NCG510056_Regional Office Historical File Pre 2018

North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F, Easley, Governor
Februar ? 2 ., 2006
I\lr. Steven lIolzrsreister
Hersey Meters
P.O. Box 1.28
Cleveland, N.C. 27013
Dear Mr. Holz. eister;
,William G. Ross, Jr., Secretary
'Alan W, Klimek, P.E,, Director
Rescission o
Hersey Meters
Rowan County
FEE
CG510056
Division staff has confirmed that the subject Certificate of Coverage [issued under NPDES
General Permit NCG510000] is no longer required. Therefore, in accordance with your request,
CoC NCG510056 is rescinded, effective immediately.
If in the future your company wishes to discharge wastewater to the St.ate's surface waters, you
rn.ust first apply for and receive a new NPDES permit. Discharge of wastewater without a valid
NPDES permit will subject the responsible party to a civil penalty of up to $25,000 per day.
If you have questions about this matter, please contact Charles Weaver of my staff at the
telephone number or address listed below.
cc. Central Files
Maorea` dle Regional al )ffice / Mike Parker
NPDES Permit file
Fran 11![cPheraun, D1vC3 Budget Office
1617 Mail Service Center, Raleigh, North Car otin;a 27699.161'7
512 North Salisbury Street, Raleigh, North, Carolina 27604
Internet: h2o.enr.state.nc.us
Phone: [phone],3, extension 511 / FAX [phone]
9arles.Weavo 7 ("c atl,rwet
One
N©-thCa o ina
Naturally
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NCDENR
North Carolina Department of Environment arid Natural Resources
Division of Water Quality
Michael F. Easley, Governor William G, Ross, Jr., Secretary
Alan W. Klimek, PE., Director
February 10, 2006
Dale Smith
Hersey Meters
1.0210 Statesville Boulevard
Cleveland, NC 27013
Subject: NPDES Permit NCG510000 renewal
Certificate of Coverage (Coe) NCG510056
Hersey Meters remediation
Rowan County
Dear Permittee:
The facility listed above is covered under NPDES permit NCG510000 for discharge of remediated
groundwater. NCG510000 expires on September 30, 2006. Federal (40 CFR 122.40 and North Carolina (15A
NCAC 21.1.0105(e)) regulations require that permit renewal applications must be filed at least 1.80 days prior
to expiration of the current, permit. If you have already mailed your renewal request, you may
disregard this notice.
To satisfy this requirement, the Division must receive your renewal request postmarked no later than
April 3, 2006. Failure to request renewal by this date may result in a civil assessment of at least $500.00.
Larger penalties may he assessed depending upon the delinquency of the request.
If any discharge from the remediation system will occur after September 30, 2006, your CoC must be
renewed. Discharge of wastewater without a valid permit would violate North Carolina General Statute .143-
215.1; u.npermitted discharges of wastewater inay be assessed civil penalties of up to $25,000 per day.
If you have halted remediation activity due to lack of trust fund money, but your site ranking from the
Aquifer Protection Section requires future remediation & discharge, your CoC must, be renewed,
If all discharge has ceased at your facility and you wish to rescind this CoC [or if you have other
questions}, contact me at the telephone number or c-mall address listed below.
Sincerely,
Charles H. Vrreaver, Jr.
NPDES Unit
cc: Central Files
Mooresville Regional Office, Surface Water Protection
NPDES File
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
512 North Salisbury Street, Raleigh, North Carolina 27604
Phone: [phone], extension 511 FAX [phone] / chartesmeaver@ncmail,net
One
NorthCarolina
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PPIPPir State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
Mr. David J. Butkus
Hersey .Meters
Post Office Box 128
Cleveland, North Carolina 27013
Dear Mr. Butkus:
NCDENR
September 3, 1999
SEP 9 1999
Subject: Permit Modification -Name and
Ownership Change
Hersey Meters
Permit No, NCG51.0056
(formerly Grinnell Fire Protection Systems)
Rowan County
In accordance with your request received August 24, 1999, the Division is forwarding the subject
permit. The changes in this permit are only with regard to a name and an ownership. All other terms and
conditions in the original permit remain unchanged and in full effect. This permit modification is issued
pursuant to the requirements of North Carolina General Statute 1.43-215.1 and the Memorandum of
Agreement between North Carolina and the U. S. Environmental Protection Agency dated December 6,
1983.
This permit does not affect the legal requirement to obtain other permits which may be required by
the Division of WaterQuality or permits required by the Division of Land Resources, Coastal Area
Management Act, or any other Federal or Local government permit that may be required.
If you have any questions concerning this permit,. please contact Ms. Vanessa Wiggins at telephone
number [phone], extension 520.
Sincerely,
ORIGINAL SIGNEP PY
WILLIA
Kerr T. Stevens
cc: Central Files
Mooresville Regional Office, Water Quality Section
Stormwater and General Permits Unit
Point Source Compliance Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG5I0000
CERTIFICATE OF COVERAGE No. NCG510056
TO DISCHAR ;E PETROLEUM CONTAMINATED GROUNDWATER AND SIMILAR WASTEWATERS
UNDER THE
NATIONAL POLLUTANT 1ISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina Genera➢ Statute 143-215,1„ other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
Hersey Meter
is hereby authorized to discharge (non -contact cooling, boiler blowdown, cooling tow.. e blowdown, cooling waters
associated with hydroelectric operations) water from a facility located at
Hersey Meters
Highway 70
south of Cleveland, NC
Rowan County
to receiving waters designated as an unnamed tributary to Withrow Creek in the Yadkin River Basin
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, '.III
and IV hereof.
This Certificate of Coverage sl''►all come effective Septeher 3, 1999,
This Certificate o•f Coverage shall remain in effect for the duration of the General Permit.
Signed this day September 3., 1999.
ORIGINAL SIGNED B
WVILLIAM C. MILLS
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

North Carolina
artment of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
April 25, 1997
DAVE BUTKUS
GRINNELL FIRE PROTECTION SYS
P,O, Box 128
Cleveland, NC 27013
Subject: Renewal of NPDES Permit No. NCG510056
Rowan County
Dear Permittee:
DBJ-INJ Pt
In accordance with your application for permit renewal, the Division is forwarding the subject NPDES general
permit for petroleum contaminated groundwater remediation systems. This General Perrnit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North
Carolina and the US Environmental Protection Agency dated December 6, 1983 and as subsequently amended,
The Certificate of Coverage previously issued to your facility is now valid under the revised General Permit for
discharges associated with groundwater remediation systems (NCG510000 - issued August 22, 1996). The new General
Permit is more comprehensive, in that it covers remediation of groundwater contaminated with heavier fuels (such as
diesel, fuel oil, and kerosene) as well as gasoline contamination. Please note that the permit has three effluent
limitations pages. The type of contamination at your site (gasoline only, heavy fuels only, or gasoline and heavy
fuels) vill determine the effluent limitations for your discharge.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you
have the right to request an individual perrnit by submitting an individual permit application. Please take notice
that the previously issued Certificate of Coverage is not transferable except after notice to the Division of Water
Quality. The Division of Water Quality may require modification or revocation and reissuance of the Certificate of
Coverage.
This permit does not affect the legal requirements to obtain other permits which may be required by the Division of
Water Quality or permits required by the Division of Land Resources, the Division of Coastal Management, or any
other Federal or Local governmental permit that may be required.
If you have any questions or need additional information, please contact Charle
733-5083, extension 511.
cc: Central Files
Mooresville Regional Office
Permits & Engineering Unit
Facility Assessment Unit
eaver at telephone number (919)
Respectfuqy, /7 •
A. Preston HMA,''ard, Jr., RE.

State of North Carolina
Department of Environment, Health and Natural Re
Division of Environmental Management
512 North Salisbury Street » Raleigh, North Carolina 27611
James 13, Hunt Jr., Governor
Mr. Edmund Q.B. Henriques
ENSCI Corporation
1108 Thomasville Road
Lexington, NC 27260
Jonathan. 13. 1-' owes, Secretary
h 15, 1993
Subject: Application No. NCG510056
Acknowledgment and Additional
Information Request
Grinnell Fire Systems
Rowan County
Dear Mr.-Ierariques:
The ;Permits and Engineering Unit received your application for coverage under groundwater
rernediation. February 17,1993 and your check for $400.00 and has completed a preliminary engineering
review of the subject application.
The following items must be addressed before we carn complete our rev
Ashe wills
7(A/251-6208
1) Document alternatives to surface discharge
viable. Examples are hookup to sanitary s
id reasons the options are not economically
er, infiltration gallery', spray irigation, etc.
For new facilities, final plan layout, including connection of piping and electrical
systems, must be submitted signed and sealed by a North Carolina registered
Professional Engineer. A plan of the remediation equipment in relation to other features
at the site (such as roads, buildings and wells) with buffer distances from buildings and
property lines, a site location reap, and the location of the discharge point needs to be
signed and sealed by a registered Engineer. Four copies of plans must be submitted.
Plans and specifications for purchased remediation equipment, (i.e. oal/water
separators, air strippers and carbon filtration units), must be reviewed by a professional
engineer and certified as applicable. to the particular use and the equipment's adherence
to good engineering practices. This can be done as a short report on the models of the
equipment and their use in the treatment process.
Regional Offices
e Raleigh Washington 4x'ilaa ingt n Winston-Salem
39 919/571- 700 919/946-f481 91 / 9 31)fi:8i? 19/S96i-7(X)7
Pollution Prevention Pays
1.3ox 29535, R ileig 1, North Carolina 2 7626-05 35 Telet hone. 919-733-7015
An Equal Opportunity Afflarnaoivc. Action 'Employcr

Edmund Henriques
1993
age ‘o
4) Copy of calculations of removal efficiencies for benzene, toluene and other constituents
of interest, sizing of remediation equipment in relation to flow and final discharge of
limited parameters in relation to permit limits.
5 Delegation of Authority (see attached sheet),
Refer to the subject permit application number when providing the requested in rmation. Please
submit i1 ur copies of all information to my attention at the address below. Also, please
note that failure to provide this additional information on or before April 20, 1993 will subject your
application to being returned as incomplete, in accordance with 15A NCAC 214.0208.
If you have any qu stions on this matter, please call me at 919/ 733-5083.
Sincerely,
r Section
Peimit File NCG510056
Ron 1) Carlo, Grinnell Fire Fro ion Systems
A
Charles A. Alvarez
Environmental Engineer
NPDFS Group

