Laserfiche WebLink
Mr. Robert W. Chambers <br /> Page 2 <br /> September 21, 1989 <br /> The well samples should be analyzed for Aromatic Volatile <br /> Organics (EPA Method 602) and Polynuclear Aromatic <br /> Hydrocarbons (EPA Method 8310) as specified in the <br /> September 7 , 1988 workplan. These constituents need to be <br /> sampled at least twice from each well to confirm the initial <br /> analyses. Also, the apparent absence of contamination in the <br /> well samples analyzed to date must be reconciled with previous <br /> visual observations of ground water contamination in soil <br /> borings at the site. <br /> As previously stated in our letter of April 25 , 1989, a <br /> quantitative, health-based risk assessment of all the <br /> contaminants found at the site should be performed by your <br /> consultants to determine what potential risks may be <br /> associated with the proposed residential development of the <br /> site. You may also propose engineering and/or institutional <br /> measures and controls to eliminate or minimize the potential <br /> risks from contaminants at the site. Any additional <br /> submittals of soil sampling data without the corresponding <br /> evaluation of the potential risks will not lead to a <br /> resolution of these issues. We suggest that future workplans <br /> be reviewed by our office in advance. <br /> If you have any questions or would like to further discuss <br /> this matter, please call Mr. Harry Sneh of my staff at <br /> (916) 920-6368 or me at (916) 924-2181. <br /> Sincerely, <br /> James L. Tiosvold <br /> / Senior Waste Management <br /> Engineer <br /> cc: Fran Gottlieb <br /> Office of Assemblyman Johnston <br /> State Capitol, Room 4112 <br /> Sacramento, CA 95814 <br /> Robyn T. Blakley <br /> Director of Facilities Development <br /> Tracy Public Schools <br /> 315 East 11th Street <br /> Tracy, CA 95376 <br />