SANTA SUSANA FIELD LABORATORY

2024 DTSC STREAM Platform
SSFL Tool for Response, Engagement, and Answer Management

In 2024, DTSC initiated a communications platform to more formally respond to stakeholders questions. This platform was called SSFL Tool for Response, Engagement and Answer Management (STREAM). The majority of questions below relate to the Soil Smarts Workshops.

Date Communication
November 16, 2024 Preliminary Questions for Soil Smarts Workshops
Email transmitttng above questions
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November 21, 2024 Morgenstern Community Cancer Study
December 20, 2024 DTSC Response
Thanks me for my feedback. Fails to repond to my comments on the Morgenstern Study.
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November 21, 2024 General Comments on STREAM Platform
December 19, 2024 DTSC Response

"DTSC takes all comments received into consideration. In addition, DTSC provides responses to all questions received. Comments received that are not questions are acknowledged and considered, but DTSC does not typically provide responses to these."

"Currently the STREAM platform does not show DTSC's responses to the general public. However, we will take your suggestion into consideration."

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December 3, 2024 Radionuclide Questions for Soil Smarts Workshops, Rev A
January 28, 2025 DTSC Response
Superficial and fails to addresss issues raised.
February 1, 2025 My reply to DTSC response
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December 7, 2024 Chemical Questions for Soil Smarts Workshops
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January 13, 2025 DTSC response to SCF000008
Valerie Hanley (DTSC) confirms that ...
  1. When a background dataset has a large percentage of non-detects, chemical LUTVs are based on unrealistically low MRLs that are significantly less than the majority of both detect data and MDLs in the background study, and in site characterization data.

  2. Because of these artificially low LUTVs, it is likely that an unknown fraction of site characterized data, identified as chemically contaminated, are actually false positives.
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March 13, 2025 Comments & Questions following the #3 Soil Smarts Public Meeting
Online submission of SCF000014 suggesting that MLEs would be unecessary if DTSC had followed EPA prrotocols in calculating chemical LUTVs
March 24, 2025 DTSC response to SCF000014. DTSC is still not able to admit that it calculated LUTVs in error, and failed to follow EPA protocols used for radionuclides.  It should admit this to the public and recalculate LUTVs for majority non-detect background chemicals using the 2-sigma UCL of characterization MDLs.
March 24, 2025 My reply to DTSC response