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Home My WebLink About21050_SSaunders St_BAWPRev 1_20191114Via Email November 14, 2019 North Carolina Department of Environmental Quality Division of Waste Management — Brownfields Program 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Attn: Mr. Kelly Johnson Re: Brownfields Assessment Work Plan South Saunders Street Assemblage South Saunders Street Raleigh, Wake County, North Carolina Brownfields Project No. 21050-17-092 H&H Job No. MRG-003 Dear Kelly: 1.0 Introduction hart '� hickman SMARTER ENVIRONMENTAL SOLUTIONS On behalf of Merge Capital, LLC (Prospective Developer or PD), Hart & Hickman, PC (H&H) has prepared this Work Plan to conduct Brownfields assessment activities for the Brownfields property located on South Saunders Street in Raleigh, Wake County, North Carolina (subject Site or Site). The subject Site consists of 20 contiguous parcels totaling approximately 9.15 acres of land located in a mixed light industrial and commercial area of Raleigh. A Site location map is provided as Figure 1 and a Site map is included as Figure 2. A list of the parcels that encompass the Brownfields property is included below. • 0 South Saunders Street (Wake County Parcel Identification No. [PIN] 1703442235) • 927 South Saunders Street (PIN 1703453051) • 951 South Saunders Street (PIN 1703444797) • 1001 South Saunders Street (PIN 1703442776) • 1015 South Saunders Street (PIN 1703442683) 2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301 Charlotte, NC 28203 Raleigh, INC 27607 www.harthickman.com 704.586.0007 main 919.847.4241 main Mr. Kelly Johnson November 14, 2019 Page 2 • 1017 South Saunders Street (PIN 1703442592) • 1019 South Saunders Street (PIN 1703443412) • 1021 South Saunders Street (PIN 1703442374) • 1021B South Saunders Street (PIN 1703442339) • 1023 South Saunders Street (PIN 1703443208) • 1025 South Saunders Street (PIN 1703444351) • 1027 South Saunders Street (PIN 1703444451) • 1029 South Saunders Street (PIN 1703443344) • 1031 South Saunders Street (PIN 1703444149) • 1033 South Saunders Street (PIN 1703443285) • 1035 South Saunders Street (PIN 1703442220) • 1041 South Saunders Street (PIN 1703442069) • 0 South Dawson Street (PIN 1703446541) • 0 Green Street (PIN 1703443170) • 1019 Mount Hope Drive (PIN 1703444408) The Site received eligibility into the North Carolina Department of Environmental Quality (DEQ) Brownfields Program via a Letter of Eligibility dated February 15, 2018. On October 30, 2018, H&H and the PD attended a meeting with DEQ Brownfields personnel to discuss Site history, areas of potential environmental concern, proposed redevelopment plans, potential data gaps, and the scope of Brownfields assessment activities needed to address the data gaps. Based on conversations during the October 2018 meeting, H&H proposed to conduct two phases of assessment to evaluate environmental conditions for potential impacts in areas of concern identified during previous Phase I Environmental Site Assessment (ESA) activities. The first phase assessment Work Plan was approved by DEQ Brownfields in an email dated November 29, 2018. First phase field activities were conducted in December 2018 and consisted of soil gas and limited groundwater assessment activities at the 927, 1001, and 1015 South Saunders Street properties. Due to access restrictions at the time of the field activities, soil gas 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 3 samples were not collected at the 927 South Saunders Street property. However, note that H&H proposes to collect these samples during phase two assessment. The results of the first phase assessment activities were summarized in an H&H email dated January 1, 2019 and will be documented with second phase assessment activities proposed in this Work Plan. Second phase assessment activities will consist of soil gas assessment at the 927 South Saunders Street property, soil assessment at the 1021B, 1031, and 1041 South Saunders Street properties, and soil and groundwater assessment at the 927, 1001, 1015, and 1017 South Saunders Street properties. In addition, H&H proposes to conduct surface water and sediment assessment at on - Site portions of Rocky Branch Creek. A brief summary of previous Phase I ESA activities conducted for the Site properties is included in Section 2.0 and proposed Brownfields assessment activities are included in Section 3.0. