HomeMy WebLinkAbout2011 1st Qtrarchitects ~- engineers
175 Pinalawn Road, Ste 308tei 531.756.8000
Metvitie, NY 11747 fax 631393.6322
July 07, 2011
AnthonyJ. Cava, P.E., Regional Solid and Hazardous Materials Engineer
New York State Department of Environmental Conservation, Region 01
SUNY Stony Brook
NY 11790-3409
RECEIVED
JUN 9 2011
Southold Town Clerk
Re:
Town of Southold Landfill
Landfill Groundwater and Gas Monitoring Program
First Quarter 2011 (Routine Event)
H2M Project No. SOHT :].3.~01
Dear Mr. Cava:
On behalf of the Town of Southold, Holzmacher, McLendon, and Murrell, P.C. (H2M),
completed a quarterly sampling and laboratory analysis program for the groundwater
monitoring wells located at the Town of Southold Landfill on Middle Road, Southold, NY. In
addition gas monitoring wells (located in the southwest, south and southeast perimeter of
the landfill) were monitored utilizing a GEMTEC 2000 Plus Landfill Gas Surveyor. Well
locations are shown on the attached Groundwater Monitoring Well/ Gas Monitoring Well
Location Map (Figure 1). Results of our monitoring program are summarized below.
Samplinq Activities
The sampling program was'conducted by H2M on March 30 and March 31, 2011. H2M's
sampling protocol called for locating six (6) groundwater monitoring well clusters distributed
around the perimeter of the landfill. Each well cluster is comprised of two (2) groundwater
monitoring wells, one being screened in the upper depth of the aquifer (i.e., 1S, 3S, 4S, 5S,
6S and aS) and one being screened in the lower depth of the aquifer (i.e., 1D, 3D, 4D, 5D, 6D
and 8D). Each water sample was collected by first purging three (3) static well volumes with
a submersible pump, discharging the purge water ten (10) feet from the well and collecting
the groundwater sample with a disposable bailer. Cross-contamination concerns were
eliminated with the use of disposable bailers in conjunction with cleaning the submersible
pump with laboratory grade biodegradable detergent and wearing disposable Nitrile gloves.
The sampling program was conducted based on the specifications included in the Southold
Landfill Groundwater Quality Assurance/Quality Control Plan.
Analytical Results
Each sample was analyzed by H2M Labs, Inc. for the Routine suite of parameters as required
in 06 NYCRR Part 360. The analytical data is summarized on Table 1. Also presented on
Table I are the field parameters and well construction data, including surface elevation, top
of casing elevation, depth to water/depth to bottom of borehole, and groundwater well
installation dates.
Ho[zmacher, McLenden & MurretL P.C. [ ~w~,, f'2m cern
AnthonyJ. Cava, P.E.
July 07, 2011
Page 2 of 2
Laboratory results were compared to the New York State Department of Environmental
(NYSDEC) standards as identified in the Division of Water Technical and Operational
Guidance Series (TOGS) (1.1.1) - Ambient Water Quality Standards and Guidance Values
dated June 1998. A set of the H2M Labs, lnc, data packages are included on CD-ROM as
Package, and (4) Wet Chemistry Data Package.
As presented on Table 1, several compounds were present at concentrations in excess of
their respective NYSDEC ambient water quality standards, including chloride, nitrogen
(ammonia) as N, iron, lead, manganese, and sodium.
Landfill Gas Monitorinq
On March 30, 2011, the fifteen existing gas monitoring wells were monitored with a GEM
2000 Plus Landfill Gas Surveyor. Weather conditions on March 30, 2011, were observed to
be dear and approximately 35 degrees Fahrenheit with slight winds onsite.
Enclosed with this letter are Figure 1 and Table 2. Figure 1 shows the approximate locations
of these gas monitoring wells, and Table 2 lists these gas monitoring wells and their
corresponding levels of carbon monoxide, oxygen, hydrogen sulfide and lower explosive limit
(LEL) for methane as measured on March 30, 2011. The levels listed in Table 2 indicate that
there is currently a potential for combustible gas migration beyond the boundary of the
landfill in the vicinity of GMW-6, located in the eastern portion of the landfill. These
monitoring results continue a trend of previously elevated methane levels in GiVlW-6.
Should you have any questions or comments, please contact the undersigned at (631) 756-
8000, Ext. 1627.
Very truly yours,
NDON & MURRELL, P.C.
Garrett R.~intzet
Project Manager
Enclosures: (3)
cc:
]ames Bunchuck (with all enclosures except H2M Labs, Inc. data package)
Town Board, Town of Southold (with all enclosures except H2M Labs, Inc. data package)
Patricia A. Finnegan, Esq. (with all enclosures except H2rvl Labs, inc. data package)
X:\SOHT (Town of Southold) - 10900\SOHTll01 (Landfill Monitoring)\01-DRAFT REPORT~Draft Report\2011_Qtr01-
ROUTINE-GAS.doc
M:\ccdd\$DHTNO5Oi\MDNITDRING ~/ELL LOCATION MAP.dw9 L:s~ ModiPiecl: Aug 17, 2006 - 4~35pm Plo~ecl on: J~n 11, 2008 - 4:23pm ]By jnb
TABLE 2
TOWN OF SOUTHOLD LANDFILL
LANDFILL MONITORING PROGRAM
GAS MONITORING WELLS RESULTS - FIRST QUARTER 20t t
Date Unit
3130/2011 Hethane % LEL (LOwer Explosive Limit} 2.8
Oxyqen %
Carbon Monoxide ppm 0~0
Hydrogen Sulfide ppm 0.0
Parameter GMW-t GMW-2 GMW-3 GMW-4 GMW-6
2.0
20,5
0.0
0.0
3.0
0.0
0.0
GMW-5
2,0 2.0
20~4 13.8
0.0 0.0
0.0 0.0
0.0
0.0
GMW-7 GMW-8
O.O 0.0
20.3 18.4
0.0 0.0
0,0 0.0
3/3012011 MeLhane % LEL (Lower 5xolosive Limi6 1~0
O~qen % 19,1 18,7
Carbon Monoxide ppm 0.0 0.0
Hydroqen Su~ide ppm 0.0 0.0
NOTE:
0.0
15.5
GMW-12
0.0
18.5
GMW-13
3.0
16.7
GMW-14
3.0
18.6
GMW-15
3.0
18.5
0.0 0.0 0.0 0.0 0.0
Typical atmospheric levels of oxygen range be[ween 19.5% and 23.5%