Licensing/Experience/Our Team

(310) 880-9647 Email Us Free Quotes; no Obligation

Key Work Areas:

Brownfields/Superfund/CRCLA/contaminated sites, 40-Hour HAZWOPER labor assistance, weed abatement, environmental cleanups, homeless encampments, jobsite services/maintenance, erosion protection, BMP installations, hydroseeding, fence work, graffiti removal, Underground Storage Tank (UST) removals, Above-Ground Storage Tank (AST) removal, contaminated soil removal, Biohazard cleanups, crime scene/death cleanups, pumping/dewatering services, property boardups/eviction assistance, Hexavalent Chromium cleanups, Fentanyl/Meth Lab/Narcotics cleanups, Lead surveys/abatement, Bobcat services, Asphalt patching/road repair, street sweeping, confined space work, tank cleaning and industrial hygiene, Level B/Supplied Air work, vapor/VOC monitoring, dust/air monitoring, hydroxyl/ozone treatments, deodorization, sewage leak cleanup/sewer work, hazardous waste containment, Demolition services, water quality testing services, Legionella sampling, 55-gal drum/HAZMAT disposal & transportation, stormwater (SWPPP/NPDES) permitting and inspections (QSD/QSP), permit compliance (AQMD, DTSC, Water Board), soil sampling/soil studies, Green Stormwater Infrastructure (GSI), disinfection/sterilization/UV/anti-microbial, Cannabis/Narcotics management, Lab Pack management, waste tire/used tire recycling, Radon monitoring, NORM/Radioactive Materials work, scrap metal and concrete removal, Roll-off bins, Landscaping, tree removal/trimming, Environmental Site Assessments (ESA), Mold inspections/remediation, and more.

See our Statement of Qualifications Here

See our MBE/DBE/Minority Certification Here

* Top 10 of 2024 in Environmental Business Outlook Magazine *

Company Experience & Profile:

Featured as Environmental Business Outlook’s Top 10 of 2024, we are a Southern California-based MBE/DBE/Federal General Engineering Contractor specializing in hazardous waste remediation, stormwater management, contaminated brownfield maintenance, and many more services for public works, private developments, and major Superfund/CRCLA sites. We are certified Minority-Owned/MBE, Disadvantaged Business/MBE, and Small Business-Public Works/SBPW, GSA, Tribal, and Federal Contractors. Previously as Mayfield Enterprises, we have over two generations of high-profile project management experience since 1985. We have contracted with the City of Cerritos, Norwalk, Carson, Santa Fe Springs, and more governments in addition to high-risk environments like Exide Superfund, Ascon Superfund, Cal Compact Landfill, BKK Landfill, Montrose Chemical (DDT) Superfund, Omega Superfund, China Lake Naval Weapons Base, OII Superfund, WDI Superfund, and more for decades. The company is family-owned and currently headed by CEO James Mayfield (QSD/QSP/QISP/CPMSM/CPESC/CISEC) and based out of Long Beach with our main yard in Carson. We are registered for Public Works in California, CalTRANS, and Federal & Tribal projects. We have decades of contracting experience in refineries, power plants, Superfunds/CRCLA, substations, vacant lots, storm sewer/storm canal systems, treatment facilities, industrial plants, gas stations, airports, and more.

Building off over 3 decades of experience absorbed from his partner and father Jim Mayfield (Mayfield Enterprises, Inc.), James mastered the industry in Project Management for over 15 years on HAZMAT, Brownfield, and SUPERFUND/CERCLA Sites and projects of all sizes throughout Southern California. James was Mayfield Enterprises‘ chief Project Manager, Environmental Officer, & Hazmat Engineer from 2005 to 2022. Mayfield Enterprises had previously become famous for cleaning up the Cerritos Air Disaster that killed 82 people, for toxic soil remediation in preparation for the placement of the Spruce Goose at the Port of Long Beach (see photos below), remediation at Waste Disposal, Inc. (WDI) and Montrose DDT, Stringfellow Superfund, and jet fuel cleanups at Camp Pendleton Air Force Base.

