HomeMy WebLinkAboutContracts & Agreements_04-1988_CCv0001.pdf CDMCAMP DRESSER & McKEE INC.
2302 Martin Street
Irvine,California 92716
environmental engineers,scientists, 714 752-5452
poinners,&management consultants
January 26, 1988
Mr. Richard W. Corneille
City of Redlands
30 Cajon Street
Redlands, California 92373
Subject: Redlands Airport TCE Study
Revised Request for Phase 2 Contract Amendment
Dear Mr. Corneille:
Pursuant to our meeting with you on January 15, 1988, we have revised
the scope of work and associated costs for the subject study. We have
prepared the drilling specifications, with your verbal approval, for
this next phase of investigation and request the City's approval for a
contract amendment to provide for these additional services. Revised
details regarding the background, scope, estimated cost and schedule
for the Phase 2 activities are as follows.
Background
Phase 1 of the Airport TCE investigation is now complete, including
(1) compilation and evaluation of existing data and literature; (2)
conduct of interviews; and (3) identification of potential source
areas. The final product from Phase I is the Interim Report and the
Sampling and Analysis Plan (SAP) , recently approved by the Regional
Water Quality Control Board. The SAP identifies the Phase 2 scope of
work to be performed to determine the level of volatile organic
compounds (VOC) contamination at the site. Based on the SAP, the
original scope of work to be performed by CDM, as described in the
Agreement between the city of Redlands and CDM dated June 13, 1986,
has been modified. The following paragraphs briefly describe these
changes from the original scope of work. The revised scope of work is
described in more detail in Attachment A which accomrianies this
contract amendment request.
Task 4.1 of our original scope, (Conduct Soil Gas Survey) , has been
eliminated because the geological conditions encountered in the
project area were not conducive to this method.
CAMP DRESSER & McKEE INC,
City of Redlands
Mr. Richard W. Corneille
January 26, 1988
Page 2
Task 4.2, Perform Soil Sampling, has also been modified. originally,
three shallow (10-foot) excavations were proposed using a backhoe.
Due to the depths to be sampled, this task has been changed to the
drilling and sampling of two 30-foot soils borings.
Task 4.3, Construct Monitoring Wells, has been modified slightly.
only one 300-foot monitoring well will be constructed.
Task 5, Prepare Final Report, has also been modified. A draft report
summarizing the Phase 2 results for review by the City has been
included under this task.
Estimated Costs and Method of yayment
The total revised estimated cost associated with conducting Phase 2 of
the Redlands Airport TCE Study, as outlined in Attachment A, exclusive
of drilling costs, is $51,122, as shown on Table 1. The City has
requested that CDM only proceed with Phase 2, step 1, which includes
Tasks 1 and 2, and a portion of Task 4.0, Project Management and
Meetings, and Task 5.0, Technical Review. The total amount of hours
budgeted for Phase 2, step 1, is shown on Table 2. The total cost for
the associated work is $32,379.
This work will be performed on a time and material, not to exceed
basis. If for any reason total hours for a task are exceeded due to
difficult drilling or related field conditions, CDM will notify the
City immediately.
Phase 2, step 2, includes Task 3, Prepare the Draft and Final Report,
and the remaining portion of Tasks 4 and 5, as shown on Table 3. CDM
will not begin work on step 2 of Phase 2 (at an additional cost of
$18,743) without prior written authorization from the City.
CDM will invoice in accordance with the terms and conditions of the
existing Services Agreement between the City and CDM.
Schedule
The preparation of the Phase 2 plans and specifications have been
completed. After approximately one month to select a drilling
contractor, the field investigation portion of Phase 2 itself will
require one month to complete. The lab results for soil and
groundwater will require a 4- to 8-week turnaround time. CDM will not
start work on either the draft or the final report until the City has
CAMP DRESSER & WKEE 1NC.
City of Redlands
Mr. Richard W. Corneille
January 26, 1988
Page 3
notified CDM to proceed in writing, and has approved the associated
funding for the remainder of Phase 2 work. CDM will submit the draft
report within five weeks of notice to proceed for step 2, assuming the
lab data has been received. The final report will be submitted four
weeks after the City's comments on the draft report have been received
by cm
CDM sincerely appreciates this opportunity to assist the city of
Redlands with Phase 2 of the Airport TCE study. If you concur with
the proposed Phase 2 scope of work, estimated cost and schedule,
please indicate by signing both copies of this request for contract
amendment and return them to us. C'DM will proceed with the Phase 2
activities upon receipt of written authorization from the City.
Please feel free to contact us in the interim if you have any
questions.
Thank you for your attention to this request.