To: Permits and Engin ing Unit
Water"all ty Section
Attention: Charlesr
PART
F I rTY PROJECT: Yes
y t"No. N/A
Date: April 1
NPDES STAFF REPO T AND A D RECOMMENDATIONS
County: owan
NPDES Permit o.: NCG510056
MR0 No. 952
-
BEN:
AL INFORMATION
Faoi l i ty and Addre
d»rIniell: Fire Protection Systems
Post Offioe Eo 128
lev and 27013
Date of Investigation: April , 1993
E ort Prepared By: Michael L .; Parker, Envi ron .. En
Person ntaoted and Telephone Number: Ron DeCarlo, (7 4)
T7-1
Dons to Site: The site i looaterl on the north
of Hwy, 70 in the Town of Cleveland p ro . 0.4 mil
of the junotion of Hwy. 70 and E 1741
charge Point( s); Li
L;tite:
Longitude,:
43' 1"
3,"
aoh a USGUSGS MaI? Extract and in dioa
analaohare point on map.
Quad o. E 16 NW
ze
No
anion area Conai
i n A
char
e Points
Tr' r by (re atl.on hip to flood pia
not located in a
n The
h a `11.oa.t
uded): Gently
Plain.
None `within 50 feet.

Page Two
10. Receiving Stream or Affected Surface Waters: U. T. to
Withrow Creek
a Classification: C
h River Basin and Suhbasin No.: Yadkin 030706
c. Describe receiving stream features and pertinent
downstream uses: The receiving stream at the po nt cf
discharge is a headwaters area with little, if any
natural stream flow. The stream appears t+o he fed
primarily by surface drainage. There are no other known
dischargers and/or water intakes above or below this
proposed discharge.
PART II DESCRIPTION OF DISCHARGE AND TREATMENT WOR
1, a. Volume of Wastewater: 0.00648 MGD (Design Capacity)
b. What is the current permitted capacity: N/A
c. Actual treatment capacity of current facility cr. rrent
design capacity): N/A
d. Date(s) and construction activities allowed by previous
ATCs issued in the previous two years: N/A
e. Description of existing or substantially constructed
WWT facilities: N/A
Description of proposed WWT facilities: The ap
proposes to construct WWT facilities consisting
air stripper followed by carbon adsorption.
Possible toxic impacts to surface waters: None
expected.
h. Pretreatment Pr
in development
should be required
POTWs only): N/A
oved
not needed
1
ant
an
Residual handling and utilization/disposal scheme: N/A
a If residuals are b ng land applied specify DEM Permit
No, N/A.
Residuals Contractor: N/A
Telephone No. N/A
Residuals stabilization: PSRP PFRP Other
Landfill; N/A
Other disposal/utilization scheme (specify): N
Treatment Plant Classification: Less
rating (include rating sheet). Class
han 5 points.; no

Page Three
4. SIC Code(s): N A
Wastewater C
e
ary: 66
ndary:
MTU Code(s): 56000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction 1r3 t
Funds or are any public monies invo
No
Speci3
reques
ed (municipals only)?'
itoring or limitations (including
None at this time.
Important SOC/JOC or Compliance Schedule dates;
4. Alternative Analysis Evaluation
ty)
a Spray Irrigation: Insufficient area
b Connect to regional sewer system: The Town of
Cleveland has indicated that they would not accept the
wastewater into their collection system.
c, Subsurface: Insufficient area,
d. Other disposal options: N/A
PART IV '- EVALUATION AND 'RECOMMENDATIONS
Grinnell Fire Protection Systems requests approval to
discharge treated groundwater contaminated by leaking underground
storage tanks. The applicant proposes to use air stripping
followed by carbon adsorption as the method of treatment.
Per
Gen
This application qualifies for coverage under a General
t for groundwater remediati ?n. It i.s requested that a
al Permit be issued.
Date

RATING SCALE FOR CLASSIFICATION OF FACI
TIES
ITEM
Name of Plant:
Owner or Contact Person:
Mailing Address:
County: Telephone:
NPDES Permit No.
IssueDate:
Existing Facility
Rated By: r 9.�►,Y
Nondisc. Per. No.
Expiration Date:
New Facility
Date: 41 ,sy'
Reviewed (Train. & Cert.) Reg. Office_
Reviewed (Train, & Cert.) Central Office
ORC Grade
(1) industrial Frelrealment Units and/or
Industrial Pretreatment Program
(see`definiiion No. 33)
(2) DFSIG,N FLU'' OF PLANT IN GPD
(not applicable to non•conlaminated cooling
waters, sludge handling facilities for wailer
purification plants. totally closed cycle
systems (del. No. 11). and facilities
consisting only of Item (4) (d) or Items (4) (d)
and (11) (d))
0 — 20,000 ..
20,001 -- 50,000 . ,
50,001 -• 100,000...
100,001 — 250,000.....
250,001 •- 500,000
500,001 ••1.000,000...
1,000,001 2,000,000 . , ..... , , .. , .... , ........
2,000.001 (and up) - rate 1 point additional for each
200,000 pod capacity up to a
maximum of 30
POINTS
Flow (gpd) :
000
(3) PRELIMINARY UNITS (see definition no. 32)
(a) Bar STeens..........................».
Or
(b) Mechanical Screens, Static Screens or
Comminuting Devices .... . ...... ....
• •
(c) Gril. Removal ......... * .
er** •.»....,
(d) Mechanical or Aerated Grit Removal
(e) Flow Measuring Device ........... . .. . .. . .
Or .
(f) Instrumented Now Measurement
(g) Prostration .......... ,.....................*.*
(h) Influent Flow Equalization , .
(-1) Grease or Oil Separators . Gravity....—
Mechanical
Dissolved Air Flotation.
(i) P
4
5
8
10
2
1
2
1
2
2
2
2
3
e
5
ITE
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) .
(b) Imhoff Tank .......... - , ,
(c) Primary Clarifiers ...... .
(d) Settling Ponds ca Settling Tanks for in
Nontoxic Materials (sludge handling facilities
for water purification plants, sand, gravel,
stone,and other mining operations except
recreational activities such as gem or gold
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System ..
Diffused Air System , , . , . , .
Mechanical Air System (fixed
floating or rotor) . , , ..:... , m
Separate Sludge Reaeration
(ii) Trickling Filter
High Rate ......... . .... .
Standard Raie ....
Packed Tower.,....,....
(iii) Biological Aerated Filter or Aerated
Biobgirai Filter , ....
(iv) Aerated Lagoons ............ ..... ,
(v) Rotating Biological Contactors . , .... .
(vi) Sand Fillers-
intermrltenI biological , ..
recirculating biological ...
(vn) Stabilization Lagoons , ..........
(viii)CI*dhe r
(ix) Single stage system for combined
carbonaceous removal of BOO and
nitrogenous removal by nitrification
(see def. No. 12) (Points for this item
have to be in addition to items (5) (a)
(i) through (5) (a) (viii) , ,
(x) Nutrient additions to enhance BOD
•
(xi) Biological Culture ('Super Bugs') addition
to enhance organic compound removal .....
POIN
2
5
5
20
ti)
8
3
7
5
S
10
10
lit
2
3
5
5
8

MJ
(m) Reverse Osmosis . , ... .
(n) Sand or Mixed•Media Fi
(o) Treatment processes for
cyanide,........,...
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ... , , . .
(7) SLUDGE TREATMENT
urew:S ',Oen�
ion - High Purity Oxygen System . , , . , 20
Diffused Air System ... , , . .... 10
Mechanicat Air System (fixed,
floating. or rotor) .... ..... .
Separate Sludge Reseration , .. .
(ii) Trickling Filler -
Nigh Rate ...... ..... . .
Standard Rate ...........
Packed Tower............
(fii) Biological Aerated Fitter or Aerated
Biological Filter ........................10
(Iv) Rotating Biological Contactors ....
(v) Sand Fitter.
intermittent biological . ;
recirculating biological . .
(v1) Clarifier ....................... .
(6) TERTIARY Oda ADVANCED TREATMENT UNIT
(a) Activated Carbons Beds -
without carbon regeneration .......
with carbon regeneration ............ . » . .
(b) Powdered or Granular Activated Carbon Feed
without carbon regeneration ..............
with carbon regeneration ......
(c) Air Stripping ... • ..................
(d) Denitrificalion Process (separate process)
(e) Electrodiatysis ....... ._.............
(1) Foam Separation .
(g) fon Exchange,......
(h) Land Application of Treated
(see definition no, 22b) (not applicable for
sand, gravel, stone and other simitar mining
operations)
:(i) on agriculturally managed sites (See del.
No.4)................................... 10
(ii) by high rate Infiltration on non•agricutturatly
managed sites (includes rotary distributors
and similar fixed nozzle systems) ............ 4
(iii) by subsurface disposal (includes low pressure
pipe systems and gravity systems except at
plants consisting of scpiic tank and nil►ifica-
8
7
5
5
10
2
3
5
(j) Phosphorus Removal by Biological Processes
(See def. No. 26) ......... .......... . ........
(k) Polishing Ponds - without aeration .
with aeration ........
(1)Post Aeration - decade ............ .
diffused or mechanical . .
(a) Sludge Digestion Tank • l•lsatad ... , ,. . , - .
(b) Sludge Stabilization (
lc) Sludge Drying Beds .
Vacuum Assisted .....
(d) Sludge Etut►ialion . , . ... , ... , ,
(e) Sludge Conditioner (chemical or thermal) thermal) . • , ...
(I) Sludge Thickener (gravity) .. .... .
(g) Dissolved Air Flotation Unit•
(not applicable to a unit rales as (3) (i) ........
(h) Sludge Gas Utilization (including gas storage) . .
5
5
5
10
5
3
5
2
5
5
5
5
4
5
(k) Vacuum Filler, Centri
similar dewalering device.
(8) SLUDGE DISPOSAL (inciuding incinerated ash)
(a) Lagoons . ...............
(b) Land Application (surface and subsurface)
(see definition 22a)
-where the facility holds the land app. permit , 10
-by contracting to a land application operator who
holds the land application permit ............ • .. 2
-land application of sludge by a contractor who does
nol hold the permit for the wastewater treatment
facility where the sludge is generated .. . 1©
(c) Landfilled (burial) ..........• .. 5
(9) DISINFECTION•
(a) Chlorination ................... . 5
(b) Dechlorination ........ . ....... . 5
(c) Ozone ............ ...... ......,.... 5
(d) Radiation . 5
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(not applicable to chemical additions rated as item
(3) (J). (5) (a) (zi), (6) (a). (6) (b), (7) (b). (7) (e),
(9) (a), (9) (b), or (9) (c) 5 points each: List:
(11)
MIS
(a
N.
Sludge Folding Tank • Aerated . , ..........`.. • 5
Non -aerated ....... , . „ 2
Sludge Incinerator • {not including
►bon regeneration)
Filter Press or
e
.1©
other
1©
ELLANEOUS UNITS
Holding Ponds, Holding Tanks or Settling Ponds
for Organic or Toxic Malerials including wastes
from mining operations containing nitrogen and/or
phosphorous compounds in amounts significantly
greater than is common for domestic wastewater .......... 4
Effluent Flow Equalization (not applicable to storage
basins which are inherent in land application systems). 2
Stage Discharge (not applicable to storage bssins
inherent in land application systems...- .•, 5
Sland•By Power Supply---... _.__ . r _.»»....._......_.. 3
Thermal Pollution Control Device....,....._ ........................... 3
TOTAL POINTS f 0
CLASSIFICATION
Class I_______________„ 5 • 25 Paints
Gass II.... „..___,,,__,_,. _.___ 26. 50 Points
5 Class I11...»_.....___ 51- 65 Points
Class IV........._.._ _ _.. ... 66- Up Points
Facilities leaving a rating of one through four points, inclusive,
do not require a certified operator. Classification of sit other
facilities requires a comparable grade operator in responsible
charge.
5
5
5
5
Facilities having an activated sludge process will be assigned
a minimum classification of Class 1I.
Facilities having treatment processes for time rerrrovat of metal
or cyanide will be assigned a minimum classification of Class IL
8 Facilities having treatment processes for the biological rernovel
2 of phosphorus wilt be assigned a minimum Classification of Class'
rlf.

