Laserfiche WebLink
Advanced <br /> GeoEnvironmental, Inc . ; =- <br /> 06 October 2003 RDC ENED <br /> AGE-NC Project No.03-1045 <br /> Ms. Margaret Lagorio <br /> OCT. 9 2003. <br /> SAN JOAQUIN COUNTY PHS-EHD ENVIRONMENT FILALTH <br /> 304 East Weber Avenue, 3rd Floor PERMIT/SERVICES <br /> Stockton, CA 95201 <br /> Subject: Revision to Preliminary Site Assessment Report-August 2003 <br /> Lopez Property <br /> 1601 Turnpike Road, Stockton, California <br /> Dear Ms. Lagorio: <br /> On behalf ofMr.Steve Dunn,Advanced GeoEnvironmental,Inc.(AGE)has revised the August 2003 <br /> Preliminary Site Assessment Report of hydrocarbon-impacted soil and ground water at 1601 <br /> Turnpike Road, Stockton, California. The revision include: (1) clarification of previous site <br /> assessment activities and(2)AGE's reasoning for determination of the tank pit boring location. <br /> BACKGROUND <br /> One 1,000-gallon leaded gasoline UST was removed in October 1987; a representative of the San <br /> Joaquin Environmental Health Department(SJCEHD)noted hydrocarbon odor and soil discoloration <br /> at the time of removal.Soil samples were collected at 15 feetbelow surface grade(bsg)and analyzed <br /> for gasoline, diesel,kerosene,motor oil,benzene,toluene,ethyl benzene,xylene(BTEX)and lead; <br /> the analytical results showed non-detect for all analytes except lead(5.5 milligrams per kilogram: <br /> mgflcg). However, the case was not ciosed because; a chain of custody was never submitted, them <br /> was missing documentation, and there was a discrepancy between the SJCEHD evaluation and the <br /> analytical results. An Unauthorized Release Report (UAR) was issued by the SJCEHD in March <br /> 1994 to facilitate further site assessment. <br /> As a result, one soil boring was advanced through what was believed to be the former tank <br /> excavation to a depth of 15 feet bsg on 04 June 1996. However, the SJCEHD was notified that the <br /> sample had been lost and the site was re-sampled on 20 June 1996 at a depth of 16 feet bsg. The <br /> analytical data for the 20 June 1996 sampling indicated non-detect for gasoline,BTEX and the fuel <br /> oxygenate compound methyl-tert-butyl-ether(MTBE).The laboratory quality assurance procedures <br /> were questioned by the SJCEHD and resolved in December 1996. The property was given a "no <br /> further action" letter and"closed by the SJCEHD in May 1997. <br /> 837 Shaw Road,Stockton,California 95215 <br /> Telephone(209)467-1006 FAX(209) 467-1118 <br />