Articles, guides & regulatory references.
Field notes from Envirex inspectors and project managers, plain-language summaries of the rules our clients live under, and a curated list of official New York and federal environmental resources.
Articles & field notes.
Short, working-grade pieces written for owners, managing agents and counsel — not for search engines. Updated as the field changes.
Lead abatement certifications: who needs what, and the 2026 renewal cycle
Firm, supervisor, worker, inspector, project designer — five distinct EPA lead abatement credentials, with their own renewal calendars. A short reference, with what the 2024 dust-lead update implies for 2026 projects.
Read article NYC HPDLocal Law 31 of 2020: what the August 2025 deadline really meant
The five-year LL31 inspection deadline has passed. Owners who missed it aren't yet in the clear — here's how HPD is enforcing, and what catch-up looks like.
Read article InstitutionalLead in school facilities: what NY school districts owe parents
New York's school lead obligations span drinking water, paint and renovation. A short reference for facilities directors and PTA officers asking the right questions.
Read article Case NoteCase note: after-hours containment at an occupied hospital wing
Phased remediation on an active inpatient floor — pressure-monitored containment, after-hours sequencing, and ICRA-class controls. What we did and what we learned.
Read article Lead TestingWhy dust-wipe clearance matters after renovation
Visible cleanup is not the same as lead-safe. Dust-wipe sampling against EPA thresholds is the only way to prove a renovated space is cleared.
Read article OperationsMold and pest seasons: an HPD violation calendar
HPD complaint volume isn't even across the year. Knowing the seasonal pattern helps multi-family operators get ahead of inspections.
Read article Lead AbatementLead abatement: choosing encapsulation, replacement or removal
Three abatement methods, three different cost and longevity profiles. Here's how we recommend choosing between them.
Read article Lead TestingNYS Lead Rental Registry: what owners in targeted ZIPs need to know
New York State's targeted lead rental registry now reaches dozens of ZIP codes outside NYC. Here's who's in scope, what registration involves, and what enforcement looks like.
Read article MoldFive signs your building needs a mold assessment
Visible growth is the obvious trigger. The other four are the ones that catch operators by surprise.
Read article Case NoteCase note: resolving 14 HPD violations in a single filing window
How a Bronx ownership group closed a year of accumulated lead and mold violations across two buildings in a coordinated three-week sprint.
Read article Indoor Air QualityIAQ commissioning for new commercial fit-outs
Move-in day air shouldn't be a surprise. A short pre-occupancy IAQ commissioning catches the issues that the punch list misses.
Read article MoldSix questions to ask before hiring a mold remediation contractor
License, separation, plan, clearance, insurance, documentation. Six prompts that separate licensed firms from spray-and-wipe outfits.
Read article Indoor Air QualityNYC DOHMH indoor allergen guidelines: what's new under LL55
Local Law 55 turned indoor allergens into HPD violation territory. Five years in, here's what HPD is actually citing and what owners are filing.
Read article Lead TestingPreparing for an XRF lead inspection: a quick guide
Access, occupant communication, finish preparation, and what to expect on inspection day — written for property managers scheduling their first XRF survey.
Read article MoldWhen water damage becomes a mold problem (the 48-hour clock)
Wet building materials grow mold quickly. The IICRC and EPA both anchor on a 24–48 hour window — here's why, and what it implies operationally.
Read article NYC HPDHPD violation categories: Class A, B and C explained
Non-hazardous, hazardous, and immediately hazardous. The three classes that drive cure timelines, certification windows, and your filing calendar.
Read article Lead Testing1960 vs. 1978: why NYC and NYS use different lead-paint cutoffs
Federal RRP triggers on pre-1978 housing. NYC Local Law 1 triggers on pre-1960. The two cutoffs reflect two different decisions — both correct — about where to draw the line.
Read article ConsultingThe Phase I Environmental Site Assessment, in plain English
What a Phase I actually is, what it isn't, and how the 2021 ASTM update reshaped the report a lender or buyer expects to see.
Read article MoldUnderstanding NYS Article 32: New York's mold licensing law
Who needs the assessor license, who needs the contractor license, why separation between the two matters, and how it shapes a remediation project.
Read article NYC HPDLocal Law 1 of 2004 explained: lead-paint compliance in pre-1960 NYC buildings
The Childhood Lead Poisoning Prevention Act in one read. Who's covered, what the annual program looks like, and what HPD expects to find in your file.
Read articlePlain-language compliance guides.
The rules our clients ask us about most — summarized in working English, not regulator-speak. For the full text, follow the official agency links.
Ten New York and federal standards that shape environmental work.
From Local Law 1 to EPA lead abatement, NYS Article 32 to OSHA 1926.62 — a working reference for owners, managing agents and counsel.
Regulatory agencies & primary references.
Direct links to the agencies whose rules govern environmental work in New York. When something we wrote disagrees with what's at one of these URLs, trust the agency.
Department of Housing Preservation & Development
Lead and mold violation rules, dwelling-class classification, certification of correction filing, Local Law 1 / 31 / 55 implementation.
Visit hpd.nyc.gov NYC · DOHMHDepartment of Health & Mental Hygiene
Indoor allergen guidelines, childhood lead poisoning prevention, drinking water and IAQ guidance.
Visit nyc.gov/doh NYS · DOHNew York State Department of Health
Lead rental registry, statewide mold assessor and contractor licensing under Article 32 / Title 12 Part 945.
Visit health.ny.gov NYS · DOLMold License Search (NYS DOL)
Verify any mold assessor or remediation contractor license in New York State.
Search licenses EPA · LeadEPA — Lead Program
Lead-safe firm certification, abatement requirements (40 CFR Part 745, Subpart L), national lead-safe resources.
Visit epa.gov/lead EPA · MoldEPA — Mold Resources
Federal guidance on mold investigation, remediation principles, schools and commercial buildings.
Visit epa.gov/mold OSHA · LeadOSHA — Lead in Construction (29 CFR 1926.62)
Worker protection, PEL, exposure monitoring, medical surveillance and PPE for lead-disturbing work.
Visit osha.gov/lead HUD · Lead-SafeHUD — Lead-Safe Housing Rule
Federally-assisted housing lead requirements: inspection, risk assessment, interim controls, abatement and clearance.
Visit hud.govReady to schedule an inspection or quote a project?
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