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Leighton Consulting
<br />I(A6) Environmental Services
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<br />• Sampling: Soil and/or groundwater sampling will be conducted In accordance with federal,
<br />state, and local guidelines with the objective of obtaining representative samples of the
<br />subsurface materials. No two projects are alike, each requiring a thorough review of
<br />background information to establish an appropriate sampling plan. Leighton will Include a
<br />r, site-specific sampling plan as part of the work plan document.'rhis sampling plan will
<br />... Identifythe media to be sampled (e.g., soil, water, soil gas, etc.), the sampling
<br />LV methodology (e.g., drilling, trenching, push -probe, monitoring well, etc.), the sample -
<br />containers (e.g., glassjars, brass sleeves, EncoresTM, VOA vials, etc.), preservatives, and
<br />sample handling and chain -of -custody procedures.
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<br />CITY OF SANTA ANA I RIGHT OF WAY CONSULTING AND RELATED SERVICES ) 22
<br />ca
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<br />more than 500 projects in southern California. We have developed strong working
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<br />relationships with Gregg Drilling and Millennium Environmental because of their
<br />knowledge of the required work and regulatory environment, their work ethic, and their
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<br />cost-effective approach to project execution.
<br />In most cases, Leighton would utilize a direct -push rig to collect soil and initial grab
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<br />groundwater samples. This field methodology is less Intrusive and considerably more cost-
<br />effective than drilling with hollow -stem auger rigs, and generates very little Investigation -
<br />derived waste (IDW). When permanent groundwater monitoring wells are required, we will
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<br />primarily use hollow -stem auger drilling equipment to advance soil borings for well
<br />Installation. We have installed thousands of groundwater monitoring wells from single
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<br />completions in shallow water table aquifers to nested, multi -well completions In confined
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<br />and multilayered aquifers. We have designed and installed monitoring wells intended for
<br />the recovery of various for petroleum hydrocarbons Including volatile organic compounds
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<br />(VOCs), various light non -aqueous phase liquids (LNAPLs - floating product), dense non -
<br />aqueous phase liquids (DNAPLs), and other dissolved compounds. Leighton will obtain all
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<br />necessary permits from the appropriate regulatory agency prior to installing any monitoring
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<br />wells and will register the wells with the Department of Water Resources (DWR), as
<br />required. All drilling will be performed under the oversight of a Professional Geologist (PG)
<br />or Civil Engineer (CE) registered In the State of California.
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<br />• Sampling: Soil and/or groundwater sampling will be conducted In accordance with federal,
<br />state, and local guidelines with the objective of obtaining representative samples of the
<br />subsurface materials. No two projects are alike, each requiring a thorough review of
<br />background information to establish an appropriate sampling plan. Leighton will Include a
<br />r, site-specific sampling plan as part of the work plan document.'rhis sampling plan will
<br />... Identifythe media to be sampled (e.g., soil, water, soil gas, etc.), the sampling
<br />LV methodology (e.g., drilling, trenching, push -probe, monitoring well, etc.), the sample -
<br />containers (e.g., glassjars, brass sleeves, EncoresTM, VOA vials, etc.), preservatives, and
<br />sample handling and chain -of -custody procedures.
<br />w, \
<br />CITY OF SANTA ANA I RIGHT OF WAY CONSULTING AND RELATED SERVICES ) 22
<br />ca
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