HomeMy WebLinkAboutMonitoring - 7/7/1995I
TOWN OF MANSFIELD, MASSACHUSETTS
50 West Street, Mansfield, MA 02048
MEMORANDUM
TO: Robert Swanson, Town Engineer
FROM: William F. Williams, Town Manager
DATE: July 7, 1995
SUBJECT: East Street Landfill Monitoring
Please expedite the required monitoring tests at the former East Street
Landfill.
There are resident concerns, and I would like to allay any fears concerning
possible health risks.
WFW/tp
cc: Scott Leite, Health Agent
Dan Clifford, DPW Director
Dave Archard, Assistant Town Engineer
TOWN OF MANSFIELD, MASSACHUSETTS
50 West Street, Mansfield, MA 02048
MEMORANDUM
TO: WILLIAM WILLIAMS, TOWN MANAGER1-71
/
FROM: BOB SWANSON, TOWN ENGINEER
DATE: 5/30/95
RE: EAST STREET LANDFILL - POST CLOSURE GROUNDWATER
MONITORING REQUIREMENTS FROM DEP
As we recently discussed, the State Department of Environmental Protection (DEP) is
requiring us to perform a post landfill closure monitoring program at the East Street
Landfill. The program involves the installation of monitoring wells, sampling and testing
the water from the wells on a periodic basis, and submitting the data in a biannual report
to the DEP. The program will aid us in determining if the landfill is a source of pollution to
our drinking water supply.
We have been aware that this program would be required, but were not sure of the
exact time frame. In the early 1990's we always included approximately $55,000 in the
annual Refuse budget for this, but never used it. In 1993 we discontinued including it in
the budget due to town wide fiscal restraints. At that time we discussed the issue and
decided that the best method to fund this would be to seek a reserve fund transfer when
the need arose.
Camp Dresser & McKee (CDM) designed our landfill cap and also performed
groundwater monitoring on our old, existing monitoring wells at the landfill. I have had
CDM supply me with a proposal, attached and dated 4/20195, for the work. This
proposal is based on an assumption of the data and number of wells the DEP may
require and has a total cost of $56,000. We will not know the extent of the program until
meeting with the DEP and therefore, I asked CDM to revise the proposal only to include
their Task 1 on the attached proposal. Task 1 includes formulating a monitoring
program and finalizing it with the DEP. I prefer to proceed only with Task 1 and then
determine the exact scope of work to implement the program. I recommend that we
proceed with Task 1 now and plan to include the remainder of the work (install
monitoring wells and begin testing) in the FY 97 budget, if the DEP will allow us to hold
off until then. I recommend that we discuss the matter and the method of funding for
this Task 1.
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April 20, 1995
Mr, Robert Swanson
Town Engineer
Town Hall
50 West Street
Mansfield, Massachusetts 02046
of Mansfield Monitoring Program
Subject: Prop
Proposal to Perform Post Closure
East Street Landfill
son: You with a proposal for
Dear Mr. Swan provide y dfill.
CDM) is pleased top East Street Landfill,
Cep Dresser &McKee Inc. ( onitoring program at the Towns
ost closure m tasks: 1) preparation of a wells
preparation of a p 6 Tour dwater monitoring
This program is anticipated to include the following al sis of samples from two
Plan; 2) the installation °ollect on and an Y wells and two (2)
Closure Monitoring 'tor wells; 3) monitoring as moa o ounds. s 6 landfill gas monitoring
and six (6) landfill gfrom a total of seven (7) � further
rounds uarterly basis six ( )
(2) sampling Dints and °n a q ort. The following
re aration of a landfIll post closure rep
surface water sampling P task:
wells and 4) p P
outlines our anticipated scope of work Y Plan Development
1; Post Closure Monitoring
Task program for the towns landfill. The
a Post Closure Monitoring P roundwater, surface water ,
CDM will develop arameter and frequency f° or
mg We will prepare a letter
program will describe the p dfIll inspection and rep roval of this
as monitoring and lan DEP) requesting aPP
landfill g ent of Environmental Protection ( with
to the Departm uest DEP appYOVal for the installation of the addirion-
This letter will also req weiis. CD anticipates one meeIa With
program. as monitoring
df i tasks outline what we believe t e P
al grourjdvvater e ured gas
the DEP will be req
need to include.
