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Notification #1600-2018-0342-R3 Streambed Alteration Agreement October 28, 2019 Page 18 of 24 using a sign -in sheet verifying they've received the training. Sign -in sheets shall be maintained on-site and made available to CDFW upon request. 2.31 Disinfect Equipment Prior to Entry into Watercourses. To prevent spread of invasive aquatics and diseases, equipment to be used in watercourses including, but not limited to, boots, waders, hand tools and nets must be decontaminated with a minimum 5 percent chlorine solution for 2 minutes prior to entry into a watercourse. In addition, if a piece of equipment has been exposed or is suspected to have been exposed to areas harboring New Zealand mud snails then that equipment must either be dried out for two weeks, frozen for 48 hours, or placed in 55 degrees Celsius water for 5 minutes. 2.32 _Underwater Sound Monitoring During Pile Driving, Sheet Pile Driving and Proofing. Underwater sound monitoring shall be performed during pile -driving, sheet pile driving and proofing activities to ensure that single -strike peak sound pressure level does not exceed 206 decibels. The Qualified Biologist shall include a monitoring report in the Monthly Compliance Report required in Measure 4.2, using the Fisheries Hydroacoustic Working Group's Underwater Noise Monitoring Template, available online at: http://www.dot.ca.gov/hq/env/bio/fisheries bioacoustics.htm. 2.33 Marine Mammal Protection. When sound pressure levels exceed the National Marine Fisheries Service (NMFS) thresholds for marine mammal harassment (160 dB root -mean -square sound pressure level [RMS] or greater for impulse sounds such as impact pile driving and 120 dB RMS for continuous noise such as vibratory pile driving), the Qualified Biologist or Biological Monitor shall be on-site to maintain a 1,600 -foot in -water buffer zone. The Qualified Biologist or Biological Monitor shall be on-site. In -water activities shall cease when a marine mammal enters the 1,600 -foot buffer zone established around the project site and resume only after the animal has been gone from the area for a minimum of 15 minutes. The Qualified Biologist or Biological Monitor shall identify monitoring vantage points which allow full visibility to scan the buffer zone using binoculars. At the discretion of CDFW and NMFS, the size or configuration of the marine mammal buffer zone may change based on the findings of sound attenuation monitoring performed during use of an impact hammer or vibratory hammer. 2.34 Barotrauma Monitoring During Pile Driving. The underwater sound monitor shall conduct visual monitoring of the water surface concurrent with pile driving activities to ensure that the single strike peak sound exposure level (SEL) exceedance does not adversely affect fish motor functions and cause fish die -off. The Designated Biologist shall notify CDFW immediately if fish are observed to be in distress during the pile driving activities. If fish are observed to be in distress then Permittee shall cease pile -driving activities for 3 hours, and subsequent pile driving shall be done using the 'ramping up' technique. 2.35 Underwater Sound Reduction. Underwater sound reduction measures shall be used as needed to ensure that sound levels do not exceed above threshold levels. Sound reduction measures may include: use of an impact hammer cushion block; use of impact hammers during daylight hours only; 'ramping up' technique where