ASSESSMENT OF LFG VERTICAL MIGRATION OTTAWA LANDFILL WASTE...
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ASSESSMENT OF LFG VERTICAL MIGRATION OTTAWA LANDFILL WASTE MANAGEMENT TECHNICAL REPORT – SURVEY APRIL 2008 PROJECT N o Q111931 GENIVAR 2500 Jean-Perrin Street, suite 204 Quebec (Quebec) G2C 1X1 Phone : (418) 845-8885 Fax : (418) 845-5559 Document prepared by Marlène Demers, eng. Member OIQ number : 115373 And approved by Catherine Verrault, M.Sc., M.A.Sc. Quebec, May 29 th , 2008
Transcript of ASSESSMENT OF LFG VERTICAL MIGRATION OTTAWA LANDFILL WASTE...
ASSESSMENT OF LFG VERTICAL MIGRATION
OTTAWA LANDFILL
WASTE MANAGEMENT
TECHNICAL REPORT – SURVEY APRIL 2008
PROJECT No Q111931
GENIVAR 2500 Jean-Perrin Street, suite 204 Quebec (Quebec) G2C 1X1 Phone : (418) 845-8885 Fax : (418) 845-5559 Document prepared by Marlène Demers, eng.
Member OIQ number : 115373
And approved by Catherine Verrault, M.Sc., M.A.Sc.
Quebec, May 29th, 2008
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR i Q111931
TABLE OF CONTENT
Page
TABLE OF CONTENT ................................................................................................................... i LIST OF TABLES........................................................................................................................... ii LIST OF FIGURES ........................................................................................................................ ii LIST OF APPENDIX...................................................................................................................... ii
1. INTRODUCTION...............................................................................................................1
2. METHODOLOGY ..............................................................................................................2 2.1 Location of measurements .....................................................................................2 2.2 Methodology ..........................................................................................................2
2.2.1 Instrumentation ........................................................................................2 2.2.2 Instrument calibration ..............................................................................3 2.2.3 Meteorological constraints........................................................................3
3. RESULTS.............................................................................................................................6 3.1 Regulations .............................................................................................................6 3.2 Surface sampling results .........................................................................................6 3.3 Site configuration and well performance .............................................................18 3.4 Works since previous assessment.........................................................................18 3.5 Wind speed ..........................................................................................................18
4. INTERPRETATION OF RESULTS......................................................................................19
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR ii Q111931
LIST OF TABLES
Page
TABLE 3-1 : POINTS HAVING A METHANE CONCENTRATION HIGHER THAN 500 PPMV - APRIL 2008 ...........................................................................................................8
TABLE 3-2: POINTS HAVING A METHANE CONCENTRATION HIGHER THAN 500 PPMV - NOVEMBER 2007.................................................................................................9
LIST OF FIGURES
Page
FIGURE 2-1 : LOCATION OF MEASUREMENT POINTS – LANDFILL – APRIL 2008 ...............4 FIGURE 2-2 : LOCATION OF MEASUREMENT POINTS – CARP ROAD – APRIL 2008 ...........5 FIGURE 3-1 : METHANE CONCENTRATIONS – LANDFILL – APRIL 2008.............................12 FIGURE 3-2 : METHANE CONCENTRATIONS – LANDFILL – NOVEMBER 2007 ..................13 FIGURE 3-3 : ISO-CONTOURS OF METHANE CONCENTRATIONS – LANDFILL - APRIL
2008 ...................................................................................................................................14 FIGURE 3-4 : ISO-CONTOURS OF METHANE CONCENTRATIONS – LANDFILL –
NOVEMBER 2007 ..............................................................................................................15 FIGURE 3-5 : METHANE CONCENTRATIONS CARP ROAD - APRIL 2008............................16 FIGURE 3-6 : METHANE CONCENTRATIONS CARP ROAD – NOVEMBER 2007.................17
LIST OF APPENDIX
APPENDIX 1 Statistical report
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 1 Q111931
1. INTRODUCTION
Waste Management of Canada Corp. has given a mandate to GENIVAR for the
assessment of methane emission at the surface of Ottawa landfill.
