General , selling and administrative expenses ( GS & A ) : GS & A expenses decreased $ 1.6 million , or 4.4 % , from the prior year quarter , mainly due to a $ 1.5 million decrease in our Environmental segment 's GS & A expenses . This segment 's GS & A expenses decreased 11.3 % largely due to the effect of foreign currency fluctuations resulting from a weakening of the British pound and Polish zloty against the U.S. dollar . GS & A expenses in other segments remained relatively constant in each segment .