2015 annual topographic survey report eng rfq/2015... · the date of this and future annual...

2015 Annual Topographic SurveyRepor t

Presented to:

S u s s e x C o u n t y M u n i c i p a l U t i l i t i e s A u t h o r i t y34 South Route 94

Lafayette, New Jersey 07848(973) 579-6998

Presented by:

S C S E N G I N E E R S4 Executive Boulevard, Suite 303

Suffern, New York 10901845-357-1510

April 6, 2015File No. 13205008.07

Offices Nationwidewww.scsengineers.com

S u s s e x C o u n t y M u n i c i p a l U t i l i t i e s A u t h o r i t y

2015 Annual Topograph ic Survey Repor t

Presented to:

S u s s e x C o u n t y M u n i c i p a l U t i l i t i e s A u t h o r i t y34 South Route 94

Lafayette, New Jersey 07848(973) 579-6998

Presented by:

S C S E N G I N E E R S4 Executive Boulevard, Suite 303

Suffern, New York 10901845-357-1510

April 6, 2015File No. 13205008.07


A n n u a l T o p o g r a p h i c S u r v e y R e p o r t A p r i l 2 0 1 5i

T a b l e o f C o n t e n t s

Section Page

1.0 Introduction.............................................................................................................................................. 1

1.1 Purpose ..........................................................................................................................................1

1.2 Landfill Status ...............................................................................................................................1

1.3 Operations ....................................................................................................................................1

2.0 Calculations of Landfilled Volumes .................................................................................................... 3

2.1 Basis................................................................................................................................................3

2.2 Volume Calculations ....................................................................................................................3

3.0 Operating Data ..................................................................................................................................... 4

4.0 In-Place Compaction ............................................................................................................................. 6

4.1 Historic Densities...........................................................................................................................6

4.2 Net Effective Densities ................................................................................................................7

5.0 Remaining Landfill Capacity/Life....................................................................................................... 9

L i s t o f T a b l e s

No. Page

Table 1. Annual Topographical Report Operating Data.................................................................... 4Table 2. Annual Topographic Report Calculation of Cumulative Composite Density .................... 6Table 3. Annual Topographic Report Calculation of Cumulative Solid Waste Density................. 7Table 4. Total Landfill Footprint Remaining Useful Life vs. Average Annual Tonnage ................ 9

A p p e n d i c e s

Appendix A Landfill Survey Plans and Sections


A n n u a l T o p o g r a p h i c S u r v e y R e p o r t A p r i l 2 0 1 51

1 .0 INTRODUCT ION

1 . 1 P U R P OS E

The intent of this report is to provide the New Jersey Department of Environmental Protection(NJDEP) with information relative to the quantity of solid waste accepted, landfill space utilized,in-place density achieved, and cover material utilized at the Sussex County Municipal UtilitiesAuthority (SCMUA) Sanitary Landfill (Landfill) for the period of December 4, 2013 throughDecember 4, 2014, and since the commencement of landfilling. In addition, this report estimatesthe remaining capacity and life expectancy of the Landfill, pursuant to the requirements ofN.J.A.C. 7:26-2A.8(i).

The date of this and future annual topographic surveys will continue to be in early December inorder to avoid the potential for snow-covered ground in the winter season, which would delay theaerial survey.

1 . 2 L A ND F I L L S TA TU S

The Landfill is composed of three (3) phases (i.e., Phases 1, 2 and 3), as shown on Sheet 1 inAppendix A. Each Phase has been further divided into two (2) separate sections, defined asPhases lA (10 acres), 1B (7 acres), 2A (10 acres), 2B (10 acres) 3A (9 acres), and 3B (8.5 acres).The initial Landfill construction consisted of Phases 1A and 1B only. Operation of the Phase 1Landfill commenced in February 1990 and was completed in September 1997. Approximately13.5 acres of Phase 1 have been capped (Section 1 Final Cap). Construction of Phase 2A wascompleted in August 1997. Landfilling operations in Phase 2A commenced in September 1997.Construction of the Phase 2B landfill was completed in November 2001. Landfill operations inPhase 2B commenced in January 2002 and continued until it was nearly full in late 2008.Construction of Phase 3 was completed in September 2007. Landfilling in Phase 3A began inOctober 2008. Landfilling in Phase 3B began in November 2014. The Section 2 Final Cap (i.e.,the remaining 3.5 acres of Phase 1B plus approximately 4.5 acres of Phase 2A) was completed inNovember 2008. A temporary exposed geomembrane cover was installed over a 10.5-acre area ofof Phases 2B and 3A in September 2014.

