WI0100349_MISCELLANEOUS DOCS_20150304

Slusser, Thomas
J_ C0J
From: Evan Yurkovich[[e-mail]]
Sent: Wednesday, March 04, 2015 7:47 AM
To: Slusser, Thomas
Cc: [e-mail]; Jennifer Hill -Verde; Chris Gilbert
Subject: BRP-Balsam Gap Maintenance Facility Site Information
Attachments: Figure 1 -Site Location.pdf; 140414_Figure 2-Location Map.pdf; DENR-Balsam Injection
Event Record.pdf
Mr. Slusser,
Provided is information regarding the Blue Ridge Parkway Balsam Gap Maintenance Facility. Based upon recent
correspondence in relation to the Cumberland Knob Maintenance facility that Altamont provided you in November
2014, we would like to provide you an update on this site as well.. Similar to the Cumberland Knob site, an air sparging
system was installed at this site before it was required to register underground air injection in North Carolina.
The Balsam Gap Maintenance Facility (the site) is located at mile marker 442.8 along the Blue Ridge Parkway, in Jackson
County, North Carolina. The general location of the facility is depicted on Figure 1(c6MR& t°es :
W). A site plan, showing permanent monitoring locations and other prominent features, is included as Figure 2.
The Balsam Gap site operates as the National Park Service Blue. Ridge Parkway fleet maintenance facility. Until 1993, the
petroleum used for the refueling of parkway maintenance vehicles was contained in three underground storage tanks
,(USTs) at the site, as follows: one 1,000-gallon gasoline tank, one 1,500-gallon gasoline tank, and one 2,000-gallon
gasoline tank.
A timeline of assessment and remediation activities is as follows
January 1993—The USTs were removed
April 1994—A soil assessment was conducted
May 1994—An Initial Site Characterization Report was completed
• January/February 1995—Monitoring wells were installed
• " May 1995—Corrective Action Plan (CAP) was completed
An airsparging(AS)/soil vapor extraction (SVE) remediation system was subsequently installed. The remediation system
includes six air sparge points and -three soil vapor extraction points.
Routine groan tpter sampling events have been conducted since the monitoring wells have been installed and most
-recently changed from quarterly to semiannual events. Altamont understands that the following contaminants have
historicalfybien detected in excess of the 2L standard in groundwater samples collected from the monitoring wells at
the Balsam Gap maintenance facility site: benzene, ethylbenzene, toluene, total xylenes, methyl-tert-butyl ether (MTBE),
naphthalene, n-prop-ylbenzene, 1,2,37trichloropropane, and 1,2,4-tri m ethyl be nze ne. Monitoring wells MW-10 and MW-
11, located within and -down -gradient of the source area, have recently contained detections of site constituents above
the laboratory reporting limit and 2L standard. The current plume size (for benzene) extends to approximately 1,600
square feet from.MW-10 to MW-5.
,.The remed iation. system is currently operating. Repairs and updated components were installed on the remediation
= system in the Fall of 2014. An Injection Event Record indicating the air sparging air injection information is attached.
Please let rt a know if you would_like any-#urtherififormation regarding this site.
Thanks,
Evan► Yurkovich
%' Altamont Environmental Inc. -

231 Haywood Street
Asheville, North Carolina 28801
Phone: [phone] ext. 217
Cell: [phone]
Fax: [phone]
[e-mail]
www.altamontenvironmental.com
1
s

11
INJECTION EVENT RECORD
North Carolina Department of Environment and Natural Resources - Division of Water Resources
Permit Number. Melt ` e-ewed Q44%kon Qe vu- 'a f-
wz01W3V 1
1. Permit Information
A��YIa�% ?4 �ke.
Permittee
RAP'+ RT '� r . 1 Ii
17,0115298H Z �
j604 443.8 , 3
Facility Address qC
2. Injection Contractor: Information
1 all ifi�/il�dnvr►ami 3
Injection Contractor / Company Name
StreetAddress
IIIG pmol
City State Zip Code
(�)
Area code -Phone number
3. Well Information _~..:_
Number of wells. used for injection
Well names 'sy': I `L sf
Were any new. Wells installed during this injection
event?_
❑ Yes E4o
If yes, please provide the following information:
�._ Nufler of-Monitoriirg Wells M to
Number of Injection WellsMilo_
Type of Well Installed•(Cheek-applicable type):
❑ Bored ❑ Drilled El Direct -Push
Hand -Augured ❑ Other (specify)
Please include a copy of the GTE l form for each
' - -•---"tyel�irtstalled.
Were: any wells abandoned during this injection.
event?
❑ Yes [�J/No
If yes, please provide the following inforitation:
Number of'Monitoring Wells p14
Number of Injection Wells a►1A
Please include a copy of the OW-30 for each well
abandoned.
4. Injectant Information
Injectant Type
Concentration 10070
If the injectant is diluted please indicate the source
dilution fluid.1�}
Total Volume Injected Qi . D crd
Volume Injected per well , 9-0 crvt j
5. Injection History
Injection date(s)_
Go�ihulauS
Injection number (e.g. 3 of 5) IghmN lwarsw.
Is this the last injection at this site?
❑ Yes ❑ No
I DO HEREBY CERTIFY THAT ALL THE
INFORMATION ON THIS FORMIS CORRECT TO
THE BEST OF MY KNOWLEDGE AND THAT THE
INJECTION WAS PERFORMED WITHIN THE
ST LAID HE PERMIT. j
SIGIATATURE OF INJECTION CONTRACTOR ` - DATE
(14ets r'ltg V-P Ia r
PRINT NAME OF ? ON PERFORMING THE
_, 2.abttiit the origin,,ofthis form to the Division of Water Resources within 30 days of injection.
- Alin:=I3IC Pragram,,t636 Mail Service. Center, Raleigh, NC 27699-1636, Phone,No: 919-807-6464
Form UIC-IER
Rev. 815/2013

M W-6
O'QiL\
G RASS ®W ® FE MW-2
o VE-I
MW®II P-4 GRASS
SP°I oSP-6
MW-8 MW-® 10 0
MVAP--4 SV® -3° TREAT NT
SVE 2 DW-1 oSP-3 SYSTEM
oSP-2 BUILDING
3
® MW M W-9
M W-7
PARKING
WOOD
LEGEND:
MW-9 MONITORING WELL
o SP-2 SPARGE POINT LOCATION
n SVE-,1 SOIL VAPOR EXTRACTION WELL
NOTES:
1. SITE FEATURES AND WELL LOCATIONS BASED ON
THE MAP PROVIDED BY ALPHA ENGINEERING &
ENVIRONMENTAL DATED AUGUST 11, 2010.
® SITE PLAN FIGURE
ENGIN"it ER'I'NG:.-&' iYi?"RO,C'E'o flGY ,fix
231 H'A'YW009 ZtiTREET, ASHEVILLE, NC 28801 BALSAM GAP MAINTENANCE FACILITY
TEL.[phone] FAC. 828.281.3351 67 RANGER DRIVE, BALSAM
W W W O L T OM ON T E N V I R ON MEN T A L. C O M BLUE RIDGE PARKWAY
2
DRAWN BY: WYATT EDSEL SCALE (FEET) JACKSON COUNTY, NORTH CAROLINA
PROJECT MANAGER: CHRIS GILBERT 20, 0 20' 40'
CLIENT: NPS-BLUE RIDGE PARKWAY
16: 04/14/2014 l' = 4.0.'_, FILE PATH: P:\BLUE RtoGE PARKWAY\BALSAM GAP\FIGURES\FIGLRE.2._