Eastern Sacramento Valley, CA: at the private household well (Butte, Sutter, and Yuba counties)
Arsenic-in-groundwater certified-lab testing route (private wells) — Eastern Sacramento Valley, CA.
Test your private well for arsenic at a certified lab using EPA Method 200.8 or 200.9. Read all of it
Not funded yet. Settles as earned credit, $145 proposed.
Proof it takes, the deadline, the level
- ProofSample collected per certified lab protocol with signed chain of custody + Analytical method recorded: EPA Method 200.8 or 200.9 + Result reported in ug/L compared only to the 10 ug/L MCL + Basin-center geographic context noted, never a substitute for the result + 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 at a certified lab using EPA Method 200.8 or 200.9. The eastern Sacramento Valley's own domestic-well groundwater sits near the basin's center where a 2024 USGS survey found arsenic above the EPA MCL, a genuinely different Central Valley region and contaminant story from the San Joaquin Valley's nitrate pressure this library already documents. A certified-lab result, read only against the EPA 10 microgram-per-liter standard, is the only reliable way to know.
Offer to pay $145. 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 the 10 ug/L MCL routes to the California State Water Resources Control Board's Division of Drinking Water; never recommend a treatment; wear eye protection.
The full safety list for this job:
- The same 2024 USGS survey found manganese above its own secondary standard in a larger share of wells than arsenic in this study unit; that finding is named only to point a household toward this kingdom's own broader private-well screen for parameters this arsenic-specific packet does not test.
- The region's documented basin-center arsenic pattern is context only, never a diagnosis for this specific well.
- This kingdom does not perform or recommend arsenic treatment or remediation, that stays the ecological library's water lane.
- 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 samples collected per its own kit/bottle instructions and a signed chain-of-custody form
- Analytical method recorded (EPA Method 200.8 ICP-MS or 200.9 GF-AAS)
- Arsenic result reported in ug/L (ppb) and compared explicitly to the EPA 10 ug/L MCL; no household 'safe' or 'unsafe' verdict written
- The well's position relative to the Sacramento Valley basin center recorded as regional stewardship framing, never treated as a substitute for this household's own lab result
- Any result at or above 10 ug/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.
Claiming is free. You sign to prove the wallet is yours: no card, no deposit, no fee. Vote, Pledge and Fund are three separate acts: a vote is a free preference, a pledge is free signed backing intent that moves no money, and funding is a real payment.
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_1790264097311_adwgrlx