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FREE PRODUCT RECOVERY REPORT
IN AND OUT CONVENIENCE
226 SOUTH NC HWY 705
ROBBINS, MOORE COUNTY, NORTH CAROLINA
PREPARED FOR:
MR. DAVID CHEEK
BIG CEDAR CREEK PROPERTIES, LLC
605 GEORGE P ROAD
ROBBINS, NORTH CAROLINA 27325
PREPARED BY:
PILOT GEOLOGICAL, PLLC
PO BOX 128
KERNERSVILLE, NORTH CAROLINA 27285
NOVEMBER 23, 2022
PILOT PROJECT NO. G-5624.7
SITE INFORMATION
Site Name and Location In and Out
226 South NC Highway 705
Robbins, North Carolina
Incident No. 42273
Facility ID: 00-0-0000028988
Latitude and Longitude: 35 25’ 55.88”N; 79 35’ 07.33”W
Land Use Category: Commercial
Contacts
Owner of UST: Mr. David Cheek
Big Cedar Creek Properties, LLC
605 George P Road
Robbins, North Carolina 27325
(910) 464-3580
Primary Contact: Mr. David Cheek
Big Cedar Creek Properties, LLC
(910) 464-3580
Consultant: Pilot Geological, PLLC
PO Box 128
Kernersville, North Carolina 27285
(336) 310-4527
Contractor: Evo Corporation
1703 Vargrave Street
Winston-Salem, North Carolina 27107
(336) 725-5844
Release Information: Laboratory analysis of soil samples collected on April 7, 2020 during closure
activities of three 8,000-gallon commercial gasoline USTs detected petroleum compounds above the
North Carolina Action Levels. The estimated quantity of the release is unknown. Free product was not
observed during the removal activities.
Table of Contents
1.0 SITE HISTORY ................................................................................................................... 1
1.1 UST Information .......................................................................................................... 2
2.0 SITE GEOLOGY AND HYDROGEOLOGY ............................................................................... 2
3.0 FIELD ACTIVITIES .............................................................................................................. 3
4.0 CONCLUSIONS ................................................................................................................. 4
5.0 RECOMMENDATIONS ....................................................................................................... 4
6.0 QUALIFICATIONS OF REPORT ........................................................................................... 4
DRAWINGS
Drawing 1 USGS Topographic Map
Drawing 2 Site Map
Drawing 3 UST Location Map
Drawing 4 Monitoring Well Location Map
TABLES
Table 1 UST Information
Table 2 Monitoring Well Construction Information
Table 3 Summary of Groundwater Analytical Results
Table 4 Summary of Aggressive Fluid Vapor Recovery
Table 5 Cumulative Volume of LNAPL Recovered
Table 6 Aggressive Fluid Vapor Recovery Data
Table 7 Emissions Calculations
APPENDIX
Certificate of Disposal
Non-Hazardous Materials Manifest
AFVR Tracking Sheet
Free Product Recovery Report
In and Out
Pilot Project G-5624.7
November 23, 2022
1
1.0 SITE HISTORY
The site is located at 226 South NC Highway 705 in Robbins, Moore County, North Carolina
(Drawings 1 and 2). The site is occupied by the In and Out convenience store. Pilot completed an
Initial Abatement Action Report, dated May 22, 2020. A release was identified in the vicinity of the
former underground storage tank system (UST). Impacted soil above the North Carolina Soil-to-
Groundwater Maximum Soil Contaminant Concentrations (MSCCs) was identified in the vicinity of
the UST system. The North Carolina Department of Environmental Quality (NCDEQ) issued a Notice
of Regulatory Requirements (NORR) dated May 14, 2020 requesting that a Limited Site Assessment
(LSA) be completed. One inactive water supply well was identified approximately 330 feet to the
south of the site. The former USTs were located on an adjacent property to the north at 200 South
NC Highway 705. It is Pilot’s understanding that a legal easement is associated with the adjacent
property to the north where the USTs were located. The property located at 200 South NC Highway
705 formerly contained a NAPA auto parts store and an automotive service facility. An active gas
station is located northwest and adjacent to the 200 South NC Highway 705.
Pilot completed a LSA dated June 15, 2020. Based on the findings of the LSA, the NCDEQ issued
a NORR dated June 26, 2020 requiring that an Additional Risk Assessment Report (AAR) be
completed. A property transaction occurred subsequent to the completion of the LSA and a Notice
of Residual Petroleum (NORP) was filed.
