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Kajori Purkayastha, P.E.
<br />months, development, coordination, and execution of the preliminary design report, and 30%
<br />and 60%design drawings.
<br />Sunset Groundwater Treatment Facility Final Design, Pasadena Water and Power, Pasadena,
<br />CA I Project Engineer
<br />Process mechanical engineer for design of centralized GAC and IX facility treating 1,2,3-TCP
<br />and perchlorate for four wells (total flow 3,000 gpm). Supported disinfection facility design
<br />development.
<br />Wells 9,19,23, AND 24 PFAS Treatment Systems, Orange County Water District, Final Design
<br />and ESDC, Orange County Water District, City of Orange, CA I Project Engineer
<br />Responsible for development and execution of final design drawings and coordination of bid and
<br />construction phase services for wellhead treatment of PFAS for four wells, which includes Ion
<br />Exchange treatment of wells rated 1,400 to 2,500 gpm as well as cartridge filtration upstream of
<br />Ion Exchange treatment. In addition to multi -discipline coordination during final design, bid, and
<br />construction phases, served as the processtmechanical lead for the project.
<br />Well Q2 Perchlorate Removal Facility Final Design, Santa Clarita Valley Water Agency, Santa
<br />Clarita, CA I Project Engineer
<br />The Well Q2 treatment facility has a capacity of 1,200 gpm. Raw water from Q2 well also
<br />contains perchlorate sampled above the California MCL. IX was considered due to the space
<br />savings compared to GAC, effectiveness of removing both long -and short chain PFAS
<br />chemicals, as well as the ability to address other contaminants, such as perchlorate in the raw
<br />water.
<br />PFAS Groundwater Treatment Project (N•Wells) and Well Q2 Perchlorate Removal Facility,
<br />Santa Clarita Valley Water Agency, Santa Clarita, CA I Project Engineer
<br />N-Wells PFAS Treatment facility includes ion exchange treatment system consisting of three
<br />lead -lag IX trains with PFAS selective resin designed to treat 2,000-gpm each, and three high -
<br />rate cartridge filters with 12, 6-inch diameter filter elements each. Final design also included
<br />1,200 glom Well Q2 perchlorate removal facility which consisted of one lead -lag IX train with
<br />Perchlorate selective resin. Project delivery included pre -purchasing long -lead items such as IX
<br />Systems and pre -filters, pre -selecting OSHGS and chemical systems. Agency self -performing
<br />some work for Q2 site, and pre -purchasing the IX resin.
<br />Preliminary Design Services for Well 205 Perchlorate Removal Facility, Santa Clarita Valley
<br />Water Agency, Santa Clarita, CA I Engineering Support
<br />Planning and preliminary design of a wellhead Groundwater Treatment Facility for SCV Water's
<br />Well 205 with a treatment capacity of 2,700-gpm. Assessed perchlorate and TCE treatment
<br />alternatives including IX, PTA, and GAC. Developed preliminary design for GAC and IX system,
<br />including pre -filters and chemical area for removal of perchlorate and TCE from the
<br />groundwater.
<br />Groundwater Supply Project and Regional Groundwater Storage and Recovery Project, San
<br />Francisco Public Utilities Commission, San Francisco, CA I Project Engineer
<br />Conducted evaluation of treatment alternatives for removal of nitrate, hexavalent chromium, and
<br />various VOCs from several groundwater wells in the city of San Francisco. Assisted with
<br />process selection, facility sizing, and conceptual cost estimates.
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