HomeMy WebLinkAboutPIP 89-08; Carltas Development; Planned Industrial Permit (PIP) (14)AP?Z:?J31!! 111.1.
SJAE # CAUKWNIA4FAllM AND WELFARE FNCY A
"
GtUtGE MUWUIAN. Go-
""DEPARTMENT OF HEALTH SERVICES
714/744 P STWET
SAWNTO. CA 9S814
(7.. September 23, 1957
':
Mr. Greg Fischer Unisys Corporation Suite 1100 7677 Oakport Street Oakland, CA 94621
In Reply " Refer To: CAD047784871 Burroughs Corporation Carl sbad P1 ant
Dear Mr. Fi scher:
The California Department of Health Services (DHS) and the Region 9 Office of the U.S. Environmental Protection Agency (EPA) have reviewed the Closure Plan dated June 15, 1987 for the closure of the hazardous waste management units at the Burroughs (Uni sys). Carl sbad P1 ant located at 5600 Avenida Encinas, Carlsbad, San Diego County, California. The units consist of two decommissioned surface impoundments, a wastewater treatment system and related equipment.
Pursuant to Title 22 of the California Administrative Code Section 67212 and the regulations adopted pursuant to the Resource Conservation and Recovery Act, 42 USC Sect ion 6901, et seq., your Closure P1 an is determined to be acceptable with the modifications made by DHS and EPA and is hereby approved.
specific steps of this approved Closure Plan. Please note that upon completion of closure, you and a California registered professional engineer must certify that closure was conducted in accordance with the approved plan. Copies of the certifications must be submitted to DHS and €PA.
(. .
..- A copy of the modifications is enclosed. You are required to comply with the
Should you have questions regarding this approval, you may contact Stephen Baxter of the DHS Regional Office in Los Angeles at (213) 620-2380 or Michael Fernandez in the EPA Regional Office in San Francisco at (415) 974-7475.
Si ncerel y ,
Deputy Director Toxic Substances Control Division CA Department of Health Services
Acting Division Director Toxic and Waste Management Division U.S. Environmental Protection Agency
i. CDW:JZ:SB:sb c"
Enclosures
cc: See next page
Department of Health Services
107 South Broadway, Room 7011
Los Angeles, CA 90012
ATTN: Stephen Baxter
REF: BURROUGHS (UNISYS) CORPORATION CLOSURE PLAN
CARLSBAD, CALIFORNIA CAD047784871
CLOSURE PLAN CERTIFICATION
All specific tasks of the approved Burroughs (UNISYS) Closure Plan have
been completed. Mr. James D. Hartley (a California Registered Professional
Engineer employed by Woodward-Clyde Consultants) has completed a certification
process verifying that the closure was conducted in accordance with the ap-
proved plan. (Please reference the attached certification report.)
A survey plat that shows the locations of the former surface impoundments
at the facility that was prepared by Nolte C Associates, a professional
Surveyor firm has been filed with the City of Carlsbad Planning Department.
Confirmation of this filing by the City of Carlsbad is attached.
This completes all tasks required to achieve clean closure of the Burroughs
(UNISYS) Carlsbad site. If you have any questions or comments, please call
me at (619) 451-4968. Thank you for your help and cooperation.
Sincerely, 2dL"- Thomas P. Gordon
Manager, Energy and Environment"
TPG / gh
'.I , UNISYS
U.S. Environmental Protection Agency
Toxics IS Waste Management Division
215 Fremont Street
San Francisco, CA 94105
ATTN: Mr. Michael Fernandez
REF: BURROUGHS (UNISYS) CORPORATION CLOSURE PLAN
CARLSBAD, CALIFORNIA CAD047784871
CLOSURE PLAN CERTIFICATION
All specific tasks of the approved Burroughs (UNISYS) Closure Plan have
been completed. Mr. James D. Hartley (a California Registered Professional
Engineer employed by Woodward-Clyde Consultants) has completed a certification
process verifying that the closure.was conducted in accordance with the ap-
proved plan. (Please reference the attached certification report.)
A survey plat that shows the locations of the former surface impoundments
at the facility that was prepared by Nolte & Associates, a professional
Surveyor firm has been filed with the City of Carlsbad Planning Departmerli.
Confirmation of this filing by the City of Carlsbad is attached.
This completes all tasks required to achieve clean closure of the Burroughs
(UNISYS) Carlsbad site. If you have any ,questions or comments, please call
me at (619) 451-4968. Thank you for your help and cooperation.
Sincerely,
Thomas P. Gordon
Manager, Energy and Envi'ronment- -
TPG/gh
a. ‘I t
July 19, 1988
”
Mr. Steven Baxter
Toxic Substance Control Division California Department of Health Services
107 South Broadway, Room 7011 Los Angeles, CA 90012
Mr. Michael Fernandez
U.S. EPA
215 Fremont Street San Francisco, CA 94105
Gentlemen:
This letter is to certify that closure of our Carldbad facility was completed in accordance with the approved Closure Plan . submitted to your office on June 15, 1987, and as modified on November 30, 1987.
If you have any questions or need further information, please
contact me at (714) 380-5532.
Sincerely, n
GregorpT. Fischer
Corporate Manager of Environment 8~ Energy
GTF : mg
, ,.
. ..
P -.
2075 US PALMAS DRIVE CARLSBAD, CA 92009-4859
c ..
TELEPHONE
(619) 438-1 161
aitg of @Irlsbnb
PLANNING DEPARTMENT "
July 5, 1988
Tom Gordon Unisys Corporation
10850 Via Frontera San Diego, CA 92127
SUBJECT: CONFIRMATION OF FILING/SURVEY PLAT OF
SURFACE IHF?ROVE"
Dear Mr. Gordon:
This is to confirm that the Planning Department of the City of Carlsbad has received and filed the survey plat identifying the location of surface impoundment areas at the
Carlsbad facility of Unisys Corporation.
Sincerely,
CITY OF CARLSBAD \
MICHAEL J. HOLZMILLER
Planning Director
arb
'F
I ' ,' 7 x 1550 Hole) Circle North
San Diego, Californla 92108
Fax: (619) 293-7920
619-294-9400
( -.. I '.
July 21, 1988 Project No. 87533 1 1K-CERT
-~
Woodward=Clyde Consultants
Unisys Corporation 10850 Via Frontera San Diego, California 92127
Attention: Mr. Thomas P. Gordon
REPORT OF PROFESSIONAL SERVICES
UNISYS (BURROUGHS) FACILITY CARLSBAD, CALIFORNIA
CLOSURE CERTIFICATION - PHASE II
Gentlemen:
Woodward-Clyde Consultants (WCC) is pleased to offer this final report of closure certification of the Unisys facility, located at 5600 Avenida Encina in Carlsbad, California. This report presents work performed.in accordance with our Proposal No. 875331 lP, dated March 29,1988, and our Addendum, dated May 6,1988 as authorized respectively by Unisys Corporation, Release Nos. 51292 and 45567 of Blanket P.O. No. 116164, dated March 30, 1988.