Pilot completed an ARA dated August 26, 2020. Based on the findings of the ARA, the NCDEQ
issued a NORR dated October 8, 2020 requiring that a Comprehensive Site Assessment (CSA) be
completed. The ARA assessment indicated that the extent of the impacted soil has been
reasonably defined, but the extent of impacted groundwater had not. The detected
concentrations of benzene exceeded its Gross Contaminant Level (GCL) in monitoring wells MW-
1, MW-3 and MW-4.
Pilot completed a CSA dated March 22, 2021. Based on the findings of the CSA, laboratory
analysis of groundwater samples MW-5, MW-6 and MW-7 detected several targeted compounds
above their respective 2L Standards, but below their respective GCLs.
Pilot completed a Groundwater Monitoring Report for the site on December 27, 2021. On
December 1, 2021, Pilot collected groundwater samples from existing monitoring wells MW-1,
MW-2, MW-4, MW-5, MW-6, MW-7 and DW-1. Monitoring well MW-3 was not sampled based
on approximately 0.31 feet of free-product being measured in the well. Laboratory analysis of
the groundwater samples collected from monitoring well MW-2 did not detect targeted
compounds above the 2L Standards. Laboratory analysis of the groundwater samples collected
from monitoring wells MW-1, MW-4, MW-5, MW-6, MW-7 and DW-1 detected several targeted
compounds above their respective 2L Standards, with the concentration of benzene exceeding
its GCL in the samples collected from monitoring wells MW-1 and DW-1.
Free Product Recovery Report
In and Out
Pilot Project G-5624.7
November 23, 2022
2
Pilot conducted an Aggressive Fluid Vapor Recovery (AFVR) event in accordance with the NCDEQ
letter dated February 21, 2022. The field activities were completed by Pilot and EVO Corporation
on May 27, 2022. A total of 25 gallons of liquids were extracted from monitoring wells MW-1
and MW-3 during the AFVR event with approximately 1 gallon of which appeared to be free phase
petroleum product. Based on the data collected and calculations, approximately 47.56 pounds
of total VOC emissions were generated during the AFVR event. Approximately 8.67 gallons of
gasoline were calculated to be removed as liquid and emissions during the AFVR event.
Pilot completed a Groundwater Monitoring Report for the site dated August 22, 2022. On August
11, 2022, Pilot collected groundwater samples from existing monitoring wells MW-1, MW-2,
MW-4, MW-5, MW-6, MW-7 and DW-1. Monitoring well MW-3 was not sampled based on
approximately 0.46 feet of free-product being measured in the well. Laboratory analysis of the
groundwater samples collected from monitoring well MW-2 did not detect targeted compounds
above the 2L Standards. Laboratory analysis of the groundwater samples collected from
monitoring wells MW-1, MW-4, MW-5, MW-6, MW-7 and DW-1 detected several targeted
compounds above their respective 2L Standards, with the concentration of benzene exceeding
its GCL in the samples collected from monitoring wells MW-1 and DW-1.
Based on the presence of free product in monitoring well MW-3, the NCDEQ requested that a
free product recovery event be completed as documented in a letter dated October 21, 2022.
Project information is based on correspondence between NCDEQ personnel, Big Cedar Creek
Properties, LLC and Pilot, and the previously completed activities.
1.1 UST Information
A suspected release was identified during the removal of three 8,000-gallon gasoline USTs
(Drawing 3) on April 6 through 8, 2020. Laboratory analysis of soil samples confirmed the release
as well as on-site analysis by Red Lab, LLC (Red Lab) on April 9, 2020. Based on field observations
indicating a release beneath the USTs, approximately 169.86 tons of petroleum impacted soil was
excavated and transported to Earthtec of NC, Inc. (Earthtec) in Sanford, North Carolina for
disposal. UST information is summarized in Table 1.
2.0 SITE GEOLOGY AND HYDROGEOLOGY
The United States Geological Survey (USGS) Topographic Map, Robbins, North Carolina
Quadrangles depicts a structure on the adjacent property north of the site. Elevations on the site
range from approximately 462 feet above mean sea level on the northwestern portion of the site
to approximately 460 feet above mean sea level on the southern portion of the site. Buck Branch
is depicted approximately 1,500 feet northeast of the site. Based on the review of the USGS
topographic map and observations of the general area and site topography, surface run-off
would be expected to flow generally to the northeast across the site.