Eventually, James applied this knowledge and experience with a greater focus on environmental reclamation, evolving into Mayfield Environmental Engineering (dba Mayfield Environmental Solutions) before taking over both corporations at once. All James Mayfield’s licensing and certifications were achieved independently from scratch and were not transferred. In addition to being a Stanford-educated Professor with over 30 publications and books in several languages, James’ real passion lies in Construction-related Project Management, Environmental Cleanups, Hydrogeology (Stormwater Management), HAZMAT, Excavation, and Field Labor.

The rest of OUR TEAM are composed of skilled field laborers, operators, and scientists who bring wide ranges of skills and experience. Many have worked with us for decades. Our partners and subcontractors have close and longstanding relationships with us that will bring dependability and diverse skillsets to your jobsite.

See many more reasons why we beat our Competition for decades in Southern California.

Hazardous Waste Licenses + Confined Space +Trauma Waste:

Our HAZMAT Licenses are attached to James Mayfield’s #833333 General Engineering “A” License, including California’s rare Hazardous Substances Removal License. All HAZWOPER certification, Health & Safety/IIPP/HASP and required respirator fit testing certifications are provided upon request in compliance with Cal/OSHA.

Our Demolition, Grading, Excavation, and Road Repair services are licensed under our General Engineering “A” License.

We are licensed for Industrial Hygiene, tank cleaning, and confined space work through our Hazardous Substances Removal License (#833333), OSHA 40-Hour HAZWOPER certifications, and through site-specific permitting.

Our 1166/AQMD permitting, often used for our Environmental Site Assessment (ESA) work or contaminated soil excavation are attached to our Hazardous Substance Removal License and General Engineering “A” License.

We are licensed HAZMAT transporters through DTSC, EPA, DOT, and FMCSA Registration #7097, EPA #CAL000482049. If we can’t fit it on our trucks, our partners will while we use our licensing to oversee comprehensive Hazardous Substances management and compliance.

We are Asbestos Certified through the CSLB and DOSH (attached to #833333 License), giving you additional power for bidding and contracting.

We are Trauma Waste Practitioners/Transporters through the California Dept of Public Health (#835) and a licensed Medical Waste/Chemotherapy Pharma Transporter #7097 through CDPH. We are also Biohazard/Crime Scene certified through the National Institute of Decontamination Specialists (NAIDS). We are a certified Bio-Recovery Member Company through the American Bio-Recovery Association (ABRA). As part of our work with biohazards and crime scenes, all our staff are OSHA Bloodborn-Pathogen certified (29 CFR 1910.1030 (Hantavirus, HIV/AIDS, etc.)). We are also Meth Lab Decontamination certified through Amdecon/TexasA&M and through NAIDS, 2023-. We are also certified Tear Gas Decontamination Specialists (NAIDS), 2023- and certified Vehicle Decontamination Specialist (Blood, Death, Drugs) through NAIDS (2023-). (2023-). We are further licensed for Crime Scene/Decomposition/Death Cleanup through Amdecon/Texas&AM (2023-).

In addition, if required, we are fully licensed for Level B/Supplied Air work with proper medical clearance and fit testing when required, as supported by extensive recordkeeping and our robust Health & Safety Plan. This includes work with NORM/Radioactive Material/Radon Mitigation and Lead.

Our Radon Licensure is attached through the National Association of Radon Professionals (NRPP-AARST) (#114310-RMP), California Department of Public Health, and the Environmental Consultants and Affiliates association. We have licensed Radon Measurement Professionals (RMPs) on staff.

We are also certified for Mold Testing, Mold Remediation, and Inspections through the IICRC (Institute for Inspection, Cleaning, and Restoration Certification) as Certified Mold Remediation Specialists (MRSs) (certified firm #70176445), through NAMP (National Association of Mold Professionals), and we have Certified Mold Remediators (CMR) on staff through the Professional Mold Inspection Institute, #CMR0000047608.