BACKGROUND
On May 13, 1988, WCC provided Unisys with a letter report entitled "Report of Professional Services, Closure Certification, Phase I, Unisys (Burroughs) Facility, Carlsbad, California," which summarized our preliminary findings regarding closure requirement compliance. Our May 13, 1988 report concluded that the closure requirements had been satisfactorily met for all but five of the items in the closure plan and recommended that additional activities be performed to document compliance of these five items. This report is intended to summarize the subsequent closure activities and verify closure of this facility.
SUMMARY OF SUBSEQUENT CLOSURE ACTIVITY
1. Documentation of Liauid Removal
During our site visit of June 22, 1988, the floor sumps were observed beneath the former etching facility and found to be free of residual liquid.
2. Manifests for Soil Treatment Tanks
WCC requested and was provided manifest documentation (Uniform Hazardous Waste Manifest No. 87986607) that tanks T-3, T-4, T-5 and T-8 were disposed of at a Class 1 facility, as stipulated in the closure plan.
.:, IO r 1 , woc-mrd=clydeconsuttants
Unisys Corporation Project No. 875331 1K-CERT .~ *. July 21, 1988
L.. ' Page 2 i
3. Documentation of Waste Treatment Svstem Cleanup Level AcceDtance
We have been provided with a copy of a letter, dated June 17, 1988, from the State Department of Health Services (SDOHS) which addresses sump closures. In this letter, it is stated that the STLC and TIZC hazardous waste criteria established in California Code of Regulations, Title 22 and Code of Federal Regulations Section 40, Part 261 are acceptable cleanup levels for the sumps at the Unisys facility, if it can be certified that the sumps and surrounding soils were adequately sampled and analyzed and the criteria were met. Based on the acceptance of the STLC-C cleanup criteria, the following reports present the results of sampling and analysis of the sumps and surrounding soils, and that the cleanup criteria were met.
"
0 Woodward-Clyde Consultants, ' "Results of Sampling and Analyses
Program Conducted at Burroughs, Carlsbad, California," February 6, 1987.
b Woodward-Clyde Consultants, "Report of Environmental Services, Unisys - Carlsbad, 5600 Avenida Encina, Carlsbad, California," September 8, 1987.
0 International Technology Corporation, "Sump Integrity Investigation,
Burroughs Corporation;Carlsbad, California," September 11, 1986,
The June 17,1988 SDOHS letter further stipulates that a visual inspection of the sumps be conducted to verify their integrity. The site was revisited on July 8, 1988 and, the sumps and connecting channels were visually inspected and the following observations made:
Plating ShoD - The 40-foot collector trench leading to the 4-foot deep sump (S-2) located in the floor of the former plating shop (S-2) was inspected and minor scaling and erosion was observed. While parts of the concrete have been deteriorated, the physical integrity of the
concrete did not appear to be breached.
Western Outside Area - Four individual steel tanks, designated S-3, S-4, S-5, and S-6 were formerly contained in a single six foot deep sump located outside the former plating shop. At the time of our site visit, this sump area was observed to be covered by concrete. According to Unisys personnel the tanks were disposed of and the sump has been filled
with sand and a 4-inch concrete cap.
Wastewater Treatment Area - All but one of the chambers in sump S-1, located in the former wastewater treatment area, were observed to be undeteriorated and no residual contamination was observed. Some localized corrosion was observed at the base of sump S-1, specifically in the chamber beneath the area where tanks T- 1 and T-2 were formerly hated. It is not known whether the observed corrosion in sump S-1 resulted in leakage at this location. Some cancrete patching was observed at the base of the chamber wall. No residual contamination was observed in this chamber of sump S-1.
The sides of Sump S-8, a 5-foot deep concrete sump, located at the west end of the waste water treatment area, appeared to be free of residual contamination. A thin layer of medium grained sand obscured the bottom of the sump. The sidewall concrete showed some
c .,. r * I Unisys Corporation Project No. 87533 11K-CERT
. '7 July 21, 1988
I. Page 3 \.-
evidence of erosion at levels corresponding to previous static liquid levels, but the physical integrity of the sump did not appear breached.
4. bcceutance of Soil Dismsal Plaq -
In accordance with the SDOHS acceptance of the closure plan (subject to the modifications stipulated in their September 23, 1987 letter), the treated soil excavated from the surface impoundments has been removed from the site under Hazardous Waste Manifest (Nos. 87581706-87581716 and 8758 1721) and disposal of at I.T. Corporation's Imperial Valley site.
5. Statistical Evaluation of Couper Concentratioq
The statistical analysis for copper concentrations in the north pond area was revised by Unisys on April 29, 1988 using a Poisson (Square root) data transformation. The transformed data were used to estimate the upper limit of an 80% Student's-t confidence interval and the confidence interval was compared to the regulatory threshold of 100 mag. Based on the results of the revised statistical analysis, we concur that the copper concentration regulatory threshold has been met for the soil remaining beneath the north pond area.
CONCLUSION
We have reviewed the documents cited in this and our May 13, 1988 report and have visited the Unisys (Burroughs) facility on April 21, June 22 and July 7, 1988. Based on our site visits and our understanding of the information in documents prepared by others, and pending acceptance by the State Department of Health Services of the information provided in our closure reports, this facility has been closed in accordance with the requirements set forth in the Closure Plan (dated June 15, 1987) and Modification to the Closure Plan (dated November 30,1987).
It is our pleasure to be of service to Unisys on this project. If you have any questions, please do not hesitate to call.
very mly yours,
WOODWARD-CLYDE CONSULTANTS
Keith "."A-* A. Jones
Project Manager U
,q Certified by:
R.E. 38220
a/kaj6
J* L
July 19, 1988
Mr. Steven Baxter Toxic Substance Control Division California Department of Health Services
107 South Broadway, Room 7011 Los Angeles, CA 90012
Mr. Michael Fernandez
U.S. EPA
215 Fremont Street San Francisco, CA 94105
Gentlemen:
This letter is to certify that closure of our Carlsbad facility was completed in accordance with the approved Closure Plan
submitted to your office on June 15, 1987, and as modified on November 30, 1987.
If you have any questions or need further information, please contact me at (714) 380-5532.