Free Product Recovery Report
In and Out
Pilot Project G-5624.7
November 23, 2022
3
The subject site is located within the Piedmont Physiographic Province. The Piedmont
Physiographic Province generally consists of hills and ridges which are dissected by a system of
swales and streams. The Piedmont Physiographic Province is predominantly underlain by
metamorphic rock (formed by heat, pressure and/or chemical action) and igneous rock (formed
directly from molten material). The topography and relief of the Piedmont Province has
developed from differential weathering of the igneous and metamorphic rock. Ridges and hills
have been developed in areas of less weathered rock. Because of the continued chemical and
physical weathering, rock in the Piedmont Physiographic Province is generally covered with a
mantle of soil that has weathered in place from the parent bedrock. These soils vary in thickness
and are referred to as residuum or residual soils. The residuum is typically finer grained and has
higher clay content near the surface because of the advanced weathering. Similarly, the soils
typically become coarser grained with increasing depth because of decreased weathering. As the
weathering decreases, the residual soils generally retain the overall appearance, texture and
foliations of the parent rock.
In general, groundwater movement in the Piedmont Physiographic Province is from higher to
lower elevations. As such, the presumed direction of groundwater flow is generally to the
northeast across the site. Based on the presumed groundwater flow direction, areas to the south
are potentially up-gradient of the site.
Soils at the site consist of sandy clay from the ground surface to approximately twelve feet bgs.
Saprolite was encountered at depths greater than 10 feet bgs. Partially weathered rock and
bedrock was encountered at approximately 18 feet bgs or greater.
3.0 FIELD ACTIVITIES
On November 10, 2022, Pilot conducted an Aggressive Fluid Vapor Recovery (AFVR) event in
accordance with the NCDEQ letter dated October 21, 2022. The field activities were completed
by Pilot and EVO Corporation. Monitoring wells MW-1, MW-3 and MW-4 (Drawing 4) were
utilized as extraction points during the AFVR event. The AFVR event consisted of using a vacuum
truck to remove free product, dissolved phase contamination and associated vapors. The amount
of product in MW-3 and surrounding wells was measured prior to and subsequent to the AFVR
event. Approximately 0.73 feet of free product was measured in monitoring well MW-3 prior to
the AFVR event. Monitoring wells MW-1 and MW-4 did not contain free product.
Based on the presence of free product in monitoring well MW-3 and the historically detected
dissolved phase concentrations in monitoring wells MW-1 and MW-4, each of these wells were
utilized for the AFVR event and were extracted from simultaneously. Approximately 30 feet of
stinger pipe was placed in each well, which extended to approximately 5 feet below the initial
oil/water interface or static water level. The event was conducted for approximately eight hours
from 8:30 am to 4:30 pm.
Free Product Recovery Report
In and Out
Pilot Project G-5624.7
November 23, 2022
4
The average pumping rate over the course of this AFVR event was estimated to be approximately
0.29 gallons per minute. The total amount of product/groundwater recovered was estimated to
be 45 gallons, with approximately 1 gallon of which appeared to be free phase petroleum product
floating in the tank. The average vacuum during the event was 21 inches of Hg.
During the course of the event Pilot and EVO measured a series of exhaust parameters including:
temperature; velocity; relative humidity; and photoionization (PID) measurements at
approximate half hour intervals in order to estimate the total amount of product recovered and
ultimately discharged as exhaust emissions. Based on the data collected and calculations,
approximately 562.49 pounds of total VOC emissions were generated during this event.
Approximately 90.85 gallons of gasoline were removed as liquid and emissions as a result of this
AFVR event. The recorded measurements and calculation are included in Tables 4 through 7.
4.0 CONCLUSIONS
A total of 45 gallons of liquids were extracted from monitoring wells MW-1, MW-3 and MW-4
during the AFVR event with approximately 1 gallon of which appeared to be free phase petroleum
product. Based on the data collected and calculations, approximately 562.49 pounds of total
VOC emissions were generated during this event. Approximately 90.85 gallons of gasoline were
removed as liquid and emissions a result of this AFVR event.
5.0 RECOMMENDATIONS
Pilot recommends that the current property owner/responsible party submit a copy of this Free
Product Recovery Report to the NCDEQ, UST Section for their review.
6.0 QUALIFICATIONS OF REPORT
The activities and evaluative approaches used in this assessment are consistent with those
normally employed in remediation projects of this type. Our evaluation of site conditions has
been based on our understanding of the site project information and the data obtained during
our field activities.
