HomeMy WebLinkAbout1989-01-24; City Council; Resolution 89-22.) , e e
J. II RESOLUTION NO. 89-22
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A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD, CALIFORNIA, APPROVING THE SUBMITTAL OF AN APPLICATION TO THE ENCINA ADMINISTRATIVE AGENCY FOR AUTHORIZATION TO DISCHARGE GROUNDWATER CLEANUP FLOW INTO THE ENCINA JOINT SEWER SYSTEM AND AUTHORIZING THE CITY ENGINEER TO ISSUE A PERMIT FOR THAT PURPOSE.
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7 The City Council of the City of Carl sbad does hereby resolve as fo
8 1. That submittal of an application for authorization from the
9 Administrative Agency to discharge groundwater cleanup flow into the Encir
10 Sewer System (Exhibit C} is hereby approved.
11 2. That the City Engineer of the City of Carlsbad is hereby aul
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into the Encina Joint Sewer System pending permit application approval 13
to grant a permit to the Unisys Corporation to discharge groundwater cleal
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Council held on the 24th day of January , 1989 by the foll owing \ 16
PASSED, APPROVED AND ADOPTED at a regular meeting of the Carl st 15
Encina Administrative Agency. 14
l8 I AYES: Council Members Lewis, Kulchin, Pettine, Mamaux and 1
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NOES: None
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ABSENT: None
ATTEST:
dkLu.% dQ- ALETHA L. RAUTENKRANZ. Ci tv C1 erk .. (SEAL)
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.. .. e Exhibit C
APPLICATION FOR PERMIT
TO DISCHARGE GROUNDUATER CLEANCP FLOW
INTO THE ENCINA SANITARY SEWER SYSTEM
1. Application submitted to:
Lloyd B. Hubbs, P.E.
City Engineer
City of Carlsbad
Engineering Department
2075 L.as Palmas Drive
Carlsbad, CA 92009-4859
2a Address of site from which the cleaned up groundwater will b discharged:
Unisys Corporation
5600 Avenida Encinas
Carlsbad, CA 92008
2b Full name and address of the owner of the cleanup site:
Unisys Corporation
Corporate Headquarters
Township Line 8 Union Meeting Road
Blue Bell, Pennsylvania 19424-0001
2c Provide a detailed history of the discovery of the pollutanl and/or contaminants that resulted in the cleanup being required:
During the first quarter of 1986 Unisys (formerly Burroughs)
Corporation decided to relocate its Carlsbad manufacturing
operations and sell the Carlsbad facility. As a part of thc
plant environmental closure activities, three groundwater monitoring wells (MW-A, MW-I and MW-0) were installed and
solvent contamination was detected in monitoring well MW-I.
The Regional Water Quality Control Board was notified of th contamination and three additional monitoring wells (MW-P, MW-Q and MW-R) were installed to determine the location of source and the extent of the groundwater contamination plum
Results from these additional monitoring wells indicated th the contamination source may have been a chemical storage a which was previously located at the south end of the curren
chemical storage building. The area of the groundwater
contamination plume is ver’y localized and fully contained
within several hundred feet of the source.
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In August 1987, a soil gas investigation was performed at the
Unisys-Carlsbad site and adjacent Department of Parks 8
Recreation (DPR) property. The purpose of the soil gas
investigation was to more completely define the groundwater contamination plume and determine if any contamination source
remained in the soil. As a result of the soil gas data, two
additional groundwater monitoring we1 Is (MW-S and MW-T) were
installed on the DPR property. Results from the soil gas
investigation and additional groundwater samples confirmed that the contamination plume is very localized and thal- there is no remaining solvent source in the soil which might
discharge contaminants to the underlying groundwater aquifer. The test results also revealed a small secondary groundwater
contamination plume on the DPR property which is centered in the vicinity of monitoring well MW-T. The DPR was notified o
the contamination plume and a Temporary Use Permit has been obtained to allow installation of extraction well pumps,
controls and piping in order to provide cleanup of this secondary contamination plume.
