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Sergio Martinez

Sergio Martinez
Assistant Scientist

Sergio Martinez

Assistant Scientist

Mr. Sergio Martinez is an assistant scientist with extensive hands-on experience in environmental monitoring, water quality assessment, and dredging investigation projects. His field experience spans diverse environments, including river channels, streams, the ocean, estuaries, reservoirs, and beaches, where he conducts stormwater, surface water, groundwater, and drinking water sampling.

Mr. Martinez plays a key role in planning and conducting both wet- and dry-weather monitoring events, maintaining and calibrating automated samplers and telemetry systems, and ensuring the delivery of high-quality data in support of municipal separate storm sewer systems (MS4) NPDES permit complia...

Mr. Sergio Martinez is an assistant scientist with extensive hands-on experience in environmental monitoring, water quality assessment, and dredging investigation projects. His field experience spans diverse environments, including river channels, streams, the ocean, estuaries, reservoirs, and beaches, where he conducts stormwater, surface water, groundwater, and drinking water sampling.

Mr. Martinez plays a key role in planning and conducting both wet- and dry-weather monitoring events, maintaining and calibrating automated samplers and telemetry systems, and ensuring the delivery of high-quality data in support of municipal separate storm sewer systems (MS4) NPDES permit compliance and total maximum daily load (TMDL) objectives for the Los Angeles Region.

In addition to his water quality expertise, Mr. Martinez supports marine sediment sampling and dredge investigations for major U.S. Army Corps of Engineers (USACE) projects in harbors along the coast of Southern California, including Long Beach, Newport Beach, and Oceanside. He plays a critical role in conducting vibracore and van Veen grab operations, requiring physical endurance and adhering to strict sampling protocols under demanding field conditions. Mr. Martinez has also managed sample control and processing for sediment cores collected for chemical, physical, and toxicity analysis. His contributions inform regulatory evaluations for maintenance dredging, beach nourishment, and offshore sand borrow site development, providing essential data for coastal resource management.

Prior to his work in environmental consulting, Mr. Martinez served as a lead utility forester, where he conducted quality control audits, fire risk inspections, and training for new staff in compliance under General Order 95 and the California Fire Code. With a strong foundation in environmental compliance, technical fieldwork, and leadership, Mr. Martinez is a key asset to Integral’s field operations and environmental monitoring programs.

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Environmental Monitoring

Implementation of the Lower Los Angeles River and Lower San Gabriel River Coordinated Integrated Monitoring Programs (CIMPs), Los Angeles County, California Participated as a field lead for watershed monitoring operations in support of compliance with the Los Angeles Regional MS4 NPDES permit requirements and TMDL studies. Led wet- and dry-weather sampling and non-stormwater outfall monitoring and maintains, tests, and programs automated stormwater monitoring equipment to ensure reliable, high-quality data collection. Implements health and safety protocols in the field and uses advanced storm control systems with remote telemetry to enhance sampling efficiency during storm events. Collects data that support regulatory compliance and informs regional watershed management strategies.
Upper San Gabriel River Enhanced Watershed Management Program, Los Angeles County, California Participates as a field lead for daily field operations across multiple sites in support of the Los Angeles Regional MS4 NPDES permit compliance under the Upper San Gabriel River CIMP. Leads wet- and dry-weather sampling events; ensures adherence to permit protocols; and performs programming, as well as cleaning, testing, and maintenance of automated samplers and other field equipment. Assists with hydrological data review and reporting in accordance with permit protocols. Supports and implements adaptive management decisions under the CIMP.
East Los Angeles Sustainable Median Stormwater Capture Effectiveness Monitoring, Los Angeles California Conducted dry- and wet-weather sampling at more than 10 best management practice (BMP) monitoring sites. Performed in situ water quality measurements and flow observations to assess system performance. Collected influent and effluent data from a sustainable median installation to evaluate pollutant load reduction and stormwater volume capture effectiveness.
Implementation of the City of Long Beach Nearshore (Non-Port) Watershed Integrated Monitoring Program (IMP), Long Beach, California Conducts stormwater sampling for estuarine and beach monitoring programs during both wet- and dry-weather events in support of regulatory compliance and environmental assessment objectives. Participates in field operations, maintenance and calibration of monitoring equipment, field data quality control checks, and preparation of monitoring reports.
Implementation of the Los Cerritos Channel Watershed CIMP, Los Angeles County, California Participated as a field lead for conducting wet- and dry-weather monitoring in support of the Los Angeles Regional MS4 NPDES permit. Responsibilities during storm events include collecting grab and composite samples, processing subsamples, and collecting in situ water quality data. Installs, maintains, and removes long-term sampling equipment at multiple sites at the start and end of the storm season. Additional duties include maintaining and calibrating the monitoring equipment, conducting data quality control checks, and contributing to report preparation to support regulatory compliance.

