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HomeMy WebLinkAboutBASF-BF Assmt Work Plan-12012ALTAMONT ENVIRONMENTAL, INC. ENGINEERING & HYDROGEOLOGY 231 HAYWOOD STREET, ASHEVILLE, NC 28801 TEL .828 .281.3350 FAC .828.281.3351 WWW, ALTA MONTE NVI RON MENTAL.COM December 23, 2010 Ms. Tracy Wahl Brownfields Project Manager NC Department of Environment and Natural Resources 25 Heritage Drive Asheville, North Carolina 28806 Subject: Brownfields Site Assessment Work Plan Former BASF Corporation Facility Enka, North Carolina Dear Ms. Wahl: On behalf of Enka Partners of Asheville, LLC (Enka Partners), Altamont Environmental, Inc. (Altamont) has prepared this Brownfields Site Assessment work plan based on discussions with the North Carolina Department of Environment and Natural Resources (DENR), Division of Waste Management (DWM) personnel. Background The subject property is a portion of the former BASF facility located off of Sand Hill Road in the Enka community of Buncombe County, North Carolina. The subject property was purchased from BASF by Enka Partners of Asheville, LLC (Enka Partners). Enka Partners (the landowner and prospective developer) is managing the portions of the property that will be investigated during the Brownfields Site Assess ment. Enka Partners is in the process of redeveloping the property under a Brownfields agreement with the DENR and plans to use the property for retail space. A site location map is attached as Figure 1. A Brownfield Area Reconnaissance and Receptor Survey were conducted for this property by Altamont in October 2008. According to the survey, two private water supply wells were located within one-half mile of the subject property. Site Assessment It has been determined that there are three main areas of concern on the property that DENR would like Enka Partners to have investigated as part of the Brownfields Site Assessment: • The caustic tanks recently discovered on-site • Soi l brought on-site from a Mission Hospital construction area • Former spray pond area Caustic Tanks Enka Partners is taking responsibility for the assessment of the caustic tank area (Figure 2). Altamont developed a work plan to confirm that contamination does not exist following tank removal and cleanup. The confirmation sampling work plan was submitted to the DENR Division of Waste Management Hazardous Waste Section on November 2, 2010, for the assessment of the soils P:\Enka Partners\Correspondence\Final Brownfields Work Plan\Brownfield Site Assessment Work Plan_Enka Partners Final.Doc Ms. Tracy Wahl December 23, 2010 Page 2 of 6 in this area. Excess soil and decontamination liquid that results from drilling during this task will be containerized in a 55-gallon drum{s). Based upon the analytical results of the soil sample taken from the boring, the containerized material will either be: 1. Spread on-site (if the soils do not contain contaminants in levels greater than the DENR Inactive Hazardous Sites Branch's {IHSB's) standards), 2. Transported to a subtitle D landfill (if soils are greater than the IHSB limits, but non- hazardous), or 3. Transported to a certified hazardous disposal facility/landfill (if soils exceed IHSB limits and are classified as hazardous). The wo-rk plan was approved by DENR on November 9, 2010, and sampling is scheduled to begin during January 2011. Please refer to the attached work plan and approval letter in Appendix A for more information. Soils from Off-Site Location Based on the November 4, 2010, meeting between Altamont, Enka Partners, and the DENR, it was determined that soils have been brought on-site from an off-site source. Altamont reviewed the following reports to aid in the preparation of this soil assessment: • Bunnell-Lammons Engineering, Inc. (BLE), October 22, 2007, Report of Preliminary Geotechnical Exploration for the Mission Hospitals Victoria Road Realignment Project • BLE, December 14, 2009, Report of Geotechnical Exploration for the Orthopedic Appliance Company Proposed Medical Office Building After reviewing the geotechnical documents described above and based on correspondence with Jay Maveety of Mission Hospitals, soils that were placed on the former BASF site originated most likely from the construction area west of Victoria Road and east of McDowell Street in downtown Asheville, North Carolina. The reports mentioned above did not identify any potential sources of contamination for the soils. However, the DENR has requested that samples be collected from these soils to confirm they are not contaminated. The approximate off-site