On May 28, 1987 the RWQCB issued Cleanup and Abatement Order
No. 87-17 which directs Unisys to provide a remedial
groundwater cleanup program. On September 9, 1987 the RWQCB
issued Addendum No. 1 to Order No. 87-17 which sets final
cleanup levels for the affected groundwater aquifer. On
November 18, 1987 the RWQCB issued a letter to Unisys
indicating that the secondary DPR property groundwater Contamination plume is also covered under Cleanup and
Abatement Order No. 87-17 and that cleanup and monitoring of
th'is plume is also required.
Since Cleanup and Abatement Order No. 87-1 7 has been issued,
monitoring wells MW-I, MW-Q and MW-T have been been sampled and analyzed on a quarterly basis and have shown no
significant changes in constituent levels.
2d Approxim'ate quantity, in gallons per day, that is proposed to
be discharged into the Encina Joint System:
The maximum proposed discharge to the Encina Joint System is
86,400 gallons per day.
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2e Whether ithe groundwater has been or may be classified as +ox
or hazardous using the criteria established by regulations o
the EPA, State of California and/or San Diego Regional Water
Quality Control Board:
The groundwater concentrations for several purgeable
halocarbon constituents are currently higher than State act! levels for drinking water. The following table shows the
I existing groundwater constituent levels, RWQCB final cleanup levels and State drinking water action levels:
*Exi st i ng RWQCB State Groundwater Cleanup Drinking Constituents Leve I s Leve I s Leve I s
1,l D i ch I oroetha'ne 38 ug/l 2,o us/ I 20 ug/l 1,l Dichloroethylene 400 ug/l 60 ug/l 6 ug/l 1,1,1 Trichloroethane 400 ug/l 200 ug/l 200 ug/l Methylene Chloride (5 ug/l 40 ug/l 40 ug/l
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* Existing values reported are the highest single sample values obtained from the 1988 third quarter monitoring repor
submitted to the RWQCB. Samples were taken on September
23/25, 1988 by Woodward-Clyde Consultants and analyzed by
Analytical Technologies, Inc. No other volatile organic
constituents were detected utilizing EPA methods 601 or 624.
The treai-ed groundwater which will be dicharged to the Encin
Joint System will have purgeable halocarbon concentrations below State action levels for drinking water (reference section 2h), and will therefore not be classified as toxic o
hazardous.
2f Provide a detailed decription of the pretreatment, if any,
required by the San Diego Regional Water Quality Control Board :
The San Diego RWQCB has not required any specific pretreatme
of the groundwater. Cleanup and Abatement Order No. 87-17 a its associated documents specify only that a remedial
groundwater cleanup program be implemented to achieve the required cleanup levels.
Unisys proposes to install a stripping tower system to remov
solvents prior to discharge to th.e sanitary sewer system.
Please referrence Section 2h for a detailed description of t
proposed pretreatment system.
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2g Provide a detailed description of the alternatives considerec
including reasons why all other discharge alternatives were
not pursued:
The following alternatives were analyzed in an attempt to
comply with RWQCB Cleanup and Abatement Order No. 87-17 and -, ensure that Unisys cleanup actions would have no adverse
environmental impact on the Carlsbad community:
Alternative 1 - Provide no remedial cleanup of the groundwatc
aquifer.
The San Diego RWQCB has determined that remedial cleanup of
the groundwater aquifer is required in order to comply with the State's "Non-Degradationl' Policy. Cleanup and Abatement
Order No. 87-17 directs Unisys to implement a remedial groundwater cleanup program.
Alternative 2 - Install a stripping tower system and discharc
the treated groundwater to surface water.
Stripping tower systems represent the best technology
available for removing solvent contaminants from water. However, the RWQCB has denied permission to discharge the
treated groundwater to surface water (Cannon Lake) because oi
its low level metals concentrations and high nitrogen,
phosphorous and total dissolved solids (TDS) content. There .is currently no feasible method for reducing the TDS and
metals concentrations to acceptable levels.
Alternative 3 - Install a stripping tower system and pipe thE treated discharge water to an ocean outfall.
