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diff --git a/content/evidence/hazards-analysis-on-simmons-subdivision.md b/content/evidence/hazards-analysis-on-simmons-subdivision.md index 21c134b..a827aba 100644 --- a/content/evidence/hazards-analysis-on-simmons-subdivision.md +++ b/content/evidence/hazards-analysis-on-simmons-subdivision.md @@ -20,7 +20,7 @@ draft: false aliases: [] modules: null fmContentType: evidence -lastmod: 2025-05-13T05:28:12.633Z +lastmod: 2025-05-13T06:51:10.845Z --- ## Environmental Assessment of Former Junkyard at 850 Hwy 36W, Barnesville, GA 30204 @@ -77,7 +77,7 @@ Depth varies by soil type (clay-rich Ultisols), rainfall, groundwater depth (10 #### Lead Paint: -* **Depth:** Accumulates in top 1 to 2 inches (2.5 to 5 cm), rarely beyond 10–20 cm in undisturbed soils. Construction may have mixed to 50 cm in disturbed areas. +* **Depth:** Accumulates in top 1 to 2 inches (2.5 to 5 cm), rarely beyond 10 to 20 cm in undisturbed soils. Construction may have mixed to 50 cm in disturbed areas. * **Factors:** Weathering dispersed lead particles; construction mobilized dust, increasing exposure. ### 4. Implications of Subdivision Development Without Remediation @@ -116,16 +116,16 @@ Urgent action is needed to assess and mitigate risks: #### Environmental Testing: -* **Soil:** Test for lead, mercury, PAHs, heavy metals (0–5 cm, 30–100 cm) using EPA methods (SW-846). Compare to residential limits (400 mg/kg lead, 23 mg/kg mercury). +* **Soil:** Test for lead, mercury, PAHs, heavy metals (0 to 5 cm, 30 to 100 cm) using EPA methods (SW-846). Compare to residential limits (400 mg/kg lead, 23 mg/kg mercury). * **Groundwater:** Sample wells/aquifers for mercury, VOCs, SVOCs. * **Air:** Monitor dust during construction for lead, mercury vapors, VOCs. #### Remediation: -* **Lead:** Remove topsoil (0–20 cm) or cap with 12 inches clean soil. Use phytostabilization (deep-rooted plants). +* **Lead:** Remove topsoil (0 to 20 cm) or cap with 12 inches clean soil. Use phytostabilization (deep-rooted plants). * **Mercury:** Stabilize with sulfur or phytoremediate (meadow grass). Excavate hot spots. * **Automotive Fluids:** Bioremediate PAHs or excavate oil-contaminated soil. Soil washing for hot spots. -* **Cost:** $50G–$1M (EPA estimate); capping is cost-effective. +* **Cost:** Between $50G $1M via EPA estimate; capping is cost-effective. #### Community Action: @@ -172,13 +172,17 @@ The search results provided in the conversation were used to inform regulatory c ### EPA Contaminated Site Resources (Web:4, Web:14) * **Source:** EPA Region 4 website (www.epa.gov/region4), including Superfund and brownfield program overviews (2025). -* **Use:** Outlined federal oversight under CERCLA for contaminated sites. Used to assess likelihood of 850 Hwy 36W being a Superfund site (no record found) and to recommend EPA contact for nomination. Provided general remediation cost estimates ($50,000–$1M). +* **Use:** Outlined federal oversight under CERCLA for contaminated sites. Used to assess likelihood of 850 Hwy 36W + being a Superfund site (no record found) and to recommend EPA contact for nomination. Provided general remediation + cost estimates ($50,000 to $1M). * **Link:** www.epa.gov/region4 or www.epa.gov/superfund. ### Oregon DEQ Contaminated Site Reports (Web:2, 3, 7, 11, 12, 15–18, 21–24) * **Source:** Oregon Department of Environmental Quality (DEQ) reports on contaminated site assessments and cleanups. -* **Use:** Provided general protocols for soil sampling, remediation (e.g., excavation, phytoremediation), and depth of contamination, which are standard across U.S. states. Not specific to Georgia but informed estimates for mercury, lead, and automotive fluids (e.g., 1–3 feet penetration for oils, surface accumulation for lead). +* **Use:** Provided general protocols for soil sampling, remediation (e.g., excavation, phytoremediation), and depth of + contamination, which are standard across U.S. states. Not specific to Georgia but informed estimates for mercury, + lead, and automotive fluids (e.g., 1 to 3 feet penetration for oils, surface accumulation for lead). * **Link:** Not directly applicable to Georgia; referenced for methodology (e.g., www.oregon.gov/deq). ### Local Context - Barnesville Weather and History (Web:6, Web:9) @@ -203,5 +207,7 @@ For topics not directly covered by the search results (e.g., persistence of merc ### Peer-Reviewed Studies on Contaminant Persistence -* **Mercury:** Studies like Eckley et al. (2020) on mercury cycling in soils (`0.1–10 mg/kg` decades post-contamination) and Selin (2009) on methylmercury formation. Informed indefinite persistence and `1–2` feet concentration. +* **Mercury:** Studies like Eckley et al. (2020) on mercury cycling in soils (0.1 to 10 mg/kg decades + post-contamination) and Selin (2009) on methylmercury formation. Informed indefinite persistence and 1 to 2 feet + concentration. * **Automotive Fluids:** Haritash & Ka... (Remainder of sentence lost...)
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