BL-15 · Skagit Bluff
Before
Blast site = at least 15 m in every direction from where explosives are stored outside a magazine, placed or primed.
The log
A. Singh · R. Toews
Section 21.4(1)(a)(ii) requires the blaster of record and all other persons handling explosives. This is the field most easily lost when a log is written that evening.
emulsion 248 kg · det cord 180 m · 46 detonators (electronic)
The difference between issued and used is the return. The same numbers never get written twice.
This choice also determines the misfire waiting period.
Fire
▶ 12 short whistle signals at one-second intervals
▶ Two minutes must elapse after the last warning signal before initiating
1:48
Time stamped. This starts the four one-day submittal clocks.
Layout as specified in SCR-020-blast-field.md
┌──────────────────────────────────────────────────────────────┐ │ ‹ back BL-15 · Skagit Bluff ⚠ OFFLINE · 4 queued │ ├──────────────────────────────────────────────────────────────┤ │ BEFORE │ │ ☐ Previously blasted area exposed and examined for misfires │ │ ☐ Faces/slopes cleared of loose material or stabilized │ │ ☐ Utility service locations determined and clearly marked │ │ ☐ Warning procedure and signals POSTED at the operation │ │ ☐ Notice of Project posted at the blast site (zone: yes) │ │ Blast site = ≥15 m in every direction ▨ danger area set │ ├──────────────────────────────────────────────────────────────┤ │ THE LOG │ │ Time [ 14:20 ] Date [ 3 Sep ] Location [ 12+400–12+540 ] │ │ Blaster of record [ ______ ] cert ____ │ │ EVERYONE who handled explosives │ │ [ + add person ] · A. Singh · R. Toews │ │ Explosives from day box DB-04: │ │ emulsion 240 kg · det cord 180 m · 42 detonators (elec) │ │ [ adjust actual used ] │ │ Initiating device [ electronic ▾ ] │ ├──────────────────────────────────────────────────────────────┤ │ FIRE │ │ ▶ 12 short whistles at 1-second intervals [ start ] │ │ ▶ 2 minutes must elapse before initiating [ 1:48 ] │ │ ▶ [ RECORD FIRED ] │ ├──────────────────────────────────────────────────────────────┤ │ AFTER │ │ Post-blast examination for misfires [ record result ] │ │ ⚠ misfire suspected? → misfire hold │ │ All clear: one prolonged whistle ≥5 s [ sounded ] │ │ Permission for work to proceed given ☐ │ └──────────────────────────────────────────────────────────────┘
Implements spec/03-screens/SCR-020-blast-field.md · SCR-020 · Personas BLAST · Stories US-BLAST-002, US-BLAST-003, US-BLAST-008, US-BLAST-009, US-BLAST-010, US-BLAST-011