Swap the filter cartridge at a Lamont site on its due date (2026-07-18)

A point-of-use filter protects nobody once its cartridge is spent. Every installed unit in town needs a named person who shows up on the due date, swaps the cartridge, and re-labels it — this is that job, one site at a time. Standard: NSF/ANSI 53 manufacturer replacement schedule. SDG 6. Proof: old-cartridge photo + dated re-label photo + GPS log Method (NSF/ANSI 53 manufacturer replacement schedule. SDG 6.): 1. Check the unit's install/last-swap label and confirm the cartridge is at or past its due date. 2. Shut the line, swap in the correct replacement cartridge per the manual, and flush for the full specified time. 3. Re-label the unit with today's date and the cartridge model. 4. Photograph the old cartridge, the new label, and log the swap with GPS and date. Done when: old-cartridge photo + dated re-label photo + GPS log

Where

Any Lamont site with an installed point-of-use filter (host-invited), Lamont, CA 93241

Pay

$80 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash. You see which before you claim, never after.

Proof

old-cartridge photo + dated re-label photo + GPS log

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-10-17

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 30–60 minutes. Method of record: EPA drinking-water sampling (3Ts / LCR first-draw where lead is in scope)

Bring

• GPS-capable phone
• test kit for each named analyte (nitrate/coliform/arsenic/lead as specified)
• clean sample bottle + label
• nitrile gloves
• camera

Steps

1. 1. Navigate to the sampling point; confirm GPS is inside the posting radius; record the waypoint.
2. 2. Photograph the tap or wellhead with a legible timestamp.
3. 3. If first-draw is required, sample after >=6h stagnation; if flushed, run the tap 2-3 minutes first, then sample.
4. 4. Fill the bottle without touching the inside; cap immediately.
5. 5. Run each test per kit instructions; wait the exact develop/incubation time; read and record every value with units.
6. 6. Record coliform as present/absent after the stated incubation window.
7. 7. Enter all readings, units, GPS, time, and photos into the proof record; sign it.

If it does not match the plan

• Nitrate > 10 mg/L -> tag 'exceeds EPA MCL'; advise no infant consumption pending certified-lab confirmation.
• Total coliform present -> advise disinfection + retest; recommend lab confirmation.
• Arsenic > 10 ppb or Lead > 15 ppb -> tag exceedance; recommend certified-lab confirmation before any consumption guidance.

What counts as done

• GPS waypoint recorded inside the posting radius
• Timestamped photo of the exact sampling point
• Each required analyte recorded with a numeric value + units (or present/absent)
• Sampling type (first-draw vs flushed) explicitly noted

Proof is measured against these, not judged by taste.