We are a certified Waste Tire/Used Tire Recycler through CalRecycle/State of California, since 2022. Our specific tire bond number is #101222759 through Western Surety and CalRecycle ID #1956618. All shipments of used or waste tires are logged and documented in accordance with California state law and recycling standards.

Stormwater, Soils, Water Quality, & SWPPP Licenses:

Among our other Scientists, James Mayfield is a registered QSD (Qualified SWPPP Developer, #28219), QSP (SWPPP Practitioner, #28070), QISP (Industrial SWPPP Practitioner, #01304), CPESC (Certified Professional in Sediment and Erosion Control, #00011558), and CISEC (Inspector of Sediment and Erosion Control, #3324), a CPMSM (Certified Professional in Municipal Stormwater Management), and a Caltrans WPCPM (Water Pollution Control Plan Manager). He has done SWPPP inspections, installed SWPPP protocols and BMPs, developed Stormwater Management, and overseen Waste-Water management and pumping services for over 15 years.

We are licensed C-27 (Landscaping/Landscaping Architecture/Arborist/Tree Work) via CSLB #833333.

Water Quality & Soil Sampling Services: all samples are transported with official chain of custody to ELAC-licensed laboratories and a certified analytical report will be returned to you with all legal forms required. Our testing for Legionella and other biological agents is overseen under all proper OSHA compliance with thorough Chain of Custody through a CDC-certified laboratory.

DBE/MBE/Federal/Minority Status, Fleet Numbers, & Insurance:

Our CA Contractors License (for A, HAZ, C-27, ASB) is #833333. Our Articles of Incorporation is #C4725891. Contact us directly for our Workers’ Comp, Liability Insurance, Bonds, and other sureties.

We are also a Minority-Owned Business (MBE#22000279) and a Disadvantaged Business Enterprise (DBE#51331), making us highly competitive for your Public Works and Bidding. James Mayfield is a Native American citizen of the Iowa Tribe of Kansas and Nebraska (Baxoje). See our MBE/DBE Certification here.

We are a licensed Federal/Tribal Contractor registered through SAM/GSA/8A-Set Aside (UEI#C6GTE7N8SK53; CAGEID# 9Q857).

We are California Small Business Certified (SB) and “Small Business for the Purpose of Public Works” (SB-PW) Certified #2031938.

We have California Public Works License #PW-LR-1000882471. We are fully set up for Prevailing Wage / Certified Payroll.

For HAZMAT Transportation services, our DOT # is 3983661, CA/MCP# 0620477, and EPN Number #HM085; DTSC Registration #7097, Permanent EPA #CAL000482049. If we can’t fit it on our trucks, our partners will while we use our licensing to oversee comprehensive Hazardous Substances management and compliance.

Partnership Experience:

Among many other partners, we has worked with Project Navigator, RE Solutions, Crew Grading Inc., WSP, SCS Engineers, TRC Corporation, GeoSyntec, Snyder Langston, Leighton Corporation, NV5 Environmental, Entact Corp, Waste by Rail, Michael Baker, ERRG, O&M Corp, Demaximis Inc, O&M Inc, Golder Group, Path Forward Consulting, New Cure, American Integrated, Largo Concrete, ABC-Liovin, Colliers, B&D Construction, Xebec, WorkSmart, JLL Enterprises, Arcadis, Blaine Environmental, Crosby and Overton, Global Transloading, Altus Technology Solutions, Ancon Environmental, CW Driver, Enviroserv, Utiliquest, and more, Amdecon, Capitol Environmental, Western Labs, Positive Labs, Smith-Emery Labs, NEC Environmental Engineers, JHA Environmental, Ancon, Bechtel, Belshire, Waypoint Analytical, Altus Technology Solutions, EnviroCheck, 5M Contracting, Cardinal Environmental Consultants, and more.

Featured as lead article for “Top 10 Waste Management Solution Providers” by Environmental Business Outlook Magazine in 2024.