1 . 3 O P ER A T I O NS

The Landfill accepts solid waste for landfilling six (6) days per week (i.e., Monday throughSaturday, excluding holidays). The initial lifts of each cell were limited to five feet in height. Thesubsequent lifts have been twelve feet in height. Until 1995, at the end of each workday, 6 inchesof daily cover, consisting of general fill, were placed over the waste placed that day. In 1995,SCMUA commenced the use of alternative daily cover (i.e., tarps) in place of the six inches ofsoil cover, when ambient conditions allow. In 2003, SCMUA began using a specialized tarpingsystem that allows for use of tarp as alternative daily cover in all but the most extreme weatherconditions. At the finished height of each lift, a 12-inch layer of “intermediate” cover material isplaced. In addition, at the end of each work week (i.e., Saturday), a 12-inch layer of intermediatecover material is placed over the waste placed during the preceding week. All side slopes and



other areas to be exposed for greater than 24 hours are also provided with a 12-inch layer ofintermediate cover.



2 .0 CALCULAT IONS OF LANDF I L LED VOLUMES

2 . 1 B A S I S

The information provided in this section was developed from the attached plans, entitled:

2015 Annual Topographic Survey, SCMUA Landfill, by SCS Engineers, dated March 6,2015.

Base grade (i.e., top-of aggregate) contours, as used in the plans in Appendix A to determinetotal depth of waste, reflect as-built conditions. These base grade contours are as certified underSCMUA Contract No.4 for Phase 1, Contract No.21 for Phase 2A, Contract No.224 for Phase2B and Contract No. 331 for Phases 3A and 3B.

Consistent with our 2014 topographic survey report, since Phase 1 is closed and settlement hasessentially ceased (as demonstrated by past topographic surveys, according to the 2011topographic report produced by Cerenzio and Panaro, PC), detailed metrics associated withPhase 1 are not considered in this report, and waste in Phase I is generally only considered hereinto calculate the total Landfill volume. Cross-sections for Phases 2 and 3 are shown atapproximate 100-foot intervals. These sections are included to provide useful information toLandfill operators.

The calculation of Landfill volumes was based on topographic survey data taken at the end of the24th year of Landfill operations. The aerial photography for this 25th topographic survey wasperformed on December 4, 2014. This date is used throughout this report as the day of the 25th

Annual Topographic Survey. The topographic plan, based upon the December 4, 2014 flight, isprovided on Sheet 1 in Appendix A.

2 . 2 V OLU M E C A LC U L A T I O NS

The volumes reported herein were calculated through a triangulated irregular network (TIN)method. The as-built base grade contours (as discussed above) and the top of landfilled materialcontours (based on the most recent aerial survey), were utilized as the limits for calculatinglandfilled volume.



3 .0 OPERAT ING DATA

N.J.A.C. 7:26-2A.8(i)4 requires that the annual topographic survey report include the followinginformation/data:

The quantity of solid waste disposed of at the Landfill since the last topographicsurvey (in tons).

The number of trucks which disposed of waste at the Landfill since the last survey. The volume of solid waste disposed of at the Landfill since commencement of

landfilling operations (in cubic yards (cy)). The volume of daily and intermediate cover applied at the Landfill since the last

topographic survey (in cy). The volume of final cover applied at the Landfill since the last topographic survey (in

cubic yards).

No final cover has been applied to the Landfill since the previous topographic survey (theexposed geomembrane cover installed in 2014 is not considered final cover, and does not occupysignificant volume as it does not include a soil component). As such, the total volume of finalcover material applied since the inception of the Landfill remains at 103,760 cy, as indicated inprior Annual Topographic Survey Reports. Other information required under N.J.A.C. 7:26-2A.8(i)4 is contained in Table 1 below.

T a b l e 1 . A n n u a l T o p o g r a p h i c S u r v e y R e p o r t O p e r a t i n g D a t a

Monthsin

PeriodTons

Disposed

Numberof

Trucks

Volume ofDaily/Int.

CoverTons ofCover

Total AnnualTonnage

(Solid Waste+ Cover)

12/1/07 -12/1/08 12 12,640 225 5,056 6,826 19,466

12/1/08 -12/1/09 12 88,708 14,608 57,931 78,207 166,915

12/1/09 -12/1/10 12 95,762 16,308 58,684 75,892 171,654

12/1/10 -12/1/11 12 107,436 18,281 56,538 73,367 180,803

12/1/11 - 12/1/12 12 100,966 18,559 52,296 68,023 168,989

12/1/12 - 12/1/13 12 102,387 19,184 71,340 92,488 194,875

12/1/13 - 12/1/14 12 99,026 18,564 81,781 105,124 204,150

Notes:1. Waste filling during the period covered by this report occurred in Phases 2A, 2B, 3A

and 3B east side.2. Operating data for previous years can be found in previous annual topographical

reports.3. Tons of cover based on assumed density of 2,700 pounds per cy (lb/cy) for soil cover

and 2,000 lb/cy for street sweepings.4. A total of 15,086 cy of street sweepings were utilized as alternate cover in 2014.5. Total cumulative volume of solid waste and cover is 1,032,366 cy for Phase 1,

1,868,198 cy for Phase 2, 559,517 for Phase 3A and 10,269 for Phase 3B East side,



based on the December 4, 2014 topographic survey and base grade information. Notethat Phase-specific volumes are based on Phase boundaries as shown on the siteplans.



