HomeMy WebLinkAboutACSA199900001 Staff Report 1993-02-26 Distrjbutd to Lc2t �o
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COUNTY OF ALBEMARLE N ' " - yi" h -
Dept. of Planning & Community Development ;
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401 McIntire Road - VIIEy
Charlottesville, Virginia 22902-4596 , i ;
(804) 296-5823 ,` . j
B/1 RP OF C,;1) Rtil,S ls:
MEMORANDUM
TO: Albemarle County Board of Supervisors
FROM: V. Wayne Cilimberg, Director of Planning & Community jv
Development
DATE: February 26 , 1993
RE: Albemarle County Service Authority (ACSA)
Jurisdictional Area Amendment for David W. Booth/Sandra
Andrews and Sherwood Exum (GOCO, Inc. ) - Tax Map 79,
Parcels 18 and 19
This item will be before you as a public hearing on March 3 ,
1993 . Enclosed is the original report on this matter from
October and subsequent information regarding each parcel.
Tax Map 79, Parcel 19 (Booth/Andrews)
Samples from the well on this property were taken by Applied
Technology and Engineering, P.C. (January 28 , 1993 letter from
John W. Walenten) . The Department of Engineering has provided ,-
response (February 24, 1993 memo from Jack Kelsey) . Engineering
staff does not find that jurisdictional area amendment is
adequately justified.
Tax Map 79, Parcel 18 (GOCO)
This property was the subject of the August 14, 1989 State Water
Control Board letter and the "Site, Risk and Remediation
Assessment of Groundwater Contamination at the Shadwell "76"
Station Shadwell, Virginia" report. Substantial petroleum
contamination was found in the domestic well supply at this site.
A Corrective Action Plan (page 24 of the report) was identified.
It has since been found that the line carrying runoff from the
gravel area near the unloading rack is not a source contaminating
Albemarle County Board of Supervisors
February 26, 1993
Page 2
the well. According to Mr. Harry Montague, a representative of
GOCO, it is now believed that contamination of the unloading rack
area and contamination ofthe well were unrelated. The well is
believed to be the source of isolated contamination resulting
from vandalism. The well is no longer being used as there is
only one employee on-site. GOCO has not attempted to establish
another domestic well on-site, although monitoring wells
established for the assessment indicate the contamination was
localized.
Summary
As stated previously, utility service outside of designated
growth areas has typically been limited to those cases where
properties have experienced quality/quantity problems and are
adjacent to existing lines. Booth/Andrews desires water only
and has a documented coliform level not acceptable for drinking
water. However, the recommended procedure for resolution of this
problem has not been undertaken. Staff does not recommend
jurisdictional area amendment for Parcel 19 (Booth/Andrews) until
the four step procedure for resolving the coliform problem has
been exhausted. GOCO desires water only to existing structures
and has documented localized petroleum contamination. No new
well source has been attempted to be established. The use of the
site is restricted by its non-conforming zoning status and
on-site activities do not require more than domestic water needs.
Staff does not recommend jurisdictional area amendment for Parcel
18 (GOCO) until evidence is provided that no other on-site water
source is available.
•
VWC/mem
cc: Booth/Andrews
Exum
Bill Brent
Jo Higgins
r �
HYDRO SYSTEMS /NClie. 3 3 y3
e5/2 c_
March 2, 1993
Mr. Harry Montague, President
GOCO OIL Company
924 Harris Street
Charlottesville, VA 22901
RE: Site Selection for New Water Supply Well, Shadwell Store, Route 250.
Dear Mr. Montigue:
Per your request, I have analyzed the groundwater data for the above referenced Site to
determine the best location for the placement of a new water supply well on GOCO's property.
The data I reviewed is contained in the June 12, 1990 report HYDROSYSTEMS prepared for
submission to the Virginia State Water Control Board and is titled "Site, Risk, and Remediation
Assessment of Groundwater Contamination at the Shadwell 76 Station, Shadwell, Virginia". As
you are aware, the current water supply well is contaminated with petroleum, mainly in the form
of gasoline type compounds. Benzene concentrations greatly exceed the U.S. EPA and Virginia
Drinking Water Standard of 5 ppb. Benzene is a known carcinogen.
To evaluate potential new water supply well locations on GOCO's property, I reviewed all of
the existing data including water quality, groundwater flow direction, potential sources of
contamination, geologic conditions, and available area. Because of the existing severe
contamination,in the upgradient areas of the site, the use of a septic field to the north of the
Station, the existence of an underground storage tank, unpaved dispensing areas, and
groundwater flow to the northwest, HYDROSYSTEMS has determined that most of the-property
is absolutely unsuitable for the installation of a water supply well. Wells placed within this
' area will either immediately encounter contaminated groundwater or will upon usage draw in
contaminated groundwater from other areas of the site once the well is placed in operation.
This leaves one small area at the southern point of the site. Placing a water supply well here
will be a gamble at best. Well MW-4 was contaminated with total petroleum hydrocarbons just
above the Virginia Drinking Water Standards. The source of this contamination is not known.
In addition, the most highly contaminated monitoring well on site is only 135 feet away at the
loading rack. It is very possible that a water supply well in this location will draw in
2340 Commonwealth Drive • Suite 202 • Charlottesville • VA • 22901
(804) 973-9740
r �
Mr. Harry Montague
March 2, 1993
Page 2
contaminated groundwater from the site to the north. In my experience, this is not an
uncommon occurrence. I am currently working on a case in Albemarle County where a new
well drilled 250 feet up hill from an-area of gasoline contamination became contaminated after
it was put into use. Everyone assumed the well was far enough away and was upgradient of the
contamination. Because of the fractured nature of"ilie bedrock aquifer systems in Albemarle
County, the influence of a pumping well can reach long distances along those fractures, even
pulling in groundwater from downgradient areas as was seen in this case.