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 4 2.0 Background Parcels that make up the Brownfield property have historically consisted of commercial, agricultural, residential, or vacant land. By the late 1940s, commercial development had begun along South Saunders Street with general land uses at the Site consisting of a foundry, a concrete contractor, a vehicle dealership, a towing company, a fuel station, automotive repair stations, metal fabrication workshops, various retail businesses, and residential structures. Historical uses surrounding the subject Site have included metal fabrication, fuel stations, automotive service stations, and dry-cleaning. In the mid-2000s, Gateway Park Apartment Complex was developed to the northeast of the Site across Rocky Branch Creek. Rocky Branch Creek is designated by the DEQ Division of Water Resources as a Class C surface water body and flanks the Brownfields property on the eastern parcel boundaries. H&H reviewed available resources to obtain information regarding the historical uses of the Site properties and identify areas of potential environmental concern for Brownfields assessment. A brief summary of areas of potential environmental concern is provided in the following sections. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 5 2.1 Areas of Potential Concern Since 2007, multiple Phase I ESA's have been conducted at various parcels associated with the subject Site. The Phase I ESAs were completed by Mineral Springs Environmental, PC in June 2007, Highlands Environmental Solutions, Inc. (HES) in January 2015, and H&H in April and July 2017, and January 2018. Potential environmental concerns identified in connection with historical or current uses of the Brownfields property during Phase I ESA activities are summarized below. 927 South Saunders Street The 927 South Saunders Street property is comprised of one parcel totaling 0.91-acres in size. The parcel is developed with an approximately 4,000 square foot (sq ft) building that was previously occupied by Wheels 4 Hope (up until approximately April 2019), a non-profit automotive dealership. The former Wheels 4 Hope facility contained office and automotive service garage areas. The remaining areas of the property are either gravel or grassed parking areas, landscaped areas, or wooded areas. The property is currently vacant. Historically, the eastern portion of the 927 South Saunders Street property was developed with a small structure identified in a 1938 aerial photograph. From 1941 to 1947, Carolina Foundry occupied the property and in 1953, the existing structure was razed and a commercial structure was constructed in the central portion of the property. From 1953 until the early 1990s, R.B. Stokes Concrete Contractors and R.B.'s Chicken Restaurant occupied the property and reportedly used a portion of the building for maintenance. From the mid-1990s until present, the property has been occupied by various automotive service and sales facilities. Potential environmental concerns identified in the January 2018 Phase I ESA are summarized below. • One 2,000-gallon gasoline underground storage tank (UST) was installed in 1956 and is identified as temporarily closed. A release incident was reported for the Site in May 1993 when groundwater contamination was discovered during an environmental audit conducted by the City of Raleigh for construction of Western Boulevard. Soil and 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 6 groundwater samples collected in 1993 and 1994 indicated petroleum constituents exceeded the applicable regulatory standards. The highest contaminant concentrations were encountered in the vicinity of the UST and it appears likely that the impacts are the result of a release from the UST. During the Phase I ESA Site visit, two monitoring wells were observed on the west side of the property building, presumably from the previous UST investigation. The open UST release incident, documented soil and groundwater contamination above applicable regulatory standards, and the out of service UST are considered to be a potential environmental concern. • 927 South Saunders Street was occupied by a concrete contractor from 1953 until the early 1990s. Portions of the Site building were used by the concrete contractor as a maintenance area. The parcel was also occupied by various automotive service tenants from the mid-1990s until approximately April 2019. Over this time period, various automotive maintenance supplies and petroleum products were stored and utilized at the Site. In addition, a total of three diesel and heating oil aboveground storage tanks (ASTs) located north and east of the Site building were in use at the Site. The concrete contractor also reportedly stored multiple 