4 .0 IN -P LACE COMPACT ION

4 . 1 H I S T OR I C D ENS I T I E S

N.J.A.C. 7:26-2A.8(i)4(vi) requires a calculation of compaction achieved since the lasttopographic survey (in lb/cy).

It should be noted that the elevations and contours of the Landfill surface established in anygiven annual topographic survey will change due to settlement from additional compactionoperations and waste decomposition. As such, it is not possible to accurately determine theactual volume of Landfill space utilized from one topographic survey to the next. In view ofthis, in each annual topographic survey report, an updated density is calculated (on acumulative basis, both composite and net solid waste). These calculations are contained inTables 2 and 3 below.

T a b l e 2 . A n n u a l T o p o g r a p h i c R e p o r t C a l c u l a t i o n o fC u m u l a t i v e C o m p o s i t e D e n s i t y

Period (1)

Cumulative TotalSolid Waste +Cover (Tons)

CumulativeTotal Volume

(cy)(2)

CumulativeComposite Density (3)

(Tons/cy) (lb/cy)

12/2/99-12/1/00 1,212,375 1,429,532 0.848 1,696.18

12/2/00-12/1/01 1,356,149 1,571,951 0.863 1,725.43

12/2/01-12/1/02 1,503,445 1,661,897 0.905 1,809.31

12/2/02-12/1/03 1,661,332 1,832,801 0.906 1,812.89

12/2/03-12/1/04 1,842,254 2,030,064 0.907 1,814.97

12/2/04-12/1/05 2,037,289 2,223,005 0.916 1,832.91

12/2/05-12/1/06 2,252,716 2,394,248 0.941 1,881.77

12/2/06-12/1/07 2,436,250 2,529,844 0.963 1,926.01

12/2/07-12/1/08 2,597,703 2,665,635 0.975 1,949.03

12/2/08-12/1/09 2,745,624 2,775,093 0.989 1,978.76

12/2/09-12/1/10 2,917,278 2,933,533 0.994 1,988.92

12/2/10-12/1/11 3,098,081 3,069,413 1.009 2,018.68

12/2/11-12/1/12 3,267,070 3,207,953 1.018 2,036.86

12/1/12-12/1/13 3,461,945 3,339,285 1.037 2,073.46

12/1/13-12/1/14 3,666,095 3,470,350 1.056 2,112.81

Notes:1. Historical operating data from previous annual topographical survey reports.2. Cumulative Total Volume based on annual topographic survey and Landfill base

grades.3. Composite Density = Cumulative Total Solid Waste + Cover] (Tons) / Cumulative

Total Volume (cy).



T a b l e 3 . A n n u a l T o p o g r a p h i c R e p o r t C a l c u l a t i o n o f C u m u l a t i v eS o l i d W a s t e D e n s i t y

Period (1)

CumulativeTotal Solid

Waste (Tons)

CumulativeTotal

Volume(cy)(2)

CumulativeCover

Volume (cy)

CumulativeSolid Waste Density (3)

(Tons/cy) (lb/cy)

12/2/99-12/1/00 848,858 1,429,532 271,606 0.733 1,466

12/2/00-12/1/01 944,479 1,571,951 307,365 0.747 1,494

12/2/01-12/1/02 1,037,453 1,661,897 347,764 0.789 1,579

12/2/02-12/1/03 1,143,183 1,832,801 386,403 0.790 1,581

12/2/03-12/1/04 1,258,241 2,030,064 435,191 0.789 1,578

12/2/04-12/1/05 1,379,047 2,223,005 490,086 0.796 1,592

12/2/05-12/1/06 1,501,908 2,394,428 558,654 0.818 1,636

12/2/06-12/1/07 1,615,702 2,529,844 610,314 0.842 1,683

12/2/07-12/1/08 1,717,382 2,665,635 654,591 0.854 1,708

12/2/08-12/1/09 1,806,090 2,788,863 712,522 0.870 1,740

12/2/09-12/1/10 1,901,852 2,933,533 771,206 0.880 1,759

12/2/10-12/1/11 2,009,288 3,069,413 827,744 0.896 1,793

12/2/11-12/1/12 2,110,254 3,207,953 880,040 0.907 1,813

12/1/12-12/1/13 2,212,641 3,339,285 951,380 0.927 1,853

12/1/13-12/1/14 2,311,667 3,470,350 1,033,161 0.948 1,897

Notes:1. Historical operating data from previous annual topographical survey reports.2. Cumulative Total Volume based on annual topographic survey and Landfill base grades.3. Solid Waste Density = Cumulative Total Solid Waste (tons)/ [Cumulative Total Volume-