According to the offer for professional services, the following tasks were performed:
Measurement on a continuous basis of the methane concentrations in the
ambient air above the surface of the landfill site with the FID-GPS technology
developed by the firm GENIVAR ;
Data processing and mapping of results ;
Technical report editing.
Field work was performed by Mr. Alexandre Monette and Mr. Marc Bisson of
GENIVAR on April 30th and May 1st 2008.
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 2 Q111931
2. METHODOLOGY
2.1 Location of measurements
Assessment of vertical migration of LFG was performed above the entire landfill.
Location of the measurement points is shown on Figure 2-1.
This assessment was also performed above the LFG air sparging system trench (2 lines
of 1 km long at a height of approximately 6 inches above ground). Location of the
measurement points is shown on figure 2-2.
2.2 Methodology
Methane concentrations above ground are measured and recorded on a continuous
basis with a portable Flame Ionisation Detector (FID). Spatial location of the
measurement points are defined and recorded by a Global Positioning System (GPS).
According to the EPA procedure, the sampling is done along the periphery of the
waste cells and along a serpentine pattern spaced about 30 meters apart, at a height
of approximately 6 inches above ground.
Methane concentrations are then processed and spatial coordinates are transformed
from the degree, minute, second format to the NAD83MTM Zone 9 system. A map
showing iso-contours of methane concentration is prepared. The iso-contours are
overlaid on a map showing the landfill gas collection system general arrangement in
order to be able to evaluate its efficiency and to identify areas where modifications
are required to reduce emissions to the atmosphere.
2.2.1 Instrumentation
Methane concentrations are determined with a Thermo Environmental Instruments
TVA 1000B portable analyser by the flame ionisation method. This instrument is used
for the measurements into ambient air of small concentrations of total volatile organic
compounds, expressed as methane. The analytical range of the analyser is 0 to 50
000 ppmv with a lower detection limit at 0,5 ppmv.
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 3 Q111931
Since the concentration of methane in landfill gas is more than 100 times higher than
non methane organic compounds and that the measured concentrations are low, the
result given by the instrument is interpreted as methane alone.
Spatial co-ordinates are measured by a Garmin GPS which in DGPS mode has an
accuracy of less than 1 meter.
Wind speed is checked regularly during sampling with a portable anemometer.
2.2.2 Instrument calibration
Accuracy of the analytical instrument is verified on a regular basis with calibration gas
having a known composition. Adjustments are made if required. For the TVA
1000B, the calibration gases are composed of:
100 ppmv of CH4 in air; 10 000 ppmv of CH4 in air.
2.2.3 Meteorological constraints
Average wind speed during sampling shouldn't exceed 8 km/hr with maximum peak
speed at 20 km/hr.
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 2-1
LOCATION OF MEASUREMENT POINTS
APRIL, 2008
LEGEND
ACTIV
EAREA
345800 346000 346200 346400 346600 346800 347000
5015200
5015400
5015600
5015800
5016000
5016200
GAS EXTRACTION WELL
MEASUREMENT POINTS
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1
Tél.: (418) 845-8885 Téléc.: (418) 845-5559
CARP ROAD
FLARE
SCALE & OFFICE
BUILDING
HIGHWAY 417
LANDFILL
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 2-2LOCATION OF MEASUREMENT
POINTS
APRIL, 2008
MEASUREMENT POINTS
LEGEND
FENCE
EXISTING FENCE
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1Tél.: (418) 845-8885 Téléc.: (418) 845-5559
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 6 Q111931
3. RESULTS
3.1 Regulations
In Ontario, owners of landfill sites need an approval if their facilities “may discharge
or from which may be discharged a contaminant into any part of the natural
environment other than water » (Environmental Protection Act, R.S.O. 1990,
CHAPTER E.19, part II General Provisions, section 9 Approval of Director, plant or
production process). However, no specific maximum acceptable concentration of
methane above the surface is defined.