Sincerely, J%-gs! Grenor T. Fischer
Corporate Manager of Environment Energy "
! y. .:. .I UNISYS
June 15, 1987
hsyz mcratlon
Swte i
7677 Oqkporl Street
Oakland CA 94621
TeleChone
41 5 568 2240
"
Mr. Jose Kou, Program Supervisor Facility Permitting Unit Toxic Substance Control Division
Department of Health Services 107 South Broadway, Room 7011 Los Angela, California 90012
Dear Mr. Kou:
RE: Closure Plan for Unisys (Burroughs), Carlsbad Plant
( CAD 04778487 1 1
The enclosed Closure Plan is resubmitted in response to your letter of April 22, 1987, for our Carlsbad manufacturing facility.
The plan covers the deficiency areas identified by your office and provides the information requested to bring the plan into compliance with the State and Federal requirements.
We would appreciate your review and approval of the plan. If you have any
questions or need further information, please contact me.at (415) 568-2240 , .,- " . ,,'. ,._- w-,waw.Jqg .Gmdon .at,Lb1:92,;4514968.. r%-- r*tt... .*-. '4'7 ? '* ' , .- -. . ... . - .. . .- .. '. .
T Csrdc! u5.>-49 ;. Sincerely,
Ref: Burroughs (Unisys ) Corporation Closure Plan
Carlsbad, California CAD047784871
UNISYS-CARLSBAD CLOSUKE PLAN M0L)IFICATIONS MEETING - 2/8/88
Attendees: Stephen Baxter Department of Health Services Micnael Fernandez Environmental Protection Agency Gregory Fiscner Unisys Corporation Thomas Gordon Unlsys Corporation
Paul Deneka Unisys Corporation
On FebrUdry 8, ,1988 a rneeri.ng was neld at tne California
UepartInent of Health Services, Toxic Substances Control Division, 107 Soutn Broadway, Hoom 7011, Los Angeles, California. The
purpose of the meeting was to discuss issues related to the Modifications To Unisys-Carlsbad Closure Plan whicn had been
submrtted November 30, 1987. The following items were agreed upon at that meeting:
I. Statistical Analyses for Determination of Clean Closure
A.
B.
c.
D.
E.
Existing slte constituent levels present no significant risk
to PUDlic nealtn or the environment.
Test data obtalned from Department of Parks and Recreation (DPR) property adjacent to the Carlsbad site
snould be utllized as tne most appropriate background levels.
Tne site soil cleanup level for cyanlde was cnanged from background to 1.0 ng/kg
The three groundwater monitoring wells (MN-A, MW-0 and Mw-2)
which surround the former surface impoundment area snould be retested for all constituents to ensure current data.
Additional statisrical analyses are required to demonstrate
clean closure of the former surface impoundment areas.
1. The statistical analyses should include only test data from rne former surface impoundment areas. Test data from
other slte locations snould not be utilized.
2. Statistical analyses should be performed separately OKI the east pond test data, west pond test data, and total north pond area test data.
” 3. Statistical analyses snould be performed wnicn compare the
surface ilnpoundment constltuent concentrations to both background levels and site cleanup levels.
4. The copper value for soil sample SB-12-3A snould De excluded since 1~ represents an anomalous value (greater than three standard devlations from tne mean) compared to tne otner test results.
11. Disposal of Soil Excavated from tne Nortn Pond Area
It was agreed trlat disposal of non-hazardous soils at a Class I
ndzardous waste disposal facility would be an expensrve and
inappropriate waste of limited resources. Tne DliS rlad previously
determined the excavated soil was not a hazardous waste, but that ilnal classification was dependent upon delisting of any RCRA- llsted wastes by tne EPA. Mr. Fernandez agreed to review the Soil data to determlne if any siynlficant levels of RCRA
regulated constituents exist. If tne EPA determines that tne
Sol1 is not a RCRA regulated waste, then tne DHS can classifiy
tne soil as non-nazardous and the soil will be disposed of at an approved Class 111 landfill.
111. Solvent Groundwacer Contamination
It was agreed that the solvent groundwater concamination was the result of a product spill and was in no way associated With the
ISL) portlon of tne facilty. Groundwater cleanup actrvities which
are being coordinated through tne San Dieqo Regional Water
Quality Control Board (HwQCB) are acceptable.
IV. Facility Deed of Sale
kmen the Unisys-Carlsbad facility is sold, tne property deed will require alterations wnich,indicate tnat tne former surface
impoundments nave been closed by tne State and that copper levels
above background remain at the site.
Please contact me at (6i9) 451-4968 concerning my questions, inaccuracies or omissions.
I . Sincerely,
Myr. Energy c Environmeht
Appendlx III.3.C
STATISTICAL ANALYSIS OF TEST RESULTS FOR WE UNISYS-CAKLSBAD SURFACE IMPOUNDHENTS
Prepared for the
CALIFORNIA DEPARTMENT OF HEALTH SERVICES and
U.S. ENVIRONMENTAL PROTECTION AGENCY
Unisys Corporation
February 9, 1988
P 0
TABLE OF CONTENTS
I. INTRODUCTION
I1 SURFACE IMPOUNDMENT SAiVIPLING PLAN -
111. SAMPLING, QUALITY CONTROL AND ANALYTICAL PROCEDURES
IV- STATISTiCAL AIJALYSES
V. SITE SPECIFIC CONDITLUNS
VI CONCLUSIONS
I . INTRODUCTION
on November 311, 1988 Unisys Corpordtion submitted modifications to the Environmental Closure Plan for its Carlsbad facility located at 5600 Avenlda Encinas, Carlsbad, California. The
modifications included an Analysis of Environmental Test Results for the Unisys-Carlsbad Facility (Appendix III.3.A) wnicn
analyzed all site test data to determine if final site cleanup * levels had been achieved.
On February 8, 1988 Unisys met with the DHS and EPA to discuss
alternative statistical methodologies wnich could be utilized to ensure tnat clean closure of tne former surface lmpoundments had
been achieved. The following statistical methodologies were agreed upon at tndt meeting:
1. The statistical analyses should include only test data from
the former surface impoundment areas. Test data from other Site locations will not be included.
2. Statistical analyses should be preformed separately on the east pond test data, west pond test data, and total pond area test data.
3. Tne 518 ppnl copper value in tne west pond test data snould
be excluded since it represents an anomalous value compared to otner test results (greater tnan tnree standard
deviations from tne mean).
4. The test data obtained from tne Department of Parks and
Recreation (DPH) property should be utilized as tne most appropriate background data.
5. The site cleanup level for cyanide was cnanged from background to 1.0 ppm.
11. SURFACE IMPOUNDMENT SAMPLING PLAN
A. Objective
The objective of the Unisys-Carlsbad surface impoundment sampling
plan was to establish existing pond constituent concentratlons and determine it previously implemented cleanup activities &lad .
achieved final cleanup levels.
