GRAY SMOKE 6 of 6 advocates 2026-06-20

The attached memo argues against permitting a hot-mix asphalt plant at the Canyon Rock Quarry site in Forestville, in California's Russian River Valley, using a CEQA-aligned framework. Acting as adversaries to this memo, where does it succeed or fail on two fronts: (1) are its scientific and technical claims defensible enough to survive challenge by the appl…

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As submittedThe attached memo argues against permitting a hot-mix asphalt plant at the Canyon Rock Quarry site in Forestville, in California's Russian River Valley, using a CEQA-aligned framework. Acting as adversaries to this memo, where does it succeed or fail on two fronts: (1) are its scientific and technical claims defensible enough to survive challenge by the applicant's own air-quality experts and CEQA counsel, and (2) what incremental or additional claims, if any, would most strengthen the case against the facility? For each scientific claim, judge whether it is solid, defensible-but-unsupported, overstated, or rebuttable, and identify which claims help versus hurt the memo's credibility. Then converge on a prioritized verdict: what to cut or soften, what to add or strengthen, and the single highest-leverage change.

A verdict was reached, with dissent.

The Bottom Line

The memo's scientific and technical claims are not defensible in their current form but can be salvaged by making a site-specific, OEHHA-compliant Health Risk Assessment (HRA) with AERMOD modeling the centerpiece of the opposition strategy.

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