Under item No. 4 of Provincial Officer’s Order No. 5830-6Z2PPW, WM is required
to perform landfill gas emission surveys at the Ottawa landfill site in April, June,
August and October 2008. Each report shall include also the survey results of the
previous campaign and describe any actions related to the LFG collection and flaring
system taken since the last survey.
US EPA has enacted operational standards in "Standards of Performance for New
Stationary Sources and Guidelines for Control of Existing Sources: Municipal Solid
Waste Landfills", into effect since March 12th, 1996 (40 CFR Parts 51, 52 and 60).
This rule stipulates that methane concentrations measured at the surface of the
landfill shall be less than 500 ppmv. EPA methodology and standard will be used for
the assessment of methane emissions to the atmosphere at the Ottawa landfill.
3.2 Surface sampling results
Results show that there are 19 points (0,44%) having a methane concentration above
500 ppmv compared to 3,21% of the points for the previous survey. Table 3-1
presents the location of those points together with their concentration and table 3-2
presents the results of November 2007 survey.
Figure 3-1 presents the detailed results for this survey and figure 3-2 for November
2007. Iso-contour map of methane concentrations is shown on figure 3-3 for this
sampling campaign and figure 3-4 for November 2007. The highest concentration
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 7 Q111931
recorded in the present survey is 951 ppmv at (346 709, 5 015 785) which is located
south of well 4.
Figure 3-5 presents the methane concentrations obtained above the LFG air sparging
system located along Carp Road for this survey and figure 3-6 for November 2007.
No methane concentration higher than 500 ppmv was measured in April 2008.
X Y CH 4 (ppmv)346709 5015785 951346593 5015729 787346591 5015728 737346062 5015340 703346264 5015538 613346426 5015764 613346052 5015332 603346244 5015603 603346596 5015731 599346435 5015919 588346293 5015478 562346530 5015622 553346514 5015919 553346055 5015334 542346244 5015604 542346056 5015336 538346043 5015575 523346043 5015575 520346776 5015849 519
Table 3-1 : Points having a methane concentration higher than 500 ppmv April 2008
X Y CH 4 (ppmv)346636 5015725 4898346336 5015724 4019346656 5015741 3668346052 5015420 3555346566 5015662 3546346570 5015666 3354346530 5015952 3269346568 5015664 3086346508 5015592 3058346142 5015548 2768346337 5015722 2680346574 5015670 2477346713 5015794 2469346401 5015511 2466346420 5015481 2370346629 5016041 2227346572 5015668 2165346353 5015708 2054346181 5015649 2048346149 5015392 1877346328 5015506 1861346328 5015722 1833346414 5015473 1758346507 5015930 1691346529 5015623 1648346225 5015298 1354346388 5015741 1336346431 5015666 1272346179 5015647 1250346040 5015377 1221346409 5015468 1198346543 5015638 1187346241 5015651 1187346698 5015780 1169346052 5015531 1128346779 5016054 1104346708 5015786 1099346245 5015601 1096346279 5015462 1027346778 5015854 1024346429 5015669 1016346070 5015439 1013346326 5015724 1009346534 5015957 981346415 5015475 980
Table 3-2 : Points having a methane concentration higher than 500 ppmv November 2007
X Y CH 4 (ppmv)
Table 3-2 : Points having a methane concentration higher than 500 ppmv November 2007
346407 5015466 976346324 5015727 961346720 5015800 956346049 5015417 948346711 5015792 933346331 5015730 887346106 5015241 883346767 5015843 871346156 5015343 866346576 5015672 861346323 5015441 849346701 5015782 836346739 5016105 829346532 5015954 824346525 5015947 820346417 5015477 819346337 5015715 818346258 5015613 814346400 5015892 794346390 5015744 791346753 5016091 784346552 5015645 776346540 5015961 754346425 5015818 751346736 5016104 741346197 5015383 733346631 5016044 713346474 5015524 709346422 5015818 694346399 5015509 684346479 5015579 676346330 5015721 665346250 5015606 663346357 5015423 659346599 5015692 651346537 5015633 649346032 5015267 641346116 5015198 632346776 5015853 626346333 5015685 609346789 5016044 601346202 5015667 598346501 5015599 596346418 5015480 594346478 5015625 588
