NC0085057_Regional Office Historical File Pre 2018 (2)

t
SOC PRIORITY PROJECT: Yes No
To Permits and Engineering Unit
Water Quality Section
Attention.: Mary L. Cabe
Date: May 3, 1996-
NPDES STAFF* REPORT AND RECOMMENDATION
County: Mecklenburg
Permit No. NCO085774
MRC No. 9-120
PART I - GENERAL INFORMATION
. Facility and Address: Unocal Mallard. Creek Polymer Plant'
23000 Barrington Road, Suite 500
Hoffman Estates, Illinois 6015
2. Date of Investigation. 05-02-96
. Report Prepared By: G. T. Chen
. Persons Contacted and Telephone Number: Mr. Michael D. Carty,
Safety, Health & Environmental Affairs Coordinator, Mallard
Creek Polymers, Inc., [phone] x3006
. Directions to Site. From the intersection of Highway 29 and
Morehead Read (SR 1300) in west Cbarrus County near the
border with Mecklenburg County, travel west on SR 100
approximately 0.45 mile: to enter Mecklenburg County where the
road name changes to Union School (SR 2467). Travel west on
SR 2467 approximately 1.10 miles. Mallard Creek Polymers,
Inc. (formerly Unocal Mallard Creek Polymer Plante is on left
(south) side of the road.
6. Discharge Point(s). List for all discharge points:
Latitude: 350 20' 5511 Longitude: 800 42' 4811
Attach a US.G.. map extract and indicate treatment facility
site and discharge point on map.
USES Quad No. F 16 SW USES Quad Name: Harrisburg, NC
7. Site size and expansion are consistent with application?
Yes.
. Topography (relationship to flood plain included): Sloping
southeast at the rate of 5-10%. The site is not in a flood
plain.

9. Location of nearest dwelling: No'dwellings within 500 feet of
the site.
10. Receiving stream or affected surface waters: UT to Mallard
Creek
a. Classification: C
b. River Basin and Subbasin No:: Yadkin -Pee Dee & 0 -07-1
C. Describe receiving stream features and pertinent
downstream uses: The proposed discharge is to a drainage
area (or headwaters area) of an unnamed tributary to
Mallard Creek.Mallard Creek TP's (NPDES`NC0030210
discharge point is located approximately 1.5 miles
downstream.
PART II - DESCRIPTION QF"DISCHARGE AND TREATMENT WORKS
1. a. Volume; of wastewater to be permitted: 0.090 MGn
(Ultimate Design Capacity)
. What is the current; permitted capacity of the wastewater
treatment facility? NIA. Proposed discharge.
C. Actual treatment capacity' of the current facility
(current design capacity)? NIA. Proposed facility.
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: None.
e. Please provide a description of existing or substantially
constructed wastewater' treatment facilities: NIA.
Proposed facility.
f. Please- provide a description of proposed 'wastewater
treatment facilities: The proposed groundwater
r meth tion facility will consist of four (4) recovery
wells, an equalization tank, dual particulate filters,
dual activated carbon adsorption units, a discharge
holding tank, and associated transfer pumps and controls.
g. Passible toxic impacts to surface waters. Discharges of
this nature have been found to exhibit toxicity.
h. Pretreatment Program (POTWs only: NIA.
2. Residuals handling and utilization/disposal scheme: No solids
disposal scheme is available at this time. The applicant
NPDES Permit staff Report
Version 10/92
Page 2

needs to submit a solids waste management plan to DEM for
approval, if solids generation is expected.
a. If residuals are being land applied, please specify BEM
Permit No. N/A.
Residuals Contractor: /A«
Telephone No.: N/A.
b. Residuals Stabilization.- RP: N/A.
RFRP. N/A.
Other: N/A.
C « LandfillsN/A.
'
d. other disposal/utilization scheme (specify): N/A.
;. Treatment plant classification (attach, completed rating
sheet):Class I, see attached rating sheet.'
4« SIC Code(s)s 2821
Wastewater odes)
Primary. 66 Secondary:
Main Treatment Unit Code.- 00208
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)"?
N/«
2. Special monitoring or limitations (including, toxicity)
requests: A toxic limit and/or monitoring may be necessary
due to the toxic nature of similar discharges.
3. Important SOC, JOC or Compliance Schedule dates. (please
indicate) N/A.
4. Alternative Analysis Evaluation. Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.
Spray Irrigation: Insufficient suitable land area available
for a spray irrigation system.
Connection to Regional Sewer System. Charlotte -Mecklenburg
Utility Department (C D) no long accepts treated groundwater
NPDES Permit Staff Report
Version 1 /'
Page

to its sanitary system.
Subsurface; Insufficient suitable land area available for a
subsurface disposal system.
Other Disposal Options : Unocal is considering the partial re-
use of the treated groundwater, however, a discharge permit is
still needed for discharging excess wastewater.
. Air Quality and/or Groundwater concerns or hazardous materials
utilized at this facility that may impact waiter quality, air
quality or groundwater? The proposed treatment facility is to
remediate groundwater that has been contaminated with
chlorinated organic solvents. Contaminated groundwater will
be recovered and treated via the proposed facility prior to
discharging to the headwaters area of an unnamed tributary to
Mallard Creek, C waters, in the Yadkin -Pee Dee River;basin.
No hazardous materials will be stored and/or used at this
facility. Impacts, if any, on the environment should be
minimal.
. Other Special Items: None.
PART I - EVALUATION AND RECOMMENDATIONS
Unocal Corporation requests an NPDES Discharge Permit for the
operation and discharge of treated groundwater from'a proposed
groundwater remediation facility located at its former Unocal
Mallard Creek Polymer Plant (current occupant: Mallard Creek
Polymers, Inc.) in Charlotte, Mecklenburg County, The groundwater
has been contaminated with chlorinated organic solvents. Recovered
groundwater will be 'treated via the proposed remediation facility
prior to discharging to the headwaters area of an unnamed tributary
to Mallard Creek.
Since similar discharges have been found to be toxic, a
tonicity limit and/or monitoring may be necessary. Pending final
review and approval by the SRG it is recommended that an NPDES
Permit be issued, to the applicant as requested.
NPDES Permit Staff Report
Version 10/9
Page 4

Signature 4t Report Preparer
Water Quality, ega anal Supervisor
4
Date
DENS Permit Staff Report
Version 9
Page

"cl *fit UNITED STA"
DEPARTMENT OF T '
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NPDES Permit #NC0085057 Renewal Form "-G
NCDENR Incident #12329, High Priority
Former Unocal Chemical Dist. Facility #CI-101
611 Orr Road, Charlotte, N.C.
S&ME Project No. 1354-99-16
CorporationUnocal
2300 Barrington Road, o'i i!
• •
Prepared B
S&ME, Inc.
751 Southern Pine Blvd.
Charlotte, NC 28273
August 2000

07/31/00 16:36 IM847 310 6890UNOCAL.- ERT 444 SME CHARLOWEQ00 /003
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&MiVOL B 9�8'6 $° dI6 LM 1J`cM4/M. ° ....... rr wtulWly
«
DE Z TION - SHORT F4 C-GW
To be filed by pers*w is gzc comeftd=
Pro!
N. C. Depu=clmr of EWArQ==tnt wd
Dm9ion of Wus Q ty / D
1617 ' 1" XC 277
PcmitN V C Jf'ee +r 1r
AtMP***r4V8
p I Applicard and facility producing dscharge
A. Nam
S- Malling address of 8PPlicart
street address Z 3 p ✓r'�. ,rc ,rE'o i'1�
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l to %6rrais zipcode - a 3
Telephone Number ( 5r7 } 3to —6 8 e-mail address', ^Ityerl
.s
Fox Number WO — 10
i
C, Locattion of facility. * 4 .%,A //.R q s
City a4r p 'countyState Jovc�
ZIPCode Z S 3
Fax Number
2.Standgrd InduWAal Cla ' i ttan (SIC) s) ("known)!
3. This application is for a New Permit Peffrdt Renewal Permit Modlilcadon
4. Pm (s) alt apply):GasolineDiesel fuel
� � of ,�'
rdescri �e-+R9tt
5. (a) V discharge o=rs all year. or
(by Circle the nth(s) in which clischarge, JanuaryFebruary' March April
y June July August September October
November December
(c) Days per week discharge ccctlrsr k
j Gpt-
6. volume okwastemlear discharged to receiving str m(s): Zoo. VChea hem' A is &SCharged directly to str m($)
a
if riot state the speoffic dsct'Qtgft tion',
Mgjt the pat, Wo by. tertc the madvitV sturfN on (help* Ita 51mm seswirb to only vlaWimem of d=haw,
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« la+�th to �9 Pd►'�,
SboitFbrrftC-G
W V bw 7

LAFAYETTE AREA LAB
SM AMBASSADOR CA FERY P
SCOTT, LOUISIANA,
P 7c .S
PHONE: [phone]
<Ua
L A E 0 R A T 0 R Y R E P A R T
Subutitted to: Reported: 7/ 2 0 0 0
S &ME
751 SOUTHERN PINE BLVD
CHARLOTTE ITC 28273
JUL'RCCII
Prepared For: UNOCAL CORPORATION
measurement Baas: This analysis was performed in accordance with EPA.
guidelines for analysis and quality control. Results on Dry
Weight Basis for sail samples. SPL Certification Number 87
Approved By:
t
ANN
I E REED
Project Manager
Note.- This report may not be reproduced except. in full,
without written permission :From SPRY

_
LAFAYETTE AREA LAS
500 AMBASSADOR CAFFERY PK Y.
SC;TT, LOUISIANA
ZIP 70583* 544
PHONE: [phone]
Date: Thursday, July 20, 2000 *****Si1 ARY ]REPORT*****
Company: UNOCAL CORPORATION Project No.
1 -9 -169
Site: CHARLOTTE, NCProject: #0001014, 6101 ORR ROAD
am OWN
Workorder Matrix Client ID Collected Compound
Result
D t Limit
Method
0007421-01 WATER EFFLUENT 7/11/00 [l,l,l-Trichloroethane
KD' 0.50uglL
Method 60140CFR PART13i
1,i,2,2-Tetrachloroethane
ND
0.50ug/L
Method 60140CFRPARTI3
j 1,1,2-Trichlotoethane
ND
0.50ug/L
Method 60140 CFR. PART 131
I,l-Dichloroethane
ND
0.50ug/L.
Method 60140 CFR PART 13'
1,1-Dichloro thene
ND
0.50ug/L,
Method 601 40CFRPART 13
1,2-Dichlorobenzene
ND
0.50uglL
Method 60140 CFR. PART 13
1,-Dichloroelhane
NL
0.0ug/L
Method 601 4C} CFR PART 1 31
__.. Vtl _..____—_
1,2-Dichloropropaneh
ND
0.50ug/L
Method 60140 CFR PART 13
1,3-Dichlorobenzene
NLT
0.50ugiL
Method 601 40 CFR PART 13,
�.
v
I,4-iichlorobenzene
_�
ND
-
0.0ug/L
—______...�...__e ____
Method 601 40 CFLL PART 13
2-CFR
ether
ND
5.00ug/L. _
Method 60140 CFR PART 131
Bromodiehloromethane
ND
0.50ug/L
Method 60140 CFR PART 13'
l3ro form
ND
0.50ug/L
Method 60140 CFR PART 13 ;
Hromomethane
ND
0.50ug/L
Method 60140 CFR PART 131
Carbon tetrachloride
ND
0.50ug/L
Method 601 40 CFR PART 13
Clatorobenzerie
NL)
0.50ug/L
Method 60140 CFR PAR r 13 i
IChloroethane
NL
0, 0u /L
Method 60140 CFR. PART 13
ND
0.50ugtL
Method 601 40 —CFR PRi` -13-1
�Chloroform
Chlorometharie
Nth
0.50ug2
Method 60140 CFR PART 13
cis-1,3-Dich1oropropene
ND
0.50ug/L
Method 60140 CFR PART 13 i
Dibro ochloronaet one
ND
0.50ug/L
Method 60140 CFR PART 13 E
Dicl7lo dilluoromethane
ND
0.50ug/L
Method 60140 CFR PART 13 {
Methylene chloride
ND
0.50u
Method 60140 CFR PART 13
Tetrachloroethene
Nil
0.50ug/L
Method 60140 CFR PART 13
�'rrans-1,2-Dichloroethene
ND
0.50ug/L
Method 601 40 CFR PART 131
trans-1,3-Dichloropropene
ND
0.50ug/L
Method 60140 CFR. PART 13 !
Trichloroetlsene
ND
0.50ugtL
Method 601 40 CFR PAR'i' l3 i
Trichlorofluoromethane
ND
0.50ug/L
Method 60140 CFR PART 13
Vint chloride
0.50
0.50ug/L
Method 601 40 CFR PART -13-1
Chromium, "total
ND
0.010mg/L
Method 6010B
rNickei, Tata1
1 012 0.010mg/L
Method 6010L3 * ;
D - Not Detected.
Notes:*lief. Methods for chemical Analysis of Water and Wastes, 1983, EPA.
**Ref-. Standard Methods for ;Examination of Water and Wastewater, l8th ed.
***Ref. Test Methods for Evaluating Solid Waste, EPA SW846, 3rd ed.
page I of I

LAFAYETTE AREA LA8
00 AMBASSADOR C FFERY PKWY
SCOTT, LOUISiANA
ZIP 7Q583.8544
PHONE: [phone]
Certificate of Analysis No Ll-0007421-01
UNOCAL CORPORATION
2300 BARRNGTCN ROAD, STE 500 P. p. #
HOFFMAN ESTATES, IL 60195 49728 , AFE #407 00 , COC 1 12 i
ATTN- CHRIS MEYER DATE: 0 "7 / 2 0 / 0 0
PROJECT: ## 0 0 0 01 , 6101 ORR ROAD PROJECT NO: 1 4 - 9 -16
SITE: CHARLOTTE/ C MATRIX: WATER
SAMPLED BY: Si ME DATE LED 07 11/00 13 :45:00
SAMPLE ID EFFLUENT DATE RECEIVED: 0 7 / 1 / 0 0
ANALYTICAL DATA
PARAMETER RESULTS DETECTION UNITS
LIMIT
Chromium, Total ND 0.010 mg/L
Method 6010B **
Analyzed by: NH
Date 07/19/00 1. ;07:41
Nickel, 'dotal 0.012, 0.010 m /L
Method. 60108
Analyzed by NH
Bate 07/19/00 16 07: 1
Digestion for Acid --Extractable Metals 07/13/02
Method. 3030 C **
Analyzed by. COCA
Date: 07/13/00 1 c00: 0
ND - Not detected,
Notes: *Ref: Methods for Chemical Analysis of Water and Wastes-, 1983, EPA
**Ref Standard Methods for Examination of Water & Wastewater, 18th ed.
***Ref Test Methods for Evaluating Solid Waste, EPA SW84, 3rd Ed.
QUALITY ASSURANCE: This analysis was performed in accordance with EPA
guidelines for analysis and quality control. Results on Dry
Weight Basis for soil samples. SPL Certification Number 487

