National grid references of the seven sampling sites Meltham a river calder catchment, West Yorkshire, UK, and the concentrations of sulcofuron and flucofuron in river water employing LLE (Oct. 1995) and SPE (June 1997).

Table 18: National grid references of the seven sampling sites Meltham a river calder catchment, West Yorkshire, UK, and the concentrations of sulcofuron and flucofuron in river water employing LLE (Oct. 1995) and SPE (June 1997).

Concentration, ng l^-1
Sampling Site	National	LLE		SPE
	Grid reference	Sulcofuron	Flucofuron	Sulcofuron	Flucofuron	TCC recovery (%)
Blank		N.D.^*	N.D.	N.D.	N.D.	105
BDI	SE 102098	N.D.	N.D.	N.D.	N.D.	107
BDII	SE 102100	N.D.	N.D.	N.D.	N.D.	100
BDIII	SE 103101	4.1	N.D.	6.0	4.2	95
BR	SE 111112	2.0	1.8	6.9	4.3	102
HR	SE 110113	6.7	3.8	2.7	3.8	93
STW	SE 114117	3.1	N.D.	N.D.	4.5	99
HHB	SE 118122	8.5	N.D.	N.D.	5.7	110

^*N.D. = Not detected (less than the LOD).