The RWQCB has denied permission to discharge the treated
groundwater to an ocean outfall because of low level metals concentrations which are not consistent with the State's Ocez
Plan. There is currently no proven, commercially available technology capable of reducing the metals concentrations to
the extremely low levels (5 ppb) required for ocean di.scharge
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Alternative 4 - Install a stripping tower system and re-injec
the treated groundwater back into the aquifer
Hydrogeologists from two independent consulting firms have
reviewed the Carisbad facility soil and aquifer data and
strongly recommended against attempting re-injection for the
following reasons:
a. Soil and water data obtained from the installation of nine
monitoring wells indicate that the subsurface soil layers
and aquifer are non-homogeneous strata which vary greatly
from location to location. Because of these variations, I
would be impossible to accurately model what would happen
to the profile of the aquifer if water is re-injected.
be The groundwater exists as a semi-confined aquifer which
starts at only eleven feet below the surface and is under
constant upward pressure. Significant pumping would be
required to force water back into the aquifer and the
level of the aquifer will rise approximately six feet near
the re-injection wells.
c. The groundwater is high in both total dissolved solids anc
biological nutrients. There is a high probability that tl
injection wells would clog up and cease to function from
the effects of biological growth, mineral deposits and or
compaction of the surrounding soils. New injection wells
would have to be installed at time intervals of a few- week
to a few months. Constant installation of new wells would
signifigantly slow down the cleanup process, increase the
potential for systems failure, and greatly increase
operating costs.
Alternative 5 - Install a charcoal filter solvent removal
system in place of the stripping tower.
The charcoal filter solvent removal system suffers from
exactly the same groundwater discharge limitations as the
solvent stripping tower alternatives. This system is alsc
more susceptible to to failures than a stripping tower ant
the solvent contaminated charcoal must be landfilled or
incinerated as a hazardous waste.
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2h Provide a detailed description of any pretreatment program
proposed to be established and implemented by the applicant
prior to discharge of any cleaned up groundwater:
Unisys proposes to install three groundwater extraction wells
and a countercurrent air stripping tower system to remove
solvent contaminants from the affected groundwater. Please reference attached Unisys Carlsbad Air Stripping Tower system
diagram.
In order to contain the contamination plumes and remove the
affected groundwater, three existing monitoring wells (MW-I,
MW-Q and MW-TI will be converted into extraction wells. Wate
pumped from the extraction wells will create depressions in
the groundwater aquifer and draw clean water in from the
. surrounding areas. As the clean water flows towards the
extraction wells, it will flush the contaminants out of the
soil and reverse the contamination flow. The contaminated
groundwater will then be pumped from the extraction wells to
the solvent stripping tower system.
The countercurrent air stripping tower system consists of twc
vertical, packed towers, two fresh air blowers, a transfer
pump and an automated control panel. Confaminated groundwate
from the three extraction wells will be pumped into the top o
the first tower and sprayed over packing material in order
to maximize the surface area of the water. Fresh air is blow
up through the packing material which, through a mass transfe
process, absorbs volatile organic compounds out of the water.
The transfer pump then sends this water to the top of the
second tower where the countercurrent air stripping process
will be repeated in order to insure that all of the solvent
contaminants are removed. This clean groundwater will then be discharged into the sanitary sewer system.
The solvent stripping tower system has been designed to
provide greater than 99% removal effi'ciencies for solvent
contamination levels several times greater than the maximum
levels which have been detected. In order to prevent the,
remote possibility of an accidental discharge of untreated
water to the Encina Joint System, controls have been designed
to automatically shutdown the extraction wells and stripping
tower system in case a problem is detected in any of the
active components. It should be emphasised that, even withou
pretreatment, the highest detected levels of groundwater
contaminants are still below allowable sewer discharge limits
for Unisys existing Industrial Waste Discharge Permit
(IWP #27). Remote alarms have been designed to automatically
notify the Unisys Rancho Bernard0 facility in case a treatmen
system problem is detected.
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Maxi mum Expected Groundwater D i scharge
Constituents Leve I s Leve I s
1,l Dichloroethane 50 ug/l < 1 ug/l
1,l Dichloroethylene 600 ug/l < 6 ug/l 1,1,1 Trichloroethane 1400 ug/l <14 ug/l
Methylene Chloride 180 ug/l < 2 ug/l
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Water meters will be installed on the treatment system to
allow the City of Carlsbad to properly charge Unisys for ail
applicable sewer fees.
The extracted groundwater wi I I be analyzed for solvents beforc
and after treatment in the stripping tower. This monitoring
will be performed when the treatment system is first set-up
and on a monthly basis thereafter. If no significant changes are detected in the monthly samples, then the monitoring will
be performed on a quarterly basis as required by the RWQCB.