D SION OF E RO ". L
AA T
Water ty
Perm iss and Engineering Unit
March 9, 1993
More 'vale Regional Office
Engi
eer, NPDES Permits
e mt: Grinnell Fire e Systems Plant, NCG510056 in Rowan
has lied for an ATC and GP for groundwater re ediatio .
issue a strlf report on the above project. you need more
tion please call Inc at 919/ 7 3 3-5 0 8 3 ext

Corective Ac
Gr
The N
Edmund G.B. immfe1ric;
1-fydredaaloist
Plan for. Ti.eatrnet of acted
oil aild Grouricivvater
re ProtectionSys
Cleve North Carotin
Prepared fared for
Caron a l r f rtmc rit of
Health or al Rose
MenrsevlCe I:legion& Off
ENSCI Corporation
108 Old Thomasville Road
High Point, North Carolina 27260
1992
uslr.rs 1. flrn
Technica Opera
Dire
0

ENSC1 Corporation An Envrr, nr aental Service Company
Table of Contents
1. Introduction ........
1.1 Objectives of the Corrective Action Plan
1.2Site History ........�..•.�»••••
2. Soil and Groundwater Sampling. Analysis and Results
2.1 Impacted Soils ...... . .
2.2 Impacted Groundwater ... ..
3. Scope of Work . , ........ , ... . ......... u . • • • » ..
4. Design and Operation of the Groundwater Remedial Action System
4.1 Target Clean-up Concentrations , ...... .. • • • .
4.2 Proposed Groundwater Recovery and Treatment System .
4.2.1 Groundwater Recovery Wells ........ .. ,
4.2.2 Recovery Pumps ...
4.2.3 Air Stripper and Activated Carbon .. , . , ....
4.2.4 Treatment System Effluent Discharge ........ .
4.2.5 Air Emissions Considerations • ; .. .
4.2.6 Recovery Well Capture Boundaries and Draw -down
4.2.7 Recovery Well Placement and Pumping Rates
4.3 Proposed In -Situ Impacted Soil Treatment System
4.3.1 Soil Vapor Extraction Wells ......... , .. • . • ,
4.3.2 Soil Vapor Extraction System ........ • ... .
4.3.3 Air Emissions Considerations .. , .. • .
4.3.4 Vapor Extraction Analysis and Remediation ... .
1
1
1
4
5
5
11
12
12
14
14
15
16
16
18
19
19
19
20
20
5. Follow-up Site Monitoring and Evaluation
of the Remedial Action Systems .. ..... ... • . • .... • . , .. • .. 21
5.1 Evaluation of Groundwater Remediation ............ 21
5.2 Evaluation of In -Situ Soil Remediation .. ... • . - • • • • - . 22
Appendix A: Operating Characteristics and Performance Standards
Appendix B: Sample Calculations
Attachment 1: Corrective Action Plan Amendment
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ENSCI Corporation An Environmental Service Company
1. Introduction
Grinnell Fire Protection Systems Company (Grinnell) contracted ENSCI Corporation to
develop this Corrective Action Plan for their Cleveland, North Carolina facility, where
impacted soil and groundwater exist as a result of releases from an underground storage
tank system. This Corrective Action Plan (CAP) has been formulated in accordance with
guidelines of the North Carolina Department of Environment, Health & Natural
Resources (NCDEHNR), Mooresville Regional Office.
1.1 Objectives of the Corrective Action Plan
The goal of the CAP is to develop a scope of work to remediate the impacted soil and
groundwater in the shallow, unconfined aquifer beneath. the Grinnell facility to levels
acceptable to the NCDEHNR, Division of Environmental Management and to Grinnell.
1.2 Site History
The Grinnell facility is located southeast of the Town of Cleveland in Rowan County,
North Carolina (see Figure 1). The Town of Cleveland and surrounding areas are
sparsely populated and support agricultural, residential, and light industrial usage, with
agriculture as the dominant element.
In 1991, Grinnell. contracted ENSCI to perform the closure and required assessment of
two 2,000-gallon USTs and one 10,000-gallon UST (see Figure 2). Table 1 illustrates
the designations which were assigned to the USTs and their former contents.
Table 1, Closed Underground Storage Tanks
UST Designation
Size (gallons)
Contents
2,000
2,000
10,000
gasoline
gasoline
112 fuel. oil
UST #1 and UST #2 were removed, closed, and assessed in March 1991. The actions
and findings associated with these tasks are documented in ENSCI's April 1991 UST
Closure and Assessment Report. The .10,000 gallon tank, UST #3,, was closed in -place
6/ 5/92
119 2-04 1

TOPOURAPHICAi, MAP
GRINNEI L FIRE PROTECTION SYSTEMS
CLEVELAND, NORTH CAROLINA
TA1N FROUL
USGS CLEVELAND 7.5 MINUTE QUADRANGLE
SCALE 1:24000
ROAD CLASSIFICATION
HEAVY-DUTY --
MEDIUM-DUTY m -00
LIGHT -DUTY
FOOT TRAIL - ---
WGN & JEEP TRACK
OOR MOTOR ROAD
DU,S. ROUTE
Q STATE ROUTE
INTERSTATE ROUTE
GRIN EhIJ FIRE PROTECTION SYSTEMS
TOPOGRAPHICAL MAP

