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PUBLIC HhALTH SERVICES ,oQQU�k <br /> SAN JOAQUIN COUNTY z: ..G <br /> T" :2 <br /> ENVIRONMENTAL HEALTH DIVISION i' <br /> Karen Furst, M.D., M.P.H., Health Officer �. P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 2091468-3420 <br /> MARTIN HARRIS <br /> ,JUN O S 200 <br /> 5151 ALMONDWOOD DRIVE <br /> MANTECA CA 95337 <br /> RE: Tuff Boy Trailers SITE CODE: 1424 <br /> 5151 Almondwood Drive <br /> Manteca CA 95337 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the Groundwater Monitoring Well Installation Report dated April 18, 2001 that was <br /> prepared by Ground Zero Analysis, Inc. on your behalf and has the following comments. <br /> The Report documents site fieldwork that took place on January 22, 2001 when four shallow <br /> groundwater monitoring wells were installed on site. Soil samples for analysis were collected <br /> from each of the four borings. Soil boring MW-1, which is located closest to the former tank <br /> pit area at this site, was the only boring that exhibited evidence of petroleum hydrocarbon <br /> contamination. However, analytical results were positive for total petroleum hydrocarbons as <br /> gasoline (TPHg) in only one sample, the sample collected at five feet below surface grade <br /> (bsg). All other soil analytical results were reported as non-detect. Contaminant distribution <br /> in soil appears to be confined to the area within a forty foot radius of the former tank pit, to a <br /> depth between ten and fifteen feet bsg. <br /> The monitoring wells were developed and sampled on January 23, 2001. All four wells had <br /> minor detections of petroleum hydrocarbon contaminants or fuel additives, with the highest <br /> levels noted in MW-1 at 730 micrograms per liter (µg11) TPHg. Groundwater flow direction <br /> was determined to be towards the west. <br /> The report recommends continued groundwater monitoring. The report also recommends <br /> on-site management of the soil cuttings, based upon the non-detect analytical result from a <br /> composite sample. PHS/EHD concurs with both of these recommendations. Quarterly <br /> groundwater monitoring and sampling should be initiated at this site and must continue until <br /> directed otherwise by PHS/EHD. <br /> If you have any questions or comments please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Lori Duncan, Senior REHS Dot Lofstrom, R.G. <br /> LOP/Site Mitigation Unit IV Engineering Geologist <br /> cc: Marty Hartzell, CVRWQCB <br /> John Lane, Ground Zero Analysis <br /> A Division of San Joaquin County Health Care Services <br />