X Y CH 4 (ppmv)
Table 3-2 : Points having a methane concentration higher than 500 ppmv November 2007
346030 5015403 583346527 5015949 578345895 5015432 575346718 5015797 571346468 5015897 571346335 5015725 571346255 5015328 571346053 5015302 566346520 5015942 565346080 5015266 563346658 5015744 561346194 5015380 558346564 5015988 555346471 5015522 555346594 5015688 554346240 5015426 543346750 5016097 541346334 5015716 536346758 5015835 533346696 5015778 533346477 5015625 533346475 5015626 533346405 5015464 533346511 5015589 532346553 5015648 531346536 5015959 530346539 5015634 529346515 5015938 529346519 5015574 525346642 5016056 519346242 5015599 519345955 5015439 513346390 5015886 510346761 5015837 509346068 5015545 507346212 5015675 505
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 3-1
METHANE CONCENTRATIONSLANDFILL
APRIL, 2008
LEGEND
ACTIV
EAREA
0 à 50 ppmv
50 à 100 ppmv
100 à 500 ppmv
500 à 50000 ppmv
345800 346000 346200 346400 346600 346800 347000
5015200
5015400
5015600
5015800
5016000
5016200
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1
Tél.: (418) 845-8885 Téléc.: (418) 845-5559
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 3-2METHANE CONCENTRATIONS
LANDFILL
NOVEMBER, 2007
LEGEND
ACTIVEAREA
0 à 50 ppmv 50 à 100 ppmv 100 à 500 ppmv 500 à 50000 ppmv
345800 346000 346200 346400 346600 346800 347000
5015200
5015400
5015600
5015800
5016000
5016200
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1Tél.: (418) 845-8885 Téléc.: (418) 845-5559
111
110
109
107
108
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 3-3
ISO-CONTOURS OFMETHANE CONCENTRATIONS
APRIL, 2008
LEGEND
ACTIV
EAREA
0 ppmv
25 ppmv
50 ppmv
100 ppmv
250 ppmv
500 ppmv
1000 ppmv
10000 ppmv
345800 346000 346200 346400 346600 346800 347000
5015200
5015400
5015600
5015800
5016000
5016200
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1
Tél.: (418) 845-8885 Téléc.: (418) 845-5559
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 3-4ISO-CONTOURS OF
METHANE CONCENTRATIONS
NOVEMBER, 2007
LEGEND
ACTIVEAREA
0 ppmv
25 ppmv
50 ppmv
100 ppmv
250 ppmv
500 ppmv
1000 ppmv
10000 ppmv
345800 346000 346200 346400 346600 346800 347000
5015200
5015400
5015600
5015800
5016000
5016200
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1Tél.: (418) 845-8885 Téléc.: (418) 845-5559
111
110
109
107
108
346700 346800 346900 347000 347100 347200 347300 347400 347500
5015600
5015700
5015800
5015900
5016000
5016100
5016200
5016300
CARP ROAD
FLARE
SCALE & OFFICE
BUILDING
HIGHWAY 417
LANDFILL
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 3-5METHANE CONCENTRATIONS
CARP ROAD
APRIL, 2008
LEGEND
FENCE
EXISTING FENCE
0 to 50 ppmv 50 to 100 ppmv 100 to 500 ppmv 500 to 50000 ppmv
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1Tél.: (418) 845-8885 Téléc.: (418) 845-5559
346700 346800 346900 347000 347100 347200 347300 347400 347500
5015600
5015700
5015800
5015900
5016000
5016100
5016200
5016300
CARP ROAD
FLARE
SCALE & OFFICE
BUILDING
HIGHWAY 417
LANDFILL
LANDFILL GAS EMISSIONWASTE MANAGEMENT
OTTAWA LANDFILL
GPS/FID MEASUREMENT
FIGURE 3-6METHANE CONCENTRATIONS
CARP ROAD
NOVEMBER, 2007
LEGEND
FENCE
EXISTING FENCE
0 to 50 ppmv 50 to 100 ppmv 100 to 500 ppmv 500 to 50000 ppmv
2500, rue Jean-Perrin, bur. 204 Québec (QC) G2C 1X1Tél.: (418) 845-8885 Téléc.: (418) 845-5559
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 18 Q111931
3.3 Site configuration and well performance
As of May 2008, the landfill gas collection system at Ottawa landfill is composed of
125 vertical extraction wells. All these wells are connected to two (2) pumping and
flaring stations via a 450 mm header located at the bottom of the slopes.