J3. Background Constituent Concentraciorls
Four soil samples, obtained from 2 uncontaminated locations on
DPR property adjacent to the Carlsbad site, were utilized to determine naturally occurring background constituent levels. No waste mandgement or chemical nandling activities nad occurred at these locations and the samples represented the same soil series as the Site soil samples. Tne background soil samples were obtained at depths of three and six feet.
C. Surface Impoundment Constituent Testing
1. Surface Impoundment 'Sampling Criteria
The former east and west noldlng ponds were closed during 1983. Heavy earth-moving equipment was utilized to demolish tne birnls, recompacc tne soils and level tne entire north pound area to
grade. During 1986, selected areas of witn nigh copper concentrations were excavated. Tne excavated areas were
backfilled and the entire north pond area was again recompacted
and leveled to grade. Tne demolition of tne.former holding
ponds, excavation of trle contaminated soils and twice leveling to grade of the entire north pond area provided a pnysical mixing
and composlting of the soils. This pnysical mixing of the north Pond area nad tne effect of randomizing tne soil constituents such that tne probability of selection of any particular soil salnple is approximately the same, regardless of tne sample
location. Since location of the samples within tne north pond area does not effect the cnance selection of any particular soil
segment, tne sampling locations which were utilized (Figure 3 Of tne Closure Plan) provide the same results as randomly selected sampling locations .
2. Saturated Zone Sampling
In concurrence witn the DHS, it was determined tnat tne most
effective method for sampling the saturated zone was to test the grourldwater in tne area of the former surkace impoundments. A
groundwater monitoring well (MW-2) was installed adjacent to, and downgradlent from, tne area of the former holdiny ponds in order
to obtain a representative groundwater sample.
III. SITE SAMPLING, UuALrrY CONTROL AND ANALYTICAL PROCEDURES
In August 1987, Woodward-Clyde Consultants was nired to provide environmental Soil and yroundwater testing at tne Unisys Carlsbad site. On August 4 through 20, 1987, 20 soil borings and 3 groundwater monitorlrlg wells were Installed; A total of 60 soil
samples were obtained from the soil and monitoring well isorinys.”
at deptns of 1 to 9 feet. Groundwater samples were obtained from each of the 3 installed monitoring wells.
Sol1 and water samples for iaboratory analyses were collected and
placed into laboratory supplied jars, sealed, labeled, and placed
into an ice cooler. The samples were transported to Analytical
Tecnnologies, Inc. of San Diego (a State certified lab) under chain-of-custody procedures for analyses utilizing EPA approved
metnodologies.
Detailed documentation of soil sampling tecnniques, quality
assurance/quallty control, and analytical procedures are provided
in the attacned Woodward-Clyde Consultants: REPORT OF
ENVIRONMENTAL SERVICESf UNISYS-CARLSBAD (Attachment #l) and Analytical Tecnnoloyies, Inc.: STATEMENT OF QUALIFICATIONS AND
STANDARD OPERATING PROCEDURES (Attachment #2).
All soil and groundwater samples were analyzed for pH, copper, lead, nickel, zinc, chromium, and cyanide. In addition, the groundwater samples and soil samples from the monitoring wells
were analyzed for purgeable halocarbons. A summary of all hoodward-Clyde Consultant analytical test results is provided in Table I.
!
V. UNISYS CARLSBAD SITE SPECIFIC CONDITIWNS
A. Location
The Unisys Carlsbad site is located at 5600 Avenida Encinas,
Carlsbad, California, approximately one-quaEter mile east of the Pacific Ocean. The site is bordered on tne east by Interstate 2
and on the west by the Santa Fe Rallroad and vacant land owned by the State Department of Parks and Recreation. The site is
bordered on the north and soutn by commercial developments. This area is zoned for "Planned Manufacturlny" and the landOs location
and hiyh cost indicate tnat future uses will continue to be for cormaercial/industrial applications.
B. Soils
SO11 borirlg data derived from tne installation of nine monitoring
wells and over tnlrty soil borings at the Unisys Carlsbad Site lndicate that tne sol1 consists primarily of sandy-clays. The pH
of the background soil samples ranges from 6.6 to 9.0 with an averaye p~ of approximately 7.5 .
In January 1987,. IT' Corporation obtained a composite sample of
tile contaminated soil wnich was excavated from the area of tne
tormer wastewater holding .ponds. This sol1 represented the most contaminated section of the north pond area and contained copper
levels more tnan double the now existing copper concentrations. A California waste assessment bioassay was performed on the
composite soil sample by Brown and Caldwell Analytlcal Services Divislon (a State certified lab). Results of the bioassay
indicate that there was absolutely no observable effect at any Of tne tested concentrations.
During September 1987, anotner composite sample was obtained from
the excavated soil and tne copper and bioassay tests were repeated by BTC Laboratories, Inc.(a State certified lab). The
test results were identical to those performed by IT Corporation. soil test documentation 1s presented rn Appendix 111.3.8 of tne Modified Unisys Carlsbad Closure Plan.
C. Surface Water
A small rainwater run-off creek flows In a northerly direction
along the western edge of the Unisys Carlsbad site and surface water from a storm drain, system flows alony tne nortrlcrn edge of
the property. Botn of these surface water systems flow into a
SInall pond (Cannon Lake) located nortnwest of the Unisys property. This pond then empties, vla an underground Storm drain, to tne western end of Aqua Hedionda Lagoon. Tnis end of
the lagoon is a saltwater area whicn outlets to tne Pacific Ocean.
The Cannon Lake water and bottom sedilnerlt were sampled DY IT
Corporation during September 1986. , Results from the water
analysis indicate tnat all metal constituent levels except zinc
(0.02 ppm) were below detection limits. Tne lake water was Slightly alkaline with a pH of 8.9. Results from the lake bottom
sediment analysis indicate that all metals constituent levels are below naturally occurring background levels (reference Attacnment
t3).
" There is no available information which would indicate tnat past
or existing constituent levels at the Unisys Carlsbad site
adversely effect surface water systems in this area.
D. Groundwater
"ne groundwater west of Interstate 5 (including and surroundlng
the Unisys Carlsbad site) nas been designated as a non-beneficial use area by the San Diego Regional Water Quality Control Board.
"The Comprehensive Nater Quality Control Plan Report, San Dieyo
Basin" designates no exlstiny or potential beneficial uses for
groundwater In this sector "due to lack of present and potential
Use, and tne existence of naturally poor groundwater quality with
little potential for improvement". EPA guidelines for groundwater classification categorize the groundwater as "Class
111 - Groundwater not a source of drinklng water". Tne nigh
levels of nitrate (211 ppm). and total dissolved solids (1700 ppm)
naturally occurring in tne groundwater make it unfit for drinking water usage. Tnere are no known groundwater wells near the Unisys Carlsbad site.
