradient = 19.4 Initial sample diameter = 72.34 mm Inflow rate = 0.00335 cc/min Initial sample height = 34.47 mm Outflow rate = 0.00354 cc/min Initial Water Content = 16.4% Average flow rate = 0.00345 cc/min Initial Dry Density = 1822 kg/m3 Initial Deg of saturation = 96% Hydraulic Conductivity (based on average flow rate): Permeant: de-aired tap-water k = 7.19E-08 cm/s Comments:

25.0

20.0

15.0

10.0

Cumulative flow flow Cumulative volume, cc 5.0 Inflow

Outflow 0.0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 Time (minutes)

The testing services reported here have been performed in accordance with accepted local industry standards. The results presented are for the sole use of the designated client only. This report constitutes a testing service only. It does not represent any interpretation or opinion regarding specification compliance or material suitability. Engineering interpretation will be provided by SNC-Lavalin upon request.

APPENDIX IV

Photographs

Appendix D

Application for Wastewater Treatment Facility Classification

Water & Wastewater Facility Operators Certification Program Application for Wastewater Treatment Facility Classification

Please print clearly or type and follow the instructions on the application form. NOTE: If using Adobe Reader text can be inserted into form and tab between fields.

This application is pursuant to the Water and Wastewater Facility Operators Regulation issued under The Environment Act.

Name of Facility:

Name of Facility Owner: (Municipality/Commission/ Company/Individual/etc) Civic Address of Facility:

Mailing Address of Owner:

Postal Code: Telephone:

Contact Person: Position:

Cell or Pager: Fax: Email:

Please complete the following. The information provided will be used to classify the wastewater treatment facility under the Water and Wastewater Facility Operators Regulation. In some cases actual numbers or answers must be supplied, but in most cases it will only be necessary to check the appropriate criteria.

Forward the completed form by email to: Please direct questions to: [email protected] Certification Program Specialist Email: [email protected] Or mail it to: Phone: (204) 945-7065 Director Environmental Approvals Branch Manitoba Sustainable Development 1007 Century Street Winnipeg MB R3H 0W4

Application for Wastewater Treatment Facility Classification Page 1 of 6 Revised July 2018 Application for Wastewater Treatment Facility Classification

SYSTEM (choose all that apply)

New or proposed Facility seeking classification

Proposed start of operations (month / year) 1. Existing Facility seeking classification (in operation prior to December 31, 2005)

Facility has been in operation since (approximate month/year)

The facility WILL employ mechanical treatment processes 2. The facility WILL NOT employ mechanical treatment processes

SIZE (refer to Supplemental Information for point designation) (2 point minimum to 20 point maximum)

1. Maximum population or part served, peak day # 1-10 m3/day Design flow average day Estimated or Actual gal/day (Circle volume option & units) 2. ______1-10 OR 3 Peak month’s flow average day Estimated or Actual m /day gal/day

VARIATION IN RAW WASTE1 (choose all that apply) (0 point minimum to 6 point maximum)

1. Variations do not exceed those normally or typically expected 0

Recurring deviations or excessive variations of 100-200% in strength

2. Recurring deviations or excessive variations of 100-200% in flow 2

Recurring deviations or excessive variations of 100-200% in strength and flow

Recurring deviations or excessive variations of more than 200% in strength

3. Recurring deviations or excessive variations of more than 200% in flow 4

Recurring deviations or excessive variations of more than 200% in strength and flow

4. Raw wastes subject to toxic waste discharges 6

Septage or truck-hauled waste discharge is accepted at the facility. 5. 0 - 4 Estimated number of loads per day in peak haul times

Application for Wastewater Treatment Facility Classification Page 2 of 6 Revised July 2018 Application for Wastewater Treatment Facility Classification

PRELIMINARY TREATMENT (choose all that apply)

1. Facility pumping of main flow 3

2. Screening or Comminution 3

3. Grit removal 3

4. Equalization 1

PRIMARY TREATMENT (choose all that apply)

1. Clarifiers 5

2. Anaerobic treatment with biogas flare 10

3. Anaerobic treatment with biogas utilization facility 15

SECONDARY TREATMENT (choose all that apply)

1. Fixed-film reactor 10

2. Activated sludge 15

3. Stabilization ponds without aeration(i.e. sewage lagoon) 5

4. Stabilization ponds with aeration 8

TERTIARY TREATMENT (choose all that apply)