ENSCI Corporation An Environmental Service Company
in January 1992, This activity is documented in ENSCI's February 1992 UST Closure
Report, which was submitted to Mooresville Regional Office of the NCDEHNR„ Division
of Environmental Management, Groundwater Section.
During the removal and assessment of UST #1, no evidence of contamination was
indicated. During the excavation of UST #2, however, liquid petroleum hydrocarbon -
impacted soil indicated contamination,. Approximately 23 cubic yards of impacted soils
were excavated. The remaining impacted soils could not be excavated safely due to the
close proximity of the excavation to the building foundation.
As a result of the notification of petroleum hydrocarbon soil contamination, a Notice of
Violation (NOV) of the Oil and Pollution and Hazardous Substance Control Act, G.S.
143-215.94E, and Criteria and Standards Applicable to USTs, Title 15 of the North
Carolina Administrative Code (NCAC) subchapter 2N, was issued to Grinnell on June
13, 1991.
In order to comply with the requirements set forth under 15A NCAC 2N .0703 - .0706,
an Initial Site Assessment was prepared by ENSCI: The results of the Initial Site
Assessment Report, dated October 4, 1991, indicated impacted groundwater which
exceeds 15A NCAC 21, groundwater quality standards as well as limited petroleum -
impacted soils,
A total of 10 monitoring wells and 5 soil borings were installed during the multi -phase
investigation in order to determine the vertical and horizontal extent of impacted soil and
groundwater. The results of all investigations conducted to date were summarized in .the
Grinnell Comprehensive Site Assessment (CSA) Report dated March 3, 1992. A copy
of this report was also submitted to the Mooresville Regional Office of the NCDEHNR,
Division of Environmental Management, Groundwater Section.
Subsequent to the CSA report, the NCDEHNR directed Grinnell to provide supplemental
information. In order to comply with the direction, ENSCI performed additional site
actions and assembled a Comprehensive Site Assessment Amendment, which is included
as Attachment 1.
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ENSCI Corporation An Environmental Service Company
2. Soil and Groundwater Sampling, Analysis.
and Results
Liquid petroleum hydrocarbons from the underground storage tank system have impacted
both soil and groundwater at the Grinnell site. As seen in Figure 2, the area of concern
is located on the west side of the Grinnell manufacturing building. Preexisting UST #2
is the suspected source of the contaminants.
The following sections discuss the nature and extents of identified impacted soils and
groundwater.
2.1 Impacted Soils
ENSCI was unable to remove all petroleum hydrocarbon -impacted soils, detected during
the excavation and removal of UST #2, due to the close proximity of the building
foundation. In order to assess the extent of remaining impacted soils, five soil borings
(SB-1, SB-2, SB-3, SB-4, SB-5) were installed and six hand-augered samples (2, 2A, 3,
3A, 3B, and 3C) were collected proximal to the contaminant source area (see Figure 2).
Soil sampling procedures and copies of the original analytical reports are included in the
Grinnell Comprehensive Site Assessment report.
Vertical and horizontal profiles were constructed utilizing soil sampling analytical results
and geologic data. Figure 3 graphically depicts a surface projection of the approximate
area containing soils which exceed 100 parts per million total petroleum hydrocarbons.
Petroleum -impacted soils are thought to extend to the water table. This is supported by
the detection of petroleum hydrocarbons in the groundwater beneath the site.
2.2 impacted Groundwater
To date, ENSCI. has installed a total of 10 monitoring wells at the subject site.
Groundwater samples have been procured and analyzed under EPA Methods 601 +
MTBE, 602 + Xylene, 602 for Diisopropyl Ether, and 625. Groundwater sampling
procedures are outlined in the CSA Amendment, included as Attachment 1.
Table 2 presents a list of all compounds and concentrations identified to date. Also
presented are the corresponding 15A NCAC 2L. groundwater standards for all compounds
listed. The standards presented represent the maximum allowable concentrations
permitted in North Carolina, class GA groundwater.
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EIVSCI Corporation An Environmental Service Company
Concerning those compounds for which no standards have been established, 15A NCAC
2L .0202 states that substances not naturally occurring and for which no standard is
specified shall not be permitted in detectable concentrations in Class GA groundwater.
As illustrated in Table 2, the existing groundwater analytical data indicates concentrations
of the following gasoline constituents in concentrations which exceed the 15A NCAC 2L
groundwater standards (or detection limits, as discussed above): Benzene, Ethylbenzene,
Methyl-Tert-butyl-ether (MTBF,), 1,2-Dichloroethane and total Xylene. Also detected
above 1.5A. NCAC 2L groundwater standards (or detection limits) were the following #2
Fuel Oil constituents: Naphthalene, Phenol, and Benzoic Acid.
The geometry of the impacted groundwater plume has been approximated based on
analytical data results for total BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes).
Figure 4 presents an isoconcentration map of the total BTEX concentrations, utilizing
the concentration detected in each monitoring well as a point for contouring. As
illustrated in the figure, preexisting UST #2 is the suspected source. Monitoring wells
MW-4, MW-6 and MW-7 have been used to define the no -impact boundary.
The distribution of the gasoline constituent benzene was also evaluated, due to its relative
mobility and 1 part per billion action limit. Figure 5 presents an isoconcentration map
based on the analytical data for Benzene. The boundaries of the Benzene contaminant
plume is similar to the plume derived froii the analytical data for total BTEX.
The vertical extent of groundwater impact has been. estimated utilizing vertical extent
well MW-5 analytical. data. Vertical. extent well MW-5 was positioned within the core
of the groundwater contaminant plume at an effective depth of 50 to 55 feet below grade.
For comparison of data concerning the depth of groundwater impact, :MW-5 is paired
with the nearby shallower well MW-A.
The .concentration of Benzene at 4.9 parts per billion in MW-5 is significantly reduced
from the 1,400 parts per billion concentration detected in adjacent well MW-A. Based
on a comparison of the Benzene data, the .vertical extent of the impacted groundwater is
thought to extend to approximately 55 to 60 feet below grade in this area.
et 5/92
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ENSCI Corporation
An Environmental Service Company
3. Scope of Work
Two main issues will be addressed by the Corrective Action Plan:
• The recovery and treatment of petroleum hydrocarbon -impacted groundwater
beneath the site, and
• Reduction of the Total Petroleum Hydrocarbons (TM) content of the impacted
soil in the vicinity of the preexisting underground storage tanks (USTs).
In order to address these objectives, a groundwater recovery system has been designed
to capture the groundwater contaminant plume, reduce the size of the plume in both
vertical and horizontal extent, reverse its migration, protect nearby water supplies, and.
reduce the concentrations of contaminants present in the groundwater.
Due to the location of the impacted soil proxiinal to the building, in -situ soil remediation
will be conducted utilizing a soil vapor extraction system. This system is designed to
extract volatile organic compounds from the soil, thereby reducing the Total Petroleum
Hydrocarbon concentrations to an acceptable level.
The soil and groundwater remediation systems are discussed in greater detail in
subsequent sections.
4. Design and Operation of the Groundwater
Remedial Action System
4.1 Target Clean-up Concentrations
ENSCI developed soil and groundwater remediation systems to meet target clean-up
concentrations for both soil and water. Table 3 lists the targeted compound
concentrations for groundwater constituents detected in the shallow aquifer beneath the
subject site. The concentrations which are illustrated in the table are based on
"Classification and Water Quality Standards Applicable to the Groundwater of North
Carolina," Title 15, North Carolina Ad.ministrative Code (NCAC) Subchapter 2L,
Section .0202, applicable to class GA groundwater.
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ENSCI Corporation An Environrnentai Service Company
Table 3, Targeted Groundwater Cleanup Levels
Compound
Benzene
Concentrations
Targeted Clean-up levels
1400 ppb
Ethylbenzene
490 ppb
Xylene (total)
-2 Dichloroethane
1➢© ppb
7 ppb
1 ppb
29 ppb
400 ppb
0.38 ppb
MTBE
86() ppb
Isopropyl Ether
Benzoic Acid
240 ppb
16 ppb
5 ppb
5 ppb
5 ppb
Naphthalene
2-Methylnapthalene
Phenol
99 ppb
50 ppb
5 ppb
5 ppb
28 ppb
5 ppb
The target clean-up level for in -situ treatment of petroleum -in pac.ted soils is 10 parts per
million Total. Petroleum Hydrocarbons. This target level is based on the action level.
proposed in the NCDEHNR publication "Guidelines for Remediation of Soil
Contaminated By Petroleum."
It may be necessary to reestablish final groundwater and/or soil cleanup levels through
negotiations with the NCDEHNR after the remedial action systems are activated. These
negotiations may include applications to the NCDEHNR for variances from established
North Carolina groundwater and/or soil quality standards.
4.2 Proposed Groundwater Recovery and Treatment System
The groundwater recovery system for the site will consist of three groundwater recovery
wells, three submersible electric environmental pumps, and a pump control panel. The
pumps will withdraw impacted groundwater from the shallow,unconfined aquifer and
pump it into the recovered -groundwater treatment system. The treatment system will
consist of a packed -column air stripper, followed by granular activated carbon designed
for a maximum flow rate of 10 gallons per minute.
6? 5192
4°I92-043

MANIFOLD
FLOAT
SWITCHES
RECOVERY
PUMPS
AIR
STRIPPER
CIQ GATE; BALL
VALVE
SUM
KE
PRESSURE
SWITCH
ATER
COI\ T ROL
PANEL
FLOAT
SWITCH
ELECTRICAL
CIRCUIT
SILT
CARBON
ABSCRBRS
CORPORATION
HIGH POINT. NORTH CIROLISA
GRINNELL FIRE PROTEC'TIO€° SYSTEMS
4TTLE GROUNDWATER RECOVERY &
TREATMENT SYSTEM
Dim NAM GRIN3
JOB 19'S91