55-gallon drums containing unknown liquids east of the Site building. The various automotive tenants utilized a waste oil AST located north of the Site building and routinely handled various automotive fluids. The long-term historic use of the Site by a concrete contractor, including truck maintenance and various automotive service tenants on the property are considered a potential environmental concern. • A foundry reportedly operated at the 927 South Saunders Street property from 1941 until the late 1940s or early 1950s. The foundry was not identified in any regulatory databases. H&H was not able to obtain information concerning operations at the foundry. The material threat of a release of metals and potential hazardous substances in association with the past uses of the property as a foundry are considered a potential environmental concern. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 7 • Kwiklean Cleaners / Smith -Dixon Inc. (1004 S. Saunders Street) is located adjacent, southwest, and topographically cross-to-upgradient to the 927 South Saunders Street property. Historical records indicate that a dry-cleaning facility has been present at this location since 1969. The facility currently operates as a drop off location for laundry, however, regulatory records indicates dry-cleaning activities generating spent halogenated solvents were formerly conducted at this facility. No Resource Conservation and Recovery Act (RCRA) violations have been reported for the facility and the North Carolina Dry -Cleaning Solvent Cleanup Act (DSCA) program has not identified a release incident at this facility. However, no known soil or groundwater investigations have been conducted in association with this facility. The material threat of a release of potential hazardous substances due to the presence of long-term historical dry-cleaning activities and the potential for groundwater contamination migration to the Brownfields property is considered a potential environmental concern. 951 South Saunders Street The 951 South Saunders Street property is comprised of one parcel totaling 2.88-acres in size. The parcel is undeveloped land and was historically utilized for agricultural purposes based on historical aerial photographs. The property was most recently used as a community garden from approximately 2013 through 2015. Potential environmental concerns identified in the April 2017 Phase I ESA are summarized below. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 8 • Areas of stormwater runoff from the upgradient property at 1001 South Saunders Street are present in the northwestern and west -central portions of the property. In 2015, soil samples were collected from the two stormwater runoff areas and a former compost area in the northwestern portion of the property. The samples were analyzed for Total Petroleum Hydrocarbons (TPH) Gasoline Range Organics (GRO) and Diesel Range Organics (DRO). The results of the laboratory analyses indicated detections of DRO in each of the samples collected, including a DRO concentration of 800 milligrams per kilogram (mg/kg) (which is above the DEQ Action Limit for DRO of 100 mg/kg) in the soil sample collected from the stormwater runoff area in the northwestern portion of the property. The areas of stormwater runoff are considered to be a potential environmental concern. 1001 South Saunders Street The 1001 South Saunders Street property is comprised of one parcel totaling 0.2-acres in size. The parcel is developed with an approximately 2,000 sq ft building that is currently being used as a metal fabrication shop. Historically, the property has been utilized as an automotive repair shop, a machine shop, and a gas station. The property is currently used for miscellaneous storage. Potential environmental concerns identified in the April 2017 Phase I ESA are summarized below. • One 10,000-gallon diesel, one 7,500-gallon gasoline, two 4,000-gallon gasoline, and one 4,000-gallon kerosene USTs were identified on regulatory databases as being formerly used at the 1001 South Saunders Street property. A Leaking Underground Storage Tank (LUST) release incident was reported for the property in February 2006. Although information provided by the DEQ Raleigh Regional Office (RRO) indicated that a Limited Site Assessment (LSA) had been performed and a Comprehensive Site Assessment (CSA) had been requested, copies of the investigation documents were unavailable. Additionally, there is no documentation that the USTs have been removed from the site. The lack of closure documentation for the USTs and the presence of an 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 9 open release incident on the property with which regulatory requirements have not yet been met, the possible presence of USTs, and possible petroleum contamination are considered to be a potential environmental concern. 