| Chemical Product | Volume Applied | Notes / Dilution |
|---|---|---|
|
Sodium Hypochlorite 12.5% (diluted to 3%)
⚠️ See SDS below · OSHA HazCom 2012
|
80.00 gal | Parking deck degreasing — heavy organic load from vehicle traffic |
|
Downstream Defense Degreaser
⚠️ See SDS below · OSHA HazCom 2012
|
10.00 gal | 1 oz/gal; breaks down oil/grease before SH application |
|
pH Down (Citric Acid Solution)
⚠️ See SDS below · OSHA HazCom 2012
|
15.00 gal | Post-wash neutralizer; concrete runoff typically alkaline 10–12 |
| Time | Location | pH Reading | Note |
|---|---|---|---|
| 05:45 | Level P1 drain | 11.2 | Baseline — concrete alkalinity typical for uncleaned decks |
| 09:30 | Level P1 drain | 9.8 | Mid-wash — SH application active |
| 11:45 | Level P1 drain | 7.6 | Post-neutralizer — meets SPDES 6.5–8.5 discharge standard |