LAPAYME AREA LAB
500 AMBASSADOR CAFFERY PVC
SCOTT, LOUISIANA
ZIP 70583.8644
PHONE! (337) 2 7-4775
Certificate of a.l.ysis
No. Li.-
07 1.- 1
UNOCAL CORPORATION
2300 BARRINGTON ROAD, STE 500
P. O.
HOFFMAN ESTATES, IL 60195
49728,AFE#40730058,COC#1112
2'
A"TN: CHRIS MEYER
07/20/00
PROJECT: T: #0001014,_ 6101 ORR ROAD
PROJECT NC3s
1354--20
SITE. CHARLOTTE, NC"MATRIX:
WATER
SAMPLED BY: S&ME
DATE
SAMPLED:
0 7 / 11 / 0 0 13 4 5 b } 0
SAMPLE D EFFLUENT
DATERECEIVED:
07 12 / 00
ANALYTICAL DATA
PARAMETER
RESULTS
P L*
UNITS
Dich orodi luoro h
0.50
ug/I
Chlorometh .ne
ND
€1.50
ug/L
Vinyl chloride
0.50
0.0
ug/L,
Bromomethane
ND
0.0
ug./L
Chlorcethane
ND
0.50
u.g/L
T ichlworofluoromethane
ND
0.50
Ug/L
1, 1--Ilichloroethen
NIA
0.50
ug/L
Methylene chloride
ND
0.50
g/L,
Trans--1, -Dichl oroethene
ND
0.50
ug/L
1 1-D chloroethane-
NNE
0.50
ug./L
Chloroform
NIA
0.50
ug/L
1,1,1-Trichloroethane
ND
0.50
g/L
Carbon tetrachloride
ND
0.50
u /L
1,2-Dichloroethane
ND
0.50
ug/L
--Chloroethyly nyl ether
NIA
5.00
ug/L
Trichloroethene
ND
0.50
ug/L
1, -D chloropropane
ND
0.50
ug/L
Bromodichloromethane
ND
0.50
ug/L
cis-1,3--D chloropropene
ND
0.50
ug/L
trans-1,3-Dichloropropene
ND
0.50
ug/L
1 1,2-Trichloroethane
ND
0.50
ug/L
Tetrachloroethene
ND
0.50
ug/L
Dibromochloromethane
ND
0.50
ug/L=
Chloroben ene
ND
0.50
ug/L
Bromoform
ND
0.50
g/L
1 1, 2 , 2-Tetrachloroeth ne
Nib
0.50
ug/L
1 3-Dichloroben ene
ND
0.50
g/L,,
1, 4- Di hlorobenen.
Nib
0.50
ug/L,
1,2-D chloroben:en
0.50
ug/L
METHOD: 601, Halogenated Volatile Organics
(continued on next page)

LAFAYETTE AREA LAS
500 AMBASSADOR CAFFERY PK
SC( TT, LOUISlANA
ZW 70583.8544
PHONE. [phone]
< Gy
Certificate of Analysis No. L1-0007421-01
UNOCAL CORPORATION SAMPLE ID: EFFLUENT
SURROGATES <RECOVERY
Bromo hloromethane 96
ANALYZED BY: RB DATE/TIME; 07/12/00 04: 6:00
METHOD: 601, Halogenated Volatile Organics
NOTES. *` - Practical t ua .titation Limit ND - Not Detected
N - Not Analyzed
CO
QUALITY ASSURANCE: This analysis was performed in accordance with EPA.
guidelines for analysis and quality control. Results can Dry'
Weight Bads for sail samples. 8PL Certification Number 487

LAFAYEf i E AREA LAB
500 AMBASSADOR CAFFERY PKWY,
SCOOT, LOUISIANA
21P: 544
** SPL BATCH QUALITY
CONTROL REPORT **
[phone]
Method
601 40 CPR PART 136
Matrix: Water
Batch Id-.
HP00000712090700
Units. ug/L
L A B 0 R A T 0 R Y C ON T R O L SS
A M P L E
S I I X IS
Method
Spike
Blank ike
QC Limits(**)
COMPOUNDS
Blank Result
Added
Result Recovery
(Mandatory)
<2>
<3>
<1>
Recovery Range
Dichlorodlfluoromethane
ND
10,00
7.9
79.0
60 _ 130
Chloromethane
ND
10.00
4.9
49.0
0 193
Vinyl chloride
NO
10,00
8,6
86.0
28 - 163
Bromomethane
NO
10.00
7,9
79..0
0 - 144
Chloroethane
ND
10.00
10
100
46 - 137
Trichlorofluoromethane
NO
10.00
9,6
96,,0
21 - 156
1,1-Dichloroethene
NO
10.00
9,5
9510
28- - 167
Methylene chloride
ND
10,00
11
110
2 - 162
Trans-1,2-Dichloroethe e
ND
10.00
918
98.0
38 - 155
1,1-Dichloroethane
ND
10.00
9,8
980
47 - 132
Chloroform
NO
10,00
9.2
92.0
49' - 133
1,1,1-Trichloroethane
ND
10,00
9.6
96.0
41 - 138
Carbon tetrachloride
ND
10,00
9.4
94..0
43 143
1,2-Dichloroethane
ND
10.00
10
100
51 147
2-Chloroethylvinyl ether
NO
10,00
8.3
83.O
14 - 186
Trichloroethene
NO
10,00
10
100
35 - 146
1,-Dichloropropane
ND
10.00
9.6
96.0
44 - 156
Bromocichloromethane
ND
10.00
10
100
42 172
cis-1,3-Dichloropropene
ND
10.00
10
100
22 178
trans-1,3-Diehloropropene
ND
10.00
11
110
22 - 178
1,1,2-Trichlsroethaae
ND
10.00
10-
100
39 _ 136
Tetrachloroethene
NO
10.00
9.5
95.0
26 - 162
Dibro ochloromethane
NO
10.00
10
100
24 191
Chlorobenaene
ND
10.00
10
100
33 - 150
Bromoform
ND
10.00
10
100
13 - 159
1,1,2,2-Tetrachloroethane
NO
10.00
10
100
8- 184
1,3-D cblorobenzene
NO
10.00
10
100
7 - 187
1,4-D chlorobenzene
NU
10,00
10
100
42 143
1,2-Dichlorobenzene
ND
10.00
10
100
t - 208
M A T R I X S P I X R S
S P I K E
Sample Spike
Matrix
Spike Matrix
Spike
MSfMSD
QC Limits(***)
C 0 M P 0 U N D S
Results Added.
Du licate
Relative
tAdviso
Result
Recovery Result Recovery Difference RPD
<2> <3>
<1>
<4> <1>
<5>
Max.Recovery Range
DICHLORODIPLUOROMET`
ND 10.00
7.2
72.0 6.9
69.-0
4.26
61 -
130
CHLOROMETHANE
ND 10.00
4.4
44,0 4.1
41:0
7.06
37 0 -
193
VINYL CHLORIDE
NO 10,00
7.8
78.0 7,4
74.0
5.26
29 28 -
163
BROMOMETHANE
NO 10.00
7.0
70.0 7.8
78.0
10.8
38 0 -
144
CHLOROETHANE
NDI 10.00
8.8
88.0 9.0
90,0
2.25
32 46 -
137

LAFAYETTE AREA LAS
'
500 AMBASSADOR CABFERY P Y.
SCOT , LOUISIANA
ZIP 70583-SW
** SPL BATCH QUALITY CONTROL REPORT **
PHONE: [phone]
A4 MINOR=
Method 601 40
CFR PART 136
Matrix: Water
Batch Id:
HP00000712090700
units: ug/L
14A T R I X
S P I K E S
S P I K E Sample
Spike
Matrix Spike
Matrix"
Spike
M /MSD
QC Limits(***)
COMPOUNDS Results
Added
Duplicate
Relative 4
Advisc
Result Recovery Result Recovery
Difference
RPD
<2>
<3>
<1> <4>
<1>
<5>
Marc. -
Recovery Range
TRICHLOROFLUOROMET E
NO
10,00
8.8 88,0
8.7
87.0
1.14
30
21 -
156
1,1-DICHLOROETNEXE
ND
10.00
9.1 91.0
9.0
90.0
1:10
33
2-8 -
167
METHYLENE CHLORIDE
NO
10.00
9.7 97.0
10
100
3.05
20,
25 -
162
TRANS-1,2-DICHLOROETHENR
NO
10.00
9.3 93.0
9.4
94 0
1.07
32
38 -
155
I,I-DICHWROETHANE
ND
10.00
9.4 94.0
9,5
95.0
1.06
20
47 -
132
CHLOROFORM
NO
10.00
9.5 95.0
9.5
96.O
1.05
23
49 -
133
1,1,1-TRICHI ROET E
NO
10.00
9.4 94.0
9.3
93.0
1.07
24'
41 _
148
CARBON TETRACHLORIDE
ND
10.00
9.4 94.0
9.3
93.0
1.07
28
43 -
143
1,2-DICHLOROETHANE
NO
10.00
10 100
10
100
0
26
51 -
147
2-CHLOROETHYLVINYL ETHER
ND
10.00
11 110
11
110
0
42
14 -
186
TRICHLOROETHENE
ND
10,00
9.3 93.0
9.3
93.0
0
21
35 -
146
1,2-DICHLOROPROPAXE
ND
10.00
9.5 95.0
9.6
96.0
1.05
26
44 -
156
BROMODICHLOROMETHANE
NO
10.00
10 100
10
100
0
22
42 -
172
CIS-1,3-DICHLOROPROPENE
NO
10.00
10 100
10
100
0
37
22 -
178
T S-1,3-DICHLOROPROPENE
NO
10.00
11 110
11
110
0
37
22 -
178
1,1,2-TRICHLOROETHANE
NO
10.00
10 100
11
110
9 52
22
39 -
136
TETRACHLOROETHENE
NO
10.00
9.2 92.0
9.1
91.0
1 09
27
26 -
162
DIBROMOCHLOROMETHANE
ND
10,00
11 110
11
110
0
32
24 -
191
CHLOROBENZENE
NO
10.00
9.7 97.0
9.8
98,0
1.03
25
38 -
ISO
BROMOFORM
ND
10.00
11 110
11
110
0
24
13 -
159
1,1,2,2-TETRACHLOROETRANE
NO
10.00
11 110
11
110
0
46
8 -
184
1,3-DICHLOROBENZENE
NO
10.00
10 100
10
100
0
46`
7 -
187
1,4-DTCHLOROENZENE
ND
10.00
9.3 93.0
9.5
950
2.13
28
42 -
143
1,2-DICHLOROBENZENE
ND
10,00
10 100
10
100
0
28
0 -
208
Analyst: RB
* Values Outside DO Range'.
« _ Data outside Method Specification
limits.
Sequence Date:: 07/12/00
NC Not Calculated (Sample exceeds
spike by factor of 4 or more)
SPL In of sample spiked= BLANK
ND - Not Detected/Below Detection
Limit
Sample File ID. EG12305.TX0
% Recovery - [( <1> - <2> ) /
<3> l
x 100
Method Blank File ID:
LOS % Recovery -
(<1> / <3>
) x 100
Blank Spike File ID EG12304.TXO
Relative Percent.
Difference =
1(<4> -
<S> j / ((<4> + <5>
) x"0.5)
x 100
Matrix Spike File ID: E 12308.TX0
t**) Source:
601 Table 2
Matrix Spike Duplicate File ID: EG12309,TX0
{***) Source.
601 Table 2
S PLEB xN TC7i SPx xD s
0006972-03A
0006972-06B 0007421-01A

LAFAYET E AREA LAB
500 AMBASSADOR CAFFERY PKWY.
SCOOT, LOWSEANA
ZIP 70583-8544
PHONE [phone]
6010B QUALITY CONTROL REPORT
Batch: 0007191030 _ Units: m !C
Matrix. ar Analyst:
Analyses Date U y � ;
LABORATORY CONTROL SAMPLE
FEE �, 4 : ro Order(s) in Batch:
-> 0007421-018
MATRIX SPIKES
`" w°, NU NU ,'�Uuu: AU-I:U i #.iJu JLIJ.e a.vVtir .1
SaMOS spiked. 0007406.03C NC --Not Calculated ND -Not Detected MOOD719A

.
:PLLI 1SM- -€Ca00,
v
"Sample Receipt cheeldis
,...
H erat»" e y COC Serial /Ia
i Yes
No NA
re Custody seals on the shipping container present and intact
Chain -of -Custody (COC) present and signed by the sampler? --�
r reports, garb lls, or bills of lading resent.
Are plc ntamers intact?
re sample tags/field labels present on each sample?
all s ples present in the sample kit listed on the COC? �--
to datelt~ e of sample collection agree with COC?
)o sample tags/field tags agree with COC?
zjoes sample typoagree
)oes*the number of bottles recieved for each parameter agree withc6b
�.
Does the bottle type and volume agree with COC?
e the al ses requested' listed n the COC?
Is the sample lit temperature 2 -- 6 der C?
(ecord the temperature in degrees C in the NA column.
's'the lI ofal larerved plea c kecl d document€l properly-
e pl pr erved riling to SPA ilel n ?
`e all samples within the SPA uimu holdin t` °7
o s plc tztaineis nto tci P.A. icl.lines*?
?id the re i-vin to i r rd the datett e of r ipt d sigh. tlxe CrC�C'?
�"
was a nanct�z�l` ante filled t Cor a'ny terns vsitlx C) r pc�n5
.
vlethod of sample delivery to SPL, and airbill number where applicable {circle one?
l c# ill's Other: 1`
Method of`sample disp9sal.(circle one} '1'f l ispc�s 1 LLD
lt.eturn to Client
-----------------
-- Dateffirne:
1Zeceivmg "technician signature:.

