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�o. <br /> .P•�uN- C <br /> 0 SERviCESITEALT <br /> o <br /> PUBLIC <br /> z <br /> SAN JOAQUIN COUNTY { <br /> ENVIRONMENTAL HEALTH DIVISION <br /> M pH., Health Officer c;'FOR <br /> Karen Furst, M.D.' CA 95202 <br /> Third Floor • Stockton, <br /> 304 East Weber Avenue <br /> 20g1468-3420 FILE COPY <br /> GREG CARNEY <br /> E <br /> STOCKTON TERMINAL & ASTERN RR OCT 131999 <br /> 1330 N BROADWAY <br /> STOCKTON CA 95205 <br /> RE: Stockton Terminal & Eastern RR <br /> SITE CODE: 1726 <br /> 1282 N Shaw Road <br /> Stockton CA 95215 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) <br /> has reviewed the "Site Investigation and Closure Report" dated September 7, 1999, that <br /> was submitted by Upgradient Environmental Consultants on behalf of the above <br /> referenced site and has the following comments. <br /> The report details the subsurface soil investigation that was conducted at the site on <br /> August 24, 1999. Four soil borings were advanced to a maximum depth of 40-feet <br /> below surface grade (bsg). None of the borings extended to groundwater. Boring B-1, <br /> which was advanced in the former tank pit area, was the only boring to evidence <br /> contamination upon analysis of the collected samples. The sample from 15-feet bsg had <br /> 8,500 parts per million (ppm) total petroleum hydrocarbons as gasoline (TPHg), .89 parts <br /> per billion (ppb) ethylbenzene and 1.98 ppb xylene. The sample from 20-feet bsg had <br /> 9,100 ppm TPH as diesel, and .99 ppb xylene. <br /> The report makes the conclusion that this site meets the Tri-Regional Board Staff <br /> Recommendations, Appendix B, conditions for case closure with residual contamination <br /> left in place. However, the report did not include mass balance calculations for the <br /> remaining contamination, nor description of the fate and transport modeling used to <br /> support this conclusion. <br /> Attempted soil boring 13-3, located approximately 15 feet northwest of boring B-1, hit a <br /> perched layer of water at approximately 2-feet bsg. This water was determined to be the <br /> result of train engine washing activities in the area. Results of the laboratory analysis of <br /> this water evidenced 1,700,000-ppb TPHd, with a significant portion of this being oil- <br /> range compounds. Stockton Terminal & Eastern Railroad should suspend this improper <br /> disposal of wash water immediately. Pursuant to Section 6626.11, Title 22, California <br /> Code of Regulations it is the generators responsibility to determine if the waste (wash <br /> water) is hazardous. Once the waste is characterized, proper handling and disposal of <br /> the waste should be implemented. Please be advised that a "Notification of Hazardous <br /> Waste Discharge" has been made pursuant to Health and Safety Code Section 25180.7. <br /> A Division of San Joaquin County Health Care Services <br />