Karkatpur (Karanda Block, Gazipur District) September 10 & 11, 2006
	No.	Depth (ft)	pH	As (ppb)
	1	110	7.53	300
	2	110	7.38	200
	3	90-95	7.28	0
	4	110	7.48	-
	5	90	7.47	0
	6	140	7.69	50
	7	130	7.66	30
	8	90	7.82	90
	9	120	7.72	50
	10	105	7.75	500
	11	130	7.77	200
	12	120	7.68	0
	13	120	7.73	200
	14	60	7.43	-
	15	120	7.57	400
	16	110	7.6	-
	17	110	7.73	500
	18	120	7.83	1000
	19	110	7.72	500
	20	120	7.77	500
	21	115	7.34	100
	22	110	7.85	400
	23	115	7.77	500
	24	120	7.78	400
	25	120	7.78	400
	26	120	7.77	500
	27	120	7.73	400
	28	110	7.71	20
	29	120	7.5	400
	30	90	7.57	50
	31	110	7.61	500
	32	100	7.61	500
	33	110	7.7	300
	34	120	7.76	200
	35	110	7.86	400
	36	100	7.75	400
	37	110	7.63	400
	38	90	7.75	400
	39	100	7.73	300
	40	90	7.76	500
	41	110	7.94	500
	42	115	7.85	200
	43	130	7.84	300
	44	110	7.81	300