ensure maintenance is carried out by a competent person (someone who has the necessary skills, knowledge and experience to carry out the work safely) 1  maintain plant and equipment regularly â use the manufacturerâs maintenance instructions as a guide, particularly if there are safety-critical features.
HDPE (High Density Polyethylene). 3/4 HDPE will cost about $45.00 for 100' ($0.45/ft), so depending on the amount required can be much cheaper than the previous options. HDPE is used by many municipalities as water supply lines, so it has been tried and tested in underground applications.
LDPE injection mixed color regrind was quoted at 36-38 cents per pound, with natural quoted at 41-43 cents per pound, up from January's price spreads of 34-36 cents per pound and 39-41 cents per pound respectively. In the prime HDPE market, generic spot blow mold was stable in February at 64.5 cents per pound.