1. Polishing ponds for advanced waste treatment 2

2. Chemical / physical advanced waste treatment without secondary treatment 15

3. Chemical / physical advanced waste treatment following secondary treatment 10

4. Biological or chemical / biological advanced waste treatment 12

5. Nitrification by designed extended aeration only 5

6. Ion exchange for advanced waste treatment 10

7. Reverse osmosis, electrodialysis and other membrane filtration techniques 10

8. Advanced waste treatment chemical recovery, carbon regeneration 4

Application for Wastewater Treatment Facility Classification Page 3 of 6 Revised July 2018 Application for Wastewater Treatment Facility Classification

9. Media filtration 5

ADDITIONAL TREATMENT PROCESSES (choose all that apply) Chemical addition: (Please list chemicals used, 2 pts per chemical to max. of 6) 1. 0 - 6 Chemicals

2. Dissolved air floatation (other than for sludge thickening) 8

3. Intermittent sand filter 2

4. Recirculating intermittent sand filter 3

5. Microscreens 5

6. Generation of oxygen 5

SOLIDS HANDLING (choose all that apply)

1. Storage (other than for stabilization) 2

2. Stabilization by storage (including any storage afterwards) 4

3. Gravity thickening 2

4. Mechanical dewatering 8

5. Anaerobic digestion of solids 10

6. Utilization of digester gas for heating or cogeneration 5

7. Aerobic digestion of solids 6

8. Air-drying of sludge 2

9. Solids reduction (including incineration and wet oxidation) 12

10. Disposal in landfill 2

11. Solids composting 10

12. Land application of biosolids by contractor 2

13. Land application of biosolids by facility personnel 10

Application for Wastewater Treatment Facility Classification Page 4 of 6 Revised July 2018 Application for Wastewater Treatment Facility Classification

DISINFECTION (choose all that apply) (0 point minimum to 10 point maximum)

Chlorination 1. 5 Ultraviolet irradiation

2. Ozonization 10

EFFLUENT DISCHARGE (choose all that apply) (0 point minimum to 10 point maximum)

1. Discharge to surface water (ditch or lake or ______) 0

2. Mechanical post-aeration 2

3. Direct recycling and reuse 6

4. Land treatment and surface or subsurface disposal 4

INSTRUMENTATION (choose one) (0 point minimum to 6 point maximum)

1. SCADA or similar instrumentation systems are used to provide:

• Data with no process operation 0

• Data with limited process operation 2

• Data with moderate process operation 4

• Data with extensive or total process operation 6

LABORATORY CONTROL2 (choose all that apply) (0 point minimum to 15 point maximum)

1. Bacteriological / Biological (0 point minimum to 5 point maximum)

• Lab work done outside the facility 0

• Membrane filter procedures 3

• Use of fermentation tubes or any dilution method of fecal coliform 5 determination

2. Chemical / Physical (0 point minimum to 10 point maximum)

• Lab work done outside the facility 0

Application for Wastewater Treatment Facility Classification Page 5 of 6 Revised July 2018 Application for Wastewater Treatment Facility Classification

• Push button or visual methods for simple tests such as pH or settleable solids (List tests) 3

• Additional procedures such as DO, COD, BOD, gas analysis, titration, solids content or volatile content (List tests) 5

• More advanced determinations such as specific constituents, nutrients, total oils or phenols (List tests) 7

• Highly sophisticated instrumentation such as atomic absorption or gas chromatograph (List tests) 10

APPLICANT VERIFICATION

I HEREBY DECLARE THAT ALL INFORMATION IN THIS APPLICATION IS TRUE.

Name of Applicant3: (Print)

Title:

Telephone: Fax:

Email:

Signature of Authorized Date: Representative:

1The key concepts are frequency or intensity of deviation, or excessive variation from normal or typical fluctuations. The deviations in strength, toxicity, ratio of infiltration to inflow, or shock loads.

2 The key concept is to credit laboratory analyses done on-site by facility personnel under the direction of an operator-in-charge with points from 0-15.

3 Applicant must be an authorized representative of the owner/operating authority (i.e. manager, P. Eng., or overall responsible operator).

