Page 209 - _ 180314 Special Yucaipa GSA Packet

Edwin H. Lin, PG, CHG

Pure Water Monterey Phase 1 and 2 Injection Well Facilities Design and Construction,
Monterey One Water
The Monterey Peninsula Pure Water Monterey (PWM) Project involves the recharge of 3,500
AFY of advanced treated recycled water into the Seaside Groundwater Basin. Todd
Groundwater has completed detailed hydrogeologic assessments over several years with
emphasis on the evaluation of target aquifers, recharge methods, and injection and recovery
sites. Mr. Lin serves as manager of the project’s field programs, which to-date has included
the installation of the project’s first deep injection well and initial monitoring wells. Field
activities have included sediment core analysis for hydraulic and geochemical assessment,
geochemical assessment of recycled water and groundwater compatibility, and regional
groundwater quality monitoring. Mr. Lin has evaluated recharge impacts to satisfy project EIR
requirements, prepared 60%, 90%, and 100% design submittals of well drawings and technical
specifications for two phases of construction (including the installation, development,
equipping, and performance testing of two deep injection wells, a vadose zone injection well,
and seven monitoring well clusters), and is managing and coordinating the drilling and
installation of all deep injection, vadose zone, and monitoring wells. Additionally, Mr. Lin is
working with project water reclamation to establish water treatment goals and civil engineers
to ensure conveyance pipelines can accommodate peak recycled water deliveries to injection
well facilities.

Recharge Site Characterization for Recharge Feasibility, Western Municipal Water District
As Project Hydrogeologist, Mr. Lin designed and supervised a hydrogeologic field investigation
to characterize the suitability of five separate sites in the Arlington Basin for managed aquifer
recharge of surface reservoir water. Subsurface characterization methods included Cone
Penetration Testing (CPT), hollow-stem auger drilling, double-ring infiltrometer tests, and lab
analyses for hydraulic and geotechnical properties. Mr. Lin performed analytical mounding
analyses to estimate the recharge potential of each site. Investigation results, including
geotechnical analyses performed by subcontractor Ninyo & Moore, indicated that an
enhanced recharge project at each of the five sites was feasible. Sites were ranked according
to the most favorable hydrogeologic conditions for recharge and conceptual designs were
developed for one site.

Groundwater Basin Conceptual Models, Feasibility Study, and Groundwater Management
Plan, Mojave Water Agency (MWA) and Bighorn-Desert View Water Agency
As Project Hydrogeologist, Mr. Lin developed basin conceptual models and evaluated water
supply and demand conditions to evaluate the feasibility of managed aquifer recharge (MAR)
with State Water Project water in three High Desert basins. As part of the study, Mr. Lin
helped design a geophysical surveying program, including 20,000 feet of multi-array electrical
resistivity and 35 time-domain electromagnetic surveys, to confirm vadose zone lithology and
fault locations. Findings indicated a MAR project would benefit communities in the Ames
Valley basin. Mr. Lin assisted MWA and the local water agency in preparing environmental
review documents and implementing a feasibility study to characterize the preferred MAR
site. A feasibility study was completed, involving the drilling and installation of monitoring
wells, aquifer testing, water quality analysis, and core analysis of vadose zone samples to
evaluate the infiltration potential of the target recharge location. Mr. Lin helped to construct

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