Jordan DiMezzo, G.I.T.

Geologist
Hydrex Environmental
Nacogdoches, Texas
Email: jdimezzo@hydrex-inc.com

Education
M.S. Geology
Stephen F. Austin State University
Nacogdoches, Texas

B.S. Geology
Stephen F. Austin State University
Nacogdoches, Texas

Certification

• Geologist‑in‑Training, No. 670

Summary of Geoscience Work
Ms. DiMezzo, G.I.T., is a Geologist with more than seven years of experience supporting municipal solid waste (MSW) facilities through environmental monitoring, remediation support, and regulatory compliance services at Hydrex Environmental in East Texas. Her professional background focuses on landfill gas and groundwater monitoring, regulatory compliance, remediation activities, and permit modifications. This work requires applied and theoretical interpretation of site‑specific geology, groundwater flow behavior, and subsurface processes. These interpretations support landfill gas management, groundwater monitoring, and remediation programs.

She has developed extensive experience with landfill gas collection and control system (GCCS) operations and maintenance and gas and groundwater monitoring programs.  Additionally, her work includes statistical evaluation of groundwater data, and detailed review of laboratory analytical results. Her work integrates field observations with data analysis to support compliance‑driven decision‑making.

In addition to routine monitoring and compliance activities, she has conducted renewable natural gas (RNG) and biogas sampling for landfill gas pipeline injection, Tier II sampling, and Phase I and Phase II Environmental Site Assessments. She also manages the ongoing operation, maintenance, and troubleshooting of landfill gas and groundwater remediation systems. Her role combines hands‑on technical execution with project management responsibilities.  These include oversight of landfill gas monitoring and remediation activities, identification and resolution of system performance issues, and review of regulatory reporting to ensure completeness, defensibility, and regulatory usability.  Additionally, she works closely with field technicians and contractors to address system performance issues and maintain compliance during day‑to‑day operations.

Landfill Gas Management and Remediation
Ms. DiMezzo oversees landfill gas monitoring and remediation programs for MSW facilities, providing comprehensive project and program management.  Her responsibilities include budget and scope development, technical proposal preparation, resource allocation, schedule management, and remediation system design and construction. She has managed landfill gas systems across Texas and Louisiana, directing field activities, submittal regulatory documentation, overseeing contractors and subcontractors, and ensuring compliance with applicable regulatory requirements.  In this role, she also serves as a client liaison, providing regulatory and compliance guidance, overseeing regulatory obligations, evaluating compliance risks, and contributing to the development and execution of long‑term landfill gas management and compliance strategies.

Additionally, Ms. DiMezzo is responsible for managing landfill gas exceedances in accordance with Texas Commission on Environmental Quality (TCEQ) requirements under 30 Texas Administrative Code (TAC) §330.371. Her work includes oversight of regulatory required monitoring and follow up confirmation monitoring. She evaluates potential landfill gas migration pathways through evaluation of subsurface geological conditions and coordinates and implements corrective action and protection of human health.  Following initial contingency plan implementation, she is also responsible for the preparation and review of required regulatory documentation, compliance reports, and the implementation of remediation systems/efforts.

She oversees landfill gas remediation efforts through numerous avenues.  These includes GCCS optimization, including evaluation of extraction well performance and integrity, system balancing, and operational adjustments to improve gas capture efficiency and control off‑site migration. In addition, she directs the planning and implementation of subsurface gas migration control systems independent of active GCCS operations. These systems include, but are not limited to, soil vapor extraction (SVE), passive venting systems, trench vent systems, and solar‑powered fan remediation systems. System selection and design are based on interpretation of site‑specific geologic conditions, waste characteristics, and native soil properties.  As part of these efforts, she also evaluates remediation effectiveness and adjusts efforts as necessary. 

To improve efficiency and maximize effective correspondence, Ms. DiMezzo has also led the development and implementation of standardized electronic documentation and data management systems for the landfill gas program.  These new systems improve regulatory tracking, data integrity, reporting efficiency, and consistency across multiple facilities.

Groundwater Monitoring and Reporting
Ms. DiMezzo has supported project‑level groundwater monitoring programs at MSW facilities, contributing to the planning and execution of groundwater sampling, flow analysis, data evaluation, and regulatory reporting. Her experience includes preparation and interpretation of potentiometric surface maps, isoconcentration maps, statistical evaluations of groundwater geochemical data, and development of alternate source demonstrations to address groundwater exceedances.

She applies site‑specific geologic and hydrogeologic data including stratigraphy, groundwater elevations, and boring logs to support groundwater flow interpretation and compliance‑focused evaluations. By integrating subsurface data with groundwater monitoring results, Ms. DiMezzo develops technically defensible interpretations and clearly communicates findings in support of regulatory documentation and project execution.  This practical, data‑driven approach supports the development of reliable groundwater evaluations and compliance documentation that meet regulatory and project requirements.

Additional Experience
Ms. DiMezzo has additional experience supporting environmental field investigations and monitoring activities, including the installation and logging of landfill gas and groundwater monitoring probes and wells. Her field work includes documentation of lithology, groundwater conditions, and construction details to support monitoring network development and data interpretation.

She has assisted with Phase II Environmental Site Investigations, including implementation of field sampling programs, coordination of soil, groundwater, and soil gas sampling, and collection of environmental data to delineate the nature and extent of subsurface impacts. Her responsibilities have included detailed field documentation, adherence to approved sampling and quality assurance/quality control protocols, and coordination with analytical laboratories to ensure data usability.

Ms. DiMezzo also has experience assisting with Tier II field sampling, including application of approved sampling methodologies, evaluation of analytical results, and preparation of supporting documentation for regulatory review. She has also managed RNG landfill and dairy gas sampling and injection testing, overseeing data collection and performance verification in support of operational and compliance objectives.

As a result of her combined experience in landfill gas management, groundwater monitoring, remediation design, and regulatory compliance, Ms. DiMezzo provides valuable support to MSW facilities and projects. Ms. DiMezzo’s applied, detail‑oriented approach supports effective environmental compliance and defensible technical evaluations.  This approach is grounded in hands‑on field experience and project‑level data review.