Application for Wastewater Treatment Facility Classification Page 6 of 6 Revised July 2018 Water & Wastewater Facility Operators Certification Program

Wastewater Treatment Form Supplemental Information

This is supplemental information for completing the Application for Wastewater Treatment Facility Classification Form only.

For exact definitions and text refer to Manitoba Regulation 77/2003, Water and Wastewater Facility Operators Regulation under The Environment Act (C.C.S.M. c E125).

A copy of the regulation is available by following the link for Manitoba Regulations at: http://www.gov.mb.ca/conservation/envapprovals/publs/index.html

Facilities are classified as follows:

Small system class A wastewater treatment facility that otherwise meets the criteria of a class 1 wastewater treatment facility shall be classified in the small system class if a) it treats wastewater from a population of no more than 500; and b) no mechanical treatment processes are employed at the facility.

Classes 1 to 4 Wastewater treatment facilities shall be classified in classes 1 to 4 in accordance with the following table, on the basis of the number of classification points assessed under the classification point system set out in the Water and Wastewater Facility Operators Regulation.

Range of Classification Points Classification

0 to 30 Class 1 31 to 55 Class 2 56 to 75 Class 3 76 or more Class 4

Size Points for size: (2 point minimum to 20 point maximum) Maximum population or part served, peak day (1 point minimum to 10 point maximum). Points are assigned at 1 point per 10,000 population or part. Design flow average day or peak month’s flow average day, whichever is larger (1 point minimum to 10 point maximum). Points are assigned at 1 point per 4.5 megalitres per day or part.

Authorized Representative Signatures for the Applicant Verification section must be an individual recognized by the Owner of the facility as able to sign official documentation (i.e. P.Eng., Manager, CAO, etc).

Revised July 2018 Page 1 of 1

Appendix E

Correspondence

Manitoba Conservation Data Centre (MBCDC, Colin Murray), 21 May 2019, Email

Historic Resources Branch (HRB, Suyoko Tsukamoto), 24 June 2019, Email

MacBride, Lyndsey

From: Murray, Colin (SD) Sent: May 21, 2019 3:53 PM To: MacBride, Lyndsey Subject: Data request L MacBride SNC Lavalin 20190507 Rapid City Lagoon Expansion

Hi Lyndsey Thank you for your information request. I completed a search of the Manitoba Conservation Data Centre's (CDC) rare species database for your area of interest. This includes the primary location located on NW‐20‐013‐019W1; and a two kilometer radius buffer from the site.

The search resulted in the following occurrences:

Within the footprint or primary location(s): No listed or tracked species occurrences at this time.

Within 2km of the footprint boundary: No listed or tracked species occurrences at this time.

General area records low locational accuracy: NA

Found in broader area and similar habitat: NA

Further information on this ranking system can be found on our website at: http://www.natureserve.org/conservation‐ tools/conservation‐status‐assessment. These designations can be found at: http://web2.gov.mb.ca/laws/statutes/ccsm/e111e.php, https://www.canada.ca/en/environment‐climate‐change/services/committee‐status‐endangered‐wildlife.html and http://www.sararegistry.gc.ca/default.asp?lang=En&n=24F7211B‐1.

Manitoba’s recommended setback distances can be found at: https://www.gov.mb.ca/sd/pubs/conservation‐data‐ centre/mbcdc_bird_setbacks.pdf.

The information provided in this letter is based on existing data known to the Manitoba CDC of the Wildlife and Fisheries Branch at the time of the request. These data are dependent on the research and observations of CDC staff and others who have shared their data, and reflect our current state of knowledge. An absence of data does not confirm the absence of any rare or endangered species. Many areas of the province have never been thoroughly surveyed, however, and the absence of data in any particular geographic area does not necessarily mean that species or ecological communities of concern are not present. The information should, therefore, not be regarded as a final statement on the occurrence of any species of concern nor should it substitute for on‐site surveys for species or environmental assessments. Also, because our Biotics database is continually updated and because information requests are evaluated by type of action, any given response is only appropriate for its respective request.

Please contact the Manitoba CDC for an update on this natural heritage information if more than six months passes before it is utilised.

Third party requests for products wholly or partially derived from the Biotics database must be approved by the Manitoba CDC before information is released. Once approved, the primary user will identify the Manitoba CDC as data

1 contributors on any map or publication using data from our database, as the Manitoba Conservation Data Centre; Wildlife and Fisheries Branch, Manitoba Sustainable Development.