1015 South Saunders Street The 1015 South Saunders Street property is comprised of one parcel totaling 0.51-acres in size. The parcel is developed with an approximately 7,470 sq ft building that was most recently used as an automotive shop and towing service. Historically, the property was also utilized for metal fabrication and retail services. The property is currently occupied by Tactile, an architecture and design company that performs on -Site wood fabrication. Potential environmental concerns identified in the July 2017 Phase I ESA are summarized below. • The 1015 South Saunders Street property is listed in historical databases as having operated as an automotive service location as early as 1952. During the Phase I ESA Site visit, multiple areas of interior and exterior staining were observed in association with the storage and use of hazardous substances. The current and long-term historical automotive service operations at the property, observed poor housekeeping and poor non -hazardous and hazardous materials storage practices, and observed interior and exterior staining are considered a potential environmental concern. 1017 South Saunders Street The 1017 South Saunders Street property is comprised of one parcel totaling 0.37-acres in size. The parcel is developed with an approximately 1,570 sq ft building that was most recently used as an automotive shop and sales center. Historically, the property was utilized by a construction company and for transportation and retail services. The property is currently vacant. Potential environmental concerns identified in the July 2017 Phase I ESA are summarized below. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 10 • The 1017 South Saunders Street property is listed in historical databases as having operated as an automotive service location as early as 1952. During the Phase I ESA Site visit, multiple areas of interior and exterior staining were observed in association with the storage and use of hazardous substances. The current and long-term historical automotive service operations at the property, observed poor housekeeping and poor non -hazardous and hazardous materials storage practices, and observed interior and exterior staining are considered a potential environmental concern. 1021B South Saunders Street The 1021B South Saunders Street property is comprised of one parcel totaling 0.16-acres in size. The parcel was formerly developed with an automotive garage. Based upon information reviewed, it appears that the automotive garage supported the adjacent residence located at 1021 South Saunders Street. Potential environmental concerns identified in the June 2007 Phase I ESA are summarized below: 0 55-gallon drums and an area of spilled oil were observed on the parcel and are considered to be a potential environmental concern. 1031 and 1041 South Saunders Street The 1031 and 1041 South Saunders Street properties are comprised of two parcels totaling 0.33 and 0.57-acres in size, respectively. The parcels both consist of undeveloped wooded land. Phase I ESAs conducted on the two parcels have not identified the presence of RECs and/or additional environmental concerns. Therefore, H&H has proposed to conduct background soil sampling activities on these properties. The proposed supplemental Brownfields assessment activities are outlined in the following sections. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 11 3.0 Brownfields Assessment Activities H&H proposes to conduct soil, groundwater, surface water, and sediment assessment activities at the Brownfields property. In addition, H&H will also collect sub -slab soil gas samples at the 927 South Saunders Street property as part of first phase assessment activities proposed in the November 29, 2018 Work Plan. The assessments will be used to evaluate the potential for impacts associated with historical Site uses and to assist in development of an Environmental Management Plan (EMP) for use during planned redevelopment of the Site. The proposed assessment activities will be performed in general accordance with DEQ's Inactive Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup (Guidelines) dated October 2015 and most recent versions of the U.S. Environmental Protection Agency (EPA) Region IV Science and Ecosystem Support Division (SESD) Field