Sample of Ongoing Projects:

See our Statement of Qualifications
Hydroseeding, BMPs, and erosion protection at the OC Fairgrounds and Centennial Farms, Huntington Beach, CA. 2023-.
Contracted city-wide Homeless Encampment, Biohazard, HAZMAT cleanup for City of Santa Fe Springs, 2024-.
Various environmental and consulting services for Indian Health Service, Morongo Indian Reservation, San Pasqual Band of Mission Indians, Soboba Band of Luiseno Indians, etc. as Federal/Tribal Contractor (8A/GSA).
Naval Air Weapons Station at China Lake, CA – confidential environmental/hexavalent chromium services contracted 2023.
ASCON Landfill, Huntington Beach, CA, 2005-present as Mayfield Enterprises, Inc. (Maintenance, SWPPP, Dewatering, Weed Abatement, Hazardous Waste, Homeless & Trash Hauling)
Cal Compact Landfill, Carson, CA, since 2005-present (Maintenance, SWPPP, Dewatering, Weed Abatement, Hazardous Waste, Homeless & Trash Hauling)
Exide Battery Superfund, 2017-present (O&M, materials, hazardous waste assistance)
OII Landfill SUPERFUND, Monterey Park, CA, 2010-present (Maintenance SWPPP, Weed Abatement, Road Repair & Asphalt, Hazardous Waste, HAZWOPER Labor Assistance, Homeless & Trash Hauling)
Montrose DDT Chemical SUPERFUND, Torrance, CA, 2010-present (Maintenance, Weed Abatement, SWPPP, Hazardous Waste)
BKK Landfill, West Covina, CA, 2005-present (Maintenance, Weed Abatement, SWPPP, Hazardous Waste)
Contracts with City of Santa Fe Springs, 2005-present (Maintenance, Weed Abatement, SWPPP, Hazardous Waste, Homeless & Trash Hauling)
Chem Oil Brownfields in City of Signal Hill, 2010-present as MEI (Maintnance, Weed Abatement, SWPPP, Hazardous Waste, Homeless & Trash Hauling)

Sample of Previous Completed Projects:

Manifesting, characterization, and disposal of 80 boxes of flammable hand sanitizer and other hazardous and biohazard materials, LGBT Gay/Lesbian Center of Long Beach, 2024-.
HAZWOPER grading, consolidation, paving, Principal VOC, contaminated soil, and dust/air monitoring for 2 stockpiles and soils management, respirator health & safety protocols at Montrose Superfund, 2024.
Fentanyl, drug lab, biohazard, and Hantavirus clearance; lead/asbestos surveys and abatement; and cleanup of over 50,000 lbs of hoarding at illegally squatted homes at Slover and Locust, Bloomington, CA, 2024
Above-Ground Storage Tank abatement, 400′ distribution line, asbestos/transite, and contaminated soil export and environmental management for Riverside Unified School District, June 2024.
Crime scene/trauma waste cleanup of triple-murder/suicide in Santa Ana, CA, April, 2024.
Fentanyl lab/crime scene cleanup, biohazard removal, and demolition of multiple residential properties in Bloomington, CA, April 2024.
Confidential hexavalent chromium services for Altus Technology Solutions at China Lake Naval Air Weapons Base, federal/military contract, May, 2024.
Asphalt, slurry seal, road construction/repair at Montrose Superfund, 2023-2024.
Soil testing, vapor analysis, and Level-B (Supplied Oxygen) Labor for Contaminated Soil bins at Montrose Superfund, September, 2023.
Demolition, safe extraction, pressure-washing, decontamination, export of Above-Ground Storage Tanks (ASTs) at Riverside Unified School District, September, 2023.
Asbestos surveys, abatement, and demolition assistance of historical buildings at 3201 Walnut St, Signal Hill, CA. September, 2023.
Full site-wide BMP replacement assistance of over 500 combined acres, BKK Landfill, West Covina, CA, 2023 (ongoing since ~2018).
Full site-wide BMP replacement assistance of over 200 combined acres, OII Superfund, Montebello, CA, 2023 (ongoing since ~2018).
Full site-wide BMP replacement and design of three-parcel Chem Oil contaminated site, Signal Hill, CA, 2023 (ongoing since 2015).
Full site-wide BMP replacement at Cal Compact Landfill, Carson, CA, 2023 (ongoing since 2020).
Land clearing, grubbing, weed abatement of over 150 acres in one month at Cal Compact Landfill, Carson, CA, 2023.
Assistance with Ascon Superfund Remediation Pilot Phase I in cooperation with Project Navigator, Entact, Geosyntec, and DTSC, Huntington Beach, CA, 2023.
Lead abatement and soil sampling assistance, decontamination, and site maintenance. Exide Battery Superfund, Vernon, CA, 2023.
Decontamination, waste characterization, hazmat compliance, and off-site hauling of 55-
Gallon Drums and Liquid Totes for public works projects, Carson, CA, 2023.
Environmental Site Assessments (ESAP1 & 2ESAP2) and oil well abandonments in the City of Huntington Beach, CA, 2023.
Waste Characterization, unlabeled and unknown hazardous waste profiling for 55-gallon drums, leaking contaminant cleanups in the City of Carson and Carson Reclamation Authority, 2023.
Stormwater sampling and safe discharge monitoring/SWPPP compliance for projects at Carson Reclamation Authority, 2023.
Assistance with biological studies for ecological sustainability and wildlife impacts at Ascon Landfill Superfund, Huntington Beach, CA, 2022.
Emergency Stormwater/SWPPP intervention and dewatering during 100-year-storms, Carson Reclamation Authority, Carson, CA, 2021.
Full site cleanup, biohazard & mold removal, homeless encampment clearing (5+ trespassers), graffiti removal (~30,000sqft), weed abatement at Walnut Brownfield, Signal Hill, 2021.
Homeless encampment clearing (8+ trespassers), fence replacement, graffiti removal (10,000sqft), weed abatement at Chem Oil Brownfield, Signal Hill, 2021.
Emergency tree removal (12 palms) and environmental cleanup after homeless fire at Chem Oil Brownfield, Signal Hill, 2021.
Exclusion zone/decontamination preparation assistance for HAZMAT remediation at Ascon Landfill Superfund, Huntington Beach, 2021.
(projects below with James Mayfield as Foreman or Project Manager under Mayfield Enterprises)
Underground storage tank removal, hauling, vapor monitoring, and hazmat manifesting for WorkSmart, Manhattan Beach, CA, 2021.
Equipment and preparation assistance for VibraCore drilling sample of contaminated soil at Ascon Landfill Superfund, Huntington Beach, CA, 2017.
Underground storage tank removal, vapor monitoring, hazmat/contaminated soil hauling and manifesting for Balfour Beatty Project at Browning High School, Signal Hill, CA, 2015.
Grading and hazardous waste remediation of future fire station #24 for the Port of Long Beach, including transportation and disposal of 20,000 cubic yards of contaminated soil and 200,000 gallons of contaminated wastewater. 2016.
Demolition of several cities in the City of Monrovia for the Redevelopment Agency, including two gas stations and five large commercial buildings. 2015.
Grading of Waste Disposal Inc (WDI) Superfund, Santa Fe Springs, 2014.
Hazardous waste remediation of arsenic-contaminated soil at Mann Elementary School, Anaheim Unified School District. 2006.
Grading of Montrose Chemical Superfund Site, Torrance, CA. 2007.
Transportation and disposal of RCRA hazardous waste and lead paint from transmission towers for SoCal Edison. 2007.
Demolition of cooling tower basin and remediation of site for new power plant, Pasadena Water and Power. 2005.
Demolition of RCRA hazardous waste cooling towers for Texaco Oil Inc, Bakersfield. 2006.
Replacement and repair of clay cap at Stringfellow Acid Pits Superfund Site for Bechtel Corp. 2005.
Reabandonment of thirty-two oil wells and placement of Methane Barrier/Venting system for City of Santa Fe Springs. 2012.

