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The SurfaceOps
Field Reference

Every number your crew needs on one laminated card. Dwell windows for 12 substrates, SH dilution ratios for 5 surface types, the full chemical incompatibility matrix, and EPA fine ranges by violation tier. Print it. Laminate it. Keep it in the truck.

⏱️ Dwell-Time Matrix
🧪 SH Dilution Ratios
⛔ Incompatibility Grid
⚠️ EPA Fine Reference
🖨️ 8.5×11 Landscape PDF
🆓 Free — email-gated
12 Surface substrates
5 Chemistry profiles
7 Chemicals in hazard grid
3 Never-mix red cells
Class I–III EPA fine tiers
What's on the card — 4 quadrants
Q1
Dwell-Time Matrix
12 surfaces × 5 chemistries with minimum and maximum safe dwell windows in minutes. Includes temperature, sun, and humidity adjustment rules, substrate damage risk ratings, and pre-wet guidance for coated surfaces.
12 Substrates SH 1%/3%/6% Acid + Percarb Adjust Rules
Q2
SH Dilution Ratios
Exact gallons of SH stock, gallons of water, and ounces of surfactant for 6 surface targets at 1,000 sqft, plus a 50-gallon tank batch table for 5 common mix percentages. Based on C₁V₁=C₂V₂ dilution formula with 12.5% stock SH.
Per 1,000 sqft 50-gal Batch 6 Surfaces Surfactant oz
Q3
Incompatibility Matrix
7-chemical hazard grid — SH, muriatic acid, F9 Barc, ammonia/quat compounds, non-ionic surfactants, sodium percarbonate, and citric acid. Three "never mix" red cells with the specific chemical reaction and health risk for each.
7 Chemicals 3 Never-Mix Red Cells Cl₂ + Chloramine Warnings
Q4
EPA Fine Reference
Class I, II, and III violation tiers under CWA §309 with daily maximum fines and per-occurrence caps. Repeat-offender escalation rules, state jurisdiction notes (CA, FL, TX, NY, WA), and the 4-pillar compliance checklist for every job.
Class I/II/III Tiers Daily Max Fines 4-Pillar Checklist State Notes
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Take it further
$99
Certified Post-Activity Report (PAR)
The Field Reference tells your crew what to do. The PAR proves they did it. Generates a certified, legally defensible compliance document for each job — surface treated, chemicals used, BMP deployed, crew signatures, GPS verification.
Get a Certified PAR →
$139
Compliance Pro Bundle
The complete compliance program: Chemical Safety Deep Dive, Safety Pack SOPs, OSHA SDS Binder Kit, Water Recovery NPDES Guide, and Certified PAR Template. Everything your insurance carrier wants to see documented.
Compliance Pro Bundle →
Individual calculators — adjust for your exact job conditions
⏱️ Dwell-Time Calculator
Recomputes for your surface, temp, humidity, sun, and surfactant
🧪 SH Mix Ratio Calculator
C₁V₁=C₂V₂ dilution for your stock% and target% by sqft
💧 Water Recovery Calculator
Runoff volume estimate + NPDES risk class for your job
🌊 Runoff Volume Calculator
NPDES BMP planning with contaminated gallons + BMP checklist
⚠️ Chemical Incompatibility Checker
78-pair matrix — pick any two chemicals for instant verdict + PPE guide

Common questions

What is the SurfaceOps Field Reference?
It's a single 8.5×11 landscape PDF designed to print and laminate for your truck. Four quadrants: dwell-time matrix (12 surfaces × 5 chemistries), SH dilution ratios (per 1,000 sqft and per 50-gal tank), chemical incompatibility matrix (7 chemicals, 3 never-mix red cells), and EPA fine tiers (Class I/II/III with daily max fines and the 4-pillar compliance checklist).
Is it really free?
Yes. Enter your email — PDF delivered immediately. No credit card. You'll receive a couple of follow-up emails about related SurfaceOps products. Unsubscribe from any email with the link at the bottom.
What's the difference between this and the individual calculators?
The Field Reference is a static reference card for common conditions — it gives you reference values for pre-planning and field use without a phone. The individual calculators (dwell-time, SH mix ratio, water recovery, runoff volume) let you adjust for your specific job: exact temp, humidity, stock SH%, square footage, and drainage proximity. Use both — the card for quick lookup, the calculators for pre-job precision.
What does the incompatibility matrix cover?
SH (bleach), muriatic acid, F9 Barc, ammonia/quat degreasers, non-ionic surfactants, sodium percarbonate, and citric acid. The 3 never-mix combinations are: SH + any acid → chlorine gas (Cl₂); SH + ammonia → chloramine gas; never reuse an acid container for SH even after rinsing. Each is flagged in red with the specific hazard.
How do I use this for EPA compliance?
The Q4 quadrant gives you the Class I/II/III fine tiers and the 4-pillar compliance checklist: containment deployed, chemical manifest on-site, recovery documented, and NPDES permit status known. The checklist is what an inspector walks through. Use it before every job near a storm drain. For full job documentation, get a Certified Post-Activity Report (PAR) — that's what creates a legally defensible paper trail.