Cumulative Cover Volume] (cy)

Based on the data in Tables 3 and 4, the pertinent densities are: Cumulative (Overall) Composite Density through 12/1/14 = 2,113 lb/cy Cumulative (Overall) Solid Waste Density through 12/1/14 = 1,897 lb/cy

4 . 2 N E T E F F EC T I V E D ENS I T I E S

The net effective waste density is calculated for use by SCMUA as an overall planning andoperations tool. The net effective solid waste density is calculated by dividing the total mass ofsolid waste placed in a cell by the total design capacity of the cell.

It is noted that, because waste filling in 2014 occurred in both Phases 2 and 3, and separate wastescale records for waste placement for these two phases are not maintained, it is not currentlypossible to provide meaningful separate estimates of net effective density in these two areas ofthe Landfill. However, the net effective density of Phase 1, and of Phases 2 and 3 (as a singleunit) are estimated as follows:



Phase 1:ݐ�594,979 �ݏ �

ݐݐ)�ݕ1,032,366�� ℎݏ ݒ��1 ݑ )× 2000

ݏ

ݕ= 1,153

ݏ

ݕ

Phases 2 and 3:

ݐ�1,716,668 �ݏ

ݐݐ)�ݕ2,437,984� � ℎݏ ݒ��2��3ݏ ݑ )× 2000

ݏ

ݕ= 1,408

ݏ

ݕ

It is noted that some error may be present in these density estimates, as some waste attributed toone phase was placed within the plan boundaries of another phase (e.g., some waste attributed toPhase 2 was placed within the plan boundaries of Phase 1). As such, the resulting net effectivedensities are approximate.



5 .0 REMA IN ING LANDF I L L CAPAC ITY/L I F E

N.J.A.C. 7:26-2A.8(i)4(vii) requires each annual topographic survey report to contain acalculation of the remaining landfill capacity, excluding final cap volume, in cubic yards.

As discussed in Section 1 of this report, Phase 1 and part of Phase 2 of the Landfill are now fulland closed. Total Landfill capacity remaining as of December 4, 2014, based on topographicsurvey measurements and proposed final grades, and not including currently over-filled areas(where settlement is expected to reduce grades to previously approved final grades), is1,173,957 cy. It is noted that this quantity includes volume required for final cap. The remaininguncapped area of the Landfill is approximately 1,404,934 ft2, and the thickness of the final cap isexpected to be 3 feet. As such, the total volume of final cap to be placed is approximately156,104 cy, and the resulting total net Landfill capacity remaining as of December 4, 2014 is1,017,853 cy.

The following analysis was used to calculate the remaining useful life associated with theremaining volume of the Landfill. Since annual tonnage can vary greatly depending uponeconomic conditions within the solid waste industry, an analysis at various annual averagetonnages was used. This analysis is based on the following:

Each ton of solid waste landfilled has an in-place density (based on the value for thecurrent reporting year in Table 3) of approximately 1,897 lb/cy, and thereforeoccupies approximately 1.05 cy air space per ton of waste.

Historic daily and intermediate cover utilized reflects about 29.8 percent of totallandfill air space utilized (i.e., 1,033,161 cy/3,470,350 cy).

Therefore, each ton of solid waste landfilled occupies approximately 1.36 cubic yardsof air space (i.e., 1.05 cy x 1.298).

Remaining Landfill capacity (tons) = ݑ ݒܣ� �( . . , (ݕ1,017,853�

ݑܣ � �1.36ݔ�ݏݕ

ݐLandfill remaining life calculations, based on the above data, are provided in Table 4.

T a b l e 4 . T o t a l L a n d f i l l F o o t p r i n tR e m a i n i n g U s e f u l L i f e v s . A v e r a g e A n n u a l T o n n a g e

AnnualTonnage Remaining useful life (1)

(tons) (years)

90,000 8.3

100,000 7.5

110,000 6.8

120,000 6.2

130,000 5.8

Notes:(1)Remaining useful life as of December 4, 2014; based on 1,017,853 cy of net available airspace.



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2015 annual topographic survey report eng rfq/2015... · the date of this and future annual...

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