3.4 Works since previous assessment
A total of 22 wells were installed by Waste Management between December 2007
and April 2008 :
18 new wells were installed (GW 107, 108, 109, 110, 111, 112, 113, 114,
115, 116, 117, 118, 119, 120, 121, 122, 127 and 128) ;
4 wells were redrilled (GW 37, 49, 50 and 57).
3.5 Wind speed
Sampling was done when the winds were under specifications described at 2.2.3.
Due to weather conditions, work could not be carried out before the end of April
2008. During the sampling campaign, the wind velocity was between 0 and 8,0
km/hr.
Landfill gas emission surface sampling Ottawa Landfill
GENIVAR 19 Q111931
4. INTERPRETATION OF RESULTS
April results indicate an improvement of the LFG collection system efficiency when
compared to November 2007. Globally, the emissions of methane to the
atmosphere are low except for a few disseminated high spots, mainly :
1) Along the south slope, between wells 6 and 7 ;
2) Near of well 27.
No high value was recorded above the air purging system near Carp road.
The integrity of the soil cover should be checked and modified if required and the
vacuum increased at the wells located in the area of the high spots.
APPENDIX I
STATISTICAL REPORT
—————————— Gridding Report —————————— Mon Jun 02 16:22:17 2008 Elasped time for gridding: 0.08 seconds Data Source Source Data File Name: R:\GENIVAR\Q111931 (Biogaz-Relevé surface West Carleton)\Relevés de surface\Rapport 2008\Avril 2008\Données terrain\Copie de FIDGPS_Site_Final _sans chemin.xls X Column: D Y Column: E Z Column: F Data Counts Active Data: 4321 Original Data: 4986 Excluded Data: 0 Deleted Duplicates: 665 Retained Duplicates: 326 Artificial Data: 0 Superseded Data: 0 Univariate Statistics ———————————————————————————————————————————— X Y Z ———————————————————————————————————————————— Minimum: 345871 5015171 0 25%-tile: 346173 5015464 5.14 Median: 346376 5015665 13.86 75%-tile: 346601 5015867 30.1 Maximum: 346917 5016143 951 Midrange: 346394 5015657 475.5 Range: 1046 972 951 Interquartile Range: 428 403 24.96 Median Abs. Deviation: 214 201 10.41 Mean: 346386.351539 5015666.01458 29.158592918306 Trim Mean (10%): 346385.66520957 5015665.8464901 20.362692208794 Standard Deviation: 258.8165172252 244.09908702489 58.360513335154 Variance: 66985.989588583 59584.364286383 3405.9495167426 Coef. of Variation: 2.0014859255611 Coef. of Skewness: 6.80902994201
———————————————————————————————————————————— Inter-Variable Correlation ———————————————————————————— X Y Z ———————————————————————————— X: 1.000 0.839 -0.001 Y: 1.000 -0.047 Z: 1.000 ———————————————————————————— Inter-Variable Covariance ———————————————————————————————— X Y Z ———————————————————————————————— X: 66985.989588583 52991.426719056 -22.500965666028 Y: 59584.364286383 -662.45222433553 Z: 3405.9495167426 ———————————————————————————————— Planar Regression: Z = AX+BY+C Fitted Parameters ———————————————————————————————————————————— A B C ———————————————————————————————————————————— Parameter Value: 0.032368829904504 -0.041463763497301 196785.42713195 Standard Error: 0.0066914246836331 0.0070948835567656 33665.087590502 ———————————————————————————————————————————— Inter-Parameter Correlations ———————————————————————————— A B C ———————————————————————————— A: 1.000 0.839 0.818 B: 1.000 0.999 C: 1.000 ———————————————————————————— ANOVA Table ———————————————————————————————————————————— Source df Sum of Squares Mean Square F ———————————————————————————————————————————— Regression: 2 115544.01579387 57772.007896934 17.084 Residual: 4318 14601563.846051 3381.5571667557 Total: 4320 14717107.861845 ———————————————————————————————————————————— Coefficient of Multiple Determination (R^2): 0.0078510001338933
Nearest Neighbor Statistics ————————————————————————————————— Separation |Delta Z| ————————————————————————————————— Minimum: 1 0 25%-tile: 2.8284271247462 0.73 Median: 2.8284271247462 2.94 75%-tile: 3.605551275464 11.14 Maximum: 5.3851648071345 785 Midrange: 3.1925824035673 392.5 Range: 4.3851648071345 785 Interquartile Range: 0.7771241507178 10.41 Median Abs. Deviation: 0.33385053542219 2.69 Mean: 2.8593070723303 14.642351307568 Trim Mean (10%): 2.9024633266859 8.0148238621754 Standard Deviation: 0.7252947606778 42.919759019649 Variance: 0.52605248986667 1842.1057143047 Coef. of Variation: 0.25366102427281 2.9312067521195 Coef. of Skewness: -0.87510094326908 8.2463526349973 Root Mean Square: 2.9498626109947 45.348695307792 Mean Square: 8.7016894237445 2056.504166119 ————————————————————————————————— Complete Spatial Randomness Lambda: 0.0042499744273698 Clark and Evans: 0.37280690925165 Skellam: 1004.0469706105 Exclusion Filtering Exclusion Filter String: Not In Use Duplicate Filtering Duplicate Points to Keep: Maximum Z X Duplicate Tolerance: 0.00012 Y Duplicate Tolerance: 0.00011 Deleted Duplicates: 665 Retained Duplicates: 326 Artificial Data: 0 ———————————————————————————————————————————— X Y Z ID Status ———————————————————————————————————————————— 345899 5015438 305 1172 Retained
345899 5015438 81.17 1173 Deleted 345900 5015439 27.36 1184 Retained 345900 5015439 23.68 1185 Deleted 345900 5015439 20.63 1186 Deleted 345900 5015439 15.92 1188 Deleted 345907 5015444 18.08 1213 Retained 345907 5015444 7.48 1217 Deleted 345907 5015444 5.59 1219 Deleted 345907 5015444 3.8 1220 Deleted 345907 5015445 48.55 1221 Retained 345907 5015445 13 1223 Deleted 345969 5015474 2.86 1407 Retained 345969 5015474 1.3 1409 Deleted 345970 5015473 1.18 1400 Retained 345970 5015473 0.99 1401 Deleted 345970 5015473 0.54 1402 Deleted 345995 5015338 4.38 570 Retained 345995 5015338 1.65 571 Deleted 345996 5015339 8.98 582 Retained 345996 5015339 8.53 583 Deleted 345996 5015339 4.98 586 Deleted 345996 5015339 1.94 587 Deleted 345996 5015339 1.55 588 Deleted 345996 5015339 1.46 589 Deleted 345996 5015339 1.41 591 Deleted 345996 5015339 1.35 592 Deleted 345996 5015339 1.26 593 Deleted 345996 5015339 1.25 594 Deleted 345996 5015339 1.22 595 Deleted 345996 5015339 1.12 596 Deleted 345996 5015339 1.1 597 Deleted 346000 5015408 18.03 988 Retained 346000 5015408 17.73 989 Deleted 346000 5015408 16.8 990 Deleted 346001 5015401 57.89 915 Retained 346001 5015401 50.68 916 Deleted 346001 5015401 49.21 917 Deleted 346001 5015401 45.17 918 Deleted 346001 5015401 43.26 919 Deleted 346001 5015401 41.97 920 Deleted 346001 5015401 35.17 921 Deleted 346001 5015401 32.74 922 Deleted 346001 5015401 27.9 923 Deleted 346001 5015401 23.7 924 Deleted 346001 5015401 7.57 929 Deleted 346001 5015402 17.5 934 Retained