Because of the severity of the groundwater contamination at this site and the existing geologic
conditions, HYDROSYSTEMS cannot recommend the placement of a water supply well on the
GOCO property. We are not comfortable with the minimal isolation distances available. We
would instead recommend that a location on one of the surrounding properties be considered or
if possible tapping into the proposed water main.
If you have any questions concerning this letter report or if you wish to pursue potential off-site
well locations, please contact me at your convenience.
Y,e s T ly, t
e frey A. Sitler, CPG
Executive Vice President
Attachment
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oin well locations at the Shadwell "76" Station, Shadwell,
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COUNTY OF ALBEMARLE
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'fclNlP RECEIVE"
FEB 2 4 1993
MEMORANDUM P; ;;n ng Dept
TO: Wayne Cilimberg.-Director of Plan•.- : & Community Development
FROM: Jack M. Kelsey, PE - Civil Engineer"► /
DATE: I,
February 24, 1993
RE:
Jurisdictional Area Request - Tax Map 79 Parcel 19
As requested this Department has reviewed the analysis of the drinking water sampled from
the above referenced private well and the technical grounds for support of an extension to the
ACSA jurisdictional area.
Sampling and testing of this well indicated unacceptable coliform bacteria levels. According
to the Thomas Jefferson Health Department this type of contamination is very common
(especially in older wells) and is a problem they deal with on a daily basis. Very rarely is
the groundwater the source of this type of contamination. Bacteria contamination is
generally due to intrusion of surface runoff into the well as a result of poor installation or (in
the case of old wells) the standards utilized at that time.
The Health Department utilizes a four step procedure for recommending a resolution to these
problems. The first recommendation is to protect the wellhead from the intrusion of surface
runoff, chlorinate and flush the well to remove the bacteria from the stored water 8 well as
the liner and appurtences, and then test the water. Should these measures fail to correct the
contamination, the second recommendation is to install a new well in accordance with present
standards. If bacteria contamination continues to persist, installation of a chlorination system •
is then recommended. Lastly, for the rare case when all options fail, the Health Department
will recommend the owner apply for extension of the ACSA jurisdictional'area.
As a policy the County has discouraged extension of ACSA jurisdictional areas in other than
County designated growth areas, unless public health and safety is endangered. This site is
not located within a County designated growth area.
r• 4
Wayne Cilimberg
February 24, 1993
Page 2
-\The scope of the sampling and testing of this well was limited to the determination of the
water quality in the present condition of the well and are not conclusive evidence that the
well is a danger to public health and safety.
Extension of the ACSA jurisdictional area is not adequately justified until disinfection,
remedial measures to eliminate the source of the contamination, and/or the other options
described above are attempted and failed. Therefore, at this time the Engineering
Department cannot support this request.
JMK/
CC: Jo Higgins - Director of Engineering
RECEIVED
NOV 2 5 1992
Planning Dept:
COMMONWEALTH of VIRGINIA
• .STATE WATER CONTROL BOARD
Richard N.Burton 2111 Hamilton St i•eet
Executive Director
.t„
Post Office Box 11143
fiichnrond.Virginia 232.30 1143 Please reply to: Valley Regional Office
(604)367-0056 116 North_Main Street
P.O'.BoS.i68
Bridgewater,Virginia 22012
(703)828-2595
August 14, 1989
Mr. Sherwood Exum
924 Harris Street
Charlottesville, Virginia 22901
Re: Shadwell GOCO "76" - Albemarle County, PC 89-1392
Dear Mr. Exum:
This is in regard to the report of the taste and odor of petroleum in
the domestic well water supply at the referenced site. On April 28 ,
1989 Mr. John Paul Jones, Albemarle Fire Inspector, reported
petroleum contamination at the referenced site. On June 29, 1989
Mr. Larry Carpenter of this office obtained water samples for
analysis from the well which serves this site. Analytical results
from these samples (copy attached) indicate substantial petroleum
contamination is affecting ground water at this site.
Due to the presence of this contamination, Valley Regional staff
believe that a site, risk and remediation assessment is necessary to
protect human safety and the environment. Therefore, I must request
GOCO Oil Company to submit a site, risk and remediation assessment by
September 29 , 1989 . To be considered complete, these assessments
must address the following elements.
•
August 14 , 1939 -2- Mr. Sherwood Exum
SITE ASSESSMENT
A. Include data on the physical/chemical- properties of the
contaminant
B. Nature and quantity of release
C. Site characterization [soils, aquifer, strata]
1) Geologic
2) Hydrologic
D. Land/water usage, potential usage [population distribution,
potential receptors]
E. Contamination characterization - Vertical and lateral
extent for each phase [if applicable]
1) Vapor phase
2) Dissolved phase
3) Free product phase
RISK ASSESSMENT
A. Potential migration
B. Migration routes
1) Man-made
2) Natural
C. Potential and impacted receptors [Human and Non-Human]
D. Potential/level further environmental damage
REMEDIATION ASSESSMENT
A. Potential for remediation [feasibility]
B. Degree of remediation/end point
C. Applicable technologies
D. Projected duration
V
' rest 14
1989
-3-
Mr. Sherwood Exum
;r•- k yfor Thanou your continuing
cnlnt hv anyhesitate
cooperation. y
questions, do notShould ou or your
to •contact me.
Sincerely,
•
ames D. Green
Regional UST Geologist
Enclosure
cc: Mac Sterrett/VRO File
PReP Central
Mr. John P. Jones
401 McIntire Rd.
Charlottesville, VA 22901-4596
Dy