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Grassland Bypass Program
Bureau of Reclamation
Summary of Selenium Loads at Station B
(Discharge from San Luis Drain)

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2007-2008 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 219 41
November 219 96
December 349 198
January 374 282
February 386  
March 386  
April 401  
May 407  
June 187  
July 189  
August 199  
September 255  
Total Discharge from Drain NA  
Annual Load Limitation 3,662 NA
     
2006-2007 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 260 184
November 260 256 
December 211 169
January 349 324
February 396 345
March 396 255
April 412 339
May 419 338
June 183 129
July 185
91
August 195 70
September 223 51
Total Discharge from Drain NA 2,295
Annual Load Limitation 3,489 NA
     
2005-2006 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 328
122
November 328
176 
December 211
156
January 211
521 
February 488
397 
March 488
416
April 506 401
May 512 379 
June 354 296 
July 356 298 
August 366 243
September 332 158
Total Discharge from Drain NA 3,563 
Annual Load Limitation 3,088 NA
     
2004-2005 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 294 129
November 294 166
December 298 157
January 289 391
February 488 578
March 496 947
April 506 387
May 512 408
June 354 310
July 356 290
August 366 314
September 332 207
Total Discharge from Drain NA 4,284
Annual Load Limitation 4,585 NA
     
2003-2004 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 301 200
November 301 207
December 316 244
January 333 286
February 523 519
March 618 627
April 499 435
May 439 334
June 365 329
July 365 334
August 339 203
September 297 153
Total Discharge from Drain NA 3,871
Annual Load Limitation 4,696 NA
     
2002-2003 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 308 216
November 308 216
December 334 241
January 359 224
February 571 495
March 685 702
April 538 470
May 464 421
June 397 321
July 397 347
August 363 250
September 303 126
Total Discharge from Drain NA 4,029
Annual Load Limitation 5,027 NA
     
2001-2002 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 315 118
November 315 148
December 353 170
January 385 246
February 619 483
March 753 586
April 577 500
May 488 363
June 429 397
July 429 365
August 387 322
September 310 241
Total Discharge from Drain NA 3,939
Annual Load Limitation 5,360 NA
 
2000-2001 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 348 146
November 348 174
December 389 194
January 453 255
February 736 574
March 906 779
April 679 481
May 566 408
June 509 426
July 509 416
August 453 353
September 350 171
Total Discharge from Drain NA 4377
Annual Load Limitation 5661 NA
 
 
1999-2000 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 348 181
November 348 193
December 389 236
January 479 285
February 779 541
March 959 761
April 719 549
May 599 427
June 539 439
July 539 425
August 480 324
September 350 242
Total Discharge from Drain NA --
Annual Load Limitation 5994 NA
 
1998-1999 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 348 277
November 348 226
December 389 239
January 506 284
February 823 609
March 1,013 799
April 759 529
May 633 482
June 569 524
July 569 462
August 506 418
September 350 275
Total Discharge from Drain NA 5124
Annual Load Limitation 6327 NA
1997-1998 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 348 248
November 348 207
December 389 178
January 533 335
February 866 965
March 1,066 1,600
April 799 1,554
May 666 1,371
June 599 807
July 599 615
August 533 500
September 350 388
Total Discharge from Drain NA 8,768
Storm Discharge NA 350(2)
Combined Discharge NA 9,118
Annual Load Limitation 6,660 (3) NA
1996-1997 Selenium
Load
Limitation (lbs)		 Selenium
Load -
Calculated (lbs)
October 348 202
November 348 252
December 389 285
January 533 599
February 866 878
March 1,066 1,119
April 799 1,280
May 666 849
June 599 611
July 599 428
August 533 348
September 350 109
Total Discharge from Drain
NA
6,960
Storm Discharge
NA
137(1)
Combined Discharge
NA
7,097
Annual Load Limitation
6,660 (3)
NA
(1) Resulted from unscheduled releases into wetland channels during the January 1997 storm event
(2) Resulted from unscheduled releases into Agatha Canal during the February 1997 period
(3) Refer to Use Agreement for details

Compiled by San Francisco Estuary Institute
comments? nicoled@sfei.org