Tile groundwater aquifer below the site begins at a depth of
approximately 12 feet from the surface. Groundwater elevation measurements indicate that tne groundwater flows in a southwest
direction arid eventually discuarges to the Pacific Ocean. Data derived from a 24-hOUr pump test,indicate that the aquifer is semi-confined (storage coefficient = 0.015) and that movement Of Water below the site 1s very slow. The average pH of the water
in tne monitoring wells is approximately 7.5. There is no
evidence indicating that the groundwater aquifer influences any surface water system.
P n
VI . CONCLUSI~NS
Statistical analyses of the Unisys-Carlsbad surface impoundment
test data indicate that the remaining constituent levels for lead, zinc, chromium and cyanide are not slynificantly different
from naturally occurring background levels. .The average levels for each of these constituents is less tnan one-tnird average
background levels for the western united States and less than one-eignth State DHS criteria for identifying hazardous
materials. No cleanup actlon is required for lead, zinc, cnromiu~n or cyanlde.
The statistical analyses indicate that remaining nickel concentrations for the east pond and north pond areas are not slgI1ifiCantly different from naturally Occurring background levels. Nickel concentrations at tne west pond are sligntly above Site background levels, altllough tne difference is less tnan one standard deviation. The average remaining west pond nickel level of 7.6 ppm is less than one-half average background
levels for tne western United States (16 ppm) . Tne DHS in their "Criteria for Identification of Hazardous and Extremely Hazardous
Wastes" (p.99) states "Tne mean soil levels are considered to be acceptabie, in mat no substantial toxicological lmpact on
organisms occurs when tne listed substances appear at these natural averaye levels (Dep.artment of Environment (DOE) 1980)". The remaining nickel levels are less tnan four percent of the State DHS criterla for identifying hazardous materials. No
cleanup action is requlred for nickel.
The statistical analyses indicate that tne average pH of tne
north pond area soil 1s slightly lower tnan backyround levels, altnougn the soil remains very close to neutral with an average
pH of 5.8. Groundwater samples obtained from 9 monitoring wells On and around the Carlsbad site have an average pH of 7.4. Cannon
Lake water and sediment samples nave an average pH of 8.3. This indicates tnat the slightly lowered soil pH is not significantly
effecting ground or surface waters. No cleanup action is required for pIi.
Tne statistical analyses indicate that remaining copper concentrations at tne east pond, west pond and combined north pond area are not significantly different from the final site
cleanup level of 100 ppm. NO furtner cleanup action is required for copper.
Statistical analyses of the Unisys-Carlsbad surface impoundment
test results, combined with empirical data from areas surrounding tne site, indicate tnat the remaining constituent concentrations
meet appropriate final site cleanup levels and pose no risk to fwman health or the environment.
No further cleanup actions are required.
i '. 1
AUTHORIZED SIGNATURE
This statistical analysis (Appendix III.3.C) has been prepared
under my direct supervision and I agree with its contents. I am an autnorized designee of Unisys Corporation.
CorGorate Manager of Environment and Energy
Prepared by Thomas P. Gordon
”
IV. STATISTICAL ANALYSES
1 A. Comparison to Background Levels
..
A Statistical analysis utilizing tne Studentized-T test was
performed in order to determine if there was a significant difference between naturally occurring constituent levels and remaining north pond area constituent levels.
The analytical model assigns a sample value of zero for all
sample analyses where the constituent was non-detectable. A sample value of one-half tne detectlon li~nlt was assigned for all
trace sample analyses. For each set of background and surface impoundment test data, the following statistical parameters are calculated:
S = Standard Deviation = - (ZXIYN
tN - 1)
TC = Limit of Probable Error
Found in T test table of 95% probabilities.
Two-tailed T test is utilized for parameters with both high and low limits (PHI.
One-tailed T test is utilized for parameters witn a single nigh limit (all constituents except pH).
In order to determine if there is a significant difference
between the background and site constituent levels, tfle T statistic for comparing two means was utilized.
T=
S,L= deignted Standard Deviation = S, +& LZ
If tne T statistic is greater than the limit of probable error
(T> TCla) then tnere is a statistical indication that tne site .
constituent levels are higner than background levels.
r' _-
' I I, , .I
B. Comparison to Final Cleanup Levels
The copper and cyanide constituents have flnal soil cleanup
levels which are higher than background. For these two constituents, statistical analyses were performed in order to
determine if there was a signlficant difference between final cleanup levels and remaininy nortn pond area constituent levels.;
The analytical model assigns a sample value of zero for all sample analyses where tne constituent was non-detectable. A
sample value of one-nalf the detection limit was assigned for all trace sample analyses. For eaan set of background and surface
impoundment test data, the following statistical parameters are calculated:
N = Number of samples
x = Mean = zX/N
sa= Variance
S = Standard
TC = Limit of Found in
Deviation = />XL - (TX)VN v (N - 1)
Probable Error
T test table of 95% probabilities. One-tailed T test is utilized-for parameters with a single nigh limit.
In order to determine if there is a signlficant difference between the final site cleanup and holding pond constituent
levels, the test of hypotheses on a single mean was utilized.
U = Final Cleanup Level - T= X-U
If the T statistic is greater than the limit of probable error (T)TC) tnen there is a statistical indication tnat tne holding pond constituent levels are lligner tnan final cleanup levels.