This letter is for information purposes only ‐ it does not constitute consent or approval of the proposed project or activity, nor does it negate the need for any permits or approvals required by the Province of Manitoba.

We would be interested in receiving a copy of the results of any field surveys that you may undertake, to update our database with the most current knowledge of the area.

If you have any questions or require further information contact me directly at (204) 945‐7760.

Colin

Reference screen clip:

From: MacBride, Lyndsey Sent: May‐08‐19 3:03 PM To: Murray, Colin (SD) Cc: Zurzolo, Francesco ; Bean, Roger Subject: Request for a Conservation Data Centre screening

Hi,

I am following up to my online request for a Conservation Data Centre screening for a proposed wastewater lagoon expansion in Rapid City, Manitoba, to support the Environment Act Proposal for the expansion. SNC‐Lavalin is preparing the EAP on behalf of the RM of Oakview. The lagoon services the community of approximately 440 people and does not have a valid operating licence; upgrades are required to bring the lagoon into compliance with current standards. The lagoon discharges into the Little Saskatchewan River. I have attached a map of the proposed expansion and the UTM coordinates (Zone 14N) of the corners of the expansion:

Easting Northing Corner 424970.5 5552114.8 NE 425109.9 5552122.5 NW 425109.1 5552064.4 SE‐E 425051.2 5552024.5 SE‐S 424968.2 5552026.3 SW

Much appreciated,

Lyndsey MacBride, M.Sc., P.Geo. Operations Manager, Impact Assessment & Community Engagement, SK & MB Environment & Geoscience Infrastructure Tel.: 204‐786‐8080 x 294 Cell.: 204‐479‐1468 Fax: 204‐786‐7934 SNC‐Lavalin 148 Nature Park Way Winnipeg | Manitoba | Canada | R3P 0X7

snclavalin.com

NOTICE ‐ This email message and any attachments may contain information or material that is confidential, privileged, and/or subject to copyright or other rights. Any unauthorized viewing, disclosure, retransmission, dissemination, or other use of or reliance on this message or anything contained therein is strictly prohibited and may be unlawful. If you believe you may have received

4 this message in error, kindly inform the sender by return email and delete this message from your system. Thank you.

DATE: 2019-06-24

TO: Lyndsey MacBRIDE FROM: Suyoko TSUKAMOTO Operations Manager Impact Assessment Archaeologist SNC-Lavalin Historic Resources Branch 148 Nature Park Way Main Floor – 213 Notre Dame Avenue Winnipeg, MB Winnipeg, Manitoba R3P 0X7 R3B 1N3

CC: Perry BLOMQUIST PHONE NO: (204) 945-3893 Impact Assessment Archaeologist FAX: (204) 948-2384 Historic Resources Branch E-MAIL: [email protected]

SUBJECT: Heritage Screening: Rapid City Wastewater Lagoon Expansion AAS File No. AAS-19-14547

No concerns at this time.

Further to your request for the above noted heritage screening, the Historic Resources Branch has examined the location in conjunction with Branch records for areas of potential concern. Because the proposed developmental footprint appears to be within a previously disturbed right of way south of the existing lagoons, the potential to impact significant heritage resources is considered low and, therefore, the Historic Resources Branch has no immediate concerns with the proposed development. Please be advised that should development be proposed north of the lagoons in Block 37 or to the west in Lot 1, then a heritage resource impact assessment will be requested.

If at any time, however, heritage resources are encountered in association with these lands during testing and development, the Historic Resources Branch may require that an acceptable heritage resource management strategy be implemented by the developer to mitigate the effects of development on the heritage resources.

If you have any questions or comments, please feel free to contact the Branch as above.

Historic Resources Branch Archaeological Assessment Services Unit

Appendix F

List of Species in the Aspen Parkland Ecoregion

Table F.1 Subnational (S) conservation status ranks (MBCDC 2019)

Table F.2 List of plant and animal species in the Aspen Parkland Ecoregion (MBCDC 2019)

Table F.1 Subnational (S) conservation status ranks (MBCDC 2019) Rank Definition SX Presumed Species or ecosystem is believed to be extirpated from the jurisdiction (i.e., nation, extirpated or state/province). Not located despite intensive searches of historical sites and other appropriate habitat, and virtually no likelihood that it will be rediscovered. [equivalent to “Regionally Extinct” in IUCN Red List terminology].