ENSC1 Corporation An Environrnen 1 Service Company
The groundwater recovery and treatment system is illustrated schematically in Figure 6.
Particulars for individual components of the system are discussed in the following
sections.
4.2.1 Groundwater Recovery Wells
Three 50-foot recovery wells will be installed at the subject site. Recovery wells will
consist of 4-inch Schedule 40., flush -tread PVC pipe inserted into 10-inch diameter bore,
holes. The lower 35 feet of well will consist of manufactured well screen with 0,020-inch
slots. Medium to coarse washed sand will be place in the annular space of the recovery
well to a level approximately 1 foot above the top of the screen., with a 1-foot bentonite
seal positioned a top the sand pack. The annular space above the bentonite seal will be
grouted with portland cement to the ground surface. A flush -mount steel vault with a
bolt -down cover will be cemented over the top of the well head, The vault is designed
to protect the well head and the ancillary tubing for the submersible pump.
4.2.2 Recovery Pumps
Three electric pumps will be used to draw impacted groundwater into the well and pump
it to the water treattnent system. The pumps will be Grundfos Model 5E5, 1/3
horsepower, submersible environmental pumps.
The control panel for the pumps will be located near the treatment system. Remote
control valves and liquid level controls for the recovery pumps will be located in the
recovery well vaults.
Discharge hoses for the pumps will be routed from the recovery well vault to the
treatment system through buried, sealed 4-inch diameter PVC pipe. The electrical conduit
lines for each pump will be routed from each well to the control panel through. separate,
sealed 4-inch diameter PVC pipes. The pipes will be buried approximately 2 feet below
the ground surface to minimize the potential for freezing during the winter months:
Operational characteristics and performance standards provided by the recovery pump
manufacturer are included in Appendix A.
4.2.3 Air Stripper and Activated Carbon
The volatile organic compounds (VOCs) detected in the groundwater are readily.
removable by air stripping. Air stripping is a common, widely accepted technology for
removing VOCs from water. It appears to be the most efficient and cost-effective
technology currently available to remove these compoundsfrom recovered groundwater
at the Grinnell site.
ei sia2
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ENSCI Corporation An Environmental Service Company
An Air Stripping Tower manufactured by ENSCI Corporation will be utilized to reduce
the concentrations of VOCs in the recovered groundwater. The air stripping unit is
designed for a maximum flow rate of 10 gallons per minute. The expected total flow rate
is estimated at 4.5 gallons per minute. The predicted efficiency of the system is 99%
(based on performance data), with a predicted effluent quality of less than 1.33
micrograms per liter of BTEX.
The treated effluent from the air stripping unit will pass through two sets of three
activated carbon canisters prior to discharge. The purpose of the carbon is to assist in the
removal of the less volatile organic compounds typically associated with diesel fuel (i.e.
Phenol, Naphthalene, and 2-Methylnapthalene), 'Technical data for the activated carbon
canisters is provided in Appendix A.
Note that the detected concentrations of Phenol, Naphthalene, and 2-Methylnaphthalene,
as illustrated in Figure 2, are relatively low (each less that 1 part per million). Based
on these levels, it may be possible to discharge the air stripper effluent to a Publicly
Owned Treatment Works (POTW) without the step of passing through the carbon
canisters. The practicality of this option should be considered, as it could represent an
appreciable cost savings.
4.2..4 Treatment System Effluent Discharge
Several options exist for the discharge of the effluent from e groundwater treatment
system. Options include:
• Discharging the treated effluent to the Town of Cleveland Municipal Sanitary
Sewer (POTW)
• Returning the treated effluent to the aquifer through an onsite infiltration gallery
• Partial discharge and use of the treated effluent within the Grinnell industrial
water processes.
The possibility for obtaining a permit for discharge to the POTW has been broached with
the Town of Cleveland, which is currently investigating the subject. No official response
has been made to date. It should be .noted, however, that additional permitting
information has been requested from the Town of Cleveland POTW. Until this
information is available, an evaluation of the practicality and cost-effectiveness of this
option cannot be completed. Additional time is warranted to further an evaluation of this
option.
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ENSCI Corporation An Environmental Service Company
Discharging of the treated groundwater effluent to the subsurface through the utilization
of an onsite infiltration gallery will require issuance of a Non -Discharge permit from the
NCDEHNR.
If the infiltration gallery or POTW cannot accommodate the entire volume of treated
effluent, it may become reasonable to utilize a portion of it within the Grinnell industrial
water system. Permitting with respect to this option has not been completely addressed
to date. This option will be evaluated on an as -needed basis.
4.2.5 Air Emissions Considerations
The Town of Cleveland and surrounding areas Ioc1ied in Rowan County, North Carolina
are not listed as air quality non -attainment zones. Therefore, an air emissions permit_ is
not currently required. However, the North Carolina, Department of Environment,
Health & Natural Resources (NCDEII„NR), Air Quality Section, requests that it be
notified of activities producing such air emissions. Details of the groundwater air
stripping operations will be forwarded to the Air Quality Section prior to system startup.
4.2.6 Recovery Well Capture Boundaries and Draw -down
Groundwater flowing toward the proposed recovery wells and within the capture zone
boundary will be drawn into the recovery well and pumped to the treatment system.
The methodology which has been employed to calculate the capture zones is described
below. The calculated capture boundaries/ recovery well radius of influence are
superimposed on the contaminant plume isoconcentration map in Figure 7. The recovery
well radius of influence has been calculated utilizing the .following equation derived from
Darcy's Law:
Q = 27rrKDi
where: Q = flow rate from the well
K = hydraulic conductivity (per slug lest results
r = radial distance from the center of 1he e
D = thickness of the aquifer
i= hydraulic gradient.
The above formula assumes the attainment of steady-state conditions during pumping.
The values for hydraulic conductivity (K) were determined during recent well slug test
evaluations. Each calculation of the radius of influence attained by each recovery well
was performed utilizing the calculated hydraulic gradients and hydraulic conductivities
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ENSC/ Corporation An Environmental Service Company
from wells in the vicinity of the proposed recovery well location. Appendix B contains
sample calculations.
An estimate of the draw -dawn in a pumped recovery well can be predicted by using the
Theirn equation for unconfined aquifers' solving for h':
Q = 7rK(11 h 1
In (r2/r,;
where: Q = discharge (defined above)
K hydraulic conductivity
hi, height of the water column in the well at stable pumping condition
h2= thickness of the aquifer
r, = diameter of the bore hole
r2= radius of influence from the pumping well
Please note that the Theirrr .Equation is intended for use with an aquifer pump test.
Table 4 presents the calculated values for estimated recovery well radius of influences
and estimated well draw -down based on the specified pumping rates.
Recovery Well #
R.i
Table 4
Pump Rates
(gpm)
RW-2
RW-3
1.00
�.75
1.75
tadius of lr fluence
121 ft.
106 ft.
Draw -down
1.6.9 ft.
20.1ft.
7.2 ft.
4.2.7 Recovery Well Placement and Pumping Rates
Groundwater recovery wells RW-1, RW-2, and RW-3 will be installed on the west side
of the facility as seen in Figure 7. Based on the calculated values of hydraulic
Bouwer, H., Groundwater U-lydroloey. McGraw -MI Book Company, New York, New York ('t978)
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ENSCI Corporation An Environmental Service Company
conductivity, recovery well radius of influence, and aquifer draw -down, recovery wells
RW-2 and RW-3 will be pumped at 1.75 gallons per minute, while 'RW-1 will be pumped
at 1.00 gallons per minute in order to capture and remediate the contaminant plume.
The recovery well pumping rates arid dimensions of the capture zone are approximate
and will be adjusted once a pump has been installed and an aquifer pump test is
conducted. Conducting the pump, test during the initial system start-up phase is quite
functional. It provides a cost-effective evaluation of pumping rates and the actual
geometry and dimensions of the capture zone. It is proposed that during the ,pump test,
the pumped groundwater should be treated by way of the air stripper and discharged
discharge to the POTW.
4.3 Proposed in -Situ Impacted Soil Treatment System
Soils impacted by liquid petroleum hydrocarbons will be remediated utilizing in -situ soil
vapor extraction. The system will utilize one existing monitoring well, two additional
vapor extraction wells and one soil vapor extraction pump.
4.3.1 Soil Vapor Extraction Wells
Two 20-foot vapor extraction wells and one existing monitoring well will be .utilized to
extract soil vapor at the subject site. The vapor extraction wells will consist of 2-inch
Schedule 40, flush thread PVC pipe inserted into 10-inch diameter bore holes. The lower
10 feet of well will consist of manufactured well screen with 0.010-inch slots. Medium
to coarse washed sand will be place in the annular space of the recovery well to a level
approximately 1 foot above the top of the screen, with a 1-foot 'bentonite seal positioned
a top the sand pack. The annular space above the bentonite seal will be grouted with
portland cement to the ground surface.
A flush -mount steel vault with a bolt -down cover will be cemented over the top of the
well head. The vault is designed to protect the well head and ancillary plumbing.
Schedule 40 flush thread, 2-inch diameter PVC piping will be utilized to connect the
vapor extraction well head to the vacuum pump. The PVC pipe will be buried
approximately 2-feet below the ground surface to prevent accidental damage.
4.3.2 Soil Vapor Extraction System
The soil vapor extraction unit will consist of one 6 horsepower vapor extraction pump
with an aluminum moisture trap. This unit is capable of producing a vacuum of 90 inches
of water and up to a 260 standard cubic feet per minute (SCFM) vacuum. A triple -port
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ENSCI Corporation An Environrnental Service Company
manifold will be utilized to disseminate and equalize the vacuum pressure drawn from
each vapor extraction well. The extracted soil vapors will be emitted to the atmosphere
by means of a vertical, 2-inch diameter, Schedule 80 PVC exhaust pipe.
4.3.3 Air Emissions Considerations
As previously mentioned, the Town of Cleveland and surrounding areas located in Rowan
County, North Carolina are not listed as air quality non -attainment zones. Therefore, an
air emissions permit is not currently required for the soil vapor extraction system.
However, the North Carolina, Department of Environment„ Health & Natural Resources
(NCDEHNR), Air Quality Section, requests that it be notified of activities producing
such air emissions. Details of the soil venting operations will be forwarded to the Air
Quality Section prior to the initiation of operations.
4.3.4 Vapor Extraction Analysis and Remediation
The effectiveness of any soil venting operation depends significantly on three factors:
vapor flow rate, vapor flow path relative to the contaminant distribution, and the
composition of the contaminant.
Existing soil analytical data indicates that soil contaminants are gasoline -related petroleum
hydrocarbons, predominantly Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX).
Bench -scale and field testing indicate that the in -situ treatment of petroleum contaminated
soils is a viable remediation option, best suited for soil contaminated with the low boiling
point petroleum distillation product such as gasoline. This is thought to be a function of
the increased concentration of volatile organic compounds which are most susceptible to
vapor extraction.
During May, 1992, ENSCI conducted a field test evaluation of the effectiveness, of soil
vapor extraction at the subject site. Field tests were performed to estimate potential vapor
fiow paths and rates. Testing was conducted utilizing a 1-horsepower, 4.0 SCFM vacuum
unit, and three vapor extraction well stations, A 40 SCFM vacuum load was place on one
well head, starting at time zero. Manometers (pressure gauges) were connected to the
other two monitoring stations (well heads), which are located, approximately. 10 and 20
feet from the well with the vacuum load. Manometer readings (vacuum pressure) were
noted at regular intervals at each vacuum monitoring station. Monitoring continued until
steady-state conditions were approximated.
The effects of the known pressure (vacuum) applied at a point a known distance from the
monitoring stations, and the respective changes in the detected vacuum per unit time at
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ENSCI Corporation An Environmental Service Company
a specified distance, permits an valuation, of theeffectiveness of vapor extraction within
a given soil media.
The result of the initial field evaluation indicated that a unit capable of applying a 40-inch.
water .vacuum with a 45 SCFM flow rate can influence soil vapor flow, in an area within
a 20-foot radius of the vapor extraction well..
Figure 8 illustrates the location of the proposed vapor recovery wells and the estimated
radius of influence for each well.
5. Follow-up Site Monitoring and Evaluation
of the Remedial Action Systems
5.1 Evaluation of Groundwater Reniediation
Following activation of the groundwater recovery and treatment system, a monitoring
program will be initiated in order to assess the effectiveness of the Remedial Action
System.
The monitoring program will include the fallowing elements:
• Field measurements of the groundwater levels in the monitoring wells to verify
the actual dimensions of the groundwater capture zones.
• Measurements of flow rates from the recovery wells to the treatment system to
evaluate pump placement and efficiency,:
• Sampling and laboratory analysis of groundwater quality from the monitoring
wells to document the recovery and remediation of the groundwater contaminant
plume.
• Sampling and analysis of groundwater front the following three select points along
the treatment system: (1.) the air stripping tower influent, (2) the air stripping
tower effluent, and (3) the final discharge 'following the carbon canisters.
• Reporting of results and findings of all evaluations to the NCDEITNR.
Laboratory analyses will include testing for the following volatile organic compounds:
Benzene, Toluene, Ethylbenzene, and Xylerie using EPA methods 601 and 602, and for
semi -volatile organic compounds using EPA method 625.
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ENSCI Corporation An Environmental Service Company
Groundwater level measurements and sampling will be conducted during system startup,
weekly during the first month of system operation, monthly through the first quarter, and
quarterly thereafter. The effectiveness of the remediation will be re-evaluated after each
sampling and testing episode to monitor the effectiveness of the groundwater recovery
system and groundwater treatment system. Adjustments to the recovery pump flow rates
may be required to optimize the contaminant capture. During the re-evaluation of the
treatment system, other adjustments may become necessary to optimize constituent
removal efficiencies.
5.2 Evaluation of In -Situ Soil Remediation
Following activation of the soil vapor extraction system, the following measures will be
initiated as a program to assess the effectiveness of this soil remediation system:
• Two soil samples will be collected following startup at 6 and 12 months. Samples
will be collected just above the water table, one within the estimated greater than
100 ppm total petroleum hydrocarbons (TP11) zone, and one within the estimated
greater than 10 parts per million TPH zone. The procured samples will be
analyzed for TPH using EPA methods 3550 and 5030.
• The results of the sampling and analysis of the impacted soil will be documented
to assess the effectiveness of the system at reducing the TNT concentration level
in the impacted soil.
• Results and findings of all evaluations will be reported to the l'ICDERNR.
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GRINNELL CAP
EQUTPMENT LIST AND SPECIFICATIONS
RECOVERY PUMPS
Three (3) Grundfos Model 5E5, .U3 horsepower submersible environmental pumps with
25' leads.
.2 GROUND WATER TREATMENT SYSTEM:
Description: Skid mounted, factory assembled, system with recovery pump controls,
influent control manifold, air stripper, sump, carbon filtration system, automatic controls,
utility building.
1 ides;
Skid.; 6' x 101 all aluminum skid constructed of rectangular aluminum tubing with 3/16"
treadplate decking.
.Utility:Buildingi 6' x 6' x 6' tall corrugated aluminum building mounted on skid with
double doors and 110 volt auxiliaryelectrical outlet, factory wired.
Recovery Pump Manifold;. One manifold for six Grundfos pumps. To include a check
valve, gate valve, pressure gauge, sample tap, and water meter for each pump,. To be
mounted inside utility building for freeze protection.
Air Stripper; 14" diameter x 20' tall packed tower. Constructed of PVC, coated with
fiber reinforced polyester and a U.V. inhibitor. Air stripper will be packed with 2."
diameter Jaeger "Tri-Packs". An separate 4' tall base/sump is included to provide
gravity flow out of the air stripper. The air stripper will also include an
observation/clean-out port, a mist eliminator„ blower air inlet fitting, packing support,
base/sump clean -out, 3-piece union for connecting water inlet line, base mounting flange,
effluent sa.mple tap, solid -cone spray nozzle for liquid distribution, 1/2 horsepower TEFC
centrifugal spark -proof pressure blower, blower -pressure gauge, air flow control valve„
and blower -pressure switch. The base/sump, blower, and associated piping, wiring,
controls will be factory installed. The air stripper tower must be erected, bolted to the
base/sump, connected to the dosing pump, loaded with packing, and anchored with guy
wires .after delivery to the site.
iftinuSstenu Includes 1.85 gallon high density cross -linked polyethylene tank
pump-on/pump-off float switches, overfill float switch, inlet/outlet fittings, drain
fitting and valve, removable top, 3/4 horsepower explosion proof centrifugal pump;
check value, control valve,pressure gauge, installation on skid, piping, wiring.

