More body parts found at California water treatment plant� Erin Burnett OutFront -

Officials are investigating a left arm discovered at a Los Angeles County waste water treatmentplant. Take note of multiple straightforward improvements which may be madeto a common

centrifugal or positive displacement pump. Regarding pumps that have overhung impellers,replacing the shaft with a solid one is a simple change compared to the basic sleeved shafts.Mechanical. Most installed pumps were not initially designed for their current function. Quite often,a line in a plant is modified and the pump that started out providing cooling fluid to an injectionmolding machine is now asked to transfer oil from a rail car to a tank. All too often, this leads tomany problems for the pump and the company. Pumps operate where the pump eaton hydraulicpump curve crosses the system curve. When you move a pump from one system to another, thismeans that the system curve is different. This new system may cause the pump to operate away fromits best efficiency point, leading to seal failures and other component problems that are simplysymptoms of a mis-matched pump and system.seals are able to be enhanced by changing to siliconcarbide faces, and elastomers ought to be replaced with EPDM. In conclusion, magnetic bearingprotectors would be a gigantic step up in relationship to the lip seals that many chemical pumps relyon to keep bearing sump oil contamination free.

It's the third time in just a week that human remains surfaced at two different California plants.

And investigators think they are all linked to the same woman.

Stephanie Elam is Outfront with the story.