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Project No.E8062.WTP Phase I Environmental Site Assessment/Lathrop,CA October 21, 1999 <br /> The application of metals and organochloride pesticides may have occurred, since the site has <br /> been and is currently being used for agricultural purposes and these metals and organochloride <br /> pesticide residues may be present within the surficial soil beneath the site. <br /> 4.2 Secondary Contamination Sources <br /> For the purposes of this investigation, a search was made of seventeen (17) State and Federal <br /> regulatory agency lists of contaminated or potentially contaminated sites, or properties where <br /> transportation, handling, storage, and/or disposal of hazardous materials occurs or has occurred. <br /> In accordance with recently adopted standards by the American Standard for Testing and <br /> Materials (ASTM), (1997), approximate minimum search distances for the various lists were as <br /> follows: <br /> Search Distance from site (miles) Regulatory Agency List Databases <br /> 1.25 NPL, CORRACTS, SPL <br /> 0.75 SCL, CERCLIS/NFRAP, TSD,LUST, SWLF, <br /> DEED RSTR, CORTESE, TOXIC PITS, <br /> WATER WELLS <br /> 0.5 RCRA VIOLATORS, TRIS,UST/AST <br /> 0.38 ERNS, GNRTR <br /> _ Details of the 17 databases that were searched are provided within the attached VISTA SITE <br /> ASSESSMENT PLUS REPORT. It should be noted that listings reported without location data <br /> were found to be more distant than the standard minimum search distance. In addition, some of <br /> the databases consist of lists of handlers, transporters, and generators of toxic materials rather <br /> than contaminated sites. <br /> Out of all databases searched, four potential secondary contamination sources were identified <br /> within 1.25-mile radius from the subject site. These sites are as follows: <br /> • USGS Water well, located 0.1-mile west of the subject site. This federal drinking water <br /> source is 135 feet in depth and has a static water level of 17 fee below ground surface. <br /> • Frewert Road Class 1TI Disposal Site located at the western end of Frewert Road, Lathrop. <br /> This site is a former Class III solid waste disposal facility. <br /> `- • USGS Water well, located 0.62-mile east of the subject site. This unused federal drinling <br /> water source is 92 feet in depth. <br /> • USGS Water well, located 0.7-mile east of the subject site. This federal drinking water <br /> source is 170 feet in depth and has a static water level of 21 feet below ground surface. <br /> TEMUSEARCH, inc. Page 8 <br />