soil area consists of 1.35 acres and is indicated on the attached Figure 2. Soil Samples Altamont will mobilize to the site and install hand auger borings in four soil sample locations. The borings will be located throughout the area where the soils from the Mission Hospital construction site were placed. The exact sample locations and depths will be determined in the field. Disposable gloves will be utilized and changed between sampling locations to avoid cross- contamination. The hand auger will be decontaminated between sampling locations using a Liquinox® wash and distilled water rinse. Excess soil from the hand augering will be placed back in the boring hole from which it came. One duplicate sample and an equipment rinsate blank will be collected. All samples will be placed in the appropriate sample containers in a cooler on ice to await delivery to the laboratory. Laboratory Analysis Altamont will utilize a laboratory appropriately certified by the State of North Carolina to analyze the soil samples. The proposed samples will be analyzed for Hazardous Substance List (HSL) metals using SW-846 Methods 6010 and 7471 (for mercury) and Total Petroleum Hydrocarbons (TPH)-Gasoline Range Organics (GRO) and Diesel Range Organics (DRO) using EPA Method 8015. HSL metals include antimony, arsenic, beryllium, cadmium, chromium, copper, lead, manganese, mercury, nickel, selenium, silver, thallium, and zinc. Former Spray Pond A pond used to exist in the northern portion of the site that was utilized in the past by BASF as a wastewater spray pond (Figure 2). DENR has requested that this former pond area be assessed during the project by collecting and analyzing soil and groundwater samples. P:\Enka Partners\Correspondence\Final Brownfields Work Plan\Brownfield Site Assessment Work Plan_Enka Partners_Final.Doc Ms. Tracy Wahl December 23, 2010 Page 3 of 6 Soil Samples Altamont will mobilize to the site and direct the drilling contractor, who will be present for the caustic tank area assessment, to advance soil borings in four sample locations. The borings will be located within the footprint of the former spray pond. The exact sample locations and depths will be determined in the field. One of the soil samples will be collected during the monitoring well installation mentioned below. All equipment, well materials, and tools that will enter the borehole must be steam-cleaned with a high-temperature pressure washer prior to installation. The cleaned materials will be protected from possible contaminants (e.g. wrapped in clean plastic). Water used in the decontamination processes, as well as during the drilling should be obtained from a source of known quality that does not contain constituents of concern. Disposable gloves will be utilized and changed between sampling locations to avoid cross- contamination. A decontaminated stainless steel spoon and bowl will be utilized to collect each soil sample and will be decontaminated using a Liquinox® wash and distilled water rinse between sampling locations. All samples will be placed in the appropriate sample containers in a cooler on ice to await delivery to the laboratory. Excess soil and decontamination liquid that results from drilling will be containerized in a 55-gallon drum(s). Based upon the analytical results of the soil sample taken from the boring, the containerized material will either be: 1. Spread on-site (if the soils do not contain contaminants in levels greater than the DENR Inactive Hazardous Sites Branch's (IHSB's) standards), 2. Transported to a subtitle D landfill (if soils are greater than the IHSB limits, but non-hazardous), or 3. Transported to a certified hazardous disposal facility/landfill (if soils exceed IHSB limits and are classified as hazardous). Monitoring Well Installation and Groundwater Samples Monitoring Well Installation A monitoring well will be installed within the footprint of the former spray pond to facilitate the collection of groundwater samples. Altamont will direct the North Carolina licensed drilling contractor to install the monitoring well screened across the water table. The monitoring well boring will be advanced using 4.25-inch hollow-stem augers (HSAs) powered by a conventional drill rig. The standard methods for the design and installation of the monitoring well will be followed, which includes installing a sand pack and grouting the monitoring well in place. Boring logs and monitoring well construction logs will be prepared and included in the final summary report. All equipment, well materials, and tools that