SH Possibly Known from only historical records but still some hope of rediscovery. There is extirpated evidence that the species or ecosystem may no longer be present in the jurisdiction, but not enough to state this with certainty. Examples of such evidence include (1) that a species has not been documented in approximately 20-40 years despite some searching and/or some evidence of significant habitat loss or degradation; (2) that a species or ecosystem has been searched for unsuccessfully, but not thoroughly enough to presume that it is no longer present in the jurisdiction. S1 Critically At very high risk of extirpation in the jurisdiction due to very restricted range, very imperiled few populations or occurrences, very steep declines, severe threats, or other factors. S2 Imperiled At high risk of extirpation in the jurisdiction due to restricted range, few populations or occurrences, steep declines, severe threats, or other factors.

S3 Vulnerable At moderate risk of extirpation in the jurisdiction due to a fairly restricted range, relatively few populations or occurrences, recent and widespread declines, threats, or other factors. S4 Apparently At a fairly low risk of extirpation in the jurisdiction due to an extensive range and/or secure many populations or occurrences, but with possible cause for some concern as a result of local recent declines, threats, or other factors. S5 Secure At very low or no risk of extirpation in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats.

Table F.2 List of plant and animal species in the Aspen Parkland Ecoregion (MBCDC 2019) Category Scientific Name Common Name S Rank Amphibian Ambystoma mavortium western tiger salamander S4S5 Amphibian Ambystoma tigrinum eastern tiger salamander S2? Amphibian Anaxyrus cognatus great plains toad S2 Amphibian Lithobates pipiens northern leopard frog S4 Amphibian Spea bombifrons plains spadefoot toad S2S3 Animal Assemblage Snake Hibernaculum snake hibernaculum SNR Bird Aechmophorus occidentalis western grebe S4B Bird Ammodramus bairdii Baird's sparrow S1B Bird Ammodramus savannarum grasshopper sparrow S3B Bird Anthus spragueii Sprague's pipit S2B Bird Ardea alba great egret S2S3B Bird Ardea herodias great blue heron S5B Bird Asio flammeus short-eared owl S2S3B Bird Athene cunicularia burrowing owl S1B Bird Bubulcus ibis cattle egret S2B

Category Scientific Name Common Name S Rank Bird Buteo regalis ferruginous hawk S1B Bird Calamospiza melanocorys lark bunting S1B Bird Calcarius ornatus chestnut-collared longspur S2B Bird Cardellina canadensis Canada warbler S3B Bird Chaetura pelagica chimney swift S2B Bird Charadrius melodus piping plover S1B Bird Chlidonias niger black tern S4B Bird Chordeiles minor common nighthawk S3B Bird Contopus cooperi olive-sided flycatcher S3B Bird Contopus virens eastern wood-pewee S4B Bird Coturnicops noveboracensis yellow rail S3B Bird Cygnus buccinator trumpeter swan S1B Bird Dolichonyx oryzivorus bobolink S4B Bird Empidonax traillii willow flycatcher S3B Bird Eremophila alpestris horned lark S3B,SUM Bird Hirundo rustica barn swallow S4B Bird Ixobrychus exilis least bittern S2B Bird Lanius ludovicianus excubitorides loggerhead shrike S1B Bird Larus delawarensis ring-billed gull S5B Bird Melanerpes erythrocephalus red-headed woodpecker S3B Bird Nycticorax nycticorax black-crowned night-heron S4B Bird Phalacrocorax auritus double-crested cormorant S5B Bird Plegadis chihi white-faced Ibis S1B Bird Podiceps auritus horned grebe S4B Bird Podiceps nigricollis eared Grebe S4B Bird Riparia riparia bank swallow S5B Bird Sayornis saya Say's phoebe S3B Bird Sterna forsteri Forster's tern S4B Bird Vermivora chrysoptera golden-winged warbler S3B Insect Copablepharon grandis pale yellow dune moth S1 Insect Copablepharon longipenne dusky dune moth S1 Insect Danaus plexippus monarch S3S4B Insect Erynnis martialis mottled dusky wing S1 Insect Hesperia dacotae Dakota skipper S2 Insect Hesperia ottoe ottoe skipper S1 Insect Hypochlora alba sage grasshopper S3S5 Insect Schinia avemensis golden-edged gem S1 Insect Schinia bimatris white flower moth S1 Insect Schinia verna Verna's Flower moth S1 Insect Strymon melinus gray hairstreak S2 Lichen Teloschistes chrysophthalmus golden-eye lichen S3S4 Mammal Mustela frenata long-tailed weasel S3 Mammal Odocoileus hemionus mule or black-tailed deer S3 Mussel Fusconaia flava Wabash pigtoe S3 Mussel Lasmigona complanata white heelsplitter S3