"""""""""""
AT1 LAB I UOHINti # DEPTH DESCRIPTION """"- """"- ""_ -""""""
708103 03 MW-S-IA 3 DPH LAND SOIL
708103 04 MW-S-2A 6 DPR LAND SOIL 708103 05 MW-T-IA 3 DPR LAND SOIL
708103 06 HW-T-2A 6 DPR LAND SOIL ""-"" "-""" "_" ""_""""
708034 05
708034 06 708034 07
708034 08 708034 09
708034 10 708045 01
708045 02 708045 03
708045 04 708045 05
708045 06 708045 07
708045 08 708045 09
708045
708045 708045
708045 708045
708045 708045
708045 708015
708045 708045
708045 708045
708045 708045
10
11 12
13
14
15 16
17 18
19
20
21 22
23 24
SB-3-1A
SB-3-ZA SB-3-3A
SB-4-1A SB-4-2A
SB-4-3A SB-5-1A SB-5-2A SB-5-3A
SB-6-1A
SB-6-2A
SB-6-3A
SB-7-1A
SB-7-2A SB-7-3A
SB-8-1A
SB-8-2A SB-8-3A
SB-9-1A SB-9-2A
SB- 9-3A
SB-10-1A
SB-10-2A SB-10-3A
SB-11-1A
SB-11-2A
SB-ll-3A SB-12-1A
SB-1.2-2A SB-1.2-3A
SAMPLES (N) MEAN
STD UEV (S)
VAHIANCE (S*2)
TU2 (.05,N-l) (sA2 )/N
1 EAST POND
3 EAST POND 9 EAST POND 1 EAST POND
3 EAST POND
9 EAST POND 1 EAST POND
3 EAST POND
9 EAST POND
3 EAST POND
9 EAST POND
1 EAST POND
3 EAST POND
9 EAST POND
1 . EAST POND
""""""-
SAMPLES (N )
MEAN
STD DEV (S)
VARIANCE (S42)
TC1 (-O5,N-1)
(S42 )/N
1 WEST POND
3 WEST POND
9 HEST POND
1 WEST POND
3 WEST POND
9 WEST POND
1 WEST POND
3 WEST POND
9 WEST POND 1 WEST POND
3 WEST POND 9 WEST POND
1 WEST POND
3 WEST POND
9 NEST POND """"_ """-" ""- "-"--------
SAMPLES (N)
MEAN
STU DEV (S)
VARIANCE (SA2) TCI (.OS,N-l)
tS"2 )/N
~- ~
PH
7.64 8.18 8.99 8.45
4.00
8.32
0.56
0.32
3.183 0.08
5.86
4.40
6.40 5.31
5.19
6.68
6.06 4.06 6.29
4.64
4.05
7.05
6.64
5.95
5.49
15.00
5.60
0.97
0.95
2.145
0.06
"-"""
"-"""
""""-
5.15
4.65
6.65 6.65
4.73
6.07
5.11
6.66
6.20 5.17 5.31 7.30
7.20
7.40
6.79
15.00
6.07 . 0.97
0.93 2.145
0.06
""""-
COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
5.6 50.1 4.0 21.3 10.6 4.5 0.00 36.8 6.7 25.8 12.0 0.00 1.9 36.3 2.4 14.5 8.1 0.00 3.5 27.2 5.5 11. I 7.1 0.26
4.00 4.00 4.00 4.00 4.00 4.00
3.88 37 - 60 4.65 18.18 9.45 0.07 1.57 9.43 1.86 6.62 2.25 0.13
2.47 89-91 3.47 43.82 5.06 0.02 2.353 2.353 2.353 2.353 2.353 2.353
0.62 22.23 0.87 10.96 1.26 0.00
7.8 0.0 4.4 11.1 11.2 0.00
146.0 0.0 7.5 13.8 14.4 0.00
4.3 0.0 0.9 4.8 4.9 0.00 229.0 57.4 9.5 25.5 12.9 0.25
3.0 0.0 5.9 12.3 13.2 0.00 0.0 0.0 3.5 12.7 10.9 0.00
123.0 10.0 10.5 32.2 12.9 0.00 202.0 0.0 7.9 14.5 13.0 0.57 221.0 0.0 5.5 15.6 9.5
55.9
0.00
0.0 3.3 12.1 7.9 1.00
14 9.0 12.0 ' 5.7 14.4 8.8 0.45 29.3 0.0 1.2 9.8 4.8 0.00
124.0 22.2 7.4 22.5 11.1 0.00
116.0 45.6 7.9 21.3 11.1 0.00
5.9 0.0 1.9 10.7 7.2 0.00
15.00 15.00 15.00 15.00 15.00 15.00
94 41 9.81 5.53 15.55 10.25 0.15
84.50 18.26 2.96 7.00 3.00 0.30
7140.16 333.32 8.78 48.97 9.01 0.09
I. 761 1.761 1.761 1.761 I. 761 1.761
476.01 22.22 0.59 3.26 0.60 0.01
54.1 0.0 3.4 14.7 8.0 0.37
185.0 18.6 4.3 16.1 8.3 0. 42
65.1 0.0 5.3 8.4 8.8 0.29
116.0 10.7 9.3 23.5 13.4 0.00
188.0 5.1 10.6 13.6 13.1 0.00
206.0 0.0 7.6 17.0 15.2 0.00 156.0 30.7 7.7 17.3 9.9 0.75 5.2 0.0 2.3 9.6 9.2 0.00
4.7 0.0 8.0 12.8 8.1 0.00
353.0 17.9 8.7 19.3 10.9 0.00
43.8 0.0 9.9 12.0 11.4 0.00
5.5 0.0 1.9 9.1 7.0 0.00
51.3 0.0 9.1 29.7 13.9 0.00 103.0 0.0 9.7 31.7 12.1 0.00 NA 0.0 16.6 16.3 9. 8 0.00
14.00 15.00 15.00 15.00 15.00 15.00
""-"" ""-"" """"- """-" """"- """"-
""-"" -"""" -"""" -"""" """"- "_"""
""""_ """"- "-""" """-" ""-"" """"-
""""_ ""_"" """"_ -"""" "-""-- ---------
109.76 5.53 7.63 16.74 10.66 0.12 #I
99.28 9.60 3.79 6.95 2.41 0.23 9856.50 92.15 14.33 48.28 5.82 0.05
1.771 1.761 1.761 1.761 1.761 1.761
6.14 0. 96 3.12 0.39 0.00 704 04
CAHLSB )TAL POND AREA LEVELS PARTS PEH MILLION (PPM) '. - ,
PH COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
PI13~0I-~IPII1IPIIII11131011pII ATI ut) t nonmti I DEPTH DESCRIPTION "I """"- """"- ""- -"""-""- -"""" """"- """"- -"""" """"- --------- ""-""
708034 05 708034 06
708034 07 708034 OM
708034 09 708034 10
708045 01 708045 02
708045 03 708045 04
708045 05 708045 06
