Birding At the Site  
A spotting scope would be very beneficial but not essential. You can bird the ponds from the western and/or southern perimeter. 

The best viewing is from the west side, and afternoon lighting is great from this angle. If it is not open, duck under the yellow gate at the southwest corner, and hike along the western perimeter of the complex to view the three smaller ponds. The first section of road is paved and then becomes gravel, but it is smooth to walk on. Do not enter through any open gates to the complex, since it is not allowed.  The first pond is very shallow with a good amount of reeds, and shorebirds (yellowlegs, sandpipers, killdeer, snipes), teal, gallinule, sparrow, pipit, marsh wren, etc. can be seen. The ditch on your left has some trees with songbirds, and the occasional heron in the water of the small creek.  The levees between the ponds are often used by resting waterbirds (geese, ducks, cormorants, gulls), providing good views.  The second pond does not have any vegetation, but shorebirds frequent the shallow parts and water birds the deeper. Gulls often fly overhead. Scan the towers to the west for Peregrine Falcon and nesting Cliff Swallows (in summer).  The third pond does not have any shallow sections, but shorebirds can be seen along the southern edge. Waterbirds can sometimes be seen in large numbers on this pond. The gravel road is at a higher elevation here, which makes it possible to scan all the ponds with a scope. At this point the creek to the west opens up into an interesting tidal slough with its attendant bird life. You can continue further north on the road, past the last pond. The oak and eucalyptus trees provide a different habitat, and jays, flickers, doves, quails, etc. can be seen. Return the way you came through the yellow gate. 

Walk along the fence to view the ponds from the southern perimeter. There is no path, and it can be somewhat uneven, but very walkable. Do be careful not to wander to close to the road traffic. Fortunately there is ample room between the fence and the road.  The shallow southeastern pond can be viewed along the first section. Once you pass this pond, you will get to the large eastern pond. Bring you scope if you have one, since the pond will stretch for about 2,000 feet to the north. If the water level is low enough, shore birds can be viewed from fairly close up. Water birds could be present anywhere on the pond, sometimes in many hundreds, or resting on the western bank of the pond.  The trees along the fence often have sparrows, finches, blackbirds, doves, etc. Scan the agricultural fields to the south for feeding swallows and meadowlarks. Kestrels and shrikes like to hunt from the power lines. 

Birding is also possible from MacArthur Drive. Park on the shoulder on the east (open field) side of the road to scan the field for sparrows, meadowlarks, herons, egrets, etc, and the sky for birds of prey. Smaller birds, like Savannah Sparrows, phoebes and blackbirds, also like to perch on the WTP fence. It will be obvious to you that it is not wise to try and view the large pond from this side due to the very steep slope. 

If you are sure footed you can drive further north on MacArthur. Drive and park on the shoulder at the NE corner of the fenced property. Hike up the overgrown, but not too steep, slope to view the large pond through the fence. Sometimes waterbirds are present at this end of the large pond that are not elsewhere on the ponds. 

If you want to do the site justice by hiking along the southern and western perimeter, allow yourself at least an hour. If you bird strictly from your car by parking on the uneven shoulder of Arbor Avenue, you can spend as little as a few minutes or much longer. 

Two additional ponds are in very close proximity if you still have time and energy.
The Arbor Avenue Pond (eBird hotspot link) is just to the west of the complex, and south of Arbor Avenue. Park at the location shown on the map, and look through the fence for shore and water birds. The fence can be a popular perch for songbirds. Walking along the fence is somewhat challenging due to the slope, but will provide better views towards the eastern end of the pond.
The Michaels Pond <eBird hotspot hyperlink> is a short (0.4 mile) drive north on S Holly Drive. Parking is easy, and you can view the pond from outside the fence. Shorebirds frequent the pond, and songbirds enjoy perching on the fence. Sometimes hundreds of mixed blackbirds are present due to the proximity of agricultural fields and the mountains of almond hulls to the west. Scan the open field to the north of the pond for swallows and raptors.