Branches Quality System and Technical Procedures guidance. Prior to conducting field activities, H&H will contact North Carolina 811 One -Call, the public utility locator service, to mark subsurface utilities at the Site. H&H will also team with a private utility locator to identify and mark locations of sub -grade utilities at the Site that may not be marked by the public locator. In addition, prior to boring advancement, a hand auger will be advanced to a depth of approximately 5 ft below ground surface (bgs) at the proposed boring locations to further clear for potential subsurface utilities (unless conditions indicate the further advancement with a hand auger is warranted). In accordance with DEQ rules, H&H will obtain Monitoring Well Construction Permits from the DEQ Division of Water Resources prior to temporary monitoring well installation and sampling (if necessary). 3.1 Soil Sampling Activities H&H proposes to conduct soil assessment activities at the Site to evaluate potential impacts. H&H will team with a qualified drilling contractor to advance up to 22 soil borings to varying 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 12 depths across the Site. Proposed soil sample locations are depicted on the sample location maps, which are presented as Figure 3 through 5, and will be advanced in the following areas: Figure 33 • near the waste oil AST (927 South Saunders Street); • in the vicinity of the former AST, drum storage, and antifreeze tote storage areas (927 South Saunders Street); and • in the vicinity of the former aboveground hydraulic lift areas (927 South Saunders Street). Figure 4 • near the three areas of stormwater runoff (951 South Saunders Street); • in the vicinity of the potential UST system (1001 South Saunders Street); • near the used waste oil storage area (1001 South Saunders Street); • in the vicinity of the former aboveground hydraulic lifts, waste oil AST and tote, and parts washing station areas (1015 South Saunders Street); • in the drainage feature near stained soil (1015 South Saunders Street); and • near the waste oil storage drum and stained soil (1017 South Saunders Street). Fiugre5 • near the 55-gallon drum and stained soil (1021B South Saunders Street). For the soil borings proposed inside the Site buildings, H&H will utilize a concrete coring machine to penetrate the concrete floors to access soil underlying the buildings. The soil borings will be advanced via hand auger to a depth of up to approximately five (5) ft bgs. The proposed exterior soil borings will be advanced to the approximate groundwater table. For the interior borings, continuous soil samples will be collected from the borings using the hand auger bucket. The exterior soil borings will be advanced utilizing a track -mounted direct push technology (DPT) drill rig. Continuous soil samples will be collected from the borings using acetate lined macrocore sleeves. Soil samples will be logged for lithological description and field screened 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 13 for indication of potential impacts by observation for staining, and the presence of organic vapors using a calibrated photoionization detector (PID). Based upon field screening results, one soil sample will be collected from each soil boring for laboratory analysis from the depth interval interpreted most likely to be impacted. If there are no obvious indications of potential impact based on field screening results, then soil samples will be collected from 1-2 ft bgs. Soil samples will be collected directly from the macrocore sleeve and/or the decontaminated stainless -steel hand auger and transferred into laboratory supplied sample containers. The soil samples will be labeled with the sample identification, date, and requested analysis, and placed in a laboratory supplied cooler with ice. Soil samples will be submitted to a North Carolina certified laboratory under standard chain of custody protocols for analysis of volatile organic compounds (VOCs) by EPA Method 8260, semi-VOCs (SVOCs) by EPA Method 8270, and Resource Conservation and Recovery Act (RCRA) metals plus hexavalent chromium by EPA Methods 6020/7471/7199. H&H will also collect two (2) background soil samples from the 1031 and 1041 South Saunders Street properties (one sample from each property) to evaluate background concentrations of metals. The properties represent areas at the Site that have historically consisted of residential land use. The samples will be collected from depths consistent with the depths of the samples collected from the areas of concern, with at least one sample collected from the 1-2 ft interval. The background soil samples will be analyzed for RCRA metals plus hexavalent chromium by EPA Methods 6020/7471 /7199. Proposed background sampling locations are shown on Figure 5. Upon completion of soil sampling activities, the soil borings will be properly abandoned and surfaces will be repaired to generally match pre -drilling conditions. Soil sample locations will be recorded in the field using a hand-held GPS unit. