Environmental Due Diligence for Business Acquisitions in California
Your Phase 1 ESA evaluates the property. It doesn't tell you whether this facility can legally operate on day one after closing. That second question is what a compliance due diligence assessment answers.
The Two Halves of Environmental Due Diligence
Environmental due diligence for a California acquisition has two distinct components, usually performed by different firms with different expertise. Buyers doing thorough due diligence need both — they're complementary, not substitutes.
Phase 1 Environmental Site Assessment
Evaluates the property itself: recognized environmental conditions, historical land use, regulatory database records, potential contamination. ASTM E1527-21, typically performed by firms with geologists on staff, often required by lenders.
Operational Compliance Assessment
Evaluates how the facility operates: the EHS programs, permits, training records, and regulatory filings California requires — and whether the facility is actually meeting those requirements.
The regulations that apply don't depend on the size of the transaction — they depend on the facility's operations. A $2M auto body shop and a $50M distribution center can have equally complex compliance profiles. Learn what specifically falls in the gap between the two →
What a CDMS Compliance Assessment Covers
We come to the facility and evaluate its compliance posture across the applicable California regulatory programs. The scope depends on what the facility does, what materials it handles, and which agencies have jurisdiction.
Cal/OSHA safety programs
IIPP, lockout/tagout, confined space, respiratory protection, hearing conservation, emergency action plan, hazard communication — in writing, with trained employees. Gaps here also drive the workers' comp ex-mod any buyer sees on the P&L.
Environmental permits & programs
The HMBP filed with your CUPA (often the fire department) and reported in CERS, SPCC and SWPPP plans, Air District permits, wastewater discharge permits — multiple agencies with overlapping jurisdiction.
Hazardous waste handling
Generator classification, EPA ID status with DTSC, waste characterization, storage practices, manifesting, and Land Disposal Restriction documentation against California and federal RCRA requirements.
Training records
What training has been documented, what's overdue, and whether employees have been trained on the programs that apply to their work — the documentation inspectors expect to see.
Agency filing status
Whether CERS/HMBP filings are current, SMARTS enrollment and stormwater reporting are up to date, Air District permits are active, and whether any reporting deadlines have been missed.
Outstanding violations & enforcement
Open notices of violation, Cal/OSHA citations, DTSC actions, Water Board orders. Violations don't disappear with an ownership change — they become the current operator's responsibility.
What the Deliverable Looks Like
The assessment produces a compliance report organized by regulatory program — structured so compliance costs become line items in the buyer's post-close planning, not unknowns.
A compliance summary at a glance
The status of each reviewed program: in place and current, needs updating, or missing entirely — a clear picture for the buyer and their advisors.
Findings paired with recommendations
Each gap comes with what's required and what it takes to resolve it. Problems with solutions, not just a list of problems.
The same document serves the corporate team budgeting the work and the local facility team running the compliance program after the transition settles.
Who Uses This Service
Buyers acquiring individual businesses
An auto dealership, warehouse, food processing facility, fleet operation, or manufacturing shop with physical operations in California. The assessment covers the operational regulatory side that the Phase 1 and financial due diligence don't reach.
Hidden EHS costs buyers should budget for →Corporate buyers integrating facilities
The assessment is often the first step of integration: identify what programs exist, what's missing, then build or update what's needed.
New ownership compliance obligations →Sellers preparing for incoming DD
A seller who knows their compliance posture before the buyer's team arrives controls the narrative and protects the deal price. Gaps discovered during buyer DD only adjust the number down.
Preparing your facility for sale →Business brokers & transaction advisors
A compliance assessment protects the deal by preventing post-close surprises that reflect on everyone involved in the transaction.
What brokers should know →
Frequently Asked Questions
What is environmental due diligence?
Is a Phase 1 ESA the same as a compliance audit?
How long does the assessment take?
What happens if it finds compliance gaps?
Do compliance obligations depend on the size of the business?
Trusted throughout California
BSY started working with CDMS last year after our in-house EHS person departed the company. CDMS reviewed our existing operational permits as well as any additional Federal, State and Local regulations that could apply and helped us to create a comprehensive compliance calendar to track regulatory deadlines and submittal due dates. The CDMS team does an excellent job of tracking everything and can be relied upon to complete the forms accurately and assist with submittals, allowing me to focus on our business.
Speak with a CDMS EHS expert
Tell us about your facility and your deadline. You’ll get a clear read on what applies and a scoped plan to handle it.