will enter the borehole must be steam-cleaned with a high temperature pressure washer prior to installation. The cleaned materials will be protected from possible contaminants (e.g. wrapped in clean plastic). Water used in the decontamination processes, as well as during the drilling and well installation procedures, as described below, should be obtained from a source of known quality that does not contain constituents that could compromise the integrity of the monitoring well. Altamont will collect soil screening samples every five feet within the monitoring well boring. Each sample will be mixed and then split. Each split soil sample will be placed into a new low-density polyethylene bag (i.e. Ziploc® bag), which will then be sealed. One bag of the split sample will be allowed to volatilize in a warm environment for at least ten minutes, while the other split sample will be placed on ice in a cooler. Using a Mini-RAE 2000® organic vapor analyzer (OVA) with photo ionization detection (PIO), the headspace in each bag that was allowed to warm and volatilize will be screened for indications of volatilized organic compounds (VOCs). Altamont will collect a sample from the split soil sample (using the corresponding sample in the cooler) with the highest reading on the OVA. If the soil screening does not indicate the presence of voes, Altamont will collect a soil sample from the perceived bottom of the former spray pond. The approximate depth of the bottom will be determined based upon soil lithology observed during the installation of the soil borings. P:\Enka Partners\Correspondence\Final Brownfields Work Plan\Brownfield Site Assessment Work Plan_ Enka Pcirtners_Final .Doc Ms. Tracy Wahl December 23, 2010 Page 4 of 6 The monitoring well will be composed of two-inch nominal inside-diameter (ID) Schedule 40 PVC. The screen shall be 10 feet in length and will be machine-slotted with 0.010-inch slots. The filter pack material will be a clean, washed, well-rounded silica sand sized to perform as a filter between the formation material and the well screen. The bentonite seal shall be composed of commercially manufactured sodium bentonite pellets, which do not exceed 0.25-inch in diameter. If the bentonite is installed above the water table, as is anticipated during this task, then clean, potable water will be used to hydrate the bentonite. The cement grout will consist of a neat mixture of Portland cement and water in the proportion of approximately six to seven gallons of approved water per 94-pound bag of cement. Water may be added to the mix in small amounts, at the discretion of Altamont, to achieve pumpability. The casing/screen assembly for the monitoring well will be installed as follows: • Prior to installation of the casing and screen, the lengths and diameters of all components (including the bottom plug or cap) will be measured (to the nearest hundredth foot) and recorded in the field book. The casing riser and screen assembly will be installed round, plumb, and true-to-line. • The well screen will be connected to the riser sections of the casing assembly. The well screen will be installed so as to straddle the free water surface, extending both above and below the water table to accommodate seasonal or other variations in its elevation. In all cases, the top of the screen will be located at least two feet below the base of the down hole bentonite seal. • The filter pack will be placed in the annulus between the well material and borehole by pouring the material directly through the annular space between the well and the borehole/HSAs. A clean PVC pipe or weighted tape will be used as a tamping device to prevent bridging of the filter pack and to continuously tag its depth. The HSAs will be raised incrementally during the installation of the filter pack. Care will be taken to keep the bottom of the HSAs below the top of the filter pack during installation. The level of the top of the filter pack in the annulus will be verified by tag-line measurement during all phases of placement. The filter pack will extend at least two feet above the top of the screen. The volume of the installed filter pack will be compared with the annular volume to verify proper placement of the filter pack. This material accounting will be recorded in the field book. • A bentonite seal at least two feet thick will be placed immediately above the filter pack. The method of bentonite seal placement shall be the same as for the filter pack. The bentonite pellet seal will be hydrated either by pouring water or utilizing the