Task 2'. Install Monitoring Wells
Wells y one is recommended for
Groundwater Monitoring led in June of 1990, onl wells do not meet the
of the four groundwater wells Sampled h the years•
groundwater monitoring program because the remaining
the g have been destroyed throug
current DEP standards or well being recommended for adfent of the
1 is the only existing well MW 1 is upg
Monitoring well MW- ro ram Monitoring
groundwater monitoring p g direction.
the g y the xoundwater flow
landfill as determined b g
CDMCams I,lresscr & McKee Inc.
Mr. Robert Swanson
April 20, 1995
Page 2
In order to satisfy the minimum groundwater monitoring requirements, three addition-
al wells will have to be installed hydraulically downgradient of the landfill. It is
recommenced that three sets of cluster monitoring wells be constructed. The new wells
will be dispersed to capture representative samples of the entire downgradient ground-
water. They will also be placed adjacent to some of the older wells in order to draw
comparisons of groundwater quality from the past to the present for the respective
areas. Well "A" of each cluster well will be shallow and have a screen set at an elevation
to monitor the top ten feet of the aquifer stratum. Well 'B" will be the deep well which
will monitor the bottom five feet of the aquifer stratum. These monitoring wells will be
installed in accordance with DEP publication #WSC-310-91 entitled "Standard Refer-
ences for Monitoring Wells", dated April 1991.
CDM will provide continuous onsite observation of the monitoring well installation.
We have estimated that approximately 140 feet total of overburden drilling will be
required for these six (6) wells and 10 person days of observation will be required.
Landfill Gas Monitoring Wells
In order to monitor for landfill gas around the perimeter of the landfill six (6), perma-
nent landfill gas monitoring wells will be installed. The wells will be installed along
the Ware and East Street perimeter of the landfill. These wells will be installed during
the installation of the groundwater monitoring wells.
CDM will provide continuous onsite observation of the landfill gas wells installation.
It is anticipated that approximately 90 feet of overburden drilling will be required and
3 days of observation will be required .
Task 3: Proposed Sampling and Analysis Plan
Water Sampling
CDM proposes to collect two rounds of groundwater monitoring samples from the
seven (7) monitoring wells, two (2) surface water sampling points located at the landfill
and a blank and duplicate sample for quality control purposes. Each sample will be
analyzed for the following parameters:
pH (in -situ)
specific conductance (in -situ)
biochemical oxygen demand (BOD)
chemical oxygen demand (COD)
total dissolved solids (TDS)
alkalinity
silver
barium
cyanide
copper
zinc
temperature (in -situ)
dissolved oxygen (in -situ)
nitrate -nitrogen
sulfates
chlorides
manganese
arsenic
cadmium
chromium(total)
CDM(:;uml, llres.cr & f 1cKcc Inc.
Mr. Robert Swanson
April 20, 1995
Page 3
selenium mercury
lead Iron
Volatile Organic Compounds, EPA method 624 (inc. MEK, MIBK, xylenes and acetone)
After the analytical data are received and reviewed, CDM will prepare a summary data
report for the Town and the DEP. At the completion of the second round of sampling
CDM will include in the sampling report submitted to the DEP a recommendation to
reduce the number of parameters analyzed for, if deemed appropriate after analyzing
the results.
Landfill Gas Sampling
Landfill gas monitoring sampling will be performed in conformance with the Massa-
chusetts solid waste regulations, 310 CMR 19.132(4). CDM's work will involve monitor-
ing the six (6) new landfill gas monitoring wells around the landfill for one year on a
quarterly basis for volumes and concentrations of explosive gases measured using
portable field instruments.