Silt Filter, Two cartridge filters with 100 square foot surface area each installed in
utility building to prevent. freezing.
Carbon Adsprbers: Six high pressure fiberglass carbon vessels installed i.n utility
building to prevent freezing. System includes six pressure gauges, six sample. taps, and
quick connectors. Carbon vessels are 12" x, _52", rated at 75 psig, containing 95 ibs of
activated carbon, rated at 5 gpm each.
Discharges Water Meter: Totalizing turbine water meter.
Control. System: NEMA 4X enclosure with controls for six (6) Grundfos 5E5 pumps,
and the carbon dosing pump. Includes power supply providing intrinsically safe signals
to the air stripper pressure switch, sump float switches, and recovery well float switches.
Starts/stops recovery pumps to maintain water level in wells between upper and lower
float switches in wells. Also stops all recovery pumps upon blower failure or sump
overfill. Not explosion proof asquoted. Mounted more than 18" above floor in utility
building.
AIR STRIPPER
(1) DESCRIPTION: [See figures titled "Air Stripper (Tower)"" and "Air Stripper
(Base)'"]
The air stripper consists primarily of a 24' foot tall x 14" diameter packed tower,
with a blower, and the dosing system described above.
The purpose of the air stripper is to remove volatile compounds from water by
cascading the water downward through the packing in the tower while blowing,
air upward through the tower.
The air stripper process begins with water continuously being pumped into the air
stripper from submersible pumps in recovery wells. A spray nozzle is used to
distribute the water evenly across the top of the tower packing. The water
cascades downward through the packing, which distributes the water to maximize
the surface area exposed to the air flow. After passing through the packing, the
water collects in a sump at the bottom of the air stripper and flows out of the
sump via an inverted gravity drain outlet.
Air for the process is provided by a blower which forces the air upward through
the packed tower. As the air flows countercurrent to the cascading water,
dissolved volatile compounds are transferred from the water to the air and
discharged into the atmosphere.

(2) PECI I ATI
Maximum Average Flow:
Pumping Rate:
Packing Type:
Packing Height:
Air Stripper Diameter:
Air Stripper Height:
Liquid Loading Rate:
Air/Liq
Spray Nozzle:
st Ilirtinatr
Materials of Construction;
Pump(s):
Blo
Instrtrr et) t ti rt ' trots .
Predicted ciei ey
Predicted EfEffluent Quality:
Predicted Discharge r°ge to
usphere
10 gpra
20 gpt
2" Dia. Jaeger "Tri-P ks°'
17.5'
14"
24'
1.7 gprnift.2
270 cfm
1
Solid Cone, 1 0' spray angle
of Erik .nn t t yl rt matting
• PVC r
g
dfos Model
submersible recovery pumps
V. inhibit r
Lockwood I -, 1/2 HP (see
lnelrtd d product information
sleet)
► Blower pressure switch stops
system operation upon loss
of pressure
9 9.% (supplied by`
zrt rtufacturer
ug/L fITEX
(supplied by manufacturer)
.1 Ibd.y of BTEX
(supplied by manufacturer)

MOUNTING FLANGE
14' PVC DUCT PIPE
3' PVC SCH 0O DISCHARGE
COUPLING (WELDED)
BLIND FLANGE
R' CLEAN -OUT
AIR STRIPPER BASE
NOT TO SCALE
GRIN4
C ©R P O R A T I O N
HIGH POINT, NORTH CAIIOLINA KIYr EQDFI
S91©28A
AIR STRIPPER BASE

WATER FROM
DOSING PUMP
14' DIA. PVC DUCT
PACKING SUPPORT
GRID `o
Cf9RPOF AT ON
IICCC POINT, NCIIt'CH CAROUNA
/R TAINING GRID
j/ (REMOVABLE)
MIST E
SECTION (FJILLUED
WITI1 1' IA.
PACKING)
BLIND FLANGE
CLPVICICOVERN
10' DIA. PVC DUCT
AIR STRIPPER TOWER
NOT TO SCALE
NNE!, 1. FIRE PRQTECTICIN SYSTEMS
182N r ©Y: IiRc I�f l:
D� GRIU4
Cft FQfiH .__.SATE: 6
f2 f 92
G FLANGE
AIR STRIPPER TOWER

VAPOR EXTRACTION UNITS
STAN©ARt3 FEATURES;
2' X 4' Aluminum Skid Aluminum Moisture Trap
Air Filter Control Valve
Stainless Steel Gauges Galvanized Steel Piping
2" PVC Intel Connection 10' PVC Stack
25' SOW Power Cord ONOtt Switch, >18' a.g.I
OPTIONS:
Automatic Overfill Shutoff
Sampling Attachment
Explosion Proof Controls
Carbon Adsorbers
FREE AJR F
FREE AIR ROW lm'It0
A
Automatic Drain
Pilot Tube Flow Meter
Motor Starter
Larger/Custom Units
4
12
FREE Am FLOW ICFM)
FREE AIR FLOW (CFMI
T
Model P124
Motor horsepower 1,0
Motor EnclosureTypeXP
Voltage 115/2.30
Phase 1
htax. Vacuum din. a"star} 4$
Max. Pressure (tn. walcr) 52
MinJdltax. Continuous SCF20/92
Min./Max, Continuous SCt^Crt"tar 15r811
P224
2_0
XP
i1230
Phase 1
Max. Vacuum (lu, warn) 60
Max. Pressure (In. water) 60
Min/Max Continuous 5CF11[, Press. 851160
A1inJ��tax. Continuous SUM, Vac. 4511.45
P624
6.0
e Type XP
Voltage 208-2301460
3
Vacxwm (In. avatar) 90
'res re 1n, �=tiler) ltKl
Contirnsous 5 1'h1, Tres t illi3tt0
Continuous CI; Var.. 90/260
P©UT:ION EQUIPMENT : {; MPANY, IN .
919-452-5663 22041 OL.OAG`[ON, NC 28405
919-452-4195

Sample Calculations
Recovery Well RW-1
The recovery well radius of influence have been calculated
utilizing the foli©wing equation derived from Darcy's Law:
Q = 2wr.KDi
The above formula assumes the attainment of steady state conditions
during pumping. The values for K were determined during recent well
slug test evaluations.
Q = 21rrKDi
Assume:
0
Q = 1.00 gpm
K = 0.002014 gpm/ft2
D = 35 ft.
0.02 ft/ft
Solution: r = 112.9 feet (calculated radius of influence)
An estimate of the draw down in a pumped recovery well can he
predicted by using the Theim equation for unconfined aquifers and
solving for h':
where :
Q == gr K h22.�,.-
in
Q = 1.00
K = 0.002014
h, to be solved for
h2= 35 ft.
r,= 0.416667 ft. (10 inch diameter)
r2= 112.9 ft. (solution from above)
8.1 ft.
Therefore, draw down = 35.0 ft. - - 18.1 ft. = 16.9 ft.
Please note, the Theim Equation is intended for use with. an aquifer
pump test.