Groundwater treatment will continue until the constituent
concentrations identified in Addendum No. 1 of RWQCB Cleanup
and Abatement Order No. 87-17 are attained. The groundwater
will be monitored .for one year after the cleanup levels have been achieved and, if the constituent concentrations remain
below required cleanup levels, then the stripping tower syster
will be removed. It is anticipated that the cleanup period will last between two and ten years.
21 Provide the full name and address of the employees and/or
officers of applicant who will be responsible for the pretreatment program of the applicant:
Local Contact: Thomas Paul Gordon
Project Manager Energy 8, Environment
Unisys Corporation MS-908
10850 Via Frontera
San Diego, CA 92127
(619) 451-4968
Corp. Contact: Gregory T. Fischer Corporate Manager Environment .& Energy
Unisys Corporation
25725 Jeronimo Road
Mission Viejo, CA 92691
(71 4 1 380-5532
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2j Provide a site plan showing the layout of existing
facilities, extent of groundwater contamination, and location
of' proposed cleanup wells and treatment facilities:
Please reference attached Unisys Carlsbad Site Plans.
2k Provide the amount of any general liability insurance
covering the applicant at the time the application is
submitted, the inception and expiration dates(s1 of any
general liability insurance policy(s), whether such insurance
policy excludes coverage for damages resulting from discharge
of contaminated groundwater, the name and address of the insurance agent for applicant and the name and address of the
insurance company that issued the general liability policy(s1
that provide gen'eral liability insurance coverage for the
applicant:
Unisys Corporation will maintain general liabilty insurance i
the amount of $6,000,000 (Please reference attached Certificates of Insurance). This insurance policy covers all
third party liability claims, including damages that might . result from discharge of contaminated groundwater.
Insurance Company: Alexander & Alexander Inc.
225 Public Ledger Building Philadelphia, PA 19106
Inception Date: 4/1/88
Expiration Date: 4/1/89 (To be renewed as required.)
21 Provide a description of the type of commercial, industrial
or other activity that is being or has been operate of
conducted at the cleanup site:
The Unisys Carlsbad facilty was formerly utilized for the
manufacturing of printed circuit boards and testing of
electronic components. The printed circuit board
manufacturing operations were discontinued in 1986 and the
facility is currently being utilized only for warehousing activities.
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PHUUUCEH THIS CERTIFICATE IS ISSUED AS A MATER Of INFORMATION ONLY AND cc NO RIGHTS UPON THE CERTIFICATE HOLDER. THIS CERTIFICATE DOES NOT 1 EXTEND OR ALTER THE COVERAGE AFFORDED BY THE POLICIES BELOW. ALEXANDER & ALEXANDER IMC.
225 Public Ledger Building Philadelphia, PA 19106
Corporate Headquarters Blue Bell, PA 19424-0001
POLICY NUMBER
COMPREHENSIVE FORM
INDEPENDENT CONTRACTORS
BROAD FORM PROPERTY DAMAGE
PERSONAL INJURY
NON-OWN55 AUTOS
WORKERS' COMPENSATION
2075 Los Palmas Drive
Carlsbad, California
Attn: Mr. Lloyd Hobbs
'WflRQFy FQnyyr
Alexander & Alexander, Inc.
225 Public Ledger Bldg.
Philadelphia, PA 19106
Unisys Corporation and all
Wholly Owned Subsidiaries
World Headquarters
Blue Bell, PA 19424
PRODUCTS/COMPLETED OPERATIONS
INDEPENDENT COKTRACTORS
BROAD FORM PROPERl’f OAMAGE
PERSONAL INJURY
ALL OWNED AUTOS (PRIV PASS.)
ALL OWNED AUTOS ( :&y!R,$fiN)
NON-OWNED AUTOS
GARAGE ilABlLlTY
SHOULD ANY OF THE ABOVE DESCRtsED POUCJES BE CANCELLED BEFOF PIRATION DATE THEREOF, THE ISSUING COMPANY WILL ENDE, City of Carlsbad California
2075 Las Palmas Drive
Carlsbad, California 92009-485 Attn: Lloyds Hobbs ALEXANDER & ALEXANDER, INC.
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