CDM will prepare a landfill gas monitoring report and submit a copy to both the Town
and DEP.
Task 4: Post Closure Monitoring Report
The Post Closure Monitoring Report will be prepared in accordance with Massachu-
setts solid waste regulations, 310 CMR 19.142(6). The proposed post closure monitoring
program will include a site inspection. A solid waste engineer will inspect the site for
erosion, vandalism, presence of leachate outbreaks, surface water drainage and evi-
dence of landfill settlement. A post closure report will be developed. After the Town
has reviewed and commented on the report, the report will be forwarded to the DEP.
Schedule
CDM is prepared to developed the site's Post Closure Monitoring Plan and submit it to
the DEP within four weeks immediately following the Town's authorization to perform
the work described in this proposal. Within four weeks of DEP approval of the moni-
toring well locations, CDM will start the installation of the additional wells. After the
installation and development of the wells, CDM will perform the first round of sam-
pling . At that time we will also perform a landfill inspection. The second groundwa-
ter sampling event will be performed approximately six months after the completion of
the first event. The landfill gas sampling will be performed on a quarterly basis for a
one year period.
CDMl:unih l n:,rr \ Meh r In..
Mr. Robert Swanson
April 20, 1995
Page 4
Estimated Project Cost
Based on our understanding of the site and the DEP regulations the following is an
approximate-e3timate-of-prejecLcnstb hy_major tasks for budgetary purposes.
Task 1: Post Closure Monitoring Plan $6,0)00�
Task 2: Install Monitoring Wells (1) $25,000
Task 3: Sampling and Analysis (2) $22,000
Task 4: Post Closure Monitoring Report $3 600
Total $56,600
(1) Approximately $13,500 is for the subcontractor to perform the installation of the
monitoring wells. CDM will solicit three bids for the well drilling in order to
obtain the lowest qualified price for the Town. Costs may need to be adjusted if
DEP should require a more extensive program than described herein:
(2) Approximately $11,000 is budgeted for the required laboratory analysis.
CDM is pleased to continue providing solid waste services to the town and looks
forward to hearing from you soon regarding this proposal. Should you have any
questions, please feel free to contact us at (617) 252-5000.
Very truly yours,
C P(�RESSER & McKEE INC.
1
Richard J. Spies r, P.
Project Manager
401-MSWEMM
Approved by:
William E. Mackey, Jr.
Senior Vice President
CDM'Cl. & NICKCC InC.
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Cmnundcte, Mnssachusetty
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Near. Robert Swanson
Town Engineer
Town Hall
50 1A'est Street
Mansfield, Massachusetts 0204S
Subject: Town of Mansfield
Proposal to Prepare Post Closure Monitoring Program
East Street Landfill
Dear Mr. Swanson:
As we recently discussed , Camp Dresser & McKee Inc. (CDM) provided you with a
Post Closure Monitoring Program (PCM) proposal dated April 20, 1995 which
represents the anticipated scope of work based on our past experience to complete
this project. However, the actual scope of work for this program can not be fully
established until after discussions with the Department of Environmental Protection
(DEP) Southeast Region staff are held. Therefore, there is a potential based on these
discussions that a revised scope of work could be negotiated.
If you prefer we could divide the proposal into two phases by initially providing
Task 1- PCM Plan Development services for S6,000 as the first phase of this project.
Phase II would consist of the remaining three tasks. A revised scope and budget for
the Phase II tasks would be developed after obtaining an approval for the PCM
Plan from the DEP.
If you have any questions, or if we may be of any further assistance, please contact
us at (617) 252-8000.
Very truly yours,
iPdG�P�� I}RESSEI<
P.ichard J. iele
Project Manager
& MC KEE C Approved by:
E William E. Mackey, Jr.
Senior Vice President