Category Scientific Name Common Name S Rank Mussel Lasmigona compressa creek heelsplitter S2 Mussel Quadrula quadrula mapleleaf mussel S1 Plant Achnatherum hymenoides Indian rice grass S2 Plant Achnatherum richardsonii Richardson needle grass S1S2 Plant Acmispon americanus prairie trefoil S2S3 Plant Agalinis aspera rough agalinis S2 Plant Alisma gramineum narrow-leaved water-plantain S1 Plant Ambrosia acanthicarpa sandbur S1 Plant Andropogon hallii sand bluestem S2 Plant Aristida purpurea var. longiseta red three-awn S1? Plant Arnica fulgens shining arnica S2 Plant Artemisia cana ssp. cana silver sagebrush S1 Plant Asclepias lanuginosa hairy milkweed S2S3 Plant Asclepias verticillata whorled milkweed S3 Plant Asclepias viridiflora green milkweed S3 Plant Astragalus gilviflorus cushion milkvetch S1 Plant Astragalus pectinatus narrow-leaved milkvetch S2 Plant Atriplex argentea var. argentea silver saltbush S2 Plant Boltonia asteroides var. recognita white boltonia S2S3 Plant Botrychium campestre prairie moonwort S1 Plant Bouteloua curtipendula side-oats grama S2 Plant Bouteloua dactyloides buffalograss S1 Plant Bromus kalmii wild chess S2S3 Plant Bromus porteri porter's chess S2S3 Plant Calamagrostis montanensis plains reed grass S3 Plant Callitriche heterophylla larger water-starwort S1? Plant Carex cristatella crested sedge S1? Plant Carex cryptolepis northeastern sedge S1 Plant Carex emoryi Emory's sedge S2? Plant Carex gravida heavy sedge S1 Plant Carex hallii Hall's sedge S1S2 Plant Carex hystericina porcupine sedge S3 Plant Carex parryana Parry's sedge S3 Plant Carex pedunculata stalked sedge S3 Plant Carex sterilis dioecious sedge S2 Plant Carex supina ssp. spaniocarpa weak sedge S2S3 Plant Carex tetanica rigid sedge S3 Plant Carex xerantica white-scaled sedge S2 Plant Celtis occidentalis hackberry S1? Plant Chenopodium subglabrum smooth goosefoot S1 Plant Circaea canadensis ssp. canadensis large enchanter's-nightshade S2 Plant Clematis ligusticifolia western Virgin's-bower S1 Plant Clematis virginiana Virgin's-bower S2? Plant Coreopsis tinctoria common tickseed S1 Plant Corispermum americanum var. americanum American bugseed S3