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 14 3.2 Groundwater Assessment Activities H&H will instruct the drilling contractor to utilize the DPT drill rig to advance borings for installation of eight (8) temporary groundwater monitoring wells. If refusal is encountered prior to reaching the water table in a proposed temporary groundwater monitoring well location, H&H will instruct the driller to utilize alternative drilling techniques to advance the boring to depths corresponding to the water table. The approximate locations of the proposed temporary monitoring wells are shown on the sample location map, which are presented as Figures 3 through 5, and are described below: Figure 3 • upgradient location in the southwestern portion of the Site (927 South Saunders Street). Figure 4 • in the vicinity of the potential UST system (1001 South Saunders Street); • downgradient of the existing structure where chlorinated solvent impacts were observed in sub -slab soil gas samples (1001 South Saunders Street); • upgradient locations in the northwestern and southwestern portions of the Site (1015 South Saunders Street); • downgradient of historical Site operations (1015 South Saunders Street); and • central and downgradient locations at the 1017 South Saunders Street property. During drilling, soil samples will be collected and logged for lithologic description and field screened for presence of staining and elevated concentrations of volatile organic vapors using a PID. The temporary monitoring wells will be constructed of 1-inch diameter PVC with 10 ft of pre -pack well screen set to bracket the water table and 1-inch diameter PVC well casing to the ground surface. A sand filter pack will extend from below the base to approximately 2 ft above the top of the pre -packed well screens. The temporary wells will be completed by placing a hydrated bentonite seal from the top of the sand filter pack to the ground surface. Once the temporary monitoring wells are installed, the wells will be allowed to equilibrate to static 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 15 conditions and a decontaminated electronic water level indicator will be used to measure the depth to the water table relative to the ground surface. The wells will then be developed by removing a minimum of 3 to 5 well volumes and observing stable field parameters (i.e. pH ± 0.1 SU and conductivity varies no more than 5%). After development, a groundwater sample will be collected utilizing low flow/low stress purging techniques using a peristaltic pump and dedicated polyethylene tubing. The intake point of the pump tubing will be placed approximately in the mid -portion of the screened interval of the well and groundwater will be removed at a rate no greater than 200 milliliters per minute. H&H will utilize a water quality meter to measure pH, temperature, dissolved oxygen, oxidation reduction potential, turbidity, and specific conductivity at 3 to 5-minute intervals during purging. Purging will be considered complete when water quality parameters stabilize (i.e. pH f 0.1 SU, conductivity varies no more than 5%, and turbidity is less than 10 NTUs). Once groundwater parameters stabilize, groundwater samples will be collected directly into laboratory supplied sample containers using the "soda straw" method to minimize volatile loss through the peristaltic pump head. The sample containers will be labeled with the sample identification, date, and requested analysis, and placed in a laboratory supplied cooler and iced. The samples will be delivered to a North Carolina certified laboratory under standard chain of custody protocols for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270 and RCRA metals by EPA Methods 6020/7471. Prior to abandonment, H&H gauge all temporary monitoring well locations for depth to water measurements. In addition, H&H will contract with a professional land surveyor (PLS) to measure top of casing (TOC) elevations at each temporary monitoring well and record the locations using a GPS unit. Using TOC elevations and depth to water measurements, H&H will provide groundwater flow map in the Brownfields Assessment Report. Upon completion of groundwater sampling activities, the temporary monitoring wells will be properly abandoned by a licensed well driller and surfaces will be repaired to generally match pre -drilling conditions. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc 14 hart hickman SMARTER ENVIRONMENTAL SOLUTIONS Mr. Kelly Johnson November 14, 2019 Page 16 3.3 Surface Water and Sediment Sampling Activities H&H proposes to collect three (3) co -located surface water and sediment samples for laboratory analysis from on -Site portions of Rocky Branch Creek. Co -located surface water and sediment sample locations are shown on Figures 3 and 4. The surface water and sediment samples will be collected in a downstream to upstream order. If portions of the stream in the area of a proposed sample location are found to be dry, a sample will be collected at the nearest location with surface water. H&H will utilize water quality meters to collect measurements of pH, temperature, dissolved oxygen, oxidation reduction potential, turbidity, and specific conductivity of surface water at each sample location. Surface water samples will be collected during base flow conditions. Sediment samples will be collected from the base of the stream in the mid - portion of the stream channel at each sample location using a decontaminated stainless steel AMS dredge sampler. Surface water and sediment samples will be collected directly into laboratory -supplied sample containers. The sample containers will be labeled with the sample identification, date, and requested analysis, and placed in a laboratory supplied cooler and iced. The surface water samples will be delivered to a North Carolina certified laboratory under standard chain of custody protocols for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA by EPA Method 6020/7471. In addition, sediment samples will also be analyzed for hexavalent chromium by EPA Method 7199 and surface water samples will also be analyzed for hardness by Standard Method 2340B to calculate North Carolina surface water standards for metals which are hardness dependent. Upon completion of sampling, the co -located surface water and sediment sample locations will be estimated using a hand-held GPS unit. 3.4 Quality Assurance/Quality Control Samples Laboratory quality assurance/quality control (QA/QC) procedures will be employed to ensure 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 17 appropriate sample handling and analysis and to aid in the review and validation of the analytical data. QA/QC procedures will be conducted in accordance with EPA method protocols and will include regular equipment maintenance, equipment calibrations, and adherence to specific sample custody and data management procedures. In accordance with approved methodologies, samples will be analyzed in conjunction with appropriate blanks, laboratory duplicates, continuing calibration standards, and surrogate standards to monitor both instrument and analyst performance. H&H will request that the laboratory reporting limits for each analyte will be at or below appropriate screening criteria. Additionally, H&H will request that the laboratory include J Flags, which are estimated concentrations for compounds that are detected at levels above the laboratory method detection limit, but below the laboratory reporting limit. The following activities will be conducted by H&H for QA/QC purposes: • non -dedicated equipment and tools will be decontaminated prior to use at each boring or sampling location, or following exposure to soil, groundwater, surface water, or sediment; • one duplicate soil and one duplicate sediment sample will be analyzed for VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA metals plus hexavalent chromium by EPA Methods 6020/7471/7199; • one duplicate groundwater and one duplicate surface water sample will be analyzed for VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA metals by EPA Method 6020/7471; and • one trip blank will accompany samples during sampling activities and shipment. The trip blank will be analyzed for VOCs by EPA Method 8260. A copy of the laboratory analytical data report and QA package for each group of samples submitted to and analyzed by the subcontracted laboratory will be provided in an appendix to the final report. Laboratory QA data consistent with Level II documentation will be requested for this project. A copy of the completed chain -of -custody record and shipping receipt will be appended to the corresponding laboratory analytical report included with the final report. 