i
kilg r'o na Packages up m iatl lbs.
r $ 12665597680
alrvaryCamrnnmaMmayaelater uM aeme areas
'Poi
Express Package Seneca FedEx First overnight
_ tluern#ght ] FedEx Standard puarnight � Earnest oextbuslnesa mam�ng
6�}{� FedEx Prigrt►y, Naxtbusmess attemann doMeNta salectlacaaa++s
front T C7 Neztbusuress mnmmo
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►fete °fedExtattar Re. MA
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In 704 52 .E sacandbnsinessilay
Phone - Fackagasavarf5gi►ts.
Sender's 'Y.W. :. '1 urrat Rativarvcommmnemmayhalsterin sane areas.
Name L� 4b ExpressfreirghtSetvicae FedEx3Da Freight
o Fait 2DaYFreight Thee n��r�aa v
(�(+ {gq p ' 0 FedExlDa�Freight" sa¢aMaesnas:ear
W fig$ SLS .L &a b+ 8 i NB%t btiNn83e ai'
0 Coln en )
# 354 iacanrot Carfi>mapan.:—,. *R¢ciaeadvalue Ymn
fine Byrd. oecunedsw_MM,1m 5 Packaging erPkg.
W Address % t3lttit Ctt E] FedEx Pak* nG ones iadE a¢a Teams
soma 28273; ❑ FedEx Letter ruaa,and Gnsromarpka
Stag G zip
c r, a to t t e d e 6 pecial;Nartdfing HOLD Weekday ►►ow saw r�a
Sunday Delivery atFedExLocatlon [ atFb,19,T.�a�pn .
5 ► " 1 Unocal " Q Saturday pehvaly r�'"} Ave ante aEeaExPna e
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YOt#TinteTaaiRitlltrgRe{ereliGe : �1#vaaaaiaimWE1PdadN evamigtdtnsele¢tZiPGadss. iedFxFrstgwmfghC wsei¢etin¢ennns
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1 L3 % „+ 7 '). msaWGt2{P ¢eda4 ned%'i
3 TO Ph_._.--°"Q---- Goeadrisstripme+RcoMaindangkrousg
Recipients Reedy nnnt,a morn Ycs � Dr�ice —kq
t Ciie Y2S D�'''j gNca.9.UNt9ns
Name.. 0 As pax enacned i_.J 5h}ppetsgaclaraban
j - sNFnarsgaetarannn natraaCarw [] Cargo A+raraftOrdY
six py { °• Cy �^^y {may # AB
», acka ,n : r'- obtapx kut u
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Com an Sol`
{�q Cttt�,�99 S3ayn3errt 13it1 enGrrm4rxA".r{ Nn Gr ,ad, Card
�] Cash/Check
y�^q^°�q^�Ry [^ I"W T ("''� eclpient �•►►1ITi�#n2rl}r L_J
"} i' i ,G.TT * RePaJnoJnonrrS L�,1 Acec6 Na Section _
Address C} J €" 13 ASS�rDOR �ua¢awaa
Ws aan+saC daCroarin P.q. aaxas ee PR,ZiG caries t`#ta# Charpes�
area as .
rota►Weigh►
1 TaMTilli atFedrxtaaatim5. t,..d"'f#P 17'i} 55 „' CreddCwa A,wth
`ti pnneKadEx aadtasshara Stare y
u doelara a kugher value. Bee the FadEx 5arnca 6urrteieT details.
t;'rtY r4urliab'd'M isNmhod to $1W untass ya
gy 6 6554 76813 are revs a a
8 ReleaseSigitattare �P�asewaa�rad¢raarvwt
eV sigoingV+zY auNorize usto del+varthts siripmemuwttwut obta�ignature ,
sadagraainmdamn'N end held ushafloOss m"T t,0.463-33391
4� r pdayeMl Call 1^aa0 tedex.co coca s
811
0101 61 7 I t� ottf �c.3r� ar
Rev gala C 4ran et5M191;M�51a`]A 96 FadEx.PRiNiE01N U s k

Oh. PACE ANALYTICAL FAX NO.: 828 254 7176 07-27-00 02: 7P P.02
Pace Analytical Services, Inc.
%
, Sner, la. NC 2 801
a cie 1
Pimp: 628.2547176
fxy: 82 .252.4818
July 2, 2000
Project Management
PAST, Inc.
9800 Kincey Ave., Suite 100
I-Iuntersvill , NC 28078
Project Management
PACE PROJECT NUMBER: 931401
Enclosed are the results of a toxicity test for samples from S&ME received by the laboratory July 12,
2000 through July 15, 2000;
'hest Procedure
EPA; Method Number Final Results
North Carolina Ceriodaphnia Chronic Effluent Toxicity
EPA/600/4-91/002 PASS
Procedure - December 1985, Revised: February 1998
( 'eriodaphnra Pass/Fail Toxicity Test)
A- Amn: v^a�evt<t �^sa1
AT -I to the following address no later than the last day of the month following the month in which the
analysis occurred;
Environmental Sciences Branch
Division of Water Quality
N.C. DENR
1621 Mail Service Center
Raleigh, North Carolina 27699 1621
If you have any questions concerning these results, pleasc"feel free to contact me.
incerely,:_...
Jentaif one
Aquatic Toxicology Laboratory Supervisor

# i4
n:#
a > a
�,.. OEM
a i � i F 4* ': / •. i -.. Syr / � .... k 1# * • , a. ! *.
".. m- a ;4 ii! i. •..
Grab ,sample
i #
i
MAR
...
WIN
FOR

LAFAYETTE AREA LAS
500 AMBASSADOR CAFFERY P
SCOOT, LOUISIANA
ZIP 70583-864
PHONE: [phone]
LAB ORATORIY-,-,,----RE PORT
SPL, WORKORDERNUMBER: 0007029
Subinitted to: Reported: 07/100
STEWART HINES
S&E
9751 SOUTHERN PINE BLVD`
CHARLOTTE NC 28273
Prepared For: UNOCAL CORPORATION
TIO
Measurement Basis: This analysis was perflormed in accordance ce with EPA
guidelines for analysis and quality control. Results can Dry
WeightBasis for sail samples. SPL Certification Number 487
Approved By:
WIE REEDY
Project Manager
Note: This report may not be reproduced, except in full,
without written permission from SPL.

LAFAYETTE AREA LAB
Ir 500 AMBASSADOR CAFFERY PKWY.
PA146ir SCOTT, LtOUISIANA
ZIP 7058"544
PHONE: [phone]
o *""SUMMARY PORT**'***
,ORPORATION Project No: 1 54-99-1
TE NC Project: #0001014, 6101 ORR ROAD
0007029-01 "WATER. SYSTEM EFFLUENT 6/3012000
N - Not Detected.
Notes - *Ref
Methods for chemical Analysis of Water and Wastes,1983, EPA:
**Ref-
Standard Methods for Examination of Water and Wastewater, l8th ed.
***Ref:
"Pest Methods for Evaluating Solid. Waste, EPA SW846,3rd ed.
Page 1 of J
r _

LAFAYETTE AREA LAB
SW AMBASSADOR CAFFERY PKWY.
SCOTT, LOU SIANA
ZIP 70 •8544
PHONE: [phone]'
Certificate of Analysis
No. L1-0007029-01
UNOCAL CORPORATION
2300 BARRINGTON ROAD, STE 500
P.C.#
HOFFMAN ESTATES, IL 60195
49728,AFE#40730068,COC#111263
ATTN: CHRIS MEYER
DATE: 07/10/00
PROJECT: ##0001014, 6101 tORR ROAD
PROJECT NO: 1 54-99-169
SITE: CHARLOTTE, NC
MATRIX: WATER
SAMPLED BY: S ME,INC.
LATE SAMPLED: 0 /30/00 12:45:00
SAMPLE ID: SYSTEM EFFLUENT
DATE RECEIVED: 07/03/00
ANALYTICAL ; DATA
PARAMETER
RESULTSDETECTION UNITS
LIMIT
Chromium„ Total
ND 0.010 m /L
Method 6010B ***
Analyzed by: NH
Date: 07 07/00 12:47:40
Nickel, Total
0.01 0.010 mg/L,
Method 6010B ***
Analyzed by: NH
Date. 07/07/00 12.47:40
Digestion for Acid -Extractable Metals
07/03/05
Method 3030 C **
Analyzed by: CJ
Date. 07/03/00 11:1500
ND - Not detected.
Notes: *Ref. Methods for Chemical Analysis of Water and Wastes, 1983, EPA
**Ref: Standard Methods for Examination of Water & Wastewater, 18th ed.
***Ref. Test Methods for Evaluating Solid Waste, EPA SW846, 3rd Ed.
QUALITY ASSURANCE: This analysis was performed in accordance with EPA
guidelines for analysis and quality control. Results on Dry
Weight Basis for soil samples. SL Certification Number 487

LAFAYETTE AREA LAB
500 AMBASSADOR CAFFERY PKWY,
SCOTT, LOUISIANA
ZIP 70583-8544
PHONE: [phone]
'Maze
6010E QUALITY CONTROL REPORT
0007061500 Units: m L
MrAnalyst:
LABORATORY CONTROL SAMPLE
r a claBirtii .. Fkii u s Work Order(s) in Batch:
0007029-OIA
MATRIX SPIKES _.. _...
Sentple spiked; 0007029.OIA NC -Not C ated ND --Not Detected M000707
(*)Sample concentrations are less than 50 times the Detection Limit: RPD criteria does not apply.
Form: 200.7

SPL/LFJSM-t t.00c
rd3
Pt40NF- (318) =7-47n .
Sample t CheeldiSt
COC Seri al#.
Project L oc: Yes o NA
01111
i
f t i or bills of ladingpresent?
" f
1
on ssample?
t
. f if t • .. i e �
f#• i s #.
R f aCe filled out t R:
method of sample delivery. to SPL and airbill number where applicable (circle one)?
ed- . UPS Other t
.tlrod of sample dispgsal:(circle one) .. PL E ispos HOLD Retum, to Client
r,ei in T&(,-I nician signature: D tef l'inre:
w

r
><€
���.
$�
,.,
� ' "
� �
n �
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� � m
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'4 � '0
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``"r"r��t�c pa��11`,.t'.�"
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$
J{.` C�,.�',�`` c '��;a;�t t �':;g�•t+'�^
A
�6 as y �r P4
f V �� ..p f�'y�.
r w
♦. I a � A
x e! �. � X1 1 �, o :.
4;9b ;OB i S `
*{ g �
a •'
i

f f« •a,
M
i q11 r
- Wf Wi <# . F a
!W a` <if*fib".
amr W
'
�
1
f•« f W�
�
I � �•
W f d «I' rAft�"�A\i��
• W..s t
�y�yy
ggm�
lima
- Not Detected.
*Ref. Methods for chemical Analysis of Water and Wastesi 19831 EPA.
*R; Stand" Methods for Examination of Water and Wastewater, 18th ed.
Page 10 of 16

V/P1
0
0

Date/Time F�atrix
I I
F750
comments
8atived Desc.
1*�
------ ............
,on•I
9. lTimc
Received By.,
i e*

Pace Anelyflee
.54
ceAnalyfical' AS)
Phdj',
UATE;. 04/12/00 UFa :: WLV-1 ATV IV
PAGE: 1
ic. Charlotte Pace Project Number. 9312202
incey Ave. Client Project ID: S&ME 9213184
L00
wille, NC 28078
>ro0ect Management
[phone]
results are reported on a writ weight basis
ample No: 93527083 Date Collected: 04/03/00 Matrix;, Water
Sample ID- S&ME EFF. COMPOSITE Date Received: 04/06/00
tern Results Units PRE Analyzed Analyst GAS# Footnotes
ay
Ebia Pass/Fail Chronic NC Method: EPA 600/4-91/002 Prep Method. EPA 600/4- 1/002
dubia Pass/Fail Chronic PASS No units 0 04/0500 MPR
term rtifutimn ma REPORT OF LABORATORY ANALYSIS i . l
Wastewater 40 This report shall not be reproduced, except in full, A Drinking Water 02980
Drinking Water 37712 without the written consent of Pace Analytical Services, Inc. SC Environmental 99030

+ Pace Analytical Services, Inc.
aceAn/ lr J 54 Ravenscrr�tt Drive
aAsheville, NC 28801
Phone: 828,25A T176
DATE: 04/12/OO Fax 828+2524618
PAGE; 3
Pace Project Number: 9312202
Client Project ID: SAME 921384
{ETER FOOTNOTES
Not Detected
Not Calculable
Pace Reporting Limit
akQ3r or L rtlfication IDs REPORT OF LABORATORY ANALYSISifi 1
NC Wastewater 49 TN Drinking Water 029 0
NC Drinking Water 3771 This report shall not be reproduced, except in full, 5C Environmental 990O
without the written consent of Pace Analytical Services, Inc.

