Laserfiche WebLink
_-IN <br /> Vicki McCartney <br /> i <br /> From: Vicki McCartney <br /> Sent: Friday, January 24, 2003 4:16 PM <br /> To: 'david.herzog@shawgrp.com' <br /> Subject: 3250 W. Hammer Lane.in Stockton <br /> David, <br /> In response to your telephone call on January 22, 2003, 1 did review the Additional Assessment and Interim Remediation <br /> Report submitted by Shaw Environmental and Infrastructure, Inc. on November 8, 2002 for the site at 3250 West Hammer <br /> Lane in Stockton. After reviewing the report and data, I am not certain that the vertical and lateral extents of soil and <br /> groundwater contamination have been defined for this site. Can you pleaseltell me if a site conceptual model has been <br /> submitted for this location? Will you please check the methods used to analyze the soil-vapor samples? The methods <br /> listed on page 6 of the report are EPA Method 8020 for BTEX, and EPA Method 8260B for the five oxygenates. These are <br /> not methods for air samples. <br /> While reviewing the report I found the following corrections: <br /> • Change the TAME soil results to a range of 0.005 to 0.042 mg/kg from well borings MW-4 and MW-5. The range was <br /> reported as 0.66 to 4.5 mg/kg on page 7. <br /> • The groundwater samples were collected from MW-4 and MW-5 on July 29, 2002, not July 23, 2002, as indicated on <br /> page 7. <br /> • The results for MTBE, TAME, and TBA are reversed between the sample IDs System Effluent and Tank in Table 3. <br /> • The sample identification for the last sample in Table 4 is MW-1-H, not MW-1-F. <br /> I also reviewed the report for the fourth quarter 2002 groundwater monitoring event. This report is missing Table 1, Figure <br /> 1, and Figure 2. Please provide this information. <br /> Lastly, data have not been submitted to GeoTracker since the first quarter groundwater monitoring event for 2002. The <br /> data must be entered into GeoTracker as soon as possible. <br /> I plan to review previous reports and data and discuss this site with Nuel Henderson, Registered Geologist, in,our office. <br /> At that time I may need additional information before considering a Corrective Action Plan. <br /> Please let me know when i will receive the requested information and do not hesitate to call me at the number;fisted below <br /> if you have any questions. <br /> Vicki McCartney, EHS <br /> 304 E. Weber Avenue <br /> Stockton, CA 95202-2708 <br /> Phone (209) 468-3456 <br /> Fax (209) 468-3433 <br /> vmccartney@sjcehd.com <br /> i <br />