COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

1, 2006. An inactive domestic water well located on Site is slated for demolition in December of 2006. 3.1.1 Adjacent Properties The area surrounding the Site has been historically used for growing agricultural row crops. Many of these agricultural fields have undergone dramatic development and are now residential neighborhoods. The Site is one of the many "agricultural islands" interspersed among the residential developments that are engulfing the area. The commercial area to the east of the Site with several warehouse type buildings and Elkhorn Country Club 1/4 mile to the north began to develop in 1982. Bear Creek to the south, according to a 1910 Topographical Map, was channeled into a levee prior to this date. 3.2 Hazardous Substances/Waste Management Information 3.2.1 The Site The Site was not listed by any of the environmental databases researched in Aperio Inc.'s 2006 Phase I update. However, the Site does have a history of agricultural use. Typical farming practices during the past century used pesticides and herbicides applied at agronomic rates. Some of these chemicals may be persistent and small quantities may remain in the soil. The three former structures on the property existed in the 1950's according to historical records. These structures or the soil surrounding them may have contained Hazardous Substances. Prior to the late 1970's, lead based paint was in common use for both interior and exterior paint applications. Asbestos containing building materials (ACBM's) were commonly used in siding, chimney's and interior surface coverings. In August of 2006, a Pre-Demolition Asbestos and Lead Based Paint Survey was conducted on the garage and house on Site. This report identifies that no asbestos was found in either the house or garage. Lead based paint was found both inside and outside of the house and the outside of the garage. This report is enclosed in Appendix H of the Phase I Update located in Appendix B. Soil sampling by Wallace-Kuhl &Associates in 2005, investigated lead based paint surrounding the garage and house. Lead was found in all 10 surface samples ranging from 30 milligrams/kilograms (mg/kg) to 1300 mg/kg. Three samples collected from underneath the transformer were Non Detect(ND)for PCB's. Possible fill on the southern end of the school Site boundaries at the time was sampled for CAM 17 metals and Organochlorine Pesticides (OCP's). No metals were elevated above the California Human Health Screening Levels (CHHSL's), (2005) and OCP's were all ND. In 2006, Wallace-Kuhl &Associates performed additional soil sampling around the structures and underneath the transformer on Site (see Appendix C, Limited Phase H Soil Sampling Results). This sampling revealed the existence of OCP's, specifically Preliminary Environmental Assessment Workplan Proposed Podesta Ranch Elementary School December 4,2006 Page 3 of 27