Sample Calcu a ions
Recovery Well
The recovery well radius 1 in "luenee have een calcunated
u ili in r the followim equation eri ed from Da cy's Law:
2rrKDi
The above formula assumes the a ainment of t:eady state conditions
during pumping. The values for were determined during recent well
slug test evaluations.
r
Assume
- 1.75 5 'pm
0.002183 p./tt
D = 35 ft.
.03 f t
So
9
277Ebil
feet (calculated culated radius of influence)
An estimate 0 e draw down in a pumped ecovery well can be
predicted by us ing he Theim equation for unconfined ed aquifers and
solving for h.'
where
75
0.002183
hs to be solved
2- 5 ft.
ri== 0.41 t. (10 inodiameter)'_
r 121.5 ft. (solution from above)
i = 14 .9
Therefore dra dew 5.0
for
Please note, he TheimEquation 1
pump test.
intended d
20.1
use
an
qui

Sample Calculations
Recovery Well RW-3
The recovery well radius of influence have been calculated
utilizing the following equation derived from Darcy's Law:
Q = 2 ar rKD i
The above formula assumes the attainment of steady state conditions
during pumping. The values for K were determined during recent well
slug test evaluations.
Q = 2rrrKDi = > r = 0
2irKDi
Assume:
Q = 1.75 gpm.
K = 0.002183 gpm/ft2
D = 30 ft.
i = 0.04 ft/ft
Solution: r = 106.3 feet (calculated radius of influence)
An estimate of the draw down in a pumped recovery well can be
predicted by using the Theim equation for unconfined aquifers and
solving for h°:
Q = tah22. ~ h,a
1 n (rx+ r° )
where : Q = 1.75
Ili = 0.002183
h°3 to be solved for
h2= 30 ft.
r,= 0.416667 ft. (10 inch diameter)
r2= 106.3 ft. (solution from above)
22.8 ft.
Therefore, draw down = 35.0 ft. - 22.8 ft. = 7.2 ft.
please note, the Theim Equation is iended for use with an aquifer
pump test.

Comprellermive
Nor
rite
Cie
Carolina Depart rit
ENSCI Corporation
1108 bald `l rca ‘='ill lcad
High Point, card rslir27260
(? 883-7505
Fir Protecti
el North
Prepared for
Irortriterit, Hea
Regional Office
„ th Ciaroliria
dr nurd B. Henriqueis
cirulult

ENSCI Corporation
An Environmental Service Company
Table of ontatits
1. Scope of Work
2. Groundwater Sampling and Analysis . .
3. Vertical Extent of Groundwater Contantinatiori
4. Slug Test Results
ca. 4, gel
2
119 2-043 11 61 3192

ENSCI Corporation An Environmental Service Company
1 Scope of Work
In response to a request for additional information dated March 12, 1992 and directed
to Grinnell Fire Protection Systems (Grinnell) from Luis Turner of the North Carolina
Department of Environment, Health & Natural Resources (NCDEHNR.), ENSCI
Corporation was contracted provide .supplemental information with regard to the
Comprehensive Site Assessment report. The letter indicated that Grinnell was required
to take the following actions:
• Resample monitoring wells MW-3, MW-4, MW-6, and MW-7 and analyze for
isopropyl ether.
• Remediate or define the vertical extent of groundwater contaminants.
In accordance with the NCDEHNR req nrements, ENSC1 has conducted the additional
groundwater sampling and analysis and has prepared a Corrective Action Plan (CAP) for
the remediation of soil and groundwater at the subject site.
In addition, this Comprehensive Site Assessment Amendment includes the :results of two
slug tests which ENSCI conducted as a preliminary evaluation of aquifer conditions.
2. Groundwater Sampling and Analysis
On April 20 1992, ENSCI collected groundwater samples from monitoring wells MW-3,
M.W-4, MW-6, MW-7 as requested by the NCDEHNR. .ENSCI utilized the following
monitoring weli sampling methodology at the Grinnell facility:
• Before samples were collected, the, well was purged of a minimum of three casing
volumes of water.
• Temperature, pH, and conductivity information was recorded during purging to
determine that representative, groundwater was being sampled.
• All purging and groundwater sampling was accomplished using VOSS single -
sample 36-inch long, I.6-inch diameter„ open -top bailers.
• During the purging and sampling operations, all. field technicians wore latex
gloves to .maintain sample integrity. Gloves were changed between samples.
ii92-043 1 6f 3192

ENSCI Corporation An Environmental Service Company
• All acquired samples were placed in amber glass containers and sealed with a
teflon-lined polypropylene cap.
The sample jars were then placed in a cooler with ice packs and maintained at 4 degrees
Celsius. A completed chain -of -custody form was sealed with the jars. The samples were
returned to ENSCI's office and transported to AnalytiKEM in Rock, Hill, South Carolina
for analysis under EPA method 602, (specifically analyzed for Diisopropyl Ether).
Analytical results, which are included as Appendix A, indicated no detectable
concentrations of Diisopropyl Ether in wells MW-3, MW-4, MW-6, and MW-7. These
wells define the no impact boundary for the groundwater contaminant. plume.
3. Vertical Extent of Groundwater
Contamination
In response to the required remediation or definition of the vertical extent of the
groundwater contaminant, plume, ENSCI has prepared a Corrective Action Plan (CAP)
which outlines the remediation of the vertical and horizonal, extent of groundwater
contamination. Reference the Grinnell CAP for groundwater remediation particulars.
4. Slug Test Results
On April 20, 1992, ENSCI conducted falling -head slug tests on monitoring wells MW-A
and MW-C. Utilizing the Hvorslev Method (see Appendix B), ENSCI calculated an
estimate of the hydraulic conductivity (K) at each well. Slug test results returned K
values of 1.47 x 104 centimeters per second at well MW-A and 1.37 x 104 centimeters,
per second at well MW-C. Calculations and Field IReports are included as Appendix B.
The calculated K values were utilized in the modelling of the capture zone and radius of
influence for each proposed recovery well.
10 2-04 3 2 G/ 3/9 2

An Am rPan NuKE Company
TEST .PORT NO821
May 1> 992
Prepared for:
ENSCI
1108 Thcmasvil :e Road,
High Point, NC 27260
Attention: Edward Henriques
Project: Gi l
Reviewed
Approved
Name:
AnalytIKEM Inc,
454 S. Andsrson Road DTC 532
Rock Hill, SC 297'30
803132 - 6 0

Sample air;
1V,. Methodology
, Aalyis
I. Quality dont
TAB * MI NTS
Pad

Test Report No. A82192
Page 1
I. Certification
AnalytliaM, Inc.
Current Certifications/Regulatory Approvals
ArialytiKEIVI
Tabulated below are the current laboratory certifications that are held by.
each AnalytiKEK Laboratory. Analyses performed at multiple AnalytiKEM
locations will be noted in the test report.
Cherry Hill, NJ
Rock H
State Cert #
Houston Anaiyticai, Tx
State Cert # State Cer
Arkansas
. Carolina 46067 N. Dakota R-006
Connecticut PH-0715
N. Carolina
Florida 880985G
New Jersey
316 'Oklahoma 8403
79795 Texas Water Commission *
'Massachusetts NJ117
Jersey 04012
Louisiana *
New York 10815
N, Carolina 258
N. Dakota R-038
Tennsylvania 68366
. Carolina 9 004
Tennessee 02908
Vermont
* No certification numbers are issued for these states.

Test Report No. A82192
Page 2
11. onof Terms
Term Definition
D Detected; result must be greater than zero.
DI Deionized Water
AtrialytiKEIbl
Compound. was detected at levels below the practical
quantitation limit. The level reported is approximate.
MS/MSD Matrix Spike/Matrix Spike Duplicate.
NA Analysis not applicable tothe sample matrix.
ND Not Detected
NR Not Requested
NTU Nephelometric Turbidity Units
RPD Relative Percent Difference
RSD Relative Standard Deviation
U Compound was analyzed for but not detected. The preceding number
is the practical quantitation limit for the compound_
ppb Parts -per -billion; may be converted to ppm by dividing by 1,000.
pprn Parts -per -million; may be converted to ppb by multiplying by
1,000.
Micrograms of constituent per liter of sample; equivalent to
parts -per -billion_
ug/kg Micrograms of constituent per kilogram of sample; equivalent to
parts -per -billion.
ug/kg dw Micrograms of constituent per kilogram of sample reported on a
dry weight basis.
CCC Calibration Check Compound; used to. verify the precision of a
GC/MS calibration curve.
SPCC System Performance Check Compound; used to verify the correct
operation of a GC/MS instrument.
PQL Practical Quantitation Limit; the minimum level at which
compounds can be dependably quantitated.
Analyze detected in associated blank as well as the sample,
It indicates possib.e/probable blank contamination_

Test Report No, A82192
Page 3
1II. Sam le Desi nat:ions
Analyt MEM
Client Date
Designation Designation Matrix Sampled
A82192-1 ID1-3 Aqueous 04/20/92
A82192-2 111,1-4 Aqueous 04/20/92
A82192-3 MW-6 Aqueous 04/20/92
A82192-4 1E4-7 Aqueous 04/20/95
tittE
Note: Samples will be held for 30 deYs beyond the test report date unless
otherwise requested.

Test Report No, A82192
Page 4
IV. Methodology
General Ode Cbtom890t88hv
Aromatic Volatile Organics
Aqueous
al
to-1(E
Method 602, Pur noble Axumntics, Federal Register, 00 GAR Part 136: 49, N
209, October 26, 1984.