346001 5015402 15.95 935 Deleted 346001 5015402 13.93 936 Deleted 346001 5015408 9.19 994 Retained 346001 5015408 5.52 997 Deleted 346001 5015408 3.35 999 Deleted 346016 5015368 4.23 750 Retained 346016 5015368 3.79 753 Deleted 346016 5015368 3.18 755 Deleted 346017 5015367 4.95 734 Retained 346017 5015367 4.65 735 Deleted 346017 5015367 3.94 738 Deleted 346017 5015367 3.68 740 Deleted 346017 5015368 4.76 747 Retained 346017 5015368 4.35 748 Deleted 346017 5015368 4.23 751 Deleted 346018 5015367 4.49 736 Retained 346018 5015367 4.35 737 Deleted 346018 5015367 3.86 739 Deleted 346018 5015367 2.2 742 Deleted 346018 5015368 4.28 749 Retained 346018 5015368 4.23 752 Deleted 346018 5015368 3.29 754 Deleted 346023 5015316 43.92 459 Retained 346023 5015316 16.88 460 Deleted 346025 5015260 21.96 185 Retained 346025 5015260 15.58 186 Deleted 346028 5015254 44.19 165 Retained 346028 5015254 21.59 167 Deleted 346038 5015320 289 477 Retained 346038 5015320 287 478 Deleted 346038 5015320 257 479 Deleted 346038 5015320 56.24 480 Deleted 346038 5015320 48.29 481 Deleted 346038 5015320 25.93 482 Deleted 346039 5015321 261 485 Retained 346039 5015321 10.63 489 Deleted 346042 5015279 8.75 264 Retained 346042 5015279 7.16 265 Deleted 346042 5015279 7.01 266 Deleted 346042 5015279 5.88 267 Deleted 346042 5015322 385 491 Retained 346042 5015322 9.07 493 Deleted
346043 5015575 523 2004 Retained 346043 5015575 66.09 2007 Deleted 346043 5015575 188 2006 Deleted 346043 5015575 520 2005 Deleted 346043 5015576 99.85 2019 Retained 346043 5015576 7.63 2031 Deleted 346043 5015576 11.42 2028 Deleted 346043 5015576 17.28 2025 Deleted 346043 5015576 28.23 2024 Deleted 346044 5015576 358 2016 Retained 346044 5015576 79.44 2021 Deleted More ... ———————————————————————————————————————————— Breakline Filtering Breakline Filtering: Not In Use Gridding Rules Gridding Method: Triangulation with Linear Interpolation Anisotropy Ratio: 1 Anisotropy Angle: 0 Output Grid Grid File Name: R:\GENIVAR\Q111931 (Biogaz-Relevé surface West Carleton)\Relevés de surface\Rapport 2008\Avril 2008\Données terrain\Copie de FIDGPS_Site_Final _sans chemin.grd Grid Size: 93 rows x 100 columns Total Nodes: 9300 Filled Nodes: 3431 Blanked Nodes: 5869 Grid Geometry X Minimum: 345871 X Maximum: 346917 X Spacing: 10.565656565657 Y Minimum: 5015171 Y Maximum: 5016143 Y Spacing: 10.565217391304 Grid Statistics Z Minimum: 0.15192358358169 Z 25%-tile: 8.1330256701649 Z Median: 17.848112503113 Z 75%-tile: 34.678322718708 Z Maximum: 680.17807908344
Z Midrange: 340.16500133351 Z Range: 680.02615549986 Z Interquartile Range: 26.545297048543 Z Median Abs. Deviation: 11.64597443203 Z Mean: 30.357141464117 Z Trim Mean (10%): 23.444939193684 Z Standard Deviation: 46.509993615048 Z Variance: 2163.1795060718 Z Coef. of Variation: 1.5320939776239 Z Coef. of Skewness: 5.6387511077325 Z Root Mean Square: 55.540395604859 Z Mean Square: 3084.7355439442
