Our History

Sidera Environmental, Inc., operating since 1988 and established in 1995, started as a duo of a former wastewater and storm water inspector re-entering the private sector. With environmental experience dating back to the early 80’s, Sidera provides a regulator’s perspective for those under compliance programs.

We service family owned businesses and many Fortune 500 companies. Our small yet effective team of professionals offers over 50 years of combined experience. Our job is to make industrial compliance simple and easy. We have monitoring and training programs to fit your facility, personnel, and budgetary needs. Sidera’s staff works to understand your company operations and seamlessly integrate environmental knowledge to optimize your facility operations.

Ray Stewart received his Bachelors in Chemistry from Cal Poly San Luis Obispo and his Masters in Mechanical Engineering from San Diego State University. His expertise led him to positions as an Industrial Waste Control Officer in Goleta Sanitary District, Environmental Engineer in Applied Magnetics Corporation and an Environmental Engineer in Chevron USA. Due to his longevity in the field, Ray has helped countless industrial facilities with compliance requirements.

Kat Katura, founder of Sidera Environmental, Inc., graduated with a Masters in Business Administration from Virginia Commonwealth University. An avid sailor and captain, her love for the world was evident in her travels. She had an affinity for water chemistry and its involvement in environmental and public health, making Sidera a perfect fit for her passion. Sidera is named after her sailboat, The Sidera, that she lived on in Half Moon Bay while she was consulting for hazardous material compliance throughout the bay area in the late 80s. In the early 90s, storm water regulations were becoming statewide and she began accepting projects related to the Industrial General Permit

Meet The Team

Arturo Huerta
President of Client Relations, QISP License #00488

Arturo began his career at the University of California, Santa Barbara testing local waterways for commercial and residential run-off pollutants. Before graduating Cum Laude in Public Health Policy from UC Irvine, he used his Chemistry background to work under the university’s Environmental and Hazardous Waste Manager for three years. Meanwhile, he became involved with manufacturing as an EH&S Intern at Zodiac Aerospace, assisting with hazardous waste management, storm water, and hazardous material permitting. At Irvine, he was eventually promoted to Hazardous Waste Technician, responsible for processing and handling hazardous waste, inspecting research laboratories for regulatory compliance, and managing chemical inventory reporting. Today with Sidera, his holistic approach to permitting has made clients aware of potential consequences and benefits of their facility’s operations. Has worked through lawsuits, with local, state and EPA inspectors, and he ensures all parties are accommodated to prevent further repercussion.

Ray Stewart
Lead Environmental Consultant Specialist

After graduating from Cal Poly San Luis Obispo in Chemistry and obtaining his Masters in Mechanical Engineering at San Diego State, Ray began his career in wastewater pretreatment inspection as an Industrial Waste Control Officer for the Goleta Sanitary District. He moved to industrial wastewater treatment with Applied Magnetics Corp. – managing the design, construction, and operation of the treatment systems and ultra pure water systems for their facilities worldwide. Later, with Chevron’s Point Arguello Project, Ray received oil and gas from three offshore platforms and ensured compliance with discharge limitations to two direct marine outfalls. Today with Sidera, Ray enjoys assisting industrial facilities to comply with the NPDES Industrial General Permit and wastewater regulations. With forty years of industry knowledge, Ray develops clients’ understanding of the industrial processes & operations that may affect pollution limitation and compliance issues.

Jared Dozal
Environmental Scientist & Consultant Specialist, QISP License #00364

Jared has been keenly aware of environmental issues since measuring water quality during an elementary field trip in his hometown of South Lake Tahoe. After high school, a four-year college was not an option due to his family’s financial situation. Instead, he spent ten years working construction before returning to study Environmental Engineering Science at UC Berkeley. Prior to Sidera, his experience ranges from monitoring southern California watersheds for pollutants with local NGOs to managing a clean water project in Peru for Engineers Without Borders. Today with Sidera, he has been assisting various industrial facilities in complying with the NPDES Industrial General Permit. As a licensed QISP, his duties include site assessments, drafting SWPPPs & Site Maps, developing Monitoring Plans, employee training, Level 1 & 2 ERAs, and all other aspects of permit compliance. 

Cristopher Rangel
Environmental Consultant & Biology Specialist

Prior to graduating in Molecular Biology from the University of California, Santa Cruz, Cris spent two years involved in Agroecology and Molecular Biology research at the university. While performing research, he was responsible for analyzing soil samples for various organic and inorganic analytes in order to test various methods of eradicating pesticide use while increasing crop yields and eliminating pests. Next, Cris moved on to a small mammal research laboratory that allowed him to hone his skills in measurements, observations, and record keeping. His experience included hazardous waste management, ensuring laboratory compliance with OSHA standards, aiding in experimental design, and handling sensitive materials. He gained valuable skills in laboratory science and was responsible for training new lab members during his tenure. Today with Sidera, Cris supports various aspects of industrial compliance programs.

Client List

Aerospace Manufacturing Group

Aggressive Engineering Corp.

Alisal Union School District

All Aboard America!

AMA Plastics

American Cab Co.

Artistic Marble & Granite

Aryzta Fresh Start Bakery Inc.

B & D Lithography

B & P Marble

Boskovich Farms, Inc.

CHEP Pallets

Concord Yellow Cab, Inc.

County Quarry Products, LLC

C & C Recycling

Evergreen USD

Clark’s U-Save Rockery

Del Rio Transportation

Della Maggiore Stone

Eritrean Cab

Fremont USD

Green Zone Recycling

Hanmar Corporation

Hess Collection Winery

Moreland USD

Northern Refrigerated Trans.

Pittsburg USD

Spaulding Boatyard

Pallet Masters

Worldwide Green Resource, Inc.

USG Interiors, Inc.

Evoqua Water Technologies, LLC

Industrial Metal Recycling

IPS Corporation

Zodiac Seats

Key Container Company

KenWalt Die Casting Co.

Laclede, Inc.

Medway Plastics Corp.

Merle Norman Cosmetics

Metal Container Corp.

Monte Bella Elementary School

MK Diamond Products, Inc.

Modern Concepts

MS International, Inc.

National Recycling Corporation

Washington USD

Half Moon Bay Building & Garden Supply

Ontario Extrusions

Pacific Coast Trane Services, Inc.

Pacific Fruit Processors

Powertrain Industries

River City Waste Recyclers

Savage Industries, Inc.

Seamark Boatyard

Selvage Concrete Products, Inc.

Setzer Forest Products, Inc.

Southland Pipe Corp.

Sun Express Charter Co.

Sun Land Garden

Super Micro Computer, Inc.

SI Tour Coaches

Waterway Plastic

Horizon German Used Auto Parts