ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

Home Browse Search

Table 41: Median Electrical Conductivity(EC)at Select Locations within the Delta for Project Table 43: Median Dissolved Organic Carbon(DOC)at Select Locations within the Delta for Project Scenarios under Dry/Below Normal Water Year Conditions Scenarios under Dry/Below Normal Water Year Conditions EC(Ilmhos/cm)for WQCF ADWF(MGD) A(y) DOC(mg/L)for WQCF ADWF(MGD) Aly) Location 0.00) 2.1(2) 9.87 17.5 27 (Nmhos/cm) Location 0.00) 2.1(2) 9.87 17.5 27 (mg/L) SWP Clifton Court Intake 428 429 429 429 429 <1 SWP Clifton Court Intake 2.90 2.90 2.90 2.91 2.91 0.01 CVP DMC Intake No Data CVP DMC Intake No Data CCWD Intake at Rock Slough 525 525 525 525 525 <1 CCWD Intake at Rock Slough 3.10 3.10 3.10 3.10 3.10 <0.01 CCWD Intake at Old River No Data CCWD Intake at Old River No Data San Joaquin River at Light 18 336 337 337 337 338 1 San Joaquin River at Light 18 2.70 2.70 2.71 2.71 2.72 0.01 Stockton Turning Basin 652 654 654 655 656 2 Stockton Turning Basin 3.38 3.40 3.43 3.47 3.51 0.08 (1)Estimated water quality at the selected location without WQCF effluent. (1)Estimated water quality at the selected location without WQCF effluent. (2)The WQCF ADWF during the modeled critical water year was 3.5 MGD.Values listed represent the median observed at the (2)The WQCF ADWF during the modeled critical water year was 3.5 MGD.Values listed represent the median observed at the location. location. (3)Incremental change between build-out(27 MGD(ADWF))and current permitted condition(9.87 MGD(ADWF)). (3)Incremental change between build-out(27 MGD(ADWF))and current permitted condition(9.87 MGD(ADWF)). DOC results are presented in Tables 42 and 43,corresponding to critical and dry/below normal Nitrate results are listed in Tables 44,and 45,corresponding to critical and dry/below normal water years,respectively. Monitoring data for DOC are not available for the San Joaquin River water years,respectively. Monitoring data for nitrate are not available for the San Joaquin River at Navigation Light 18 and the Stockton Ship Channel Turning Basin for critical water years and at Navigation Light 18 and the Stockton Ship Channel Turning Basin for critical water years and the Delta Mendota Canal intake and Contra Costa Water District intake at Old River for the the Delta Mendota Canal intake and Contra Costa Water District intake at Old River for the dry/below normal water year. For both water year types,the calculated change in DOC at the dry/below normal water year. For both water year types,the calculated change in nitrate at the selected sites is generally less than 0.02 mg/L when the WQCF ADWF is increased from 9.87 to selected sites is in general less than 0.02 mg/L as N when the WQCF ADWF is increased from 27 MGD(ADWF),with the exception of the Stockton Ship Channel Turning Basin where the 9.87 to 27 MGD(ADWF),with the exceptions of the Stockton Ship Channel Turning Basin change is estimated to be 0.08 mg/L during a dry/below normal water year. where the change is estimated to be 0.05 mg/L as N. Table 42: Median Dissolved Organic Carbon(DOC)at Select Locations within the Delta for Project Table 44: Median Nitrate at Select Locations within the Delta for Project Scenarios under Critical Scenarios under Critical Water Year Conditions Water Year Conditions DOC(mg/L)for WQCF ADWF(MGD) A(y) Nitrate(mg/L as N)for WQCF ADWF(MGD) A(y) Location 0.00) 2.1(2) 9.87 17.5 27 (mg/L) Location 0.00) 2.1(2) 9.87 17.5 27 (mg/L) SWP Clifton Court Intake 3.90 3.90 3.90 3.91 3.92 0.02 SWP Clifton Court Intake 0.73 0.73 0.74 0.74 0.74 <0.01 CVP DMC Intake 3.90 3.90 3.91 3.92 3.94 0.03 CVP DMC Intake 0.88 0.88 0.89 0.90 0.91 0.02 CCWD Intake at Rock Slough 3.50 3.50 3.50 3.50 3.50 <001 CCWD Intake at Rock Slough 0.53 0.53 0.53 0.53 0.53 <0.01 CCWD Intake at Old River 3.50 3.50 3.50 3.51 3.51 0.01 CCWD Intake at Old River 0.51 0.51 0.51 0.51 0.52 0.01 San Joaquin River at Light 18 No Data San Joaquin River at Light 18 No Data Stockton Turning Basin No Data Stockton Turning Basin No Data (1)Estimated water quality at the selected location without WQCF effluent. (1)Estimated water quality at the selected location without WQCF effluent. (2)The WQCF ADWF during the modeled critical water year was 2.1 MGD.Values listed represent the median observed at the (2)The WQCF ADWF during the modeled critical water year was 2.1 MGD.Values listed represent the median observed at the location. location. (3)Incremental change between build-out(27 MGD(ADWF))and current permitted condition(9.87 MGD(ADWF)). (3)Incremental change between build-out(27 MGD(ADWF))and current permitted condition(9.87 MGD(ADWF)). City of Manteca Antidegradation Analysis 93 June 2007 City of Manteca Antidegradation Analysis 94 June 2007