HomeMy WebLinkAboutenvironmental assessment 1993(508)255-6511
260 Cranbely Highway
Orleans, Mass. 02653
Qoastal fingi neering Qo.
. Clyll E Atchllecturcl Englnootlng I Slle I Founcletlon I Sholo Ptotocllon I Sonltery.. Consunents lot Sttuclurcl Analysls, Prclecl Feaslblllly, Envhonmonlal .. Lencl Su/leylng .
FiIe No. : C- 13-317
Mr, Leonard Pinaud
Emergency Response Section, BWSC
Massachusetts Department of
Env i ronmental Pro Lec t ion
SER0 - Lakev i I Ie Hospital
Lakev i I Ie, ltA 02347
Re:
Dear Mr. P i naud:
Pursuant to our on-site meeting of 2/05/93, Coastal Engineering Co., Inc., as
consrrltant for Conrad NobiIi, has prepared this filing as Supporting
Documentation to remedial response De&sures taken to date at the above referenced
property, The initial emergency response was precipitated by a "no-heat" calI
from the properly owner indicating a loss of approxirnately 1351 gallons of #2
fuel oil from a feed line below the basenent floor, as reported to the MA DEP
on 72/31/92. Resulting remedial measures include:
1) contaminated soil removal and stockpiling;
2) tesL borings with soil sampling and photoionization screening;
3) design and construction of a passive vapor recovery system in the
basement area;
4 ) installation of moniLor wells with groundwater analysis andI groundwater flow charac te r i zat ion.
Information relative to these activities and findings is enclosed as Appendices
io tt,ir report with a BilI of Lading to authorize transport of contaninated soils
to the Bardon-Trimount recycling ficility in Stoughton, MA. Department approval
is currently pending the submiital of such infornation for the operation and
monitoring Lf-th" piopo"ed free product recovery system as shown on PIan ERM-
i^, Appunii* l. Equipment specifications for the skimmer pump and carbon
sorption unit are shown in Appendix G'
subsequent to a review of site condilions and MA DEP notification of findings'
Coastal Engineering personnel supervised and inspected soil removal operations
below the -bo".r"nt floo". Details on this work are docunented in the Field
Response Log in Appendix B. Photoionization screening of soiLs showed gross soil
Reglstercd Polesslonal Englneets & Land SuNeyots
February 18, 199 3
YARIiTOUTH, Ii{A--S92-0964
35 Aunt Dorah's Lane
Nobi I i Residence
Epergency ReEedial Response -Initial Beport
DEP/SERO/Pi naud Page 2 February 18, 1993
contamination extended to the groundwater interface aL 12tt below the basementslab, A 2" PVC HeII (Ml{-l) was set within Lhe excavs.ted area and the water
sample collected. Water analysis showed limited groundwater impact at the MW-1Iocation with no free product (Appendix C), The rell has been further utilizedin the design of a passive vapor recovery systen. Based on criticalenvironmental conditions at the site, apparent quantity of release and
documentation of groundwater impact, additional monitor weIIs were installed to
determine the extent and fate of groundwater impa.ct.
Monitor wells MW-2 and MW-3 were installed behind the dwelling intermediate to
the release area and Follins Pond. SoiI sanpling showed a substanLial thicknessof blue clay occurred at the groundwater intercept and appeared to be aneffective aquiclude in controlling verlical and horizontal groundwater flow.
No significant soil contamination was indicated by photoionization screening at
eiLher of these locations (see Appendix D) although low level groundwaLer
contamination has been determined in IilW-2. Monitor weII MW-4 was installed infront of the dwelling (north) approximately 15' from the release area. Gross
soil contanination was determined in soil sanples below 13' with obvious impact
to groundwater. Hithin 24 hours, monitor well Ml{-4 showed 11" of free product.
On 2/2/93, a skimner unit was installed in MW-4 to recover free product.
Recovery at the weII has averaged 1 gallon per day since that time.
The deeper occurrerrce of clay at the I'lW-4 location indicates a northerly dip to
Lhe sLrala and appears to be responsible for the local diversion of groundwater
flow. The presence of free product in Ml{-4 but not in MW-l is indicative of
northerly groundwater flow and free product migration. Monitor wells Ml{-S and
Mt{-6 were installed and groundwater gauged on 2/73/93 to confirn a northerly
groundwater flow of N6'E. As such, any groundwater impact or fuel oiI migration
would be toward Ml{-6. No obvious soil or groundwster itnpact was noted at the
Ml{-S or MW-6 locations during monitor welI insLallation. Laboratory analysis
results of groundwater sanples at these locations is pending at the tine of this
report.
Based on these findings, it is the recommendation of coastal Engineering that
theroperation and monitoring of the free product recovery systen with suppression
well as represented herein be authorized by the Department and put into operation
assoonaspossible.Contingenciesfortheoperationofthissystemwillinclude
the following monitoring requ irements:
Laborator v Analvs i s (EPA 601 602):
Effluent Discharge: on start up of suppression well (Rush)' weekly for
a nonth and bi-weeklY thereafter.
Effluent Internediate: I{eekly for a month and nronthly thereafLer.
Irlonitor lfells: Bi-weekly first month and monthly thereafter'
Ir{onitor HelI Gaug ing/Groundwater Flow Determinrtion: Bi-weekly first month
and monLhly thereafter.
I
t
r
DEPlSERO/Pinaud Page 3.February 18, 199 3
Status reports wiII be filed with the Department on a regular basis. These
reports will include free product recovery logs, laboratory analysis and updated
site plans with groundwater flow deterninations. This inforrnation wiII be
accompanied by a narraLive on findings and environmental conditions. The need
for additional monitor welIs and/or modifications of the monitoring program wiII
be continuously addressed as new data is available, As always, any deLermination
of uncontrolled migration of free or dissolved fuel oiI contamination will result
in immediate Department noti fication.
ShouId you have any questions regarding this proposal or need additional
information on the project, please call me directly et your earliest convenience.
I look forward to your prompt reply.
Very truly yours,
COASTAL ENGINEERING CO. , INC.
David C. Bennett' R.S
Hyd rogeo Iog i s t
DCB/ca
Enc, :Bi II of Lading
"IniLial Report - Supporting Docunentation", Feb', 1993
Conrad NobiIi, Owner
Deputy Chief l{illiam A. Greene, Jr., Yarmouth Fire DeparLment
Bruce ltturphy, Yarmouth Health Department
Ron Bruel, Friedline & Carter Adjustment' Inc'
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