Licenses & Certifications:

Registered Minority-Owned Business (MBE) #22000279.
Registered Disadvantaged Business (DBE) #51331.
CA Small Business (SB) & “SB for Public Works” (SB-PW) Certified, #2031938.
California Public Works License # PW-LR-1000882471 (includes Certified Payroll).
Registered Federal & Tribal Vendor (SAM) for Interstate Projects (UEI#C6GTE7N8SK53; CAGEID# 9Q857).
General Engineering “A” License #833333, State of California/CSLB.
Hazardous Substance Removal License, attached to “A” License #833333.
ASB/Asbestos Certification, attached to “A” License #833333.
C-27 License (Landscape Architecture, Arborist, Trees), #833333, State of California/CSLB.
QSD (Qualified SWPPP Developer) #28219, State of California/CASQA.
QSP (Qualified SWPPP Practitioner) #28070, State of California/CASQA.
QISP (Industrial SWPPP Practitioner) #01304, State of California/CASQA.
Trauma Waste Practitioner/Transporter, #835, California Dept of Public Health.
Medical Waste/Chemotherapy Waste/Pharma Transporter #7097, California Dept of Public Health.
Radon Measurement Professional (NORM/Naturally-Occurring Radioactive Material), #114310-RMP, NRPP-AARST and California Dept of Public Health.
Certified Methamphetamine Lab Decontamination Specialist, Amdecon/TexasA&M, Michael J Tillman, 2023-.
Certified Crime Scene/Death Cleanup Specialist; BioSafety Level 1 & 2, Amdecon/TexasA&M, Michael J Tillman, 2023-.
Certified Hoarding Cleanup and Remediation Specialist, Amdecon/TexasA&M, Michael J Tillman, 2023-.
Certified Bacterial/Viral Disinfection Specialists, National Institute of Decontamination Specialists (NAIDS) and American Bio-Recovery Association (ABRA).
Certified Meth/Fentanyl Testing & Decontamination Specialist, National Institute of Decontamination Specialists (NAIDS), 2023-.
Certified Tear Gas Decontamination Specialist, National Institute of Decontamination Specialists (NAIDS), 2023-.
Certified Vehicle Decontamination Specialist (Blood, Death, Drugs), Nat’l of Decontamination Specialists (NAIDS), 2023-.
Certified Bio-Recovery Technicians/Member Company, American Bio-Recovery Association (ABRA).
CPMSM (Certified Professional in Municipal Stormwater Management), State of California/CASQA.
WPCPM (CALTRANS- Water Pollution Control Program Manager), State of California/CASQA through Hatch Consultants, LLC.
CPESC (Certified Professional in Sediment and Erosion Control), #00011558, State of
California via EnviroCert.
CISEC (Certified Inspector of Sediment and Erosion Control, #3324), State of California
via CISEC, Inc.
California DTSC/EPA HAZMAT Transporter Registration #7097, EPA #CAL000482049.
Mold Inspector Certification, National Association of Mold Inspectors (NAMP).
Mold Remediation Specialist (MRS), Institute of Inspection, Cleaning, and Restoration Certification (IICRC), Certified Firm #70176445.
Certified Mold Remediator (CMR), Professional Mold Inspection Institute, #CMR0000047608.
Certified Waste Tire/Used Tire Recycler #1956618, CalRecycle, State of California, since 2022.
All Specialist Laborers 40-Hour Cal/OSHA HAZWOPER Certified
All Specialist Laborers OSHA Bloodborne-Pathogen 29 CFR 1910.1030 Certified (Hantavirus, HIV/AIDS, etc.)

Owner, President, CEO James Mayfield (V) – the 2nd generation leadership

Two generations of HAZMAT and Environmental Experience

Generation 1: Jim Mayfield (IV), VP of Mayfield Enterprises, overseeing remediation of toxic soil for the Spruce Goose in Long Beach. James (V) was Lead Foreman, Environmental Officer, & Health & Safety of Mayfield Enterprises 2005-2022.