tremie pipe with an approximately equal volume of clean, potable water, and allowed to sufficiently hydrate. If water is used, its source and the volume used will be documented in the field book. The level of the top of the bentonite seal will be verified by tag-method measurement prior to grouting. • To grout the remaining annular space, a side-discharging tremie pipe will be maintained three feet above the bentonite seal and will be used to slowly place the cement/bentonite grout mixture. The HSAs will be pulled incrementally during the grouting procedures to limit borehole collapse. Grout will be pumped into the annulus through the tremie pipe until undiluted grout flows from the borehole at the ground surface. The grout will be allowed to cure for at least 24 hours prior to development. All soil and fluid cuttings that result from drilling will be containerized in a 55-gallon drum(s). Based upon the analytical results of the soil sample taken from the boring, the containerized material will either be: 1. Spread on-site (if the soils do not contain contaminants in levels greater than the DENR Inactive Hazardous Sites Branch's (IHSB's) standards), 2. Transported to a subtitle D landfill (if soils are greater than the IHSB limits, but non-hazardous), or 3. Transported to a certified hazardous disposal facility/landfill (if soils exceed IHSB limits and are classified as hazardous). P:\Enka Partners\Correspondence\Final Brownfields Work Plan\Brownfield Site Assessment Work Plan Enka P;;irtners Final.Doc - Ms. Tracy Wahl December 23, 2010 Page S of 6 Monitoring Well Development After installation and a minimum 24-hour period for grout curing, the monitoring well will be developed using either surge-and-bail or swab-and-pump methods, depending on well depth and yield. The development method should include methods of moving water both inward, from the formation into the screen, and outward, from the screen into the formation material. The water level and height of sediment in the well should be measured and recorded in the field log book prior to development. In most cases, the initial well development method will be hand-bailing to remove accumulated sediment in the well. The bailer will be allowed to fall freely through the well past the water surface until it strikes the bottom of the well. The bailer will be raised to the surface vigorously to create a high-action level of water movement. This free fall and rapid removal will provide some surging action to the filter pack and proximal formation material. To enhance the removal of sediment, the bailer should be intermittently agitated by rapid short upward strokes from the bottom of the well. Bailing should be continued until the water is free from suspended sand-sized sediment. A surge block may be needed to create a stronger surging action than the bailer does. If this is the case, the surge block and the bailer will be used in conjunction with one another. After utilizing the surge block for a short period of time, the sediment that entered the well as a result of the surging will be removed with the bailer, as described in the previous paragraph. The surge block will be composed of inert material that will not affect the water quality in the well. Caution will be employed to ascertain that the block can move freely up and down the inside of the well without obstructions. The vertical action of the surge block will be accomplished manually. Care will be taken in the length of the strokes, the velocity of the up-and-down movement, and the duration of each surge block cycle. If the surging action is too vigorous for the well construction and formation characteristics, then the activity can be detrimental to the well integrity. Water discharged from the monitoring well(s) during the development process will be containerized in a SS-gallon drum(s). Based upon the analytical results of the water samples taken from the well, the containerized material will either be: 1. Spread on-site (if the water samples do not contain contaminants in levels greater than the DENR Inactive Hazardous Sites Branch's (IHSB's) standards), 2. Transported to a certified non-hazardous disposal facility (if water samples are greater than the IHSB limits, but non-hazardous), or 3. Transported to a certified hazardous disposal facility/landfill (if water samples exceed IHSB limits and are classified as hazardous). Development criteria will include the stabilization of standard field parameters. These criteria will be refined, based on the initial results at each site, with the