00
mom
mm
Spec
Cond. (umhos)
Chlorine (mg1l)
Sa It
95% Confidence Moving Avg.
Concentration
Mortality

v
PACE ANALYTICAL I
U RAI
AM
I
R�1i!&°aat.rla
Tiat
'S cl+aa
Acute, r uppwoptioU tost doratorv, 24 49 'ate
C 7-dwye
houm
Cotbdophols dutt)e {Wales fibal
ftnspWos (Fathead mInrew4
. ®
prorrAdos
Iftes 1 Fall, dE [} 1 *
Oaphtsl# p4AVX
Full R De t. lire, d td
CypdnodoA v#4o tsf { minnoWl0ow..
t
entda bo a (INand W ta)
Mys)d aptl battfo (Mysid ehsl )
j.'...
PL,E TYPE
CO potato som /r
Sample Informatlon
5 dale; tt t7'
taA t : Sa A
Sa' e F laAar ch . et M , at ,•
rid e;tf
End flow: S
E it RT tr%'b
te✓
Se
A trx"t aItvotuaw 1141! 4edfortc�ti / Jt ca<
^ 8 �
Chtllcd dual ; i
l4umbet of alms fil tot teffif
w
ti // 4t t
htty m
Taut ual net l;
�o sit
a tute at tt of G .' c
A
Sample
114OW of transpori to PAC E. S try `:. rj c 6 h rtljae-El-
+$ -
Nolte; Rtase c*t,tela.iw with the aataptt botot. Ailing. P*ck$&fnPl4lA$O*G4kA-
sampolot mutt be tata6xod at PACE at er WowA`C. txampt• r Id not tratMt
y
REMARKS
rM,PLF- Cuslrony
'.�RJ►f 11 A
F 1 FCIEr USE CONRY ar:
SAMPLE is
JPAOJECT
ACOOE:
c
oAlt r+o
t
RaiingttJsh h :
Recoked by.
c
j S e
T/
OAlt UKUft
1 Ai
p�rti i
A'er!inquMbetal to PACE by:RecaMsd
art PACE by.
ito: 0'
5
t Al
gilt ANO T
"ANY Y
aalt AAO VOA
a
Su mplo tOmporottift upon !pt at PACE (' C):
i

DEHNR MOORESVILLE R 0 Jul 28 100 9:43 P. 01
410 NORTH CAROLINA DEPARTMENT 01r,
ENVIRONMENT AND NATURAL, ftescuitcas'%,
MOORESVILLIM REGIONAL Orivict
DIVISION OF WATER QUALITY
July 28, 2000
�*OLL 14CLUAN
Stewart Hines
S&ME, Inc.
RE: Site Status
6101 Orr Road
Rohm and Haas (Former Unocal)
Groundwater Incident # 12329
Priority Ranking: 2 1 OB
04.
Mecklenburg County, N.C.
0
5;
Dear Stewart.
At your reques� I am writing to confirm that the abovc-referenced site is currently under
A.. —A—
Since contaminants in excess of the North Carolina Groundwater Standards remain in
A groundwater at the site, remediation must continue.
S.
if you have questions, please call me at [phone], ext. 241.
4;! A
0" Sincerely,
v"t
4,
Matt Heller, P.G.
Hydrogeologist
"4,-1. ILI
V
0,101t1r," MAIN symeat. M00410VII.Lit. N**'V* C^I%*LlNA 20114
FAX704�463-80AO
AN IMOUAI- OP004TUNITY I AMFIMATIVS ACVION ZMPLOYRO . 00% nzeyej.XWI0% 00IFT-CONSUORm pApz*

x
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
MOORESVILLE REGIONAL OFFICE
$w DIVISION OF WATER QUALITY
March 9, 199
JAME3 B. HUNT .JR Unocal Corporation
.:. GOVERNOR
C iversified Businesses
2300 Barringer Road, Suite 500
Hoffman Estates, Illinois 60195
Attention: Mr. Christopher Meyer
wE MCDEvt
tlECRETARY x,gT
RE: Acknowledgment of Receipt
g -Quarterly
Groundwater Sampling and Remediation
Status Report #5 and Response
Rohm and Naas (Former Unocal) Facility
Site Priority Rank: 210/B
r
Groundwater Incident No:: 1232
3
- = Mecklenburg County, N.C.
.w.
y Dear Mr. Meyer.
z,
On March 3 1998 the Groundwater Section of the Division of Water Quality
,(Division), Mooresville Regional Office, received the subject monitoring report. The report
has been reviewed and will be placed on file in the Groundwater Section's incident
management files. The Division agrees with the proposed changes in the operation of the
,remediation system at this time. The changes to the system include weekly cycling of the
soil vapor extraction system, discontinuance of the air sparge system and continued
toperati n of the groundwater recovery system.
x
Should you have any questions concerning this site, please contact me by phone at
[phone], extension 261 or e-mail at: <Iandon davidson y � gmro.enr.stte.nc.us>.
Sincerely,
G. Landon Davidson, P.G.
Nydrogeologist
Stewart Hines - S&ME, Inc.
Skarbeck - Rohm and Haas
h-\projdoc\rohm\mnnre 5. 1d
919 NORTH MAIN STREET, MOORESVILLE, NORTH CAROLINA gel 15
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER - 509c RECYCLED" O% POST' -CONSUMER PAPER

H t oa p t h� and Nahj i, . k R Le"V o d l 1 Y ..rk
Division of 'E-nvironnienta�
a
p {^ "�`' Hunt,
, i b Y "at p a. •y y s. ..„iq.1 " 11 .'«1 R Vt(
Jaiale, , � 'Y � u 0. � �, 4 y , ..�. �1•'� t f X h, �Yv`Ya 3�3 2,+MkM1�'u M1 `��1��#
Jonathan B, i j esSecretary
A. Preston
eton Howard, , ,E,
r:.-c
aL C 'r
%p zll i�� `, tt r� t ap s
MISNUN s r . RENT
,p.
�ai�,,.f86.YiIL. R1C3a,.'d,od, of
flo f+,,nan Esta,.ta <,, Illinois (6049
Suba,t:t: i%,i C is apt oil {,, i -1 D li. S Pe'ia:'k
� 1p ai;r lea t 0085774
m q i�.�aai, ap aa. ar�.�.„,tk i.�..�u *..�•Ia„�"s. a:�„xx �y sz�a..v. a .tma+sk
t�f.1 LT %i X-1 P r i`rfnt"m
T� q r NAr k,Ie art t
✓"
The Division c.cknoM'v'lCMdg.r re.c.t' p o hJf r aRIDES p."'Aii l.-p lication, Short n''orill fw .GW,
attachments, a,a d.(`€"prt'ecti 1e ad`:dor� plan, eft Lit =�€ ' t':$ k.n a .he. k #1 �"i'� , iC°i";`r:�i��.� E'C.t i° 4'i` l on
ffl 16, 1996�
Please r 1) -o .)ostz i iax , ,a l Yf. I'OV !lit': carbon
specific c carbon rr(x.tu',,t to be use for ,.ui ,i'vi(. , - wo esiiinates werc ; ub,,,nitf
carbon usage, 9,and 104 .b ,,,xrbt?*a /diC '1'. Pte,t s0.<<,,nli d-k( tn,,- i . inp in1, 1111,,,`101 LISU'd t
calculate, gesso figures,
Be aware that the Divisionregional office, cop -led beltow, aaa,.ast provide, recommendations
».legio aal rvis r for this project ors to f`ifinala,� uon by Hie i�iV S C', , r'WU refill t
ra�
any conimerrt.s', recommendations, cl, is strops, or other :nfonn adore necessary for tl e,
i review.
he proposed system is approved, ar draft permit will be sent to you, At that t fine, please
.rrtlrorzartisri to C<rzrsaitaat rprcLaest, an ATC fee of $150, atratl 1`if,atl ia?trrs aarxaa
:errs sealed by ar NCPE.
in by copy of this letter, requesting that our regional office prepare'aa staff report
recommendations ns r arr in is dischaar e, This a pplic ati irx has beenassigned to ��
If you have any questions, I can e, contacted at 919)733-50 ', extension 518.
Sincerely,

Unocal Corporation
2300 Barrington Road, Suite 500
Hoffman Estates. tllinois 60195
Telephone [phone]
Facsimile [phone]
UNOCALO .n
# 3kaai 4r g �. n Q
BSc fA�y$i
April 12, 1996
hritpnra.Meyer r. Dave Goodrich, Supervisor NPDES
Stuff Engineer
Corporate Environmental N.C. Department of Environment, Health
iemediatien & Technology
and Natural Resources
Division of Environmental Management
Water Quality
512 N. Salisbury St.
Raleigh, N.C. 27604
RE: NPDES Permit Application
Former Unocal Mallard Creep Polymer Plant
Charlotte, North Carolina
Dear Mr. Goodrich;
Cr�
ective Action activitie<
ullins of your
fitted once discharge
anclosed for
facility. Due to its volume, the health risk assessment appendix was not included, but it is
on file with the DEM in Mooresville.
Please call me at [phone] if you have any questions or comments regarding the
permit application.
Sincerely,
Christopher A. Meyer
Sr. Engineer
cc: K. Connell (DEM) (w/o attachments)
R.E. Oehlerts (Unocal)
E. Skarbek (Rohm & Haas)
M. Carty (Mallard Creek Polymers)
T. Kuebrich (LF)

$ Y Li f L i.# 4✓ a .: 6 i 5 <:as 4i *.. .+ b.. f s.. i s a r ♦ -.v e a e e e w... r +. a ,, u w+ r y. .— . - —. - — .. ._ — _ _. e
Division of Environmental Management, P.O. Box 2 535,,Raleigh, NC 27626-0535
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM APPLICA710NNUMBEPe
PPLICATION FOR PERMIT DISCHARGE SHORT FORM C-GW
Cate Deceived
To be filed by persons engaged in groundwater
emediation projects. Yt'" "°)`" Day
(DEM USE ONLY)
Do not attempt to complete this form before reading accompanying instructions.
(Please print or type)
1. Name, address, location, and telephone number of facility producing discharge
A. blame Forger Unocal Mallard Creek Pol er Pi ant Current d Creek Polymers, Inc.
B. Mailing address Unocal Contact Address
1. Street address 2300 Barrington Road Suite'500
2. City f E 3. State IL
4, ZIP 60195
C. Location.
1. Street< 14800 Mallard Creek Road
2. City Charlotte 3.5tat NC
. County Meckl enberq
D. Telephone No. (547-0622
E. Nature of businessl'ol er anufactu in
>y Facility contactal
A. Name Chris Meyer
B. Title Senior ;Engineer C. Telephone No. OB } - 310-6809
Z. The application is for [$ a new permit, ®permit renewal, dpermit modification.
it 2 � of known). if application is for renewal or modification, please indicate permit
SIC= -
number. h C00 '
4. Product(s) recovered Chlorinated and non -chlorinated solvents
[Diesel fuel, leaded or unleaded fuel, solvents, etc]
This application must also include the following: SEE ATTACHMENTS
A) A report of alternatives to surface water discharge as outlined by N.C. Permit and Engineering Unit'
`Guidance for Evaluation of Wastewater Disposal Alternatives.' (Required by 15A NCAC 2H .0105 ).
6) An engineering proposal detailing the remediation project. [Required by 1 A NCAC 2H .4105 (0).
C) A listing of any; chemicals found in detectable amounts with the maximum observed concentration
reported. The summary of analytical results containing this maximum value should also be
submitted (i.e. the listing, not the graphical scan). The most recent sample must be no older than
one year previous to the date of this application.
For fuel remedation projects, volatile organic compounds should be scanned along with any
suspected fuel additives. The following compounds should be included: benzene*, toluene*,
ethylbenzene , xyl ne*, lead , methyl tert-butylether tMTBE), dibromoethane (ED5),
1-dichloroethane, isopropyl ether, naphthalene, phenol.
An EPA approved method capable of detection levels to 1 ppb should be used to detect these
compounds

dent if ied products, an EPA Method 624/625 analysis should be provided,
peaks, not Identified as One Of the targeted compounds and not present in
51GNA
ine 1990).
es are suspected to be present, these should be analyzed to the same detec
i the NC APAM.
'y of each compound detected for the proposed project should be provlde�
water Unnamed tributary to Mallard Creek
)graphical map with all discharge points clearly marked.
.ne QUFaLion ana i Fequency oi tne uj!�t�ndf-yt k(XHLJ11UVU!:,, 11ILVI 1HILMIL, Z�=W[1411
the months of discharge, number of days per week of discharge, volume treated
average f low In gallons per day).
inimm, riizrh;wna of an ayg�r_�gQ 86.dQQ gallops per ri;lv nf treated r nd
_q gU
r; 365 days a �ear.
at I am familiar with the Information contained in the application and that to the best
�ledge and belief such information Is true, complete, and accurate.
stooher A. Meyer Senior Enaineer
�m e Pe s signing Title
17'
tf I
of Applicant Date Application Signed
Ment not to exceed Six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a f
more than S10,000 or Imprisonment not more than 5 years, or both, for a similar offense.)

ATTACHMEN
WASTEWATER DISCHARGE ALTEI
Former Unocal Mallard Cr
Ground Water Correct
NPDES Permit Apl
4
ATIVES EVALUATION
Polymer Plant
e Action
,ation
IL 1b GNL1111dU;U Ulm dPP11jA11[idtGl"Y ju
I be recovered as part of the CAP
aebruary 14, 1996.
DISCHARGE ALTERNATIVE EVALUATION
Four alternatives for the discharge of the recovered ground water were evaluated. These
are:
• Discharge of the ground water to the CMD system,
• Land application of the ground water in the buffer zone areas of the plant;
• Reuse of the ground water for facility manufacturing and maintenance needs; and.
• Discharge of the ground water to surface drainages.
The following briefly summarizes the evaluations that were conducted for the first three
discharge alternatives.

CMUD Discharize Alternative
Unocal will maintain periodic contact with CMUD to
Land Aimlication/Infiltration Gallery Dischame Alteri
- ­ - - - - ----I - __*1 _'__ - - I- - 1- __ t---- :A
stem is considered to be a feasible
The operating facility currently
IUD has been receptive to receiving
.)ast. Due to current staffing
i with Dawn Padgett - 3/27/96).
onitor the status of this program.
tive
mately 150 acres, of which
he topography of the area is
between 600 and 750 feet above
located on a topographic high
Drainage to the north of the plant
re to the south of the plant will flow
Rocky River. Annual precipitation
ated mean annual evapotranspiration
was obtained from a 1986 Site
iration data for North Carolina was
1991)�
[ed at the site, based on the
on Service, June 1980). These are
he Cecil Sandy Clay Loam. The
broad, smooth ridges with shallow slopes. The other two soil types have moderately slow
permeability and are predominantly located on narrower, steeper ridges and side slopes.
While these soils are not generally well suited for leach field designs where additional
wastewater treatment within the soil horizon is necessary, they may be suitable for
infiltration galleries of treated wastewater where no additional treatment is required.
It is estimated that there are approximately 3 acres of open land (in two separate parcels of
1. 1 acres and 1.9 acres) adjacent to the plant where soil types and slopes may be suitable
for land application of the treated wastewater. The larger of these parcels is located directly
above the ground -water recovery area, making it unsuitable from this standpoint. This
leaves approximately I � I acres of available land for application of approximately 86,400
gallons per day (11,500 cubic feet per day) of treated wastewater.

