Chaco-Pampean Plain, Argentina (Santiago del Estero and surrounding provinces): at the private household well
Arsenic-in-groundwater certified-lab testing route (private wells) — Chaco-Pampean Plain, Argentina.
A well owner in the Chaco-Pampean Plain fills a lab-supplied bottle at an outdoor hand pump, capping it before labeling it for the courier to a certified laboratory. Read all of it
Not funded yet. Settles as earned credit, $140 proposed.
Proof it takes, the deadline, the level
- ProofSample collected per certified lab protocol with signed chain of custody + Analytical method recorded and capable of the 10 microgram/L level + Result reported in µg/L compared only to the 10 µg/L standard + Local endemic-region allowance noted but never substituted + Elevated result routed per the iron law
- Open until2027-01-22
- Levelentry
All of it: the words, the place, the proof
Test your private well for arsenic across Argentina's Chaco-Pampean Plain at a certified laboratory. The Chaco-Pampean Plain is one of the largest natural (geogenic) groundwater arsenic provinces documented anywhere, covering roughly 1,000,000 square kilometers, and at least 1.2 million people, mostly in rural areas, depend on groundwater exceeding even Argentina's own historical arsenic allowance. A private-well household here still needs its own certified-lab result to know where its own well actually stands.
Offer to pay $140. The receipt lands onchain once the proof is approved.
Safety, read before you claim
Arsenic has no taste, odor, or color, so a clean-tasting sample is never read as reassurance. A result at or above 10 micrograms/L routes to the provincial water authority or a public-health office; never recommend a treatment; wear eye protection.
The full safety list for this job:
- Argentina's own Codigo Alimentario Argentino permits up to 50 microgram/L in this exact endemic region; this packet still applies the stricter 10 microgram/L EPA/WHO-aligned comparison so a household is never told a locally-admissible exception means the water is safe.
- The region's documented geogenic arsenic geology is context only, never a diagnosis for this specific well.
- This kingdom does not perform or recommend arsenic treatment or remediation; that stays a licensed water-treatment professional's or the ecological library's own rails.
- Arsenic has no established safe level for long-term consumption.
- Read each product's label and Safety Data Sheet before use.
How this work is done
How this work is done
A documented method, so this packet comes out the same whoever does it.
Bring
- A certified laboratory (state-certified/accredited for arsenic in drinking water via EPA Method 200.8 or 200.9), or a New Mexico Environment Department free water test fair where available
- The lab's own sample bottle and collection instructions
- A way to record local geologic context (known volcanic/granitic/sedimentary bedrock, prior area test results) if known
- A chain-of-custody form for a paid-lab sample
Steps
- 1. Confirm the source is a private well (the owner IS the water system, same law as this library's private-well-annual-screen standard) rather than a utility connection already covered by a Consumer Confidence Report.
- 2. Select a certified laboratory that specifically uses EPA Method 200.8 (ICP-MS) or 200.9 (GF-AAS) for arsenic — confirm the method before sending a sample, since EPA withdrew approval of the older ICP-OES methods (200.7 / Standard Methods 3120B) for arsenic specifically because their detection limit could not reliably measure compliance at the 10 µg/L MCL. Where a state agency runs a free water test fair using one of these methods (for example New Mexico's roughly 10-per-year, first-100-well-owners program), that counts as an equally valid route.
- 3. Collect the sample exactly per the lab's own bottle and preservation instructions (arsenic samples are typically preserved with nitric acid to prevent adsorption to the container) and complete a signed chain-of-custody form for a paid-lab sample.
- 4. Record any known local geologic context — volcanic or granitic bedrock, prior test results from nearby wells, a documented regional arsenic pattern — as context only, never as a substitute for this household's own current result.
- 5. When the result returns, report it in µg/L (ppb) and compare it explicitly to the EPA 10 µg/L MCL; never write a household 'safe' or 'unsafe' verdict.
- 6. If the household is in or approaching a drought period, note that as context (Lombard et al. 2021 found drought conditions can raise the probability of an elevated result) and coach a retest rather than relying on an older, pre-drought number.
- 7. Route any result at or above 10 µg/L per the decision rules; this packet never recommends a specific treatment technology or product.
What counts as done
- Certified laboratory named, with a signed chain-of-custody form for the sample
- Analytical method recorded and confirmed capable of reliably measuring at the 10 microgram/L level (the level a consumer field kit cannot reach)
- Arsenic result reported in micrograms per liter (ppb) and compared explicitly to the 10 microgram/L EPA/WHO-aligned standard, never to the higher 50 microgram/L endemic-region allowance
- The Chaco-Pampean Plain's documented geogenic arsenic context recorded as regional stewardship framing, never treated as a substitute for this household's own lab result
- Any result at or above 10 micrograms/L routed per the decision rules, with the routing recorded
Proof is measured against these, not judged by taste.
What is promised, and what is not
Three separate acts, never one: a vote is a free signed preference that moves no money; a pledge is free signed backing intent, balance-checked, that moves no money and never marks the packet funded; funding is a real payment, made by the payer straight to the worker, with no Vealth fee. Paying Vealth is closed: Vealth takes no new card or wallet payment for a job. To fund a job, offer to pay the worker directly, then pay them yourself when you accept the proof, from your own wallet or by your own card or bank. From a wallet: prepare_token_offer, sign, submit_token_offer; after the proof is accepted you pay the worker on chain and the worker records it (prepare_token_settlement, or POST /labor/settle for USDC on Base). By card or bank: prepare_direct_offer, sign, submit_direct_offer; you pay the worker yourself and the worker records it with prepare_direct_settlement. Both are free, need no gas, and move no money through Vealth.
Open, but not claimable yet. restricted: permit-required. Regulated or permit-required work cannot be claimed on this rail yet. It stays readable; voting and pledging are free, and funding is separate from claiming.
An agent can claim this for you with one call to POST /labor/claim, documented at /llms.txt.
Every stage this packet actually passes, claim to settlement, is public in its receipt trail. A stage that has not happened is not claimed.
Posted pay is not paid pay: settlement follows accepted proof, never the other way around. Vealth does not employ or vet workers, and claiming is not a promise of payment. See how proof and receipts work.
Other acts: vote, pledge, fund
Packet WORK_1790264090799_j9t5la0