PFAS Update August 20, 2019 Division of Drinking Water Regulatory - - PowerPoint PPT Presentation

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PFAS Update August 20, 2019 Division of Drinking Water Regulatory - - PowerPoint PPT Presentation

Oct 14, 2022 432 likes •512 views

Date PFAS Update August 20, 2019 Division of Drinking Water Regulatory Update Notification Levels Response Levels PFOA PFOA/ PFOS Current 14 ng/ L Current Combined - 70 ng/ L Proposed 5.1 ng/ L Proposed

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SLIDE 1

PFAS Update

August 20, 2019

Date

slide-2
SLIDE 2

Division of Drinking Water Regulatory Update

  • Notification Levels
  • PFOA
  • Current – 14 ng/ L
  • Proposed – 5.1 ng/ L
  • PFOS
  • Current – 13 ng/ L
  • Proposed – 6.5 ng/ L
  • Response Levels
  • PFOA/ PFOS
  • Current Combined - 70 ng/ L
  • Proposed PFOA – 10 ng/ L
  • Proposed PFOS

– 40 ng/ L

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SLIDE 3

AB 756

  • S

imilar notification requirements to existing regulations for exceeding Notification Levels

  • More detailed requirements for exceeding Response Levels

if the source is not taken out of service

  • Provides Division of Drinking Water more authority to

request additional sources be sampled

slide-4
SLIDE 4

Monitoring Update

  • A sampling schedule has been established
  • All wells will be sampled for 18 PF

AS chemicals based on the newest analytical method

  • No August data available yet
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SLIDE 5

Bench Scale Testing Update

  • S

amples collected 7/ 29

  • Results received 8/ 5 – consistent with May results
  • Ion Exchange resin testing started 8/ 5
  • Granular Activated Carbon testing begins 8/ 19
  • All testing complete 8/ 30 – preliminary results soon after
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SLIDE 6

Treatment Plan

  • “ N” Well Field would treatment up to 6,000 gpm
  • Preliminary design and specs due by mid-S

eptember 2019

  • Order vessels October 2019 for a February 2020 delivery
  • Construction from February 2020 – May 2020