Since no additional treatment of the wastewater is
traditional methods of calculating soil loading caps
applicable. However, approximately 2.76 inches <
the 1.1 acres on a daily basis to disposeof the wat+
water mounding, and virtually constant saturated s
Is- IJIEW-Iuwwvkj ivA` i[illeiillL+!
wded within the soil column, the
y to prevent overloading are not
water would need to be applied over
This would result in local ground..
conditions. Runoff would be difficult
sed on the available suitable area, land'
feasible.
-ease at the plant of some or all of the
. The plant utilizes between 70,000
ing and cleaning operations. City
s. "There is a potential for the plant to
r for manufacturing and/or cleaning
treatment and softening prior to its
)n a continuous basis, therefore
d still be needed.
atential reuse of the treated
ground water to further evaluate the technical and economic feasibility of this alternative. A
permit for discharge; of the treated ground water to a surface drainage will be necessary
even if some of the water is reused.

ATTACHMENT B
ENGINEERING REPORT
Former Unocal Mallard Creek Polymer Plant
Ground Water Corrective Action
NPDES Permit Application
As part of an approved Corrective Action Plan (CA
part per billion level concentrations of several volati
pumped from four ground -water recovery wells as s'.
be pumped from the shallow unconsolidated saprolit
bearing unit. The types and concentrations of VOC�
ground water are discussed in Attachment C to this I
sections summarize the pertinent engineering related
attached to this permit application.
- --- ____r -_ - --- ____ - - -- - -- - I I - -
Appendix D.
I
,4FLOW) was used to evaluate the
recovery well and the total
ikely fracture controlled, previous
t ground -water flow can be
ting homogeneous conditions, Data
ig tests and packer tests that have
-1 deeper monitoring wells.
re provided in the attached CAP -
for each well. The modeling simulations indicated that three recovery wells (RW-1, RW-2
and RW-3) would be sufficient to capture ground water with VOC concentrations above the
NCAC 2L standards, based on the estimated extent of VOCs in ground water (CAP -
Figure 6). In order to provide additional assurance of hydraulic control and recovery of
VOC affected ground water that could impact residential supply wells, Unocal plans to
utilize four recovery wells. The physical condition and the location of former supply wells
U-4 and U-5 are sufficient to allow their use as recovery wells RW-3 and RW-4,
respectively. New wells will be drilled in the former Sludge Drying Area (RW- 1) and near
monitoring well MW-2 (RW-2). The approximate locations of the four recovery wells are
shown in Figure 2. Recovery wells RW-1, RW-2 and RW-3 are located in the areas that
have the highest VOC concentrations. Recovery well RW-4 will provide a larger capture
zone for ground water containing low concentrations of VOCs (below NCAC 2L standards)
to prevent the migration of affected ground water toward nearby domestic supply wells.

Ba
and RW-4,
; estimated that approximately 50 to 60 gallons per
)ed from the ground -water recovery system. Initial
ZO gpm at RW-1, and 10 gpm each from RW-2, RW-3
well will be extracted using a nominal 4-inch diameter,
ach pump will be equipped with motor controllers.
to each pump by the most direct route. The pumps will
it system is not operating.
ng (Figures 2, 3 and 4) will be installed below grade in areas that are
cy -;mei xxthpri- re-inti rrn-.Qincrq nn- npPripti Tht-, ninincr will he. nhnve
as. A red warning tape will be installed above the top of all under
; will be provided in the chase line every 200 feet for the under
very system piping will consist of 2-ineb diameter High Density
)ing, enclosed in a 4 to 6-inch diameter PVC chase line. The chase
xy containment and additional protection for the recovered water
e will be established to provide drainage of any leakage back to a
it system building. The seals on the terminal ends of the chase line
Ives to drain and sample any accumulated fluids. The 2-inch
ufficient to accommodate the anticipated flow rates without
;es.
�complished using horizontal boring techniques, at depths that will
ig integrity. If warranted, some road crossings may be excavated.
)r concrete casing will be used to protect the recovery system
piping.
Where it is above ground, the chase line will be coated to minimize UV degradation of the
piping. Well head manifolding and controls will be located below grade in secured vaults.

Remediation Alternatives Evaluation
This technology is capable of remediating some VOCs at the Site; however, enhancing
biodegradation will not effectively remediate chlorinated VOCs, and the highest VOC
concentrations at this Site occur in unconsolidated materials and in underlying bedrock, The
unconsolidated materials are laterally and vertically heterogeneous, which would make it
difficult to effectively distribute and control injected air. These factors make the feasibility
_'F +4';� +-1-1—, �+ 0'. Qit� ­;4�­" nf tl� ;n4��fAt4 �;-r A"d
recovery of contaminated vapors would be difficult and expensive to achieve.
In -Situ Biodegradation/Bioventing
r"... 4 w9aftim-.1911IM".111I V WIM 6141ALT1919
Because most of the VOCs in the site ground water are chlorinated compounds, which are
not readily degraded aerobically, the usefulness of this technology at the Site is limited.
Although technologies are being developed and field-tested that will more rapidly degrade
chlorinated compounds in aerobic and anaerobic environments, or that will degrade these
compounds using specialty enzymes, these technologies have not yet been proven at sites
with similar subsurface conditions.

Ground -Water Recovery and Treatment
­1 ­� l I a
concentrations, the initial carbon usage is estimated to be approximately 94 pounds of
carbon per day. Carbon usage rates are anticipated to decline as the VOC concentrations in
the recovered ground water decrease.
Since there are not any non -aqueous phase liquids (NAPLs) in the subsurface, an oil/water
separator is not necessary. The treatment system will be equipped with high level alarms
and shutoffs to prevent accidental releases of contaminated water in the event of an
equipment malfunction. Mallard Creek Polymers, Inc. facility personnel will be instructed
to notify Unocal (or its designee) in the event of a system shutdown. Water from the
treatment system will be discharged through a 4 inch PVC line to the NPDES outfall
(Figure 4).

Mu
Th(
,n
ed ground -water recovery and
UV,LWV%,Ii PI—�,VVIV allu 'P�jV'V%jV. vJ11"I"I 'a " '"15%, �w'F'"Ll" "'-' —4--
financial and personnel resources to install and operate this system in compliance with all
applicable federal, state and local regulations. Financial information regarding Unocal
Corporation can be provided on request.

ATTACIIMENT C
ANALYTICAL DATA
Former Unocal Mallard Creek Polymer Plant
Ground Water Corrective Action
DESPermit Application
Table I' provides a summary of the concentrations of volatile organic compounds (VOCs),
semi --volatile organic compounds `(SVOCs), metals and inorganic constituents that have been
detected in ground water at the site. The most recent analytical results are from samples
collected in November 1995.
Wells -2, M-213, -6, M-36, U-4 (Figure 1) and time Church Well are
representative of the ground -water quality in the area of the proposed ground -water
recovery system. The analytical data from these wells were used to estimate the influent
concentrations of the most significant VOCs, as shown below. The analytical data from
wells W-6 and M-6 are representative of the ground -water quality in the area of
proposed recovery well RW-I . The analytical data from wells -2A and W-213 are
representative of the ground -water quality in the area of proposed recovery well RW-2.
The analytical data from wells U-4 and the Church Well are representative of ground -water
duality in the area of proposed recovery wells RW-3 and R-4, respectively. As seen in
Table 1, several VOCs and inorganic constituents are present in ground -water at
concentrations above the NCAC Title 15A 2L standards for ground water.
the following constituents were selected as the most significant indicator parameters:
Constituent Maximum Concentration (upA) Influent Concentration (ug11
Trichloroethene
3600
87
Perchloroethene
1500
93
1,1-Dmchloroethene
750
66
1,1-Dmchloroethane
2200
50
1,2-Dmchloroethane
1.1
0.4
1,1,1-Trmchloroethane
1600
371
Vinyl Chloride
56.7
9
Methylene Chloride
2000
5
Benzene
46
12
Toluene
58.8
Ethylbenzene
112
ylenes (Total)
66.
Total TEX
48
1,2-Dmchloroethene
510
3
Chloroform
3.12
1

Previous analyses (1992 through 1994) of grow
.Compounds (TICs) using EPA Methods 624 an,
volatile compounds. The most recent TIC anal,
generally have the highest concentrations in the
The concentrations in the treatment system infit
entified
maximum observed concentrations.
Constituent
Maximum Concentration (ua/D
Acetaldehyde, methoxy
18
Cyclohexene, 4-ethenyl
10
Benzene, methyl (various)
770
1,3,5,7-Cyclooctatetraene
4000
1,2-Ethanediol, 1,2-diphenyl
6
Cyclohexyl-undecane isomer
2
Dodecanoic Acid
79
Ethanol-2,2' oxybis
120
Ethanone, I -Phenyl
230
Propanoic Acid
7

TABLE I
tier U allar Pulp rt
Ground Water Summary of Detected Compounds
Page I of 9
Mw-I
01/23/92
-
-
MW-1
10/15/92
ND
ND,
01/21/93
-
01/19/95
3.15
ND
-
01/23192
--
-
-
10/16/92
-ND
6
M
=01/2-20/93
01/19/95
;2.3
&24
M
11/15195
----NU
ND
01/23/92
10/16/92
-ND
ND
IRD-
MW-2A
01/21/93
'MW-A
01/19/95
--T51
7.75
-ND
-MW--2A
11/15/95
-4.9
ND
WW-28
lOY21/92
-ND
ND
GC METHODS (ug/1)
Vinyl Chloride
Chloroethane
methylene chloride
3
-ND
ND
'KD-
-ND
-ND
-ND
ND
ND
K5
IJ-Dichloroethene,
9
26
65A
12
22
19.2
ND
17
14
181
ND
120
1,1-Dichlorrethane-
to
111
30.21
56
1801
-,6T-
77
1401
120
--1
.58.1
731
210
Chloroform
ND
ND
NDI
it
ND
NDI
ND,
8
ND
--I
ND
NDI
N
1,2-Dichloroethane
ND
2
ND
ND
ND
ND
ND
3
ND
ND
NDI
NF)
1,2-Dichloroethene
ND
ND
ND
ND
ND
ND
ND
ND
ND
-13
1.38
0.81
ND
1,1,1-Trichloroethane
2.5
60
49.2
12
31
4
12
F4
IND
1.12
1.5
72
Trichloroethene
ND
ND
ND
4
ND
ND
5.8
6
2.55
2.2
451
Tetrachloroethene
ND
4
117
6
5
3.09
18
4
ND
ND
0.48
72
Benzene
2
51
3.66
ND
4
1.66
3
31
7
1 A7
5
8
Ethylbenzene
--
ND
ND
NDJ
ND
ND
-
21
--1
ND
ND
ND
Toluene
I
NDI
NDI
NDI
ND
--
N
ND
3
Xylenes (total)
SID
:::::::::::2
NDI
ND.-NDJ
ND
ND
31
31
--1
N=DND
2
GUMS METHODS (ug/1)
Vinyl chloride
ND NDJ 5J 4,J --I ND,
IChloroethane
ND
ND
36
ND
24
ND
ND
IMethylene chloride
UR
NDI
108
ND
8JB
ND
---
14
Acetone
D
NDI
ND
-�LD-
RD-
ND
1,1-Dichloroethene
13
ND
17
ND
12
ND
97
I,I-Dichloroethane
63
ND
120
ND
81
ND
180
1,2.Dichloroethene
ND
ND
2601
NDI
180
130
Chloroform
ND
ND
ND
NDI
ND
ND
NEI
I-,,,] �Trichloroethane
28
ND
12
NDI
51
ND
70
Trichloroethene
ND-
ND
NO
ND
ND
ND
44
Benzene
NDJ
ND
ND
ND
ND
ND
Tetrachloroethene
ND
ND
7J
ND
ND
ND
55
Benzoic Acid
ND
ND
33
ND
ND
N51---]
ND
Di-n-butylphthalate
10
ND
ND
NDI
NDI
ND
ND
NDI
--I
ND
bis(2-Ethylhexyl) plithalate -- 3,111
TOTAL METALS (mg/1)
17.8 '-1 37DI
ND
3J
Lead
ND
0.012
NO
0.00-�
Barium
0,22
U6
0.73
0,33
OJ5
ND
0.28
Calcium
55
78
76
--
Chromium
ND
--
0.06
--
ND
U1
Iron
16
26
3.4
Potassium
6.4
ND
ND
Magnesium
251
--1
--1
--1
501
--1
-.1
--1
--1
411
Sodium
--1
-.1
261
--1
-.1
--1
.-1
311
INORGANIC PARAMETERS
(mg/B
Ammonia-N
--
ND
ND
Bicarbonate
-ND
110
--
130
-
190
Chloride
120
eo
150
2'0
210
170
190
COD
73
--
--
Nitrate
ND
ND
ND
-
0.02
0 - u2
0.07
0.03
Orthophosphate
ND
ND
-
=ND
ND
--
PH
64
6.9
Silica
-
28
35
31
Sulfate
18
&5
44
32
34
34
T�ro-ta­[ D i sso lv, ed S -ol
so
460
400
5001
580
540
570
ids
'I C o*
otal Organic Carbon*
T TotL
P
Total Phenols
Tot I
Not analvzed ND Not
3
D
ND
Detected
-
Not Preserved
141
ND
I Estimated
--1
Concentration
-
,
B Detected
in Blank
4.4
ND
--
npde�,Ibl I X18

�LE I
-noca. .. ------- d Ct -fmcr
d Water Summary of Detected Compounds
Page 2 of 9
tydestbi L x1s

