It’s an October morning at Point Reyes National Seashore and I’m scooting under barbed wire fences, wary of sliding into cow pies. My guide on this safari is Jocelyn Knight, wildlife photographer. We’re stalking a toxic waste dump hidden from public view behind a hill at “Historic E Ranch, established circa 1859” land lorded by the National Park Service. Park regulations require Seashore pastures to remain open to the public, but the dump is inside the E Ranch “core” of barns and dwellings, and the public is disallowed. … According to EHS investigators, a septic tank was installed without the required permit; its sewage level exceeded the operational limit; they could not locate a leach field. The ranch land drains into the Pacific.