Test Report No, A82192
Page 5
V, Anal kloml IlBsolts
General 0BromatoRk40MY
A
Sam le Designall2n
tittE
Method A82192-1 A82192-2
Parameter Blank MW -3 MW -4
Diisopropyl Eiher (DIPE) 3,0 U 3.0 II 3„0 U
Units (oR21) (ieg/i) ingili
Sample Mosi nation
Method A82192-3 A82192-4
Parameter Blank gw -6 MiT37
Diisopropyl the (DIME) 3,0 0 3,0 U 3,0 U
Units ("Ril) (ngil) iogili

Test Report No. A82192
Page 6
VI. Quality G(Intr°1 beta
General Ghtemetn ra h
Aqueous Matrix Spike/Matrix Bike Duplicate Recovery Data
algal&
Sample Spiked A82132 -1
control Limits
Amount Recovery Max.
Parameter of Spike MS MSD Epp Recovery Epp
Dlisopropyl Ether 20 79 91 1 70-130 30
Units (1)01l) (%) (%) (%) (%) (I)
Recovery: 0 out of 2 outside control lints
ETD: 0 out of outside control limits

Test Report Na„ A82192
Page 7
VL Quality Control Data (Cont'd)
General Chromate ra h
Aqueous Surrogate Recovery Data
Retro ate Recover
tittE
Sample e,e,e-Trifluoretoluene 1,Ch1oro -2 -Pluorebenzene
Designation f30 'Tapp Added) 30 ) b Added
Method ;lank 97 97
A.82139 -1 Spike 90 89
A82132-1 Spike Dup. 90 92
A82192-1 103 103
A82192-2 100 103
A89192-3 100 103
A82199-4 100 107
(%) (%)
Control Limits
70-130 70-130
out of 14 surrogate recoveries are outside control limits.

Anaiytit[
An American NuKEM Companyer--2/
Chain -of -Custody Record
Program Area: Drinking Water Wastewater Groundwater Solid and Hazardous Waste
Sample Collector: e'vid '!a
AnalyttKEIM Contact:
Client:
Project:.
SAMPLE
DESIGNATION
ITEM
NUMBER
TRANSFERS
RELINQUISHED BY
TRANSFERS
ACCEPTED BY
Laboratory
2324 Vemsdale Road
Rock Hill, South Carols a 2 7
[phone]
Fax: [phone]
REMARKS
DATE Tim
PIER
.0 b
Sales Office
454 South Anderson Road BTC 532
Rock Hill, South Carolina 2973
[phone]
Fax: [phone]
PARAMETERS
A
Associates 803-329-n00
Y
Yellow Client Copy

: csu1
Date;
AQUIFER UG
April 20, I992
Hvorslev Method
EST ' L ULJT1 NS
hyclr t llc on dt t vi y
r=0.083
0.083ft,
also sec. data graphs
2.,1
4.18 x l0' f day
417 c
cicness
a conductivi
ssrne 0i

or unconfinedaquifers, st �r tiv ty is usually taken to be equal to
e spec!. yield.Speed' c yield can be estitnated using the avera
grain size for the substrata 'ttrs, 1980).
0.7 (estimated)

�°mt, d'edµ2C' "ydi $it"

Lc
LI 31
1307
Li
Ylku,:1)
))4„ (r1)
I
1,,,, *Ni,") ..,,,,Loot, 1 .,.6, al-
ict,14,.6 4,3o
0 (3 Ted
0 el
133 Ilie)
1
444
<

ENSCI CORPORATION
SLUG TEST FIELD REPORT
JOB: Grinnell Fire Protection (#1192043)
BORING #: MW - A
DATE: 4-20-92
PERFORMED BY: E. Henriques, :t. Cranford
WELL CASING DIAMETER: 2"
SCREEN LENGTH: 45' - 20(25 ft)
DEPTH TO BOTTOM: 44'
STICK UP LENGTH: 20 - 0) 20 ft
REFERENCE POINT:
() GROUND SURFACE
(X) TOP OF CASING
(CHECK ONE)
TYPE OF TEST: (X) FALLING HEAD/ () RISING HEAD
STATIC WATER LEVEL BEFORE TEST:
ELAPSED
TIME
(min.)*
0
.25
50
.75
5
2
2.5
3
3.5
4
5
6
7
WATER
LEVEL
(ft.)
20,78 (Initial)
7,1
10.6
11.4
13.1
13.
14.88
15.84
16.62
17,22
17.7
18.48
19.00
20.78
STATIC WATER LEVEL AFTER TEST 20.70
*Adjust Times As Needed

..
BORING #
DATE:
PERFO ED BY: E.
ELAPSED
TIME
(min.)*
12
Grinnell Fire Prots
4- 20-9
I•i(itJ
WATER
LEVEL
19.'76
19.94
..07
20.
2
20.28
20.36
20..
20.50_
..
52
18 20.56
19 20.60
20 .1_
21
22 .
6)2
24
25
26
27
28
29
20.63
0.66
20,68
69
1,,7
.7
20,70
20.70
20.70
92043

AQ'E SLUG T
I r Itg Well:
April 20, 1992,
Method: livorslev Method
Date:
Formula
s
Tais
K = hydr.ull
r=0 0831t ,
0,083 ft..
= 25 ft,
To rni
t) see data
2.7 3t. l
day
p
7 x 10 cnlsee
ly est atd
T = b(K)
1 saturat
s
R1
c conductivity
chess oftle aquifer (assume
hydrant o .du tivi y 1 W 7 x 1 4

Storativity (S) =
For unconfined aquifers, storativity is usually taken to be equal to
the specific yield. Specific yield can be estimated using the average
grain size for the substrata (Fetters, 1980).
S = 0.07 (estimated)

�'J

ENSCI Cd: I : 'o ATION
SLUG TEST HELD REPORT
JOB: Grinnell Fire Protection (4192043)
BORING //: MW - C
DATE: 4-20-92
PERFORMED BY: E. Henriques, I. Cranford
SELL CASING DIAMETER: 2" REFERENCE POINT:
SCREEN LENGTH: 25' (40-15'1 () GROUND SURFACE
DEPTH TO BOTTOM: 38.5 (X) TOP OF CASING
STICK UP LENGTH: 15' (0-15')
TYPE OF TEST: (X) FALLING HEAR/ () R1SING IIEAD
STATIC WATER LEVEL BEFORE TEST: 18.48
ELAPSED
TIME
(min.)*
0
WATER
LEVEL
(fit..)
0
5'
2 11.4
2.5 13.5
3 14.6
3.5 15.7
4 16.2
4,5 16.72
5 16.64
5.5 16.68
6 16.8
6.5 16.92
7 .1.7.1
STATIC WATER LEVEL AFTER TEST
*'Adjust Times As Needed

SLUG TEST E I L1) REPORT
JOB: inn ll r Prot 1192043)
BORING :
DATE: 4-20-92
PERFORMED BY: E. Henriques, 1 .Cranford
APSED
TIME
7
8
9
1
12
13
14
15
16'
17
18
19
20
1
22
23
24
25
I 1
VEL
17.16
17.22
17.36
1,_
17.54
17.64
17,70
17.76
1'7.
1'7.86
17.91
17,96
1 .011
1.3_
1,06
18
6
8u 17
...APSED WATER
LEVEL
1fft.)
2619
27 1 ...1
18.23
1..3
18.26
18.28
18.30
18.30
18,30
14
18 34
5
8.35

g
State of North Carolina
Department of Environment, Health, and Natural Resources
512 North Salisbury Street • Raleigh, North Carolina 27604
James B. Hunt, Jr., Governor
january 14, 1993
Mr. Edmund Henriques
Project Manager
ENSCI Corporation
1108 'Thomasville Road
Lexington, North Carolina 272,60
Subject; Pretreatment Discharge Permit Preliminary Review
Grinnell Fire Protection System
Highway 70, Cleveland
Dear Mr. Henriques:
Jonathan B. Howes, Secretary
The pretreatment staff of the Division of 'Environmental Management has completed a
preliminary' review of the Grinnell Fire Protection Systems pretreatment discharge
application. As a result of this preliminary review, the pretreatment staff suggests that
other discharge alternatives including the Non -Discharge Permit (infiltration gallery) and
General (NPDES) permit be pursued and that the pretreatment permit application he
withdrawn.
Thepreliminary review indicates that this discharge would constitute approximately 7
percent of the Wastewater Treatment Plant's (WWTP) Design How and would qualify as a
Significant industrial User (SILT) Discharge as codified in 15A NCAC .0903 (h) (9) (B). With
this discharge qualifying as a SW, either the Town of Cleveland or the State would have to
administer a full pretreatment permit and program, including Sewer Use Ordinance
Modifications, a WWTP and collection system Long Term Monitoring Ilan, and a WWTP
Headworks Analysis. As you may be aware, the costs of developing and administering a
pretreatment program may be recovered from the SW. As such, the short-term and long-
term costs of establishing and maintaining a pretreatment program For the Town of
Cleveland should be included in the economic analysis of this project. The pretreatment
staff believes that the revised economic analysis will indicate that discharge to the 'fown of
(level -and is not the most cost-effective environmentally acceptable alternative.
.7,, 2768'7, Raleigh, North Carolina 2760.4.1148 'Telephone [phone] Fax ,3 919433-0543
An Equal Opportunity Alfirmaiivc Action Employer

The pret atrnent staff also noted that the Grinnell Fire Protection ystem's Application for
Pretreatment Discharge Permit is incomplete as it did not include the application fee
payment. Please submit either the pretreatment permit application withdrawal request or
application fee payment by February 9, 1993 to Julia Storm f the Division's pretreatment
staff. The permit review will not be completed until the fee payment is received. If you
have any questions, please feel free to contact either Joe Pearce or Julia Storm of the
pretreatment staff at [phone].
1rl r grinnell.0 0
cc: The Honorable Travis i endroi
James ; Diehl, Town cif eveland
Moores 1 ut l ficc.
Central Files
Pretreatment .tment If
l ever Clemen
. s scant Cluefw'
ate C uality Sec
of the Town
ink l ngineer,
land
arming &<Ass( c a