I --, Jnoca d Cri.—.— -.,.ner V--,
Ground Water Summary of Detected Compounds
Page 3 of 9
MW-'1A
1/9
01/21/93
11/15/95
-
01/23/92
-
10/15/92
ND
-
01/20/93
01/19/95
28,7
ND
11/16/95
1
ND
01123/92
—
10116/92
1
ND
01/28/93
—
01/19/95
ND
11115195
ND
07/06/94
11/15/95
ND
01/23192
10/14/92
ND
ND
01120/93
06/28/94
ND
7NTW—rT1—XV7A
H/15/95
ND
01/23192
CC METHODS
=gj
Vinyl Chloride
Chloroethane
Wt—hyle.e6l.nd.
lj-Dicldoroetben�
7
lio
32
750
24
170
—
ND
4
155
66� t
13
ND
ND
14
NO
NO
ND
ND
ND
NI)
IJ-Dicliloroetha2e
190,
965,
22m
8
150
10
20,
—
Nn
ND
ND
NDI
Chloroform
1,2-Dichloroethane
ND
17
3,12
ND
0A
ND
ND
ND
ND
ND
NDI
ND
NDJ
ND
—
ND
ND
--I
-.1
ND
ND
NDI
NDJ
1,2-Dictilaroethe2c
1, 1, 1 -Trichloroethatie
ND
360
5.9
656
6.9
1600
NDI
18
ND
713
L8
250
ND
10
ND
1
--I
ND
ND
NDJ
NDJ
Trichloroethene
9
29.3
63
ND
1.58
16
0�8
ND
ST)
ND
Tetrachlaroethene
65
346
260
2
3171
93
1.8
-1
ND
ND
ND
Benzene
ND
4.12
13
ND
NDJ
51
--1
ND
--I
ND
ND
N D
Ethylbenzene
ND
ND
ND
ND
NDJ
NDI
-.1
NDI
--I
ND
ND
ND
Toluene
ND
ND
ND,
--I
ND
NDJ
NDJ
-.1
NDJ
..I
ND
ND
ND
Xylenes (total)
ND
--t-255.1
621
--1
FM
I --I
NDJ
21
--1
NDJ
NDI
ND
GC/MS METHODS (ug/1)
Vinyl chloride
NDI—,,
ND
NDI
ND
NO
Chloroethane
NDI
ND
ND
ND
ND
—17B
Methylene chloride
.8
438
ND
168
—ND
Acetone
ND
ND
10
ND
ND
IJ-Dieldoroethene
1, 1 -Dichloroethane
55
100
ND
ND
43
7J
ND
ND
ND
ND
1,2-Dichloroethene
ND
ND
ND
.-I
NDI
—I
ND
Chloroforni
ND
NDJ
ND
ND
.-I
NDI
NDI
ND
ND
1 1,1,1-Trichloroettiane
.-1
71
160,
ND
6
12
NDI
ND
ND
ND
'Trichloroethene
--I
NDJ
ND
ND
ND
ND
Benzene
Te—trTIC-1110roethene
-.1
--1
NDJ
331
ND
ND
ND
ND
ND
ND
ND
ND
bis(2-Ethylhexyl) plithalate
—
I Nbl
5�61
2J8
ND
33B
TOTAL METALS (mg/1)
Lead
— ND
—
0.016
ND
—ND
'6a—riuto
0.62
an
0,29
6.6
(t,72
0A2
Calcium
210
71
--
99
47
3-1romium
—
ND
—
O�6
ND
—
fron
5�9
1.9
20
17
liotasshuni
Magnesium
ISodium
I
70
:F3
—1
ND
321
431
--1
--1
ND
391
1601
--1
—1
--1
-1
5.1
151
291
"d
—1
--
1
NETHOD 8270 TICs (ug/1)
Cyclohexyl-utidecane isianer
Dodecanoic Acid
2
ND
ND
ND
ND
9
ND
ND
Edianol-2,2'oxybis
N
ND
14
Hexanoic Acid
ND
ND
3
ND
Octanoic Acid
ND
ND
3
ND
Total Unkown TICs
128
31
55
5
INORGANIC PARAMETERS
Bicarbonate
(mg/1)
240
53
2"
—
89
BOD
—
ND
5.6
Chloride
596
—6 10
—ND
—240
ND
310
110
ND
44
ND
COD
--
--
ND
38
—
Nitrate
ND
0.03
ND
2.8
NI)
k62
ND
032
ND
P
Silica
7.6,
35
6.5
73
23
6.7
50
Sulfate
13
ND
20
::::ND
;7
--I
NDI
-.1
66
......
ND
—T—Dissolved Solids
Tota
—1100
—1580
—ND
—6 10
D
goo
NDI
--I
300
ND
—T—tr ND
Not Det=e7tcT—"'T
=-tPe'servel
—T-=Ts`Tu-n
a-77oncentration
B —
Detected in
Blank
__j
"p&"NIAS '

�A RLE I
Unoc� A Cn- mer F
Ground Water Summary of Detected Compounds
Page 4 of 9
MAM
son
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-- -- Not analyzed ND = Not Detected Not
-- -- Not analyzed ND = Not Detected Not

—'—LE I
Former Unocal Mallard Creek rotymer rjant
Ground Water Summary of Detected Compounds
Page 9 of 9
I
' - RES-3
-
-
RFS-7
I-
S-9
11/27/95
11/27/95
11/27195
11/27/95
11/27/95
11127/95
11/27/95
12/12/95
11/27/95
11/27/95
CT -'IFS (ug/1)
Vinyl Chloride
Chloroethane
Methylene chloride
1,1-Dichlorneffiene
I,I-Dichloroethane
Chloroform
1,2-Dichloroethatie
1,1,14'richloroethane
Trichloroethene
Tetrachlorocthene
Di-n-butylphthalate
GC/MS METHODS (ug/1)
Vinyl chloride
ND
ND
NO
ND
NI)
I ND
ND
—ND
NO
ND
ND
Chlorobenze-ne
NO
ND
NO
ND
ND
RD—
ND
ND
NO
Methylene chloride
98
ND
ND
ND
ND
ND
ND
ND
ND—
NO
Acetone
42B
ND
ND
ND
ND
ND
ND
ND
ND
ND
1,1-Dichloroethene
ND
NO
ND
ND
ND
0.4
3
3,
ND
ND
I,I-Dichloroethane
NO
ND
NO
ND
ND
ND
6
6
ND
NO
1,2-Dichloroethene
ND
ND,
ND
NO
ND
ND
3
4
ND
ND
Chlorofiann
ND
NO
ND
ND
ND
ND
ND
ND
ND
ND
13 1, 1 -Trichloroethane
ND
ND
"NI)
—ND
—ND
—ND
—ND
—ND
NO
NO
Trichloroethene
NO
ND
ND
ND
ND
ND
11
2
ND
ND
Benzene
ND
'j
ND
ND I
NDI
ND
ND
ND
ND
I ND
ND
Tetrachloroethene
ND
—ND
ND
ND
Ni)
�N D
ND J
ND
I ND I
ND
TOTAL METALS (m(/1)
Lead"
Selenium
Barium
=Calci or
Chromium
Iron
Potassium
Magnesium
Sodium
INORGANIC PARAMETERS (mg/1)
Bicarbonate
BOD
Carbonate
Chloride
COD
Nitrate
pH
Silica
Sulfate
jTDS
-- = ot analyzed ND
Not Detected
Not Preserved
J =
Estimated Concentration
B =Detected
in Blank

TENTATIVELY IDENTIFIED COMPOUNDS
LABORATORY L E

ATEC Associates, Inc.
IVEnvironmental Consultants C"A`�EDITM
5150 East 65th Street
Indianapolis, Indiana 46220-4871 Solid & Hazardous Waste Site Assessments
[phone], FAX [phone] Remedial Design & Construction
Underground Tank Management
Asbestos Surveys & Analysis
Hydrogeologic Investigations & Monitoring
Analytical Testing / Chemistry
August 11, 1994 Industrial Hygiene / Hazard Communication
Environmental Audits & Permitting
Exploratory Drilling & Monitoring Wells
Mr. Tom Kuebrich
Maude Environmental
5600 S. Quebec Street, Suite 113A
Greenwood Village, CO 80111
Re: Six Water VOA, BMA
Mallard Creek Polymer Plant
Unocal
A Work Order Number 9406444
ATEC Project Number 21-08-94-00282
Addendum
Dear Mr. Kuebricb:
Attached is a sixteen page report of results for the Organic Analyses for the six water samples
which were submitted to the A Environmental/Analytical Testing Division on June 30,
1994, on behalf of Unocal. The volatile samples were analyzed on a Finnigan Incos XL
GC/MS/DS system, complete with Superincos Software, via U.S. EPA Method 624 for
Purgeable Organic Compounds. Prior to analysis, the system was tuned against Bromo-
fluorobenzene and calibrated with the appropriate standard. Semi -volatile analyses were
performed on a Finnigan Incos 50 GC/MS/DS system via U.S. EPA Method 625 for
Extractable Organic Compounds. Prior to analysis, the system was tuned against Decafluoro-
trip henylphosphine and calibrated with the appropriate standard.
The analytical procedures are performed =in accordance with the A Analytical Standard
Operating Procedures, which are based on the methods referenced in this report. These SOPS
are available for your review upon request.
Regarding the conversation on August 10, 1994 with Lisa as requested, volatile and semi -volatile
tentatively identified compounds are included in this addendum. Please insert these results in
the original report behind the appropriate sample target compound list for each well. Any
associated Quality Control information will be maintained in the Testing Division files, a copy
of which can be forwarded to you upon request. After a thirty -day period, a fee will be assessed
for this additional information.
Arnerican Testing and Engineering Corporalion
Offices go m,,,t)or U S Cities/since 1958

A Definition of LIMS Te-ms is in(
are any questions CU11CC11U11g
Respectfully submitted,
A ASSOCIATES, INC.
A
Brenda L. Keller
SVOC Group Leader
Environmental/Analytical
Testing Division
BLK/feb
convenience. Two copies

Unocal
order #: 94-06-444
1650 East Golf Road
Date: 08/11/94 13:33
Schaumburg, IL 60196
Work ID: Mallard Creek (2108-9400282)
Date Received: 06/30/94
Attn: Christopher Meyer
Date Completed: 08/11/94
Invoice Number:
cis 1,2-DichLoroethene was detected in the following samples
at these approximate amounts;
MW35A 510ppb, MW36A 440ppb,
MW36 540ppb. This compound is
not an anaLyte of US EPA Method
624.
SAMPLE IDENTIFICATION
ATEC Client
ATEC Client
Sample Sample
Sample Sample
Number Descriotion
Number Description
01 MW-68
02 MW-7
03 MW-19
04 MW-25
05 mw-35A
06 MW-36A
07 MW-36
This report shall not
be reproduced except
in full, without approval of the Laboratory.
Certified By
Brenda L. KeLter

ATEC Associates REPORT stork Order- # 94 06-444
Received: 06/30/94
SAMPLE ID; MN 7" TEST CODE VOADD NAME Additionat Target CP s
FRACTION 02A Date & Time Cottected D6/28t94 Category WATER
DATE ANALYZED Cf7Z01/94
INSTRUMENT Incas XL
DILUTION FACTOR 1'
ANALYST T. Harrison
VERIFIED BY M. McGitt
UNITS ugjL
C014MENT
ANALYTICAL METHOD US EPA Mtd- 624
TENTATIVELY 7CLiENTIFIEI7 CtMpQtJNDS
CAS NUM&ER CONFOUND NAME RT EST.'CONC.
12_4-38-9 Carbon dioxide 07:25 18
76-13-1 Ethane 1 1 2-trichtoro- 97.50 34
1 2 2 triftuoro-`
11i3-54-3 Hexane G9.25 9

ATEC Associates REPORT Work Order # 44 06-444
Rccc s ved. 06/30/94
SAMPLE ID Mu-7 TEST CODE SVOADD NAME Adel. Target Cpds-SEMI-VOL .
FRACTION 02A Date Time Cot€ected g6/28194 Category tJATER
DATE EXTRACTED g77g5144
DATE ANALYZED OZLP! L94
INSTRUMENT incos BS2
DILUTION FACTOR 1
ANALYST S. Kt ton
VERIFIEDBY M. McGitt
UNITS ugfL
C0NNENTS:
ANALYTICAL METHOD US EPA Mtd. 625
TENTATIVELY IL3ENTIFIEU COMPOUNDS
CAS NUMBER COMPOUND NAME RT EST'CCONC.
q-gq-q Unknown
` g2:30 8
556-67.2 Cyctotetrasitoxane, octa_ 07:08 7
methyt-
0-qq-q Unknown 10.34 7

AfFC Associates REPORT Work order N 94-O6-444
Received: 06/33/94
SAMPLE ID Mid-19 TEST CODE VOADD NAME Additional Target CPds
FRACTION t93A Date & Time Collected tlbl2B/94 Category; WATER
DATE ANALYZED OZLa /94;
INSTRUMENT Incos XL=
DILUTION FACTOR 1'
ANALYST T. Harrison
VERIFIED BY M. McGill
UNITS ucsft
CONVENT:
ANALYTICAL METHOD US EPA Mtd. 624
TENTATIVELY IDENTIFIED C Q M P O U N D S
CAS NUMBER COMPOUND NAME RT EST. CONC.
64-17-5 Ethanol D5.30 4

ATEC Ass'aciatcs REPORT titlark larder # 94-06-444
Rece a vets: 06/30/94
SAMPLE ID Mti1-19
TEST CODE SVOADD
NAME Ad�I. TargeE M II-Vt?'w
FRACTION 03A Date & Time
Caltected E;6t28t94
Category WATER
DATE EXTRACTED
0C75 4
DATE ANALYZED
G It16194
INSTRUMENT
Inc0s BS2
DILUTION FACTOR
1
ANALYST
S. Kern ton
VERIFIED BY
M. McGitI
UNITS
-L
COMMENTS:
ANALYTICAL METHOD
US EPA Mtd. 625
TENTATIVELY
I P LE NTIF E D -COMPOUNDS
CAS NUMBER COMPOUND NAME ' RT
EST. CONC.
tt-OITG
Unknown 02.29
6
0-00-0
Unknown 0.-32
9

ATEC ASSOclat S REPORT Work Order #t 94-06-444
Neceiy d: 06/30t94
SAMPLE ID Mw-25 TEST CODE VOADD NAME Add ittanat Taf>c c Cgds._
FRACTION 04A Date & Time Cattested C)b�4 Category wLkLE R
DATE ANALYZED OZLQ.IZ94
INSTRUMENT Incas XL
DILUTION FACTOR I
ANALYST T. Harrison
VERIFIED 8Y M.-McOitt
UNITS I
014NEUT
ANALYTICAL METHOD US EPA Mtd. 624
TEN POUND
CAS NUMBER COMPOUND NAME RT EST. CONC.
0. 0 0--0 Unknown 05:24 5
3278-46-4 Pro anoic acid 2 - it#:33 Z
`trichtora-