Groundwater Monitoring

Rincon Band of Luiseño Indians Groundwater Monitoring, Rincon Reservation, California Participates in groundwater sampling across tribal lands to support ongoing water quality monitoring efforts. Conducts quarterly sampling using low-flow bladder pumps to collect representative samples for laboratory analysis while ensuring proper documentation and timely delivery with completed chains of custody. High-quality data provided informs sustainable groundwater management and long-term resource planning while maintaining compliance with regulatory standards and supporting the environmental health of tribal water resources.

PFAS

Rincon Band of Luiseño Indians PFAS Monitoring, Rincon Reservation, California Participated in sampling for per- and polyfluoroalkyl substances (PFAS) at six groundwater production wells. Ensures ultra-clean sampling conditions that are critical for trace-level analysis. This work supports compliance with the fifth Unregulated Contaminant Monitoring Rule, safeguards the environmental health of tribal water resources, and contributes valuable data for sustainable groundwater management planning.

Sediment Sampling

Los Angeles River Estuary and Port of Long Beach Approach Channel Dredging Project, Long Beach, California Managed sample control for a USACE maintenance dredging project in the Los Angeles River Estuary (LARE). Processed more than 50 sediment cores for chemical analysis, bioassay testing, and bulk sediment compositing, ensuring proper handling, documentation, and data integrity. Supported evaluation of dredging, beach nourishment, and ocean disposal by providing high-quality sediment data from the LARE federal channel and sand trap.
Port of Long Beach Deep Navigation Project, Long Beach, California Managed sample control for a USACE sediment quality assessment supporting a proposed maintenance dredging and channel widening and deepening project. Collected sediment using vibracore and van Veen grab sampling methods, including operating vibracore equipment and ensuring adherence to sampling protocols and regulatory requirements. Sediment quality data was provided to the regulatory agencies in support of evaluations for dredging, beach nourishment, unconfined sediment storage, and ocean disposal.
Sediment Quality and Dredge Program Support, Newport Beach, California Participated in a USACE sediment quality assessment in support of proposed maintenance dredging of federal channels. Assisted with offshore sediment collection using vibracore and van Veen grab techniques in a fast-paced, physically demanding environment. Operated coring and sampling equipment using proper procedures and maintaining sample quality. Supported agency evaluations of sediment data for potential dredging, beach nourishment, or ocean disposal.
Ventura Harbor Vibracore, Ventura, California Operated vibracore equipment and a van Veen grab sampler aboard company vessel, ensuring safe and proper collection of sample cores. Worked in tandem with USACE to sample and test sediments from within shoaled areas of the Ventura Harbor federal channels proposed for maintenance dredging to provide sediment quality data for the evaluation of dredging and beach nourishment.
Oceanside Vibracore, Oceanside, California Collected sediment samples using vibracore and van Veen grab sampling while ensuring proper sampling procedures and maintaining sample quality. Worked in tandem with USACE to sample and test sediments from within shoaled areas of the Oceanside Harbor federal channels proposed for maintenance dredging to provide sediment quality data for the evaluation of dredging and beach nourishment.

Site Characterization

Offshore Sand Borrow Site Investigation, Long Beach, California Supported offshore sediment collection efforts for a study evaluating sand borrow sites for wind energy infrastructure development. Assisted with deployment and retrieval of vibracore and van Veen grab equipment, handled sediment cores, and maintained safe and efficient deck operations under challenging offshore conditions. Ensured proper sample handling and supported documentation in accordance with project protocols.

Surface Water Monitoring

Rincon Band of Luiseño Indians Surface Water and Algal Monitoring, Rincon Reservation, California Participates in surface water sampling from seven sites across tribal lands in support of ongoing water quality monitoring efforts. Conducts quarterly sampling to collect representative water and algal samples for laboratory analysis, ensuring proper documentation and timely delivery with completed chains of custody. High-quality data provided informs sustainable surface water management and long-term resource planning while supporting the environmental health of tribal water resources.
Puddingstone Reservoir Surface Water Testing, Puddingstone Dam Reservoir, California Participates as a field lead in surface water quality monitoring to assess compliance with TMDL objectives at Puddingstone Reservoir. Manages sample collection, documentation, and field operations to ensure data integrity and adherence to protocols. Manages field logistics, including transportation via a lifeguard vessel and delivery of samples to the analytical laboratory. The monitoring supports an evaluation of progress toward TMDL numeric targets.

Water Quality Monitoring

Rincon Band of Luiseño Indians Drinking Water Monitoring, Rincon Reservation, California Participates in monthly drinking water sampling for chlorine, total coliforms, and E. coli across multiple distribution systems, including faucets, fire hydrants, and quick-connect stations. Prepares equipment, ensures proper sampling techniques, and supports timely data reporting to ensure compliance with regulatory standards.
Calleguas Creek Watershed TMDL Water Quality Program, Ventura County, California Conducted quarterly water quality monitoring at more than 30 sites throughout the Calleguas Creek Watershed. Responsibilities included in situ water quality and stream flow measurements as well as sample collection. This project supports TMDL implementation to ensure compliance with the Clean Water Act and the Porter-Cologne Water Quality Control Act.
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