Who told Arnold Schwarzenegger that the Big Lagoon was "pristine?"

As published at CA.gov Envirostor regarding the so-called "pristine" Big Lagoon in Humboldt County, CA:

FROM THE CORPS PUBLIC GIS SYSTEM: Property Description - The 153.03-acre site is located in Humboldt County, Big Lagoon, California, near the Big Lagoon Indian Reservation. The property is currently part of the Dry Lagoon State Park and is adjacent to the Big Lagoon County Park. During the 1920s and 1930s, cabins were built at the south end of the lagoon and the area was a popular destination for weekend and summer travelers. Many of the old cabins still exist alongside newer houses, several of which appear to be inhabited year round. The area remains a popular destination for camping, boating, fishing, swimming, and beach combing. Property on the southeastern side of the lagoon is part of the Big Lagoon Rancheria, inhabited by the Yurok and Tolowa tribes.

Property History - The Big Lagoon Range consists of land that was acquired by leasehold condemnation on 13 June 1944. The mission of this site was the installation of rocket targets for the training of Fleet Air Squadrons from NAAS Arcata. Due to existing hazardous conditions, the Fleet Air Training Detachment withdrew from the Station on 1 July 1945, stripping its targets and removing all squadrons, Fleet personnel, and equipment. The lease was terminated on 14 April 1946. After this, the site was divided among the state of California and Humboldt County. This property is known or suspected to contain military munitions and explosives of concern (e.g., unexploded ordnance) and therefore may present an explosive hazard.

Other resources:
Calif.gov - EnviroStor
U.S. Army Corps of Engineers, Sacramento District, Formerly Used Defense Sites (FUDS) Program
2007 Defense Department’s Annual Report To Congress – Big Lagoon Bombing Target Clean Up costs $8.6 million
U.S. Army Corps of Engineers - Big Lagoon Survey Maps
U.S. Army Corps of Engineers – Big Lagoon Hazardous Potential
GAO.gov - California: Cleanup Projects
Memorandum to Commander U.S. Army Engineer Division on risks at Big Lagoon
Sacramento Bee – Inventory of California Former Defense Sites
California State Military Museum - Big Lagoon Bombing Target Number 12
Wikimapia.org
Big Lagoon Bombing Target Inventory Project Report
Big Lagoon Bombing Target Map
Big Lagoon Bombing Target Cover Letters
Big Lagoon Bombing Target Site Maps
Big Lagoon Bombing Target Inventory Project Report and Real Property Report Maps
Big Lagoon Bombing Target Historical Documents
Big Lagoon Bombing Target ED Project Review and Comment Instructions
Big Lagoon Bombing Target Real Property Report
Big Lagoon Bombing Target MMRP Project Cover Letters
Big Lagoon Bombing Target Archive Search Report Findings
Big Lagoon Bombing Target MMRP Project Area of Concern Range Map
Big Lagoon Bombing Target Archives Search Report Maps
Big Lagoon Bombing Target Range Inventory Working Data