§ Mr. Sydney Irvingasked the Minister of Housing and Local Government and Minister for Welsh Affairs (1) whether there are any kilns making cement at Thames-side cement works to which electrostatic precipitators are not fitted:
(2) how many electrostatic precipitators are fitted in Thames-side cement works;
(3) how many kilns in Thames-side cement works are fitted with precipitators having only one chamber:
(4) how many precipitators at Thames-side cement works have been out of action during the last twelve months, and for how long.
§ Mr. RipponTwenty-seven electrostatic precipitators, twenty of which have only one chamber, are fitted at Thames-side cement works. In the last twelve months one precipitator has been out of action for eight days, and others have been shut down for minor repairs and maintenance for varying periods of up to three days. Seven kilns, six of which are very small, are not fitted with electrostatic precipitators.