Laserfiche WebLink
PUBLIL SSER-flCES oP4U�N .�.o <br /> z <br /> COUNTY <br /> SAN JOAQUIN CO <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> t.tFau <br /> 445 N. San Joaquin Street • P. 4$ o34 D• Stockton, CA 95201-0388 <br /> CG • <br /> RICHARD MOE AND LARRY MCLEAN <br /> M AND M AUTOMOTIVE <br /> 60 E TENTH ST u S 1995 <br /> TRACY CA 95376 <br /> RE: Former Underground Storage Tanks SITE CODE: 2554 <br /> 60 East Tenth Street <br /> Tracy, CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the Environmental Assessment dated March 10, 1995 prepared by Wright <br /> Environmental Services, Inc. for the above referenced site. <br /> The report contains a brief site history, describes the soil and groundwater investigation <br /> performed in December of 1994, presents the data obtained from the investigation and suggests <br /> a scope of work for further investigation and remediation based upon the data. <br /> The soil data from the investigation suggests that soil contamination remains in the vicinity of <br /> the former UST location. Soil contamination has been determined to be bounded by B-4, and B-5 <br /> and to extend north of MW-1. Groundwater at this site is usually encountered at a depth of 14 <br /> feet. The report estimates that there is 130 yards of contaminated soil. Overexcavation has been <br /> proposed as the methodology to remediate this soil. <br /> The groundwater data suggests the presence of a plume beneath the site. MW-1, B-3, and B-5 <br /> are within the plume. Groundwater samples from B-I and B-4 were not submitted for analysis <br /> during this investigation. Evidence indicates that B-1 is within the plume however the evidence <br /> for the existence of the plume in the area of B-4 is inconclusive. <br /> A detection limit of 200 ppb was used in the TPH-g analysis of the December 19, 1994 <br /> groundwater samples from the monitoring wells. This is four times the 50 ppb detection limit <br /> recommended in the Tri-Regional Guidelines for this analyte. The presence of TPH-g in the area <br /> of MW-3 and MW-2 is inconclusive at this time. <br /> The proper detection limits were used in the groundwater analyses of water samples from the <br /> monitoring wells for Benzene, Toluene, Ethylbenzene and Xylenes (BTEX). Analysis of ground <br /> water from MW-2 and MW-3 is non detectable (ND) for BTEX indicating a zero line for the <br /> plume. MWA showes high levels of these constituents and is therefore within the plume. <br /> A Division of San Joaquin County Health Care Services <br />