DRAWINGS
SITE
USGS Topographic Map
226 South NC HWY 705
Robbins, Moore County, NC
Pilot Project G-5624.7
Drawing 1
USGS Topographic Map
Robbins, NC Quadrangle
Scale: 1” = 2,000’
LEGEND
Site Boundary
Site Map
226 South NC HWY 705
Robbins, Moore County, NC
Pilot Project G-5624.7
Drawing 2
Google Earth
Interactive Mapping Software
Scale : 1”= 60’
LEGEND
Site BoundaryU. UST SystemA. AST SystemG. Gas Station
U
A
G
UST Location Map
226 South NC HWY 705
Robbins, Moore County, NC
Pilot Project G-5624.7
Drawing 3
Google Earth
Interactive Mapping Software
Scale : 1”= 10’
LEGEND
Approximate Monitoring Well Location
Approximate Former UST Location
Approximate Extent
of the Impacted Soil
Excavation
MW-1
MW-4
MW-2
MW-3
DW-1
TABLES
UST ID NumberOwner Last ContentsPrevious ContentsCapacity (in Gallons)Construction DetailsTank DimensionsInstallation DateStatus ReleaseTable 1 - UST InformationIn and OutRobbins, North Carolina1Big Cedar Creek Properties, LLC 605 George P Road Robbins, North Carolina 27325Gasoline Gasoline 8,000 Single Wall Steel 96" x 255" 5/1/1982 Removed Yes2Gasoline Gasoline 8,000 Single Wall Steel 96" x 255" 5/1/1982YesRemoved Yes96" x 255" 5/1/1982 Removed3Gasoline Gasoline 8,000 Single Wall Steel
Monitoring Well IDDate Installed TOC Elevation (feet)Static Water Level (feet below TOC) 8/11/22Relative Groundwater Elevation Total DepthScreened Interval (feet)Sand IntervalBentonite Interval*MW-1 5/26/2020 100.00 20.53 79.47 35 15-35 13-35 4-13MW-2 8/6/2020 99.32 20.80 78.52 35 15-35 13-35 11-13**MW-3 8/5/2020 97.63 20.11 77.91 35 15-35 13-35 11-13MW-4 8/5/2020 96.40 19.22 77.18 35 15-35 13-35 11-13MW-5 2/8/2021 97.71 11.31 86.40 30 10-30 8-30 6-8MW-6 2/8/2021 97.14 17.75 79.39 30 15-30 13-30 11-13MW-7 2/8/2021 95.76 21.01 74.75 30 10-30 8-30 6-8DW-1 8/5-6/2021 98.91 19.56 79.35 55 50-55 48-55 46-48Table 2 - Monitoring Well Construction InformationIn and OutRobbins, North Carolina*MW-1 was utilized as an arbitrary benchmark**If free product is present the groundwater elevation is calculated by (TOC Elevation - Static) + (free product thickness x 0.8581)
504.1Sample IDApproximate Water Level (ft. BGS)Groundwater Elevation (ft.) Sample Collection DateBenzenen-ButylbenzeneEthylbenzeneIsopropylether (IPE, Diisopropyl ether)I-Propylbenzene (Isopropylbenzene)Methylene ChlordieMTBENaphthaleneN-Propylbenzenep-IsopropyltolueneToluene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneTotal XylenesTert-amyl AlcoholEDBLeadC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics17.15 83.62 5/28/20206,140BQL2,050 124 92.8BQL444 220 234 22.0 21,300 1,720 401 11,680 3,150BQL BQL56,200 44,700 9,23020.70 79.30 12/1/20219,970ND2,310 144ND ND ND ND311ND29,500 1,680 350 12,090ND NA NA NA NA NA20.53 79.47 8/11/20228,610ND2,560ND127ND ND ND311ND26,200 2,340 501 14,710NA NA NA NA NA NA24.91 74.41 8/7/202035.1BQL39.4BQL BQL BQL BQL12.9 9.34 1.06 111 61.4 20.1 295NA BQL9.02 509 595 1,62020.06 79.26 12/1/20210.62ND0.57ND ND ND ND ND ND ND0.99 1.3 0.61 5.0ND NA NA NA NA NA20.80 78.52 8/11/2022 ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA NA NA NA NA NA22.45 75.18 8/7/202010,200BQL2,840 2083.97 BQL352 268BQL37,900 2,080 465 15,000NA BQL6.23 156,000 61,800 11,80019.93 77.97 12/1/202120.11 77.91 8/11/202227.65 