Category Scientific Name Common Name S Rank Plant Corispermum hookeri var. hookeri hooker's bugseed S1 Plant Corispermum pallasii Pallas' bugseed SH Plant Corispermum villosum hairy bugseed S1S2 Plant Cornus alternifolia alternate-leaved dogwood S3 Plant Coryphantha vivipara pincushion cactus S1? Plant Cryptotaenia canadensis Canadian honewort S1 Plant Cycloloma atriplicifolium winged pigseed S2S3 Plant Cymopterus glomeratus plains cymopterus S2S3 Plant Cyperus houghtonii Houghton's umbrella-sedge S2S3 Plant Cyperus schweinitzii Schweinitz's flatsedge S2 Plant Cypripedium candidum small white lady's-slipper S1 Plant Dalea villosa var. villosa hairy prairie-clover S2S3 Plant Desmodium canadense beggar's-lice S2 Plant Dichanthelium linearifolium white-haired panic-grass S2? Plant Dichanthelium wilcoxianum sand millet S2? Plant Eleocharis engelmannii Engelmann's spike-rush S1S2 Plant Elymus hystrix bottle-brush grass S2 Plant Eragrostis hypnoides creeping teal love grass S3 Plant Erigeron caespitosus tufted fleabane S1 Plant Eriogonum flavum yellow eriogonum S2S3 Plant Erythranthe geyeri smooth monkeyflower S1 Plant Euphorbia geyeri prostrate spurge S2 Plant Festuca hallii plains rough fescue S3 Plant Festuca subverticillata nodding fescue S1 Plant Galium aparine cleavers S3 Plant Helianthus nuttallii ssp. rydbergii tuberous-rooted sunflower S2 Plant Heliotropium curassavicum seaside heliotrope SH Plant Juncus interior inland rush S1 Plant Krascheninnikovia lanata winterfat S1? Plant Leersia oryzoides rice cutgrass S3 Plant Lemna turionifera turion duckweed S1 Plant Linum sulcatum grooved yellow flax S3 Plant Lomatium foeniculaceum hairy-fruited parsley S3 Plant Lomatium macrocarpum long-fruited parsley S2S3 Plant Lomatium orientale white-flowered parsley S1S2 Plant Lomatogonium rotatum marsh felwort S2S3 Plant Malaxis monophyllos white adder's-mouth S2? Plant Malaxis paludosa bog adder's-mouth S1? Plant Menispermum canadense Canada moonseed S3 Plant Mentzelia decapetala gumbo-lily SH Plant Mertensia lanceolata tall lungwort S2 Plant Musineon divaricatum leafy musineon S1S2 Plant Myosurus minimus least mousetail S1? Plant Orobanche ludoviciana Louisiana broom-rape S2 Plant Osmorhiza claytonii hairy sweet cicely S2?

Category Scientific Name Common Name S Rank Plant Ostrya virginiana hop-hornbeam S2 Plant Oxytropis sericea early yellow locoweed S1 Plant Penstemon nitidus smooth blue beard-tongue S2 Plant Penstemon procerus slender beard-tongue S1S2 Plant Phlox hoodii moss pink S3 Plant Phryma leptostachya lopseed S3 Plant Piptatheropsis micrantha little-seed rice grass S2 Plant Plagiobothrys scouleri var. scouleri Scouler's popcornflower S1 Plant Plantago elongata ssp. elongata linear leaved-plantain S2 Plant Poa cusickii mutton-grass S2 Plant Poa fendleriana mutton grass S2 Plant Polanisia dodecandra ssp. dodecandra clammyweed S1 Plant Polanisia dodecandra ssp. trachysperma clammyweed S1 Plant Polygala verticillata whorled milkwort S2 Plant Polygala verticillata var. isocycla whorled milkwort S2 Plant Potamogeton amplifolius large-leaved pondweed S3 Plant Potamogeton illinoensis Illinois pondweed S1? Plant Potentilla gracilis var. flabelliformis graceful cinquefoil S1 Plant Potentilla plattensis Platte River cinquefoil S2 Plant Rhynchospora alba white beakrush S3 Plant Rhynchospora capillacea horned beakrush S2S3 Plant Sanguinaria canadensis blood-root S2 Plant Sceptridium multifidum leathery grape-fern S3 Plant Schedonnardus paniculatus tumble-grass S2 Plant Selaginella densa prairie spike-moss S3 Plant Shinnersoseris rostrata annual skeletonweed S1S2 Plant Sisyrinchium campestre white-eyed grass S3 Plant Sisyrinchium mucronatum Michaux's blue-eyed grass S1 Plant Sporobolus neglectus annual dropseed S2S3 Plant Thermopsis rhombifolia golden bean S2S3 Plant Townsendia exscapa silky townsend-daisy S2 Plant Tradescantia occidentalis western spiderwort S1 Plant Uvularia sessilifolia small bellwort S2 Plant Verbena bracteata bracted vervain S3 Reptile Chelydra serpentina snapping turtle S3 Reptile Heterodon nasicus western hognose snake S1S2 Reptile Plestiodon septentrionalis northern prairie skink S1 Reptile Thamnophis radix western plains garter snake S4 Reptile Thamnophis sirtalis parietalis red-sided garter Snake S4

148 Nature Park Way Winnipeg, Manitoba, Canada R3P 0X7 204.475.4133 www.snclavalin.com