14 hart hickman P. S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV1 to DEQ 10-17-2019\BF Assessment WP SMARTER ENVIRONMENTAL SOLUTIONS - S. Saunders St. Assemblage - Rev 1_20191109.doc Mr. Kelly Johnson November 14, 2019 Page 18 3.5 Investigation Derived Waste Investigation derived waste (IDW) generated during the assessment activities will be thin spread on -Site. However, if significant impacts are suspected (i.e., high PID readings, free -product, etc.) the soil cuttings and/or generated groundwater will be containerized in 55-gallon drums and staged on -Site pending analytical results of composite IDW samples. IDW generated during the proposed assessment activities will be managed in accordance with DEQ IHSB Guidelines. 3.6 Reporting Following completion of the assessment activities and receipt of the analytical data, H&H will document our findings in a Brownfields Assessment Report. The report will include a description of the sampling activities, figures depicting sample locations, sample data, and groundwater elevation data (including approximate groundwater flow direction), soil boring logs, laboratory analytical data, a discussion of the data in comparison to regulatory screening levels, Brownfields receptor survey results, IDW manifests (if applicable), and conclusions and recommendations concerning our activities. Please contact me if you have any questions or require additional information Sincerely, Hart & Hickman, PC #C-1269 Engineering #C-245 Geology r�< c, M 0Ai'V Leonard Moretz, PG, RSM Senior Project Manager Attachments S:\AAA-Master Projects\Merge Capital (MRG)\MRG-003 South Saunders Street Assemblage\Brownfields Assessment (Soil, Groundwater, SW, and SED)\Work Plan\REV 1 to DEQ 10-17-2019\BF Assessment WP - S. Saunders St. Assemblage - Rev 1_20191109.doc SEAL 2Z; Aft I0iat01 ulr•►4• 11/14/19 Justin Ballard, PG Project Manager 14 hart hickman P. SMARTER ENVIRONMENTAL SOLUTIONS Towel '' •, ..r. 1-7 - - k - APPROXIMATE N 0 2000 4000 SCALE IN FEET U.S.G.S. QUADRANGLE MAP RALEIGH WEST, NORTH CAROLINA, 2002 QUADRANGLE 7.5 MINUTE SERIES (TOPOGRAPHIC) l OROTHEA DIX PARK "WL GJ 0 1 tVIP, `+4 � LEGEND BROWNFIELDS PROPERTY BOUNDAI BROWNFIELDS PARCEL LINES 1 SITE PARCEL ID CAPITAL AREA GREENWAY - ROCKY BRANCH TRAIL ROCKY BRANCH CREEK Map ID Address 1 927 South Saunders Street 2 951 South Saunders Street 3 0 South Dawson Street 4 1001 South Saunders Street 5 1015 South Saunders Street 6 1017 South Saunders Street 7 1019 Mount Hope Drive 8 1019 South Saunders Street 9 1021 B South Saunders Street 10 1021 South Saunders Street 11 1 1023 South Saunders Street 12 1029 South Saunders Street 13 1027 South Saunders Street 14 0 South Saunders Street 15 1035 South Saunders Street 16 1033 South Saunders Street 17 1025 South Saunders Street 18 1041 South Saunders Street 19 0 Green Street 20 1031 South Saunders Street rp 8 APPROXIMATE 0 150 300 NOW SCALE IN FEET SITE MAP PROJECT SOUTH SAUNDERS STREET ASSEMBLAGE RALEIGH, WAKE COUNTY, NORTH CAROLINA BROWNFIELDS PROJECT NO. 21050-17-092 H&H JOB NO. FHD-005 h a rt 1 h i c k m a n Raleigh, g onset Ridge Road, Suite 301 Ralei h, North Carolina 27607 . 919-847-4241(p) 919-847-4261(f) SMARTER ENVIRONMENTAL SOLUTIONS License # C-1269 / #C-245 Geology DATE: 11-6-18 REVISION NO. 0 JOB NO. MRG-003 FIGURE NO. 2 146 RUMS AO F SOIL N . 13 12 .► 17•- 14.. 16 t LEGEND BROWNFIELDS PROPERTY BOUNDARY BROWNFIELDS PARCEL LINES 10 SITE PARCEL ID PROPOSED GROUNDWATER SAMPLING LOCATION O PROPOSED BACKGROUND SOIL SAMPLING LOCATION • PROPOSED SOIL SAMPLING LOCATION Map ID Address 2 951 South Saunders Street 3 0 South Dawson Street 5 1015 South Saunders Street 6 1017 South Saunders Street 7 1019 Mount Hope Drive 8 1019 South Saunders Street 9 1021B South Saunders Street 10 1021 South Saunders Street 11 1023 South Saunders Street 12 1029 South Saunders Street 13 1027 South Saunders Street 14 j 0 South Saunders Street 15 1035 South Saunders Street 16 1033 South Saunders Street 17 1025 South Saunders Street 18 1041 South Saunders Street 19 0 Green Street 20 1031 South Saunders Street NOTES 1. AERIAL MAP ACLJUIRED FROM GOOGLE EARTH a APPROXIMATE 0 60 120 SCALE IN FEET SAMPLE LOCATION MAP PARCELS 9, 15, 18, & 20 `-" ET SOUTH SAUNDERS STREET ASSEMBLAGE RALEIGH, WAKE COUNTY, NORTH CAROLINA BROWNFIELDS PROJECT NO. 21050-17-092 H&H JOB NO. FHD-005 3921 Sunset Ridge Road, Suite 301 hart ^• h i c k m a n Raleigh, North Carolina 27607 . 919-847-4241(p) 919-847-4261(f SMARTER ENVIRONMENTAL SOLUTIONS T.icense # C-1269 / #C-245 Geology DATE: 12-27-18 REVISION NO. 0 JOB NO. MRG-003 FIGURE NO. 5