objective being to achieve minimum turbidity in all wells. During the pumping stage of development, pH, specific conductivity (SC), dissolved oxygen (DO), oxidation-reduction potential (ORP), temperature, and turbidity will be measured generally once for every well volume removed. For each monitoring well, the well development and measurement of field parameters will be documented on a monitoring well development and sampling log. Monitoring Well Groundv·1ater Sampling Groundwater sampling will be conducted by personnel properly trained in procedures for collecting, labeling, packing, and shipping the samples. The monitoring well will be purged using low-flow techniques in accordance with the procedures described in Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures United States Environmental Protection Agency (EPA), Groundwater Issues (April 1996). New polyethylene tubing will be used to purge and sample each well. During purging, the pH, SC, DO, ORP, turbidity, and temperature will be measured and recorded every three minutes. Well purging will continue until these parameters stabilized (three successive readings in which pH +/-0.1 unit; SC +/-3 percent; temperature, DO and turbidity+/-10 percent; and ORP +/-10 millivolts). After parameters have stabilized, groundwater samples will be collected. P:\Enka Partners\Correspondence\Final Brownfields Work Plan\Brownfield Site Assessment Work Plan_ Enka Partners_Fina!. Doc FIGURES E CC C C BALE & PALLET RECYCLE AREA CC C C CC C C CC C C CC C C CC C C CC C C CC C C CC C C EL E C T R I C A L TR A S H AP R O N CO N C . MEC H A N I C A L TR A S H STO P S T O P CC C C CC C C CC C C CC C C CC C C STO P RETAIL 'C'±26,300 SFFF:2067.00 RETAIL 'D'±64,015 SFFF:2067.00 RETAIL 'E'±30,185 SFFF:2067.00 RETAIL 'F'±20,000 SFFF:2067.00 RETAIL 'G'±49,531 SFFF:2067.00 RETAIL 'H'±45,821 SFFF:2067.00 RETAIL ' I ' ±23,32 5 S F FF:208 6 . 0 0 BANK 'J'±4,500 SFFF:2063.00 RE S T . ' K ' ±4 , 2 0 0 S F REST. 'M'±6,163 SFFF:2063.00 REST. 'N'±3,974 SFFF:2063.00 RETAIL 'A'±11,050 SFFF:2063.00 RE T A I L ' B ' ±2 1 , 2 0 0 S F FF : 2 0 6 5 . 0 0 PROPOSED SWM POND #2 FF : 2 0 6 3 . 0 0 OFFICE 'Q'BUILDING #1 VA N VA N T VA N B-1[NFA]B-2[NFA] D[NFA - deed restricted] C-2[NFA] C-1[NFA] M-1 & M-2[NFA - deed restricted] 2  ¦      0 100 20050Feet Legend        !> APPENDIX A Enka Partners Confirmation Sampling Plan and Approval Letter North Carolina Department of Environment and Natural Resources Division of Waste Management Beverly Eaves Perdue Dexter R. Matthews Dee Freeman Governor Director Secretary PO Box 384, Lake Lure, North Carolina 28746 Phone\ FAX: 828-625-0171 \ Internet: Roberta.Proctor@ncdenr.gov An Equal Opportunity / Affirmative Action Employer - 50 % Recycled \ 10 % Post Consumer Paper November 9, 2010     Mr. Kenneth Murphy  Enka Partners of Asheville, LLC.       c/o Taylor & Murphy Construction Co., Inc.   1121 Brevard Road, PO Box 6215  Asheville, NC 28816    Re:  Confirmation Sampling Plan as required by Notice of Violation Docket # 2010‐067    Dear Mr. Murphy:    I have reviewed the Confirmation Sampling Plan (ISSP) submitted in response to the Notice of Violation Docket  number 2010‐067. I am approving the plan as written with the following amendments:  1. All samples collected in the “sodium hydroxide tank area” the “former Stockpile areas” and the  “ponded water area” must be analyzed for the full range of RCRA metals (Arsenic, Barium, Lead,  Mercury, Chromium, and Cadmium).  2. The sample to be collected from the container area must be analyzed for the full spectrum of RCRA  metals and toluene.   3. Please contact Spring Allen and/or myself at least one week prior to conducting on‐site sampling.       If you have any questions concerning this matter, please contact me at the numbers listed below.     Sincerely,      Roberta Proctor, Environmental Chemist  Hazardous Waste Section    Cc:  Central Files   Brent Burch   Spring Allen   Tracy Wahl, via electronic mail   William Clark, via electronic mail   Christopher Gilbert, via electronic mail    P:\Enka Partners\Correspondence\Confirmation Sampling Work Plan Final.Doc November 2, 2010 Ms. Roberta Proctor Western Area Environmental Chemist Hazardous Waste Section—Division of Waste Management NC Department of Environment and Natural Resources Post Office Box 384 Lake Lure, North Carolina 28746 Subject: Confirmation Sampling and Analysis Work Plan Enka Partners of Asheville, LLC Sand Hill Road Buncombe County, North Carolina Dear Ms. Proctor: On behalf of Enka Partners of Asheville, LLC (Enka Partners), Altamont