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A LEIGHTON CONSULTING INC -GEOTECHNICAL I
<br />PENCO Engineering, Inc. has solid working relationship
<br />with Leighton Consulting. When a project requires
<br />Geotechnical services, PENCO Engineering, Inc. will
<br />coordinate and facilitate the management of geotechnical
<br />services including: scheduling, oversight of preliminary
<br />sampling, testing, and exploratory excavations as well as the
<br />generation of geotechnical and material reports. PENCO
<br />Engineering, Inc. has a working history with Leighton
<br />Consulting, who, if needed, can work in conjunction with
<br />PENCO Engineering, Inc. to fulfill an of the City of Santa
<br />Ana's needs. This firm has performed geotechnical work all
<br />over Orange County and Southern California.
<br />rirm Profile:
<br />Leighton Consulting, Inc. (Leighton) provides engineer
<br />solutions to public agencies, property owners, and facilities.
<br />Their focus is the earth sciences encompassing the
<br />geotechnical and environmental disciplines. They provide a
<br />balanced team of licensed geotechnical engineers and
<br />engineering geologists experienced in identifying and
<br />mitigating geotechnical and geological hazards throughout
<br />California and Arizona.
<br />During their 47 year history, they have completed thousands
<br />of projects in the region, developing a vast database of
<br />geologic and geotechnical conditions, which is available to
<br />Leighton's engineers and geologists. Their clients benefit
<br />indirectly from this historical and scientific database.
<br />Their successful completion of projects up to $1 Billion in
<br />construction value, and over 35 awards for engineering
<br />excellence are a sound proof of their understanding of the
<br />importance of providing good service, on time and on
<br />budget for any size project, to sustain a long term
<br />relationship with their clients.
<br />Representative Projects
<br />On -Call Environment Services - City of Santa Ana
<br />Working under an on-call contract, Leighton has provided
<br />Phase I and II ESAs and remediation services for various
<br />projects, including the Transportation Center Art Wall and
<br />Bristol Street Widening, for the City of Santa Ana.
<br />Bristol Street Widening - City of Santa Ana
<br />In preparation for the widening of Bristol Street for the
<br />proposed Centerline Light Rail project, Leighton provided
<br />an investigation and identification of suspected
<br />underground storage tanks and associated fuel
<br />contaminants in site soils at First Street and Bristol in Santa
<br />Ana. Geophysical surveys were combined with direct push,
<br />hand auger, and hollow -stem auger soil sampling and
<br />selective trenching to identify a 10,000 gallon gasoline tank
<br />that had been abandoned in place. The environmental data
<br />was used to develop remedial response costs to offset the
<br />property purchase price. The tank removal and site
<br />remediation work was pending completion of the property
<br />purchase.
<br />Proposed Team:
<br />DJAN CHANDRA, PE, GE - PRINCIPAL ENGINEER
<br />Mr. Chandra brings 20 years of experience in geotechnical
<br />services for a broad range of projects including civil facilities,
<br />including large- scale residential and commercial
<br />developments, high-rise, transportation, governmental and
<br />utility projects. His areas of expertise include foundation
<br />design, soil reinforcement, slope stability analysis, finite
<br />element analysis, and computer applications in geotechnical
<br />engineering. His extensive experience in design and
<br />application of geosynthetics reinforcements in geotechnical
<br />engineering, including over steepened slopes, pavement sub
<br />grade stabilization, and segmental retaining walls has
<br />proven an asset on a variety of projects. He is familiar with
<br />various field monitoring equipment, such as inclinometer for
<br />slope monitoring, manometer level survey and settlement
<br />plate.
<br />VIVIAN M. CHENG, PE - PROJECT ENGINEER
<br />Ms. Cheng provides management and oversight of the work
<br />of other engineers and field technicians. She performs
<br />geotechnical engineering analyses, prepares reports, and
<br />provides oversight and monitoring of a broad range of
<br />geotechnical construction projects and supervises and
<br />reviews geotechnical engineering analyses and reports
<br />prepared by staff level engineers and field technicians. Her
<br />technical expertise includes design of shallow and deep
<br />foundation systems, seismic hazard analyses, settlement
<br />analyses, reinforced soil structures, slope stability analyses
<br />and ground improvement.
<br />Geotechnical Services:
<br />• Soft and/or compressible soils
<br />• Moisture sensitive (collapsible and/or expansive soils
<br />• Faulting and seismicity
<br />• Hazardous materials in the soils and/or ground water
<br />• Slope and excavation stability
<br />• Secondary seismic hazards such as liquefaction,
<br />seismically induced slope instability, lateral spreading,
<br />dynamic differential settlement, seiche and tsunami, etc
<br />• Ground water issues during construction
<br />• Methane and other hazardous gases
<br />• Corrosive and otherwise chemically active soils
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