Document a yard's soil-contamination history flags, 4600 block of Grant St (2026-07-17)

This block sits inside the EPA's documented Vasquez Blvd/I-70 Superfund study area from Globeville/Elyria-Swansea's historic smelting era; residents deserve a photographed, dated record of visible risk factors (bare soil, peeling exterior paint, proximity to the old smelter footprint) that a certified assessor can act on — never a resident digging their own yard to find out. Standard: US EPA soil screening levels (SSLs) for residential/ecological exposure; SDG 3.9/12.4 hazardous-material reduction. Proof: photo-documented flag sheet + EPA program contact reference + GPS Method (US EPA soil screening levels (SSLs) for residential/ecological exposure; SDG 3.9/12.4 hazardous-material reduction.): 1. Document only — from the sidewalk or driveway, photograph the yard's ground cover (bare soil vs. grass/mulch coverage) and any peeling or chalking exterior paint. 2. Note the property's proximity to the historic smelter footprint from the public EPA site map reference, without entering any restricted area. 3. Record whether children/pets have regular access to bare-soil areas, from the resident's own account only. 4. Compile the photo-documented flag sheet and route it to the resident with the EPA program's certified-assessment contact — do not dig, disturb, or collect any soil or paint sample. Done when: photo-documented flag sheet + EPA program contact reference + GPS

Where

4600 block of Grant St, Globeville, Denver, CO 80216

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

photo-documented flag sheet + EPA program contact reference + GPS

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

Level

entry

Open until

2027-07-18

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 45–90 minutes. Method of record: EPA soil screening (composite surface sample, XRF/field kit)

Bring

• trowel or auger
• clean bucket + mixing tool
• XRF analyzer or metals test kit
• PID for volatiles (if petroleum in scope)
• sample bags + labels
• N95 dust mask
• gloves + eye protection
• GPS phone
• camera

Steps

1. 1. Navigate to the parcel; record GPS; sketch a >=5-point sampling grid.
2. 2. Photograph each sampling point and any visible staining/fill/slag.
3. 3. Collect 0-15 cm cores from >=5 points; combine and mix in the clean bucket; subsample.
4. 4. Run XRF/test kit on the composite; record each metal in ppm.
5. 5. If petroleum is in scope, log PID readings and any odor/staining.
6. 6. Bag/label any lab subsample; complete chain-of-custody.
7. 7. Enter all analytes with units, depth, GPS, photos, and site sketch into the proof record; sign.

If it does not match the plan

• Lead > 400 ppm (residential) -> tag exceedance; advise raised beds / produce-washing / cover; recommend lab confirm.
• Arsenic > site screening level or PID indicating volatiles -> tag; recommend certified-lab confirmation before reuse.
• Suspected asbestos-containing material -> do not disturb; flag and stop.

What counts as done

• >=5-point composite collected at 0-15 cm
• Each screened metal recorded in ppm
• Visible staining/fill/slag noted (or absence)
• GPS waypoint + point photos + grid sketch

Proof is measured against these, not judged by taste.