68.75 8/7/20207,380BQL2,020 180BQL BQL BQL252 192BQL27,500 1,670 342 11,900NA BQL BQL115,000 45,800 9,10020.04 76.36 12/1/20213,460ND416 57.5 41.0ND176 122 61.3ND846 718 159 2,158ND NA NA NA NA NA19.22 77.18 8/11/20223,300ND748 44.6 49.3ND161 246 82.4ND2,210 884 197 4,740NA NA NA NA NA NA6.99 90.72 2/9/20210.53ND ND ND ND BQL0.57ND ND ND1.4 0.54ND ND ND ND30.7ND ND ND12.93 84.78 12/1/20213.2ND ND ND ND ND4.1ND ND ND1.4 0.81ND ND ND NA NA NA NA NA11.31 86.40 8/11/20221.2ND ND ND ND ND2.8 2.5ND ND1.4 0.64ND ND NA NA NA NA NA NA15.02 82.12 2/9/202162.6ND22.7ND ND BQL23.8 32.8ND ND221 18.5ND122.1ND ND488 982 557 15221.53 75.61 12/1/202192.62.155.62 5 ND48.3 39.110 ND200 74.817206.0ND NANA NA NA NA17.75 79.39 8/11/202228.9ND29.4ND4.1ND23.1 16.3 9.7ND64.1 57.7 13.6 111.8NA NA NA NA NA NA29.29 66.47 2/9/20211,080ND440ND ND BQL42.1 133ND ND4,220 243ND2,639ND ND ND17,700 11,000ND20.46 75.30 12/1/20211,160ND38017 30 ND34.9 14262 ND1,540 7881644,610ND NA NANA NANA21.01 74.75 8/11/20221,360ND419 16.0 30.5ND32.0 145 57.3ND722 773 177 4,090NA NA NA NA NA NA16.08 82.83 8/7/20202,710BQL373 89.0 37.0BQL823 66.5 43.0BQL4,370 329 73.5 2,380NA BQL BQL24,300 8,340 2,09018.85 80.06 12/1/20216,080ND931 110.0 50.9ND864 ND 95.2ND11,900 776 124.0 5,730ND NA NANA NA NA19.56 79.35 8/11/20226,590ND1,100 92.0 63.3 209 519 333ND ND12,900 946ND6,410NA NA NA NA NA NA1 70 600 70 70 5 20 6 70 25 600 400 400 500 40 0.02 15 400 700 2005,000 5,900 80,000 70,000 30,500 5,000 20,000 6,000 26,100 11,700 260,000 28,500 24,100 50,000 40,000 50 15,000 NS NS NS= Concentration Exceeds the 2L Standard= Concentration Exceeds the GCLsppb = Parts Per BillionBGS = Below Ground SurfaceN/A = Not ApplicableNS = No StandardNA = Not AnalyzedBQL = Below Quantitation LimitsND = Not DetectedFP - 0.46'MW-6MW-1MW-2MW-3MW-4MW-5FP - 0.31'Table 3 - Summary of Groundwater Analytical ResultsIn and OutRobbins, North CarolinaTargeted CompoundsVPH 6200BMW-7DW-1NC 2L Standard (ppb)GCLs (ppb)Standard
MW-1 Gasoline AFVR 0.00 0.00MW-3 Gasoline AFVR 0.73 0.00MW-4 Gasoline AFVR 0.00 0.00* Bailing, Skimming, Aggressive Fluid Vapor Recovery, Mobile Multiphase Extraction, etc.The calcuation assumes one gallon of gasoline is 6.26 pounds.~1 $3,012.7589.8511/10/202245Table 4 - Summary of Aggressive Fluid Vapor RecoveryIn and OutRobbins, North CarolinaCost of EventDate Well ID #Product Type (gasoline, diesel, etc.)NAPL Recovery Method*Product Thickness before Recovery (feet)Product Thickness after Recovery (feet)Amount of Vaporized Product (gallons)Amount of Liquid (Water + Product) (gallons)Amount of Liquid Product (gallons)
Date of Recovery Event (m/dd/yy)Total Volume (LNAPL as Liquid and Vapor) Recovered from Site During Current Recovery Event (gallons)Cumulative Total LNAPL Volume Recovered to Date from All Recovery Events (gallons) 5/27/2022 8.67 8.6711/10/2022 90.85 99.52Table 5 - Cummulative Volume of LNAPL RecoveredIn and OutRobbins, North Carolina