Sincerely,
CAMP DRESSER & MCKEE INC. Z
fyi Qow-e�
Suzanne owe William M ullan
Project Manager Associate
AGREED AND APPROVED:
14
By: C�_ ATTEST:
City of Redlands
Date: February 2, 1988
City CJerk
2068-119-DN-ADMN
CAMP DRESSER & WKEE INC,
ATTACHMENT A
REVISED PHASE 2 SCOPE OF WORE
Phase 2 of the Redlands Airport TCF Study consists of the preparation of
plans and specifications for conducting the field investigation and prepar-
ation of a final report, summarizing the data collected. The field
investigation includes (1) perform soil sampling, and (2) construct
groundwater monitoring wells. The following sections describe the services
to be provided by CDM during each task.
Task 1 - Prepare Plans and Specifications
Prior to beginning drilling operations, CDM will prepare the specifica-
tions, drawings and schematic details for the soil borings and monitoring
well. Specifications will include drilling, well construction, and
sampling procedures. Individual drawings showing the preliminary well
design and the well location, will be prepared. The City will provide
bidding instructions, agreements, standard specifications, site topography,
and utility easement information for the area around the site.
A draft set of drawings and specifications will be submitted to the City
for its review prior to the preparation of final drawings and specifica-
tions. CDM will provide requested assistance to the City during the review
process.
CDM will assist the City in reviewing the bids received from the drilling
contractors for the construction of the well. CDM will also assist the
City in negotiations with the Contractor.
Task 2 - Field Investigation
Subtask 2.1 Perform Soil Sampling
Two soil borings will be drilled to a depth of 30 feet. CDM will provide
one hydrogeologist who will be present during drilling and sampling of the
soil borings. During the drilling of each soil borehole, subsurface soil
and soil gas samples will be obtained from 15-, 20-, 25- and 30-foot
depths. The borings will be advanced using hollow stem auger techniques
with a split-spoon sampler used to collect undisturbed soil samples.
Immediately upon removal of the split spoon sampler from the borehole, a
soil gas sample will be collected down hole by driving soil gas sampling
equipment into the borehole 2 to 3 feet ahead of the bottom of the bore-
hole. The subsurface soil sample will be described and comments recorded
into the field notebook by CDM,. Soil gas samples will be analyzed in the
field with a laboratory gas chromatograph mounted on a truck. Samples (10
percent or up to 6 samples, whichever is greater) , with elevated soil gas
reading will be submitted to an FPA. certified laboratory for analysis for
purgeable halocarbons. Both the soil gas sampling and laboratory costs
will be borne by CDPD. The City will be responsible for contracting and
payment of drilling. The budgeted level of effort for this subtask assumes
a maximum of two 12-hour days to drill the soil borings and obtain soil and
soil gas samples.
CAMP DRESSER 4cKEE INC.
Bubtask 2.2 Construct Monitoring Wells
One 300-foot monitoring well will be constructed at the Redlands Airport.
CUM anticipates that the City will contract for the drilling services that
will be required. once a driller is selected by the City, CDM will monitor
construction activities, log and sample drill cuttings, and will provide
the final casing design. CDM will provide full-time monitoring services
during drilling, well construction and sampling. CDM will collect one
sample of the drilling fluid, one sample of the water supplied to the
drilling site and one water sample obtained from the monitoring well and
send the samples to an EPA certified laboratory for analysis for purgeable
organics (ERA Methods 601 and 602) . The time required to monitor the
construction of the well is highly variable, dependent upon problems which
may be encountered in the field. The budgeted level of effort for this
subtask assumes a maximum of 4-1/2 24-hour days to drill the borehole,
construct, develop and sample the monitoring well.
Task 3 - Prepare Report
Using information compiled during Phase 1 and the data collected and
evaluated during the field investigation, CDM will prepare a draft report
which summarizes the hydrogeologic setting, identifies possible spill
sites, and describes the limits of contamination by organic solvents. The
report will also recommend how the contaminated soil and groundwater (if
found) can most efficiently be cleaned up. After the report has been
reviewed by the City, CDM will prepare a final report. CDM will provide
the City with five copies of the draft report and ten copies of the final
report.
Task 4 - Project Management and Meetings
Project management includes meetings and coordination with the City and
Water Quality Control Board, client and contractor liaison, coordination
and schedule of project staff/activities, review and authorization of
payment requests by the drilling contractor, invoicing and monitoring the
project budget.
Task 5 - Technical Review
The objective of this task is to ensure that the analyses performed in this
study are done correctly and that the most appropriate: techniques are used
to generate and evaluate new data. This type of review is particularly
important in contamination investigations where the data collected may be
used later as evidence to defend the City in a legal action.
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