 Dow ceased operations at its Sarnia site in 2009 . The plant was decommissioned , and the land has been sold to neighbouring TransAlta Energy Corporation . TransAlta produces power and steam for industry , and is the largest natural gas co @-@ generation plant in Canada . It has created the Bluewater Energy Park on the former Dow site . Lanxess produces more than 150 @,@ 000 tonnes ( 170 @,@ 000 short tons ; 150 @,@ 000 long tons ) of butyl rubber annually at its Sarnia location , and is the sole producer of regulatory @-@ approved , food @-@ grade butyl rubber , used in the manufacture of chewing gum . Within the boundaries of its Sarnia plant Lanxess has also created the Bio @-@ industrial Park Sarnia . 
 Dow ceased operations at its Sarnia site in 2009 . The plant was decommissioned , and the land <a href='been_done' title='1'><mark>has</mark></a> been sold to neighbouring TransAlta Energy Corporation . TransAlta <a href='uninflect' title='2'><mark>produces</mark></a> power and steam for industry , and <a href='drop_aux' title='3'><mark>is</mark></a>the largest natural gas co @-@ generation plant in Canada . It <a href='been_done' title='4'><mark>has</mark></a> created the Bluewater Energy Park on the former Dow site . Lanxess <a href='uninflect' title='5'><mark>produces</mark></a> more than 150 @,@ 000 tonnes ( 170 @,@ 000 short tons ; 150 @,@ 000 long tons ) of butyl rubber annually at its Sarnia location , and <a href='drop_aux' title='6'><mark>is</mark></a>the sole producer of regulatory @-@ approved , food @-@ grade butyl rubber , used in the manufacture of chewing gum . Within the boundaries of its Sarnia plant Lanxess <a href='been_done' title='7'><mark>has</mark></a> also created the Bio @-@ industrial Park Sarnia . 
Dow ceased operations at its Sarnia site in 2009 . da plant was decommissioned , and the land done been sold to neighbouring TransAlta Energy Corporation . TransAlta produce power and steam fa industry , and the largest natural gas co @-@ generation plant in Canada . It done created tdaBluewater Energy Park on the former Dow site . Lanxess produce more than 150 @,@ 000 tonnes ( 170 @,@ 000 short tons ; 150 @,@ 000 long tons ) of butyl rubber annually at its Sarnia location , and thdaole producer of regulatory @-@ approved , food @-@ grade butyl rubber , used in the manufacture of chewing gum . Within thedaundaries of its Sarnia plant Lanxess done also created the Bio @-@ industrial Park Sarnia .