11/10/2022 8:30 MW-1, 3, 4 24 43 6 62.2 100 0.0122 16.1051880511/10/2022 9:00 MW-1, 3, 4 24 151 6 123 100 0.0907 46.6316490611/10/2022 9:30 MW-1, 3, 4 20 159 6 164 100 0.3510 32.7432980811/10/2022 10:00 MW-1, 3, 4 19 237 6 173 100 0.4971 37.2813355511/10/2022 10:30 MW-1, 3, 4 19 251 6 173 100 0.4971 39.4836085311/10/2022 11:00 MW-1, 3, 4 20 363 6 175 100 0.5401 52.0548859811/10/2022 11:30 MW-1, 3, 4 20 198 6 176 100 0.5638 26.8880264211/10/2022 12:00 MW-1, 3, 4 20 198 6 172 100 0.4772 32.430144311/10/2022 12:30 MW-1, 3, 4 21 258 6 158 100 0.2832 59.2508271811/10/2022 13:00 MW-1, 3, 4 22 138 6 142 100 0.1648 37.9086458511/10/2022 13:30 MW-1, 3, 4 21 189 6 153 100 0.2384 46.4936300211/10/2022 14:00 MW-1, 3, 4 21 215 6 154 100 0.2465 52.2418485311/10/2022 14:30 MW-1, 3, 4 21 176 6 154 100 0.2465 42.765420211/10/2022 15:00 MW-1, 3, 4 22 159 6 154 100 0.2465 38.6346693811/10/2022 15:30 MW-1, 3, 4 22 366 6 154 100 0.2465 88.9326351811/10/2022 16:00 MW-1, 3, 4 21 103 6 154 100 0.2465 25.0274902311/10/2022 16:30 MW-1, 3, 4 21 177 6 152 100 0.2305 44.06519118Averages -- -- 21.05882353 198.8823529 -- 152.5411765 100 0.3046 42.29049963Water Vapor % (Humidty Ratio)Qstd (flow)Table 6 - Aggressive Fluid Vapor Recovery DataIn and OutRobbins, North CarolinaDate Time (24 hr)Vacuum (Inches of Hg)Velocity (ft/min)Exhaust Pipe ID (in)Temp (F) Relative Humidity (%)Monitoring Wells Utilized
0 16.10518805 5,000 1 5,000 26,589.13 0.00165996 74.22 0.0030 46.63164906 5,000 1 5,000 26,589.13 0.00165996 74.22 37.1160 32.74329808 5,000 1 5,000 26,589.13 0.00165996 74.22 37.1190 37.28133555 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11120 39.48360853 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11150 52.05488598 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11180 26.88802642 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11210 32.4301443 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11240 59.25082718 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11270 37.90864585 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11300 46.49363002 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11330 52.24184853 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11360 42.7654202 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11390 38.63466938 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11420 88.93263518 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11450 25.02749023 790 1 790 4,201.08 0.000262274 11.73 5.86480 44.06519118 5,000 1 5,000 26,589.13 0.00165996 74.22 37.11Averages 42.29049963 4,752 1 4,752 25,272.18 0.001577743 70.54 33.09562.49Notes:K = Number of carbons in the calibration gas: (methane K = 1, Propane K = 3, or Hexane K= 6) PPMg = PPMv, Volumetric concentration as gasoline emission, dry basis at STPCg:m + mg/dsm3, mass concentration of gasoline emission, dry basis at STPMg = 128 mg/mg-mole, molecular weight of gasoline (this value may vary depending on contaminant)K3 = 24.07 dsm3/1E+6 mg-mole, mass to volume conversion factor at STPCg = lb/dcsf, mass concentration of gasoline emission, dry basis at STPPMRg = lb/hr, pollutant mass removal rate of gasoline emissionPMR = pollutant mass removal of gasoline emission over timeEquations:PPMg = PPM measured * KCg:m = PPMg * (Mg/K3)Cg = Cg:m * 62.43E-09 lb-m3/mg-ft3PMRg = Cg * Qstd * 60 min/hrPMR = PMRg * ((T2 - T1) / 60)Total Emissions (lbs)PMRg (lb/hr)PMR (lb)Table 7 - Emission CalculationsIn and OutRobbins, North CarolinaElapsed Time (min)Qstd (flow)PID Reading (ppm)K (#C-gas)PPMgCg:m (mg/dsm3)Cg (lb/dscf)
APPENDIX