Environmental, Inc. (Altamont) has prepared this confirmation sampling and analysis work plan in general accordance with the North Carolina Department of Environment and Natural Resources (DENR), Division of Waste Management (DWM), Hazardous Waste Section (HWS) Generator Closure Guidelines dated June 18, 2008. In addition to the guidance, Altamont reviewed the following reports to prepare this work plan: • A&D Environmental, Inc., April 6, 2010, Site Specific Material Sampling and Characterization Plan • A&D Environmental, Inc., May 6, 2010, Response to Comments Made by NC DENR Regarding Initial Site Sampling Plan as Required by Notice of Violation Docket # 2010.067 • A&D Environmental, Inc., June 22, 2010, Site Specific Material Sampling and Characterization Report • A&D Environmental, Inc., October 27, 2010, Sample Results and Waste Disposition, Enka Site [email] Background The subject property is a portion of the former BASF facility located off of Sand Hill Road in the Enka community of Buncombe County, North Carolina. The subject property was purchased by Enka Partners from BASF. Enka Partners is in the process of redeveloping the property. A site location map is attached as Figure 1. As part of the redevelopment, Enka Partners demolished several buildings. Inside one of the former buildings were four, 150,000-gallon aboveground, open-top storage tanks. The tanks presumably contained sodium hydroxide (NaOH) based upon labels that were painted on the tanks and subsequent pH measurements collected by A&D Environmental, Inc. (A&D). Enka Partners removed and sold as a usable product the contents of one of the tanks to a truck wash company. Following removal of the tank contents, Enka Partners demolished the tank and stockpiled residual solids, debris, and waste materials on site. The HWS inspected the subject property and observed the areas of stored waste as well as the results of Enka Partners activities. Following their inspection, the HWS issued an Immediate Action Ms. Roberta Proctor November 2, 2010 Page 2 of 4 P:\Enka Partners\Correspondence\Confirmation Sampling Work Plan Final.Doc Notice of Violation, Docket #2010-067 (NOV) on March 24, 2010. The HWS requested that Enka Partners take various actions to properly characterize and dispose of waste materials located on the subject property. Enka Partners hired A&D. A&D prepared and submitted a sampling plan to the HWS to satisfy the material and waste characterization components of the NOV. After submittal and approval of the site specific sampling plan by the HWS, A&D mobilized to the site and completed the sampling and waste characterization activities. Those activities are described in greater detail on the following pages. Now that the waste has been characterized, A&D plans to properly dispose of the waste in accordance with local, state, and federal regulations. Following waste removal and disposal, Altamont will complete confirmation sampling activities. The confirmation sampling activities are described on the following pages. Areas of Concern Altamont understands that the HWS has requested confirmation sampling in four areas. The four areas can be described as follows: • Tank area associated with a former building [Sodium Hydroxide (NaOH)] • Former stockpile area • Area of ponded water • Container area associated with a former building The locations of the four areas are indicated on Figure 2. Objective A&D collected samples from waste materials and sediments. Constituents were identified in A&D’s samples at concentrations in excess of HWS soil screening levels. The objective of the work described within this plan will be to determine if these constituents have impacted the underlying soil in excess of regulatory standards. Review of Existing Data Altamont reviewed A&D’s waste characterization sample laboratory analytical results. A&D collected samples from waste materials located in the previously described four areas of concern. A&D had samples analyzed as follows: • Tank Contents—Samples were analyzed for pH and alkalinity and for Resource Conservation and Recovery Act (RCRA) metals in accordance with the Toxicity Characteristic Leaching Procedure (TCLP) • Former Stockpile Material—Samples were analyzed for pH and Asbestos and for RCRA metals using a total waste analysis (results reported in milligrams per kilogram) • Water Within and the Sediments Beneath the Area of Ponded Water—Water samples were analyzed for pH and RCRA metals using a total waste analysis (results reported in milligrams per liter) and sediment samples were