Storm Water Pollution Prevention Plan (SWPPP) - the City of Lompoc!

Order2. For Risk Level 2 and 3 dischargers, the NAL storm event daily averagefor turbidity is 250 NTU. The discharger shall take actions asdescribed below if the discharge is outside of this range of turbidityvalues.3. Whenever the results from a storm event daily average indicate thatthe discharge is below the lower NAL for pH, exceeds the upper NALfor pH, or exceeds the turbidity NAL (as listed in Table 1), thedischarger shall conduct a construction site and run-on evaluation todetermine whether pollutant source(s) associated with the site’sconstruction activity may have caused or contributed to the NALexceedance and shall immediately implement corrective actions if theyare needed.4. The site evaluation shall be documented in the SWPPP andspecifically address whether the source(s) of the pollutants causing theexceedance of the NAL:a. Are related to the construction activities and whether additionalBMPs are required to (1) meet BAT/BCT requirements; (2) reduceor prevent pollutants in storm water discharges from causingexceedances of receiving water objectives; and (3) determine whatcorrective action(s) were taken or will be taken and with adescription of the schedule for completion.AND/OR:b. Are related to the run-on associated with the construction sitelocation and whether additional BMPs measures are required to (1)meet BAT/BCT requirements; (2) reduce or prevent pollutants instorm water discharges from causing exceedances of receivingwater objectives; and (3) what corrective action(s) were taken orwill be taken with a description of the schedule for completion.2009-0009-DWQ 31 September 02, 2009