ATEC Associates REPORT
Work order # 94-06-444
Received: 06/30/94
SAMPLE ID tW-25
TEST CODE SVOADD NAME Ldd. Tar_qeL_Cpd -SEMl-VqL--
FRACTION 04A Date & Time
CotLected
Category WATER__
DATE EXTRACTED
O7LQ5_L94
DATE ANALYZED
07ZSIL94
INSTRUMENT
Incas BS2
DILUTION FACTOR
1
ANALYST
S. KIMpton
VERIFIED BY
M,±cGiLt
UNITS
COMMENTS:
ANALYTICAL METHOD
US 625
_EPAMtd-
TENTATIVELY
IDELNTIXIED COMPOUNDS
CAS NUMBER COMPOUND }LAME RT EST.
CONC.
0-00-0
tinknown _.02 * 29
4
0-00-0
Unknown _18-32
17
0-00-0
Unknown _10-32
11

ATEC Associates REPORT Work Order 9 94-06-444
Received: 06/30194
SAMPLE IL M -35A TEST CODE VOADD NAME Additr`anat Target Cods
FRACTION"05A Date & Time Collected 06128194 Category WATER
DATE ANALYZED 07L 1i94
INSTRUMENT Incos XL
DILUTION FACTOR 1
ANALYST T. Harrison
VERIFIED BY M. McCiLE
UNITS u L
C014MENT:
ANALYTICAL METHOD US EPA Mtd. 624
TENTATIVELY IDENTIFIED COMPOUNDS
CAS NUMBER: COMPOUND NAME Ri EST» CONC:
0-00-0
Unknown
05:25
6
0-00-0
Unknown;
05.28
5
76-13-1
Ethane 1 1 2-Trichtoro-
07.53
15
-
1 2 2-trift`u0ro-'
156-59-'2
cis-1 2®Dichtoroethene
10.35
510

ATEC Associates REPORT Work Order # 94-06-444
Received: 06/30/94
SAMPLE ID MW-35A
TEST CODE SVOADD NAME Add. Tar�e#et Cads S EMI-VOL.
FRACTION 05A ' Date & Time
Cottected D6f28P 4 Category WATER
DATE EXTRACTED
071D5194
DATE ANALYZED
07I06I94
INSTRUMENT
Incos BS2
DILUTION FACTOR
1
ANALYST
S. K 2ton
VERIFIED BY
M. McGit't
UNITS
tnll
COMMENTS:
ANALYTICAL METHOD
US EPA Mtd. 625
TENTATIVELY
IDEATTIFIED COMPOUNDS
CAS NUMBER COMPOUND NAME RT EST. CONC.
0-00-0
Unknown 03:21 50

ATEC:a5Sociates REPORT Work order # 94-06-444
keceived: 06/30/94
SAMPLE 10 MW-36A TEST CODE VOADD NAME Additional-
Target Gilds
FRACTION t78A gate &e: Time Cot te;cted 06l28_j94 Category WATER
BATE ANALYZED 0 01/94.
INSTRUMENTIncas XL
DILUTION FACTOR' 1
ANALYST T. Harrison;
VERIFIED 8Y M. Mtct__it I
UNITS uctJL
CONNEUT:
ANALYTICAL. METHOD US EPA Mtd. 624
TENTATIYELY IDENTIFIED COMPOUNDS
CAS NUME3ER COMPOUND NAME RT `EST. CC}NC.
10312-83-1 Acetatdeh de mathoxy- 05:12 18
0 - 0 0 - 0, Unknown 07a52 10
156-59-2' cis-1 2-Dichtoroethene 10:35 440
102- 00-3 CycIohexene. 4-ethenyt- 16.25 10
108-38-3 Benzene 1.3-Dimethyt- 18.13' 5

AIEC A&&ociates RE POP I
Work Order # 94 06-444
keceived��
06/30/94
SAMPLE ID
MW-36A
TEST CODE
SVOADD NAME Add, C ds-SEMI-VOL.
LqA---T-3-r-aL —t.-P----
FRACTION
06A Date &
Time Cot Lected
Category �LAT,�R__
.. . ... .. . ....
DATE EXTRACTED
0 710
5 L 9 4
DATE ANALYZED
. . . . . . 07LO6194
INSTRUMENT
InC2�
DILUTION FACTOR
ANALYST
S. K2ppton
VERIFIED BY
McGi L I
UNITS
tlm/l
COMMENTS:
ANALYTICAL METHOD US EPA Mtd. 625
TENTATIV
s
CAS NUMBER
COMPOUND NAME
RT _EST-
CONC-
141-79-7 3-Penten-2-one,_A.: �th
2 _.-O 9
120
0-00-0
Unknown
0 2 :15
9
0-00-0
Unknown
0 2 : 32
39
n-nn-n
Unknown
_2 2 _,3 8
7
0-00-0
Unknown
03:21
10
0-00-0
unknown
07:09
7
556-67-2 Cyclotetrasilokang,,2,2ta-
07:17
280
methYL-
—
0-00-0
Unknown
0 7: 5 0
9
0-00-0
Unknown
10:10
6
0-00-'0
unknown
_10 _.4 0
0_0
0-00-0
___ILnknown
85-44-9 1,3-Isobenzofurandione
_13.18
13
540-97-6
1 asiLoxane
Cyc t ohexp,Ej
13:48
130
-
dodeqqm,ejty!,--
—
—
0-00-0
llnvn^un
_16*36
16
0-00-0
Unknown
18:37
5
0 - 0 0 - 0
Unknown
18:42
8
0-00-0
Unknown
_.O 0
10
0-00-0
Unknown
23 : 40
14
0-00-0
Unknown
23 : 46
6

/30/94
-AA
ST'CODE VOAD+
Dato & Time Cottected 0
ATE ANALYZED 07/01194
NSTRUMENT Incos XL
ILUTION FACTOR 10
NAI.YST T. Harrison'
ERIFIED 6Y M. McGitt
NITS 119I1
ONMENT:
WALYTICAL MET -HOD US EPA Mtd. 624
r nu rInt1
IlNgREEM
RT EST.: CONC
} 10.35
5400
11:37
190
16:32
980
770
17:40
18:22
4000
18:59
630
103-65-1
Benzene, Pro2yt-
19:42
360`
620-14_4 Benzene.
1 Ethi 3 methyl
19:50
280

ATEC Associates REPORT
Work Order # 94-06-444'
Receiyed: 06/30/94
SAMPLE ID HN-36
TEST CODE
SVOADD NAME Add. Target Cods-SEMI-VOL.
FRACTION 07A Date & Time Cottected 06l28/94
Category WATER
DATE CXTRACTED 07/05/94
DATE ANALYZED 07ja6/94
INSTRUMENT
Incas BS2
DILUTION FACTOR
1
ANALYST
S. Kemtston
VERIFIED BY M.
McGill
UNITS
UsfL
COMMENTS:
ANALYTICAL
METHOD US EPA Mtd. 625
"i' NTAT`IVELY
I}ENTIFT,EI
GC?MPC�uND
CAS NUMBER
COMPOUND NAME
RT EST.;
CONC-
1a8-88-3
Benzene, MethYE-
01:49
260:
127-18-
T trachtoroethene
92:17
340
0-00-0
Unknown
02: 23
15
lqq-40-3
Cyctone ene, 4-Eth nYt
a2:40
390
100-41_4
Benzene Ethyl-
03.16
590
95-47-6
Benzene 14 DimethYt-
03:2
260
108-93-0
C ctohe anot
03:46
58
629-20-9
1.3.5 7-C-ctooctatetraene-
a4:02
380
0-00-0
Unknown
- 24:43
74
7214-61-1
Benzene, --Cl--n i tr0ethYI)-
94:56
180'
300- 77-2
Benzene, 2 ProoenYl-
a5:29
49
103-65-1
Benzene, PropyI-
05:41
140
62a-14-4
Benzene. ;1 EtnXt 3•raetnYt
15:54
130
98-83.9
Benzene.(1-MethYtethenYt)'
06:25
49
111-90-0
Ethanol. 2-(2-ethoxY-;
07:2"0
120
eth�xY)-
100-51-6
Benzenemethanot
07:59
51
177-01-6
1 4-Di0xas piiro 4.5]clecane'
08:26
33
98-86-2
Eth`anone 1-PnenYt-
a8:32
230
0-00-0
Unknown
12:02
110
a-Qa-a
Unknown
20:52
56
0.00-0
Unknown
21:41
92
95-83-9
23:56
34
0-00-0
Unknown
31:04
78
0-00-0
Unknown
34:O0
59

ATE
ank
Date $ Time Cott
)dates REPORT Mork Order # 94-06-44,
d Category DATER
07J01J94
incos XL
FACTOR 1
T. Harrison
BY M. McGiLI
uq/L
kL METHOD U EEPA Mtd. 624
ryELY II3ENTIFI;ED CUMPC7 NiJS
COMPOUND NAME RT = EST: CONC.
_ Unknown 04:58 17
Unknown 05:00 16
_ Unknown 05:02 13
1 Ethane 1 1 2-trichtoro- 07.50 26
_ 1 2 2-triftuoro
Hexane 09,25 6

ATEC Associates REPORT Work order # 94-06 444
Received. 06/30/94
SAMPLE ID Method Stank
TEST CODE SVOADD NAME Add. Target Cpds-SEMI-VOLT.
FRACTION 078 Date & Time
Cottected Category WATER
DATE EXTRACTED
07j05/94
DATE ANALYZED,
07/O6/94
INSTRUMENT
incos BS2
DILUTION FACTOR
1
ANALYST
S. Kemot n
VERIFIEDBY
M. McGitt
UNITS
uq/L
COMMENTS
ANALYTICAL METHOD
US EPA Mtd. 65
TENTATIVELY
IDENTIFIED COMPOUNDS
CAS NUMBER COMPOUND NAME RT EST. CONE.
None found

PROJ. NO. PROJECT NAME IJWOCP,—
C't"'Fl ,
LAB PROJ, NO.
1 '.4 r6 C
'V e
l,e
/ LABORATORY ANALYSIS
9 Ck
CLIENT �, CA -
SAMPLERS: (Signature)
x
SAMrLING METHOD
w
U. cc
t
r)
0 w
0) 0
"I
I
A�'
SAMPLE DATE TIME
a.
0
Ca
Ir
w
<
0
w
8
6
w
Cc �—
z
0
CD
CO2
<:)
'd AO q
LD, NO,
zu
-J z
J0
I�L—o
X
LI:
X4-
--9�
2
J
r
i(k PM
U Ise
Relinquished by: (Signature)
Date I Time Received by: (Signature) Relinquished by: (Signature) gnature) Date I Time Received I
Relinquished by, (Signature)
Date f Time Rec J r L oratory by: Date Time Project Manager / Phone #:
'
=gnature)'
't

ATEC Associates, Inc.
1WEnvironmental Consultants C"A:�E�DITW
51
50 East 65th Street
indianapolis. Indiana 46220-4871 Solid & Hazardous Waste Site Assessments
[phone]FAX [phone] Remedial Design & Construction
Underground Tank Management
Asbestos Surveys & Analysis
Hydrogeologic Investigations & Monitoring
Analytical Testing / Chemistry
Industrial Hygiene / Hazard Communication
August 11, 1994 Environmental Audits & Permitting
Exploratory Drilling & Monitoring Wells
Mr. Tom Kuebrich
Maude Environmental
5600 S. Quebec Street, Suite 113A
Greenwood Village, CO 80111
Re: Two Water VOA, BNA
Mallard Creek Polymer Plant
Unocal
A Work Order Number 9406436
A Project Number 21-08-94-00282
Addendum
Dear Mr. Kuebrich:
Attached is an eight page report of results for the Organic Analyses for the two water samples
which were submitted to the ATEC Environmental/ Analytical Testing Division on June 30,
1994, on behalf of Unocal. The volatile samples were analyzed on a Finnigan Incos XL
GC/MS/DS system, complete with Superincos Software, via U.S. EPA Method 624 for
Purgeable Organic Compounds, Prior to analysis, the system was tuned against Bromo-
fluorobenzene and calibrated with the appropriate standard. Semi -volatile analyses were
performed on a Finnigan Incors 50 GC/MS/DS system via U.S. EPA Method 625 for
Extractable Organic Compounds, Prior to analysis, the system was tuned against Decafluoro-
triphenylphosphine and calibrated with the appropriate standard.
The analytical procedures are performed in accordance with the ATEC Analytical Standard
Operating Procedures, which are based on the methods referenced in this report. These SOPS
are available for your review upon request.
Regarding the conversation on August 10, 1994 with Lisa as requested, volatile and semi -volatile
tentatively identified compounds are included in this addendum. Please insert these results in
the original report behind the appropriate sample target compound list for each well. Any
associated Quality Control information will be maintained in the Testing Division files, a copy
of which can be forwarded to you upon request. After a thirty -day period, a fee will be assessed
for this additional information.
American Teshn�.-1 and Engineering Corporation
Offis ct'in Ma�oT U'S Clt!es Since 195",

A Definition of LIMS Terms is included in this report for your convenience. Two copies of this
Analytical Report are being provided for your records. Additional copies can be provided at
a minimum cost of $30.00 per copy. It has been a pleasure serving you and, as always, if there
are any questions concerning these results or the ATEC policies, please feel free to contact me.
Respectfully submitted,
ATEC ASSOCIATES, INC.
Brenda L. Keller
SVOC Group Leader
Environmental/A-nalytical
Testing Division
BLK/feb

Unocat
order #s 94-06-4 6
1650 East Gotf Road
Date: 08/11/94 13:36
Schaumburg, IL 60196
Work ID: Mal,tard Creek (2108-9400282)
Date Received: 06/30/94
Attn°. Christopher Meyer
Date Compl,eteds 08/11/94
invoice Number-
SAMPLE IDENTIFICATION
ATEC Ctient
ATEC Ctient
Sampte Sampte
Sampte Sampte
Number Descript9on
Number Description
01 MW-35
02 MW-16
This report shal,t'not
be reproduced except
in futt, without
approval, of the Laboratory.
?-e�rtified By
Brenda L." Ketter

ATEC Associates REPORT Work Order # 94-06-431
30/94
35 TEST CODE VOADD; NAME Additional Target Cpds
FRACTION 01A Date & Time Collected 06/2t3f94 Category SATER
DATE ANALYZED 06/ 0194
INSTRUMENT Incas XL
DILUTION FACTOR 1
ANALYST T. Harrison'
VERIFIED BY M. McGiLt
UNITS uglL
COMMENT:
ANALYTICAL METHOD US EPA Mtd. 624
TENTATIVELY IDENTIFIED -COMPOUNDS
CAS NUMBER COMPOUND NAME RT EST. CONC,
67-63-0 2•Propanot 05.22' 5