708045 07 708045 08
708045 09 70P045 10
708045 11 708045 12
708045 13 708045 14
708045 15 708045 16
708045 17
708045 19 708045 10 708045 21 708045 22
708045 23 708045 24
70804s 18
SB-3-1A SB-3-ZA
SB-3-3A SB-4-1A
SB-4-2A SB-4-3A
SB-5-1A SB-5-2A
Sa-5-3A SB-b-1A
SB-6-2A Sli-6-3A
SB-7-1A SB-7-2A SB-7-3A SB-8-1A sn- 8-ZA SB-8-3A
St)- 9-1A SB-9-2A
SB- 9-3A SB-lU-1A SB-10-2A SB-10-3A
SB-11-1A SB-11-2A Sli-ll-3A SB-12-1A SB-12-2A SB-12-3A
1 3 9 1 3
9 1 3 9 1 3 9 1 3 9 1
3 9 1
3
9 1 3
9
1 3 9 1 3 9
EAST POND EAST PUNIJ EAST POND
EAST POND
EAST POND
EAST POND EAST POND
EAST POND EAST POND
EAST POND EAST PONL)
EAST POND EAST POND EAST POND WES'I' POND
NEST POND WEST POND
WEST POND WEST POND WEST POND WEST POND WEST POND NEST POND WEST POND WEST POND WEST POND WEST POND
WEST POND WEST POND
ms-r POND
5.86
4.40 6.40 5.31 5.19 6. b8 6.06 4.06 6.29 4.64 4.05 7.05 6.64 5.95 5.49 5. 15 4.65 6.65 6.65 4.73
6.07
5.12
6.20
5.31 7.30 7.20 7.40 6.79
6.66
5.17
7.8 146.0 4.3 229.0 3.0 0.0 123.0 202.0 221.0 55.9 149.0 29.3 124.0 116.0 S. 9
54.1 185.0 65.1 116.0
188.0 206.0
156.0 5.2
4.7
353.0
43. 8 5.5 51.3 103.0 NA
0.0 0.0 0.0
57.4 0.0
0.0 10.0
0.0
0.0
0.0 12.0
0.0 22.2 45.6 0.0
0.0 18.6
0.0 10.7
5.1
0.0 30.7
0.0
0.0 '
17.9
0.0 0.0 0.0 0.0 0.0
4.4 7.5 0.9
9.5 5.9
3.5 10.5
7.9 5.5 3.3 5.7 1.2 7.4 7.9 1.9 3.4 4.3 5.3 9.3 10.6
7.6
7.7 2.3
8.0 8.7
9.9 1.9 9.1 9.7 16.6
11.1 13.8 4.8 25.5 12.3
12.7 32.2 14.5 15.6 12.1 14.4
9.8 22.5 21.3 10.7
14.7 16.1 8.4 23.5
13.6 17.0
17.3
9.6
12.8 19.3
12.0 9.1 29.7 31.7 16.3
11.2 14.4 4.9 12.9 13.2 10.9 12.9 13.0 9.5 7.9 8.8 4.8 11.1 11.1 7.2
8.0 8.3 8.8 13.4 13.1 15.2
9.9 9.2
8.1 10.9
11.4 7.8 13.9 12.1
9.8
0.00
0.00 0.00
0.25 0.00
0.00 0.00
0.57 0.00
0.45 1.00
0.00 0.00
0.00 0.00
0.37 0.42
0.29
0.00 0.00
0.75 0.00
0.00 0.00
0.00 0 -00
0.00 0.00
0.00
0.00
""""- """"- ""- ^"""""" -"""" """"- """"- """"- """"- """"- """"-
SAMPLES (N ) 30.00 29.00 30.00 30.00
STD DEV (S)
MEAN 5.84 101.82 30.00 30.00 30.00 7.67 6. S8 16.15 10.46 0.14 0.98 90.59 14.50 3.51 6.88 2-68 (1.26
VARIANCE (S42) 0.96 8207.26 210.14 12.29 47.31 7.20 0.07 TC1 (-05,N-1) 2.046 1.701 1.699 1.699 1.699 1.6Y9 1.699
( S"2 )/N 0.03 283.01 7.00 0.41 1.58 0.24 0.00
.
BACKGROUND LEVELS DESCKIPTION
PIIPI1IIIIIIIPIPP"IPPIrf "-----"""
SAMPLES (N)
MEAN
Sl'D LIEV (S) VARIANCE (S-2 ) TCZ (-05,N-1)
(S* )/N
EAST POND LEVELS DESCHIPTION
111101111I~1111P1~11"~~~ "-"""""
SAMPLES (N )
MEAN
STD DEV (S)
VARIANCE (S"2) TCI (-05,N-1)
( SA2 ) /N
rti COPPER
4.00 4.00
8.32 3.88 0.56 1.57
0.32 2.47 3.183 2.353
0. 08 0.62
""""- """"-
PH COPPER
15.00 15.00
5.60 94.41
0.97 84.50
0.95 7140.16
0.06 476.01
""""_ """"_
2.145 1.761
LEAD """"_
4.00
37 60
9.43
88. 91
2.353
22.13
NICKEL . 2 INC """"- """"_
4.00 4.00
4.65 18.18
1.86 6.62 3.47 43.82
2.353 2.353 0.87 10.96
LEAD NICKEL """"_ -""""
15.00 15.00 9.81 5.53
18.26 2.96 333.32 8.78
1.761 1.761 21.22 0.59
ZINC ""-""
15.00 15.55
7.00
1.761 48.97
3.26
CHROMIUM
4. 00 9.45
2.25 5.06
2.353 1.26
""""_
CHROMIUM
15.00 10.25 3.00 9.01
1.761 0.60
""""-
PARTS PER MILLION (PPM) .-
CYAN I DE """"-
4.00 0.07
0.13 0.02
2.353 0.00
CYANIDE
15.00 0.15
0.09 0.30
1.761 0.01
-""""
BACKGROUND LEVELS DESCRIPTION pH
III11IIIII~OIIIPPIIIpIIII "--------"- -""""
SAMPLES (N) 4.00 MEAN 8.32 STD DEV (S) 0.56 VAHfANCE (S"2) 0.32
(S"2 )/N 0.08
TC2 (.05,N-1) 3.183
WEST POND LEVELS DESCRIPTION
lOIIPIPlPIIPaIliilEIIPIIl """"""_
SAMPLES (N) MEAN
STD DEV (S) VARIANCE (S"2)
TCl (-05,N-1) (S42 )/N
pH
15.00 6.07
0. Y7 0.93
2.145 0.06
""""-
EAST POND vs BACKGROUND DESCRIPTION pH COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
Il~a1111~11aPIIIIPIPrPIII -"""""" "--"-" ""---" -"""" -"-""- """"- """"- ""-""
WEIGHTED STD DEVIATION S(l,Z) 0.38 21.83 6.67 1.21 3.77 1.37 0.10 OT' STATISTIC 2-MEANS T(112) -7.19 4.15
LIHXT OF PROBAdLE ERROR . TC(lr2) 2.72 SIGNIFICANT DIFFERENCE T(1@2)>TC(l,Z)? Yes Yes no no no no no
