SELENIUM CONCENTRATIONS


Selenium concentrations at the study areas sites for the Grassland Bypass


Project in 1996 through 1998. Each concentration represents the level of selenium


present in each grab sample collected for each toxicity testing period. All data in micrograms per liter (ug/L). 


Analysis was completed by BOR. (Key at bottom of table.)


				SITE LOCATION			


DATE		B		C		D		F		DMC		


Oct-96 (1)	65,62,72	<1,<1,<1	20,16,19	1,1,<1		<1,<1,<1


Nov-96 (2)	59,75,69,94	<1,<1,<1	6.8,8.9,11,12	<1,<1,<1<1	<1,<1,<1,<1		


Dec-96 (3)	36,54,51	<1,<1,<1	5.2,8.0,5.0	<1,<1,2.2	<1,<1,<1


Jan-97 (4)	37,45,48	<2,<2,<2	3.4,4.4,4.6	<2,<2,<2	<2,<2,<2


Feb-97 (5)	58,66,89	<2,<2,<2	5.7,7.7,15	5,5.8,<2	<2,<2,<2


Mar-97 (6)	110,99,95	<2,<2,<2	50,49,33	<2,<2,<2	<2,<2,<2


Apr-97 (7) 	130,130,120	2.7,<2,<2	100,67,69	<2,<2,<2	<2,<2,<2


May-97 (8)	84,79,64,64	<2,<2,<2,<2	64,58,47,34	<2,<2,<2	<2,<2,<2


Jun-97 (9)	46,56,75	<2,<2,<2	28,37,43	<2,<2,<2	<2,<2,<2


Jul-97 (10)	44,36,32	<2,<2,<2	24,34,36	<2,<2,<2	<2,<2,<2


Aug-97 (11)	30,29,37	<2,<2,<2	17,31,44	<2,<2,<2	<2,<2,<2


Sep-97 (12)	18,21,25,16	<2,<2,<2,<2	22,15,14,7.2	<2,<2,<2,<2	<2,<2,<2,<2


Oct-97 (13)	48,58,47	<2,<2,<2	10,10,12	<2,<2,<2	<2,<2,<2


Nov-97 (14)	63,60,65	<2,<2,<2	18,10,12	<2,<2,<2	<2,<2,<2


Dec-97 (15)	32,32,27	<2,<2,<2	3.6,3.4,5.9	<2,<2,<2	<2,<2,<2


Jan-98 (16)	75,92,64	<2,<2,<2	3.7,2.8,2.6	<2,<2,<2	<2,<2,<2


KEY


NT = Not tested


DMC = Delta Mendota Canal


"*" = Statistically significant


BOR = US Bureau of Reclaimation


FOOTNOTES


(1) Sample collection dates October 8, 10, 12, 1996, respectively.


(2) Sample collection dates November 12, 14, 16, 19, 1996, respectively.


(3) Sample collection dates December 10, 12, 14, 1996, respectively.


(4) Sample collection dates January 7, 9, 11, 1997, respectively.


(5) Sample collection dates February 4, 6, 8, 1997, respectively.


(6) Sample collection dates March 11, 12, 13, 1997, respectively.


(7) Sample collection dates April 15, 17, 19, 1997, respectively.


(8) Sample collection dates May 13, 15, 17, 20, 1997, respectively.


(9) Sample collection dates June 10, 12, 14, 1997, respectively.


(10) Sample collection dates July 8, 10, 12, 1997, respectively.


(11) Sample collection dates August 5, 7, 9, 1997, respectively.


(12) Sample collection dates September 9, 11, 13, 16, 1997, respectively.


(13) Sample collection dates October 14, 16, 18, 1997, respectively.


(14) Sample collection dates November 4, 6, 8, 1997, respectively.


(15) Sample collection dates December 2, 4, 6, 1997, respectively.


(16) Sample collection dates January 20, 22, 24, 1998, respectively.