ROSS ENVIRONMENTAL ASSOCIATES, INC. Hydrogeology, Water Quality, GIS Planning, Remediation, Contaminant Fate & Transport, Regulatory Compliance and Permitting, Environmental Site Assessments, and Radon Mitigation MAIN OFFICE ° P.O. Box 1533 ° Stowe, Vermont 05672 ° phone 802.253.4280 ° fax 802.253.4258 ( over) REGIONAL OFFICE ° P.O. Box 786 ° Newport, Vermont 05855 ° phone 802.334.9982 ° pager 802.240.1151 25 September 2012 Michael & Susan Judd 5141 Nelson Hill Road Derby, VT 05829 RE: Soil Excavation - Judd Residence 5141 Nelson Hill Road, Derby, Vermont (SMS# 2012-4280) Dear Mr. & Mrs. Judd, On 4 and 5 June 2012, Ross Environmental Associates, Inc. (R.E.A.) provided oversight during the removal, transport and disposal of petroleum contaminated soil (PCS) from the Judd Residence located on Nelson Hill Road in Derby, Vermont (Figure 1, and 2, Attachment A). The spill was due to a failed Aboveground Storage Tank (AST), which resulted in the loss of approximately 100- gallons of gasoline. Photographs of the excavation activities are included in Attachment B. The significant findings of this assessment are summarized as follows: Approximately 100-gallons of gasoline were released to the surface from the former AST system, which occurred in the late-Summer/early-Fall of 2011. The spill was due to a catastrophic release from rust holes located at the base of the AST. 32.78 tons of petroleum contaminated soils were transported to Environmental Soils Management Inc. (ESMI) facility located in Loudon, New Hampshire where the soils were treated through thermal desorption. Bedrock was found to be highly weathered at depths ranging from five to seven feet below ground surface (bgs). Photo-ionization detector (PID) readings from the soil excavation ranged between 0.0 to 2,542 parts per million-volume (ppmv) with an average of 331.2 ppmv. Contamination previously discovered in the on-site supply well is characteristic of gasoline and is likely related to the AST spill. No other sources of a gasoline release were noted on site. Several off-site supply wells are located within 1,000 feet of the former AST system. Soil Excavation The excavation encompassed an area of approximately 25 feet by 35 feet in the vicinity of the former gasoline spill located southwest of the Judd residence (Figure 3, Attachment A). The excavation extended down to the top of bedrock, which was encountered at depths of five to seven feet bgs. The soils found directly beneath the area of the former AST exhibited strong petroleum odors, which were confirmed in the field with a PID. PID readings obtained on soil from the excavation ranged between 0.0 and 2,542 ppmv, which are above the VT DEC action level of 20 ppmv for gasoline contaminated soil. The underlying bedrock beneath the area of the spill was
Transcript
ROSS ENVIRONMENTAL ASSOCIATES, INC. H y d r o g e o l o g y , W a t e r Q u a l i t y , G I S P l a n n i n g , R e m e d i a t i o n ,
C o n t a m i n a n t F a t e & T r a n s p o r t , R e g u l a t o r y C o m p l i a n c e a n d
P e r m i t t i n g , E n v i r o n m e n t a l S i t e A s s e s s m e n t s , a n d R a d o n M i t i g a t i o n
M A I N O F F I C E ° P . O . B o x 1 5 3 3 ° S t o w e , V e r m o n t 0 5 6 7 2 ° p h o n e 8 0 2 . 2 5 3 . 4 2 8 0 ° f a x 8 0 2 . 2 5 3 . 4 2 5 8 (over) R E G I O N A L O F F I C E ° P . O . B o x 7 8 6 ° N e w p o r t , V e r m o n t 0 5 8 5 5 ° p h o n e 8 0 2 . 3 3 4 . 9 9 8 2 ° p a g e r 8 0 2 . 2 4 0 . 1 1 5 1
25 September 2012
Michael & Susan Judd 5141 Nelson Hill Road Derby, VT 05829 RE: Soil Excavation - Judd Residence 5141 Nelson Hill Road, Derby, Vermont (SMS# 2012-4280)
Dear Mr. & Mrs. Judd,
On 4 and 5 June 2012, Ross Environmental Associates, Inc. (R.E.A.) provided oversight during the removal, transport and disposal of petroleum contaminated soil (PCS) from the Judd Residence located on Nelson Hill Road in Derby, Vermont (Figure 1, and 2, Attachment A). The spill was due to a failed Aboveground Storage Tank (AST), which resulted in the loss of approximately 100-gallons of gasoline. Photographs of the excavation activities are included in Attachment B.