analyzed for RCRA metals in accordance with the Toxicity Characteristic Leaching Procedure (TCLP) and using a total waste analysis (results reported in milligrams per kilogram) Ms. Roberta Proctor November 2, 2010 Page 3 of 4 P:\Enka Partners\Correspondence\Confirmation Sampling Work Plan Final.Doc • Container Contents—Liquid samples were analyzed for pH, polychlorinated biphenyls (PCBs), volatile organic compounds (VOCs), and RCRA metals using a total waste analysis (results reported in milligrams per liter) The TCLP sample results were multiplied by a factor of 20 consistent with the conventional practice for converting between total waste analyses in milligrams per kilogram and TCLP analyses in milligrams per liter. Altamont compared the converted TCLP results as well as the available total waste analyses results to HWS soil screening levels. Additionally, Altamont compared the pond water sample results to the groundwater standards published in Title 15A subchapter 2L .0202 of the North Carolina Administrative Code (2L Standards). Based upon Altamont’s review, the following constituents of concern were identified in the following areas and matrices: • Tank area associated with a former building [Sodium Hydroxide (NaOH)] ° Tank 1—Arsenic and Mercury ° Tanks 2 and 3—Mercury • Former Stockpile Area—Lead, Mercury, Chromium, and Cadmium • Area of Ponded Water ° Arsenic, Mercury, and Cadmium in Soil ° Arsenic, Barium, Lead, Mercury, and Chromium in Water • Container area associated with a former building—Chromium and Toluene Confirmation Sample Collection After the stockpiled waste products are removed, Altamont will implement a confirmation sampling program. Altamont will contact North Carolina “one call” to locate publically owned utilities. Additionally, Altamont will develop a site specific health and safety plan for the protection human health and safety during the implementation of the work. Altamont will utilize a North Carolina licensed drilling contractor to install ten temporary borings using direct-push technologies at the sample locations indicated on the attached Figure 2. The borings and the proposed sample analyses are summarized on the attached Table 1. Altamont will direct the drilling contractor to install each boring to the necessary depth for collection of samples. The drilling contractor will use direct-push sampling equipment to collect continuous undisturbed cores from each borehole. The drilling contractor will collect the undisturbed cores in plastic sleeves. Altamont will record the estimated soil origin, consistency, color, grain size, and other ancillary descriptions of the soil (e.g. staining and moisture content) on soil boring logs. The borings will be advanced to two feet below ground surface (not including the thickness of any remaining building and tank foundations). Altamont will collect biased soil samples from the unsaturated zone based upon the presence of residual contamination and a visual evaluation of characteristics like staining and odor. All samples will be placed in a cooler on ice to await delivery to the laboratory. Sample Analyses Altamont will utilize a laboratory appropriately certified by the State of North Carolina to analyze the samples. The proposed samples will be analyzed for the constituents summarized on Table 1. The following analytical methods will be used: • Metals (except Mercury)—Environmental Protection Agency (EPA) Method 6010 SITE LOCATION MAP FIGURE1 P:\Enka Partners\Figures\GIS\Figure 1 - Site Location Map.mxd ¦ Drawn By: Amy BondurantProject Manager: Chris GilbertClient: Enka PartnersDate: 10/28/2010 Scale ENKA PARTNERS OF ASHEVILLE, LLCSAND HILL ROADBUNCOMBE COUNTY, NORTH CAROLINA 0 1,000 2,000500Feet Site Location USGS Topo Map: Enka QuadrangleCreated: 1961Photorevised: 1978 Ta b l e  1 Pr o p o s e d  Co n f i r m a t i o n  Sa m p l e  An a l y s e s En k a  Pa r t n e r s  of  As h e v i l l e ,  LL C Sa n d  Hi l l  Ro a d Bu n c o m b e  Co u n t y ,  No r t h  Ca r o l i n a So i l Co n s t i t u e n t  to  be  An a l y z e d Ar e a S a m p l e  ID A r s e n i c B a r i u m L e a d M e r c u r y C h r o m i u m C a d m i u m T o l u e n e GP ‐T1 X X GP ‐T2 X GP ‐T3 X GP ‐P1 X X X X X X GP ‐P2 X X X GP ‐P3 X X X GP ‐P4 X X X GP ‐P5 X X X Fo r m e r  St o c k p i l e   Ar e a GP ‐S1 X X X X Co n t a i n e r  Ar e a G P ‐C1 X X So d i u m  Hy d r o x i d e   Ta n k  Ar e a Po n d e d  Wa t e r  Ar e a P: \ E n k a  Pa r t n e r s \ A n a l y t i c a l  an d  Da t a \ t b l ‐Pr o p o s e d A n a l y s e s . x l s Page  1  of  1