-4.17 0.73 -0.70 0.59 0.86 1.76 2.06 , 2.11 2.22 2.16 2.01
COPPER """"-
4.00
3.88
1.57
2.47
2.353
0.62
LEAD NICKEL """"- """"-
4.00 4.00 37.60 4.65 9.43 1.86 88.91 3.47 2.353 2.353
22.23 0.87
2 INC """"-
4.00
10.18 6.62
43.82 2.353
10.96
COPPER LEAD NICKEL """"- "-""" """"_ -
14.00 15.00 15.00 109.76 5.53 7.63 99.28 9.60 3.79 9856.50 92 15 14.33
1.771 1.761 1.761
704.04 6.14 0.96
2 INC .""""
15.00
16.74 6.95
48.28
3.22 1.761
CHROHIUM
4.00
Y. 45 2.25
5.06 2.353 1.26
""""_ CYANIDE """"-
4.00
0.07 0.13
0.02 2.353
0.00
CHROMIUM CYANIDE
15.00 15.00
10.66 0.12 2.41 0. 23
5.82 0.05
1.761 I. 761
0.39 0.00
-"""" """"_
WEST POND VS BACKGROUND DESCRIPTION IJtl COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
~~~~~~=aaa~=aaaa~a~aaan~% ------------- --------- -..--_____ _-_______ --_______ _-_______ ___".____ _________
WEIGHTED STD DEVIATION S(l.2) 0.38 26.55 5.33 1.35 3.76 1.29 0.09 *To STATISTIC 2-MEANS T(1,2) -5.97 3.99 -6.02 2.20 LIMIT OF PROBABLE ERROR TC(1,2)
0.65
SIGNIFICANT DIFFERENCE T(l,2)>TC(1,2)? Yes Ye= no Yes no . no no
-0.38 0. Y4 2.73 1.77 2.12 2.04 2.12 2.21 2.08 "
BACKGROUND LEVELS DESCRIPTION
IaaPaIIa~IIII~IaPaIIIpPpl "-"---""-
SAMPLES (N)
MEAN STD DEV (S)
VARIANCE (S"2)
TC2 (-05,N-1)
(SA;L)/N
PH
4.00
8.32
0.56 0.32 3.18
0.08
"-""" COPPER """-"
4.00
3.88 1.57 2.47 2.35 . 0.62
LEAD NICKEL "-""" ""-""
4.00 4.00 37.60 4.65 9.43 1.86 88.91 3.47
2.35 2.35 22.23 0.87
PH COPPER LEAD NICKEL
30.00 29.00 30. 00 30.00 5.84 101.82 7. b7 6.58 0.98 90.59 14.50 3.51 0.96 8207.26 210.14 12.29 2.05 1.70 1.70 1.70 0.03 283.01 7.00 0.41
""-"" -"""" "-""" """"-
Z INC -""""
4.00 18.18 6.62 43.82
2.35 10 96
CH RON I UM
4.00 9.45
2.25 5.06
2.35 1.26
-""""
ZINC CHHOMXUM -"""" """"_
30.00 30.00 16.15 10.46
6.88 2.68
47.31 7.20
1.70 1.70 1.58 0.24
PARTS PER MILLION (PPM) .
CYANIDE
4.00 0.07
0. 13 0.02
2.35 0.00
"""-"
CYANIDE
30.00 0.14
0.26 0.07 I. 70 0.00
"""-"
PARTS PER MILLION (PPMJ
CLEANUP LEVELS DESCRIPTION PH COPPER LEAD NfCKEL ZINC CHROMIUM CYANIDE
1131=31a1Iaa"P3pIlla~~a= """"""- """"_ """"_ """"_ """"- "-""" """"- ""-"--
CLNOP LEVEL (U) " 100.00 " " " " 1.00
EAST POND LEVELS DESCRIPTION PH COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
SAMPLES (N) 15.00 15.00
STD DEV (S)
0.15 84.50 0.30 VARIANCE (S*2) 7140.1b 0.09
II=IaPII"I=DIPIIPII===== """"""_ """"_ """"_ """"- """"- """"_ """"- ""-""
MEAN 94 41
TC (.05tN-1) 1.761 1.761
EAST POND vs CLEANUP DESCRIPTION w COPPER LEAL) NICKEL ZINC QIROMIUM CYANIDE
pIXIIIIaIPIIIaaaIIIxn=a~= """"""- "-""" "-""" """-" """"_ ""-"" """"- ---------
.To STATISTIC 1-MEAN T -0 26 -11.02
LIMIT OF PROBABLE ERROR TC (-05tN-1) 1.76 1.76
SIGNIFICANT DIFFERENCE T>TC? no no
CLEANUP LEVELS DESCRIPTION PH -COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
" " 1.00 ~~Pax9~oIa~IpI~~paI1lpIII """"""_ """"_ "^""" "-""" -"""" """^" """"- """-"
CLNUP LEVEL (U) " 100.00 " "
WEST POND LEVELS DESCRIPTION pti COPPER LEAD NICKEL ZINC CHROMIUM CYANIDE
SAMPLES (N) 14.00 15.00 MEAN 109.76 0.12
STD DEV (S) 99.28 0.23
VARIANCE (S A2 ) 9856 50 0.05
11~1131~~11111p1p*x"I~~~ _"""""" -"""" """"- "-""" "-""" "------- --------- ---------
TC (e05tN-1) 1.771 1 761
WEST POND VS CLEANUP DESCRIPTION PH COPPER LEAL) NICKEL ZINC CHROMIUM CYANIDE
'To STATISTIC 1-MEAN lr 0.37 -14.82
LIMIT Ut' PROBABLE ERROR 'IT ( .05,N-l) 1.77 1.76
SIGNIFICANT DIFFERENCE T>TC? no no
IaP=IIa==~IIaaP11DPIOllPP """"""_ """"_ """"- """"_ """"_ """"- """"- -""""
CLEANUP LEVELS DESCRIPTION PH COPPER LEAD NICKEL 2 INC
PIIDaPII=aIII=a11~a1P~~~~ """"""- """"_ ""-"" "--""- """-" ---------
CLNUP LEVEL (U) " 100.00 " " "
EAST h WEST POND LEVELS DESCHLPTION PI1 COPPER LEAD NICKEL ZINC
SAMPLES (N) 29.00
MEAN 101.82
' STD DEV (S) 90.59
VARIANCE (SA2) 8207 26 TC (.05,N-1) 1,. 701
p"llI~l~I~~l~lI~llIolpII "_""""" ""-"" --------- --------- --------- ---------
t :k- r,
.?
PARTS PER MILLION (PPM)
CHROMIUM CYANIDE
" 1.00
""""- """"-
MROMZUM CYANIDE
30.00 0.14
0.26 0.07 1.699
""""- """"-
WND AREA vs CLEANUP DESCRIPTION PH COPPER LEAD NICKEL ZINC cxRonIun CYANIDE
IPllltPIPflJPIIII~Ialllll """"-"" _"""" """"_ """"- """"_ """"_ """"- "-"""
*T* STATISTIC 1-MEAN T 0.11 -18.05
SIGNIFICANT DIFFERENCE T)TC? no no LIMIT OF PROBABLE ERROR TC ( .05,N-1) 1.70 1.70