ATEC ASSOCiates REPORT Cork Order I# 94-06-436
Received. 06/30/94
SAMPLE ID MW-35 TEST CODE SVOADD NAME Add. Target Cpds-SEMI-VOL.
FRACTION'01A Date & Time CoLLected 06/281 4 Category WATER
DATE EXTRACTED OZLQSy94
DATE ANALYZED 0ILI5,94
INSTRUMENT Incos as
DILUTION FACTOR 1
ANALYST S. Kempton
VERIFIED BY M. McGHL
UNITS uolL
COMMENTS.
ANALYTIC -AL METHOD US "EPA Mtd. 625
TENTATIVELY IDENTIFIED COMPOUNDS
CAS NUMBER COMPOUND NAME RT EST. CONC,
0-00 0 Unknown 02:5'5 7

ATEC AssociatCS REPORT Work Order # 94-06-436
Received: 06/30/94
SAMPLE ID Mtn-16 TEST: CODE VOADD NAME Add'itionat Tar9et Cpds
FRACTION 02A Date & Time Cottected 'Ci6t28/94 Category tATE€d
DATE ANALYZED 06 20 94
INSTRUMENT Incos XL
DILUTION FACTOR 1
ANALYST T. Harrison
VERIFIED BY M. McGitt
UNITS U L
COMMENT:
ANALYTICAL METHOD US EPA Mtd. 624
TENTATIVELY IDEN FIE CQMP0UNIDS
CAS NUMBER COMPOUND NAME RT EST. CONC:
0-00-0 Unknown 05.24 6
0-00-0 Un nonw 05.27 5
76-13-1 Ethane 1 1 2•trichloro- 07:46 41
1 2 2-trittoro
156- 9- cis-1 2-Dichtoroethene 10.30 250

A'
06/30/94
mu-16
aciates REPOG
Work order # 94-06-436
FRACTION 02A Dat, & Time Collected 06 8/94 Category WATER
DATE EXTRACTED 0Z,Z05f94
DATE ANALYZED 07C0S144
INSTRUMENT Incos as
DILUTION FACTOR 1
ANALYST S. Kempton
VERIFIED 6Y M. McGill
UNITS ugtt
C014MENT!S-z
ANALYTICAL METHOD US EPA Mtd. 625
TENTATIVELY IDENTIFIET `COMPOUND'_
CAS NUMBER COMPOUND NAME RT EST CONC.
None found

ATEC Associates REPORT Work Order # 94-06-436
Received: 06/3 /94
SAMPLE ID Method Stank TEST CODE'VOADD NAME Additionat Target Cpds
FRACTION 02B Date & Time Cottected Category bATER
DATE ^NALYZED 06LI 94
INSTRUMENT Incos XL
DILUTION FACTOR I
ANALYST T. Harrison
VERIFIED SY M. McGitl
UNITS —/l
C014MENT
ANALYTICAL METHOD US EPA Mtd. 624
T-ENTATIVELY IDENTIFIED —COMPOUNDS
CAS NUMBER: COMPOUND NAME RT EST. CONC.
None found

ATEC ASSOCiatcS REPORT Work Order # 94-06-436
Received: 06/30/94
SAMPLE ID Method Stank TEST CODE SVOADD NAME Add. Target Cods-SEMI-VOL,
FRACTION 028 Date & Time Cottected Category bATER
DATE EXTRACTED QZ fI 4
DATE ANALYZED 07 06 94
INSTRUMENT Incas BSA
DILUTION FACTOR 1
ANALYST S. KgMpton
VERIFIED BY M McGitI
UNITS uglL
COMMENTS.
ANALYTICAL METHOD US EPA Mtd. 52
TENTATIVELY I E TZF D G®MPQUNDS
CAS NUMBER COMPOUND NAME RT EST. CONC.
None ;found

ATTACEMENT D
REMOVAL E I IENCv
Former Unocal Mallard Creek. Polymer Punt
Ground Water Corrective Action
TIES Permit Application
The estimated influent and effluent concentrations for the significant indicator parameters
listed in Attachment C are shown in Figure 5. Removal efficiencies for all compounds
except vinyl chloride and methylene chloride are estimated to be ° ing carbon
adsorption. The actual concentration of vinyl chloride in the recovered group water is
anticipated to decrease rapidly as the water becomes more oxygenated, thus reducing the
formation of anaerobic degradation products. The concentration of methylene chloride in
the treatment systeminfluent should also decrease as the ground water near R=1 that
contains the higher concentrations of methylene chloride is removed, and ground water with
lower methylene chloride concentrations enter RW-1

- - ------ -----
w,
7S
K's-8 ------ - --- -
A
MECKLENBURG
COUNTY LINE LIL,
680
Lug
640
z
A P
0000,
A UJ
STOWE'S CHURCH
A
nos-4
'-0
APPROXIMATE SITE 0 "N MW-22
RES-5
PROPERTY BOUNDARY
R S-3
VW-26 MW- 20A
""-'A 1"W -,15A
A
Mw-71aw-z pew
1
5 chunk weft 'Aw
"W-4
WW-6A
660 MW-36A Q-
W-19 \
u-7 MW-36 M-25
v- 6
U-2
640 mw-,q MW '28 0
Mw ---------------- �0
80
U-4
Mw-5A LAJ
41
mw-,30
APPROXIMATE PLAN
700 -\-/�BOUNDARY MW-13 Mw-s" taw-324�
-L.-EGEND W-9
TRUCK PARKING A EA MW-94
Monitoring Wc-11 72'0 720 AOW-15
Mw-- 15
A Former Water Supply Well
U-7 Q)
A REResidential Water Supply Weli 700 680
S-2
Approximate Site Property Boundary
Approximate Plant Boundary CD 0
400 0 400 800 FEET C)
I LN
Z-
SCALE

See Detail C, Figure 3
Surface Cased Well Schematic
RW-2
AUnnamed Tributary To
RW--- 4 Mallard Creek
(RW
WASTEWATER
Ground —Water POND
X Z
See Detail B, Figure 3 Treatment Building 0—
0
Piping Trench Schematic
NPDES Outfoll
RW- 1µ See Details D and
Treated Water_ --.---- and E, Figure 4
_0 Discharge Pipe
1' RME R
,oa
SLUDGE DRYING SLUDCE
AREA PIT =0
DAF ME CAFTAN
o]
Approximate Location of LTRUCKa UNLOr
ADING TANK TRUCK AN KL:
NLOADING PA
AREA URip—Rap
Road Crossing �' re
Eln_'] TRUCK VINYL CI
1 01 UNLOADING A ETATE
FA] 0 0 OFILIF L AREA
SIORAGE TANK
r
CP
RW-3 0
LAB AND lIR WAIER
OND
()FFICES
See Detail A, Figure 3
—`- I 5p
5
WAR75
Concrete Vault Schematic 00-0000
.1EHOUSE
­
00
PROCESS P
VAC BUILDING
BUILDING BUILDING
0
Fit -TER
jE Q j� LEN BUILDING _0
A Former Water Supply Wall
e
R-1 Proposed Ground Woter RecoverA WI! AD ------
Approximate Site Property Boundary _X T-7
Piping (Below Grade) See Figure for Detail ------ _____ ----- --- -----
Piping (Above Grade)
FIGURE 2
GROUND —WATER RECOVERY SYSTEM LAYOUT
Note. Locations are approximate, Former Unocal Mallard Creek Polymer Plant
200 0 200 Feet
Charlofte, North Carolina
_j
SCALE Pro'ect No, 3852,96 LEVINE-FRICKE
MWEEPS, HYDROGFOLOGoTS, & APP,ED SODNRSIS

Detail A Detail B Detail C
TYPICAL TYPICAL
PRECAST CONCRETE VAULT SURFACE CASED WELL
WATER-TFGHI BOLTED TYPICAL PRECAST CONCRETE VAULT
MANHOLE COVER see Detaii A
SAWCUT MANHOLE COVER FRAME PIPING TRENCH
EXISTING EXISTING PAVEMFNT-----,,,
'JUI
PAVEMENT CONCRETE SLAB (if present)
(if present)
0' 6'
PRECAST MATCH LINE DETAIL A
31 V-5
CONCRETE 2� 6- D
fl
VA ET
TRENCH —4 -4—
ItC
MATCH !
I
RE FOR
BORE HOLE
BE TAIL C
jp
GROUI PRI
ELICTI'ACAL CONiROL COMDUIT 42�
tI "FIE.
BELOW GRACE SURFACE CASING
(STEEL OR PVC)
CONIAtNMENr PIPING
SECTION VIEW BEIOW GRADE
E6
BEDROCK SURFACE U i
It
KEY INTO BEDROCK FOR TIGHT SFAC
PLAN VIEW BORE HOLE
BACKFILL SURFACE WATER BEARING ZONE --
I-XISTING SURFACE (MOUNDED 112")
4
WATER LEVEL
EXISTING BASE 1,
M
BACKFiLt,
-I I E-Z
II IF
EXISTING SOILS ---- '�A -
PEA CRAVFL
CONTANMIENT PIPING
(6 -Zl PVC) —ELECTRICAL CONTROL CONDUIT
I ineh PVC)
R 0 EC VERED WATER PIPING
(2 Inch HOPF)
NOTE� SECTION VIEW
1, GROUND - WATER EXTRACnON WELLS Rel �3 AND RW-4 — ------
WLL USE THE EXISTING PUMP HOUSES FIGURE 3
2, ROAD CROSIANG(S) WLL MEET NCDOT
GUIDELINES AND PERMIT CONDITIONS TYPICAL CONSTRUCTION DETAILS
Former Unocal Mallard Creek Polymers Plant
Charlotte, North Carolina
-------- --
" 'VINE*FRICKE Pro'ect No. 3852.9,,, Lr-
ENGINEERS, HYDROCEMCCCTS& APPLIED SOENTIIITS
MALLARn\3852D FR.2

Plant Site
Existing Slope —
Detail D
4—Inch
Discharge Pipe
Concrete Discharge
Structure
------------------------ ----
Rip—Rap Channel
f. (2' wide x 2' deep) Natural Channel
(Slope 0.05)
---------------- ------
See Detail 100'
Detail E
Concrete Structure
(With Headwall, Bottom, and 2 Sides
Open on Downstream End)
Ground
Surface Rip —Rap Lined Channel
FIGURE 4
TREATED GROUND WATER
DISCHARGE POINT DETAILS
Former Unocal Mallard Creek Polymers Plant
Charlotte, North Carolina
Prc;ject No. 3852,96 LEVIN&FRICKE
EN„ SNEERS. HYOROGEOLOG4STS, & APPLIED SCIENTSTS
MALL.ARD\3852DTLD

Treatment Systern
Building Outline
SC­1 to SC-4 AS
FQI-1 to FQI-4
SC- 5 zz LAH --
LSH 0-
USL
F— T I T­ 2 PP-- 2 D I TO NPDES
LSD OUTFALL
ESL
5
f­ p pp-1 SC— 7
1z I PI-5
X�GAC-1 G, A C - 2
LA S
H
__0 SL
FQI
pp
BF---1 BF-2
—6-T
I) CN pl-1 �D 1 pl 3 SCI — 6 See Figure 6
rc Cr (Y" Of CONTROL J,
GROUND —WATER BOX
RECOVERY
PUMPS /A LEGEND
RW- I RW-2 RW- 3 RW-4 Influent Effluent
COMPOUND ug/L ug/L. ug/L ug/L Ug/L ug/L H SAMPLE POR F LAH LEVEL ALARM HIGH
Trichloroethene 201 32 1 ND 87 ND FLOW METER LSH LEVEL SWITCH HiGH
Perchloroethene 210 39 8 ND 93 ND DISCHARGE VALVE LSL LEVEL SWITCH LOW
1,1 --Dichloroethene 85 160 ND 2 66 ND TRANSFER PUMP
1,1 --Dichloroethane 1,200 136 5 3 509 ND C)l BAG, FILTER
1,2-1);chloroethone 1 ND ND ND O.4- ND
1 , 1 , 1 --Trichloroethone 910 30 7 ND 371 ND P PRESSURE GAUGE
Vinyl Chloride 17 10 ND ND 9 9 r CHECK VALVE
Methylene Chloride 12 ND ND ND 5 5 �X, FLOW ADJUSTMENT VALVE FIGURE 5
Benzene 30 2 ND ND 12 ND PROCESS FLOW DIAGRAM
Total T,E,X 118 ND ND 2 48 ND Former Unocal Mallard Creek Polymers Plant
1,2-Dichloroethene 5 2 ND 1 3 ND Charlotte, North Carolina
Chloroform 1 ND ND 1 1 ND
- ---------
ND -- No Detectable Concer) trot io ris
Prc:Ject No, 3852,96 LEVINE*FRICKE
Total I`,E,X -- Total concentratlon of Toluene, Ethylbenzene, and Xylenes ENCINEERS, HYDROCEOLOUSIS, & APPOED SCIENTISTS
-- -- ----- - ----- ------ - - ---- ---- --
MALLARD\3852PM4

WIDTH = 4' -- "
HEIGHT = 8'— 8"
LENGTH �7'-2" 1
WEIGHTS
EMPTY" WEIGHT = 3,—6�
FEE . WEIGHT -= 1 1 ,150
_I
--'. - WASH T
_ _ _. _ _. OUTLET
ELEL{" ?
iA
SERVICE INLET
{
j
k `?_'" Et2VICE OUTLET
— ELEI%. 1 C71 2 :
2'" PACKWASH INLET
l
1 EL.E --a„
Nozzles & Monways may not be Shown in TrUe Orientation.
TGond
rawing remains property
CO Industrial Services Standard LD 36 FIGURE
may N T be capled�+pt�++C� wholly ar partly shown Dual G.N.G. Lead/Lag System
Industrial � � ' d partieswithout Pnor
written c aSer i s Nut t Scale Desi n and Sub ct to Chan without Notice.'�`"�`"` """`�.�i��"�'"""'»� Industrial Services Crain Specifications�
N \ 1995\ 139\APA - ! t