The significant findings of this assessment are summarized as follows:
Approximately 100-gallons of gasoline were released to the surface from the former AST system, which occurred in the late-Summer/early-Fall of 2011.
The spill was due to a catastrophic release from rust holes located at the base of the AST.
32.78 tons of petroleum contaminated soils were transported to Environmental Soils Management Inc. (ESMI) facility located in Loudon, New Hampshire where the soils were treated through thermal desorption.
Bedrock was found to be highly weathered at depths ranging from five to seven feet below ground surface (bgs).
Photo-ionization detector (PID) readings from the soil excavation ranged between 0.0 to 2,542 parts per million-volume (ppmv) with an average of 331.2 ppmv.
Contamination previously discovered in the on-site supply well is characteristic of gasoline and is likely related to the AST spill. No other sources of a gasoline release were noted on site.
Several off-site supply wells are located within 1,000 feet of the former AST system.
Soil Excavation
The excavation encompassed an area of approximately 25 feet by 35 feet in the vicinity of the former gasoline spill located southwest of the Judd residence (Figure 3, Attachment A). The excavation extended down to the top of bedrock, which was encountered at depths of five to seven feet bgs. The soils found directly beneath the area of the former AST exhibited strong petroleum odors, which were confirmed in the field with a PID. PID readings obtained on soil from the excavation ranged between 0.0 and 2,542 ppmv, which are above the VT DEC action level of 20 ppmv for gasoline contaminated soil. The underlying bedrock beneath the area of the spill was
Michael & Susan Judd 25 September 2012 Petroleum Contaminated Soil Excavation - Judd Residence Page 2
highly weathered and easily broken up during excavation. The area was backfilled with new sand and gravel, which was graded to match the existing ground surface. Approximately 32.78 tons of gasoline contaminated soils were removed from the spill area and transported to ESMI in Loudon, New Hampshire for treatment via thermal desorption. Copies of the load tickets and Bill of Laden’s are included in Attachment C.
Soils during the excavation activities were screened for the possible presence of volatile organic compounds (VOCs) with the PhotoVac Model PE 2020 Plus photo-ionization detector (PID). The PID was calibrated on the day of the excavation, with isobutylene gas to a benzene reference. Soil samples were placed in re-sealable bags, which were then sealed and agitated. Headspace in the bags was then screened for the possible presence of VOCs with the PID. The PID Readings are included in Figure 3, Attachment A.
Please call me if you have any questions or concerns regarding this work. Sincerely,
Ross Environmental Associates, Inc.
Jay Gonyaw, REM, CECM SR. Environmental Scientist
Attachments
cc. Ms. Linda Elliot - VT DEC [email protected] Ms. Chris Masciantonio - Hanover Insurance [email protected] Mr. Dennis Percy – FPH Mr. Scott Klark - Axelrod & Adler Jag/ref: 32073Rpt02.doc
AA
TT
TT
AA
CC
HH
MM
EE
NN
TT
AA
!(NE
LSON
HILL
RDHERRICK RD
HOLLAND RD
WHI
TTIE
R RD
ALDR
ICH
LN
FORTIN RD
GOODALL RD
SUGARBUSH DR
I
Site Coordinates: 44º 59’ 22.42” N 72º 4’ 20.18” W
USGS: West Charleston, Vermont Quadrangle, 1:24,000, 1986
0 500 1,000 1,500 2,000 2,500 3,000250Feet
Figure 1USGS Map
Judd Residence5141 Nelson Hill Road
Derby, Vermont
!(
0.5 mile
NELS
ON
HILL
RD
HERRICK RD
HOLLAND RD
WH
ITTI
ER R
D
ALD
RIC
H LN
FORTIN RD
GOODALL RD
SUGARBUSH DR
I
Site Coordinates: 44º 59’ 22.42” N 72º 4’ 20.18” W
