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ENVIRONMENTAL HEALTH ��l���'� <br /> �� [� '� �����{�}��0��� � ���� '�'�0����� � �L� DEPARTMENT <br /> � <br /> �� ���� ��� � ���TD�� �����T�����J <br /> ����"��nu � <br /> c�z���n .�����»������� Unit S,v,,wwon, <br /> Donna}{'R'mo`R'D'B`S' �04 ]�u»���cbcr/\vcoun, 7bicd }�\onr C»r|B»'�m^n'K6�B�3� <br /> D//rr/^/� Mike Huggins,R.E.D.S <br /> KDl <br /> A|0| m`R'E.D'S. Stockton, California 95202-2708 <br /> Douglas W.vVi\oon.K.E.H.S. <br /> ymg«mAM/'« n, Telephone: (200) 468'34ZU Mosnmt Lugoin.xI] <br /> R.E.H.S.. <br /> L:"ho �Cmoxx`B:-E.8.S. Dnbc�MCi6|on.K.E.HS <br /> p,�rmxmmmar Fax: (209) 4�4-0l3� <br /> xJu,kBvooUox.K.E.H.S. <br /> AYE8II B AYE8B <br /> 3525 EAGLE ROCK CIRCLE <br /> STOCKTON CA 95209 <br /> RE: Q365VV. Hwy 4 <br /> Stockton, CA <br /> San Joaquin County Environmental Health Department(EHD) has reviewed the "Limited <br /> Subsurface Investigation Report"dated January 18. 3005. prepared by Advanced <br /> GaoEnvironmenha\ Inc. (AGE)for the above referenced site. <br /> Two underground storage tanks (UST's)were removed from the site in May 1991. Laboratory <br /> analysis of the five soil samples collected beneath the UST's at the time of their removal showed <br /> that two of the samples had one part per million of total petroleum hydrocarbons in the soil <br /> sample. One of the two water samples collected from the UST pit at that time had low levels of <br /> petroleum contamination. <br /> In October 1994 monitoring well was installed in the former LIST area. The water from the <br /> monitoring well was sampled and tested twice with no contaminants found. The site was issued a <br /> No Further Action Required letter with respect to the UST's in February 1996 by EHD. <br /> No contaminants were found in the soil samples collected during the November 2004 <br /> investigation. Nocontaminants were found in the grab water samples collected from probe <br /> locations on the east site of the building where the former UST's were located. Agrab water <br /> sample from a probe location on the west side of the building had 40 parts per billion of MTBE. <br /> There were no contaminants found in the water sample collected from the on-site well that is near <br /> the probe location onthe west site ofthe building. The on-site well iuapparently only 35feet <br /> deep and the pump iaset ot30feet deep. <br /> The information provided does not indicate that the UST case should be reopened at this time. <br /> Data from grab groundwater samples are not strictly comparable to data from groundwater <br /> monitoring wells orshallow drinking water wells. |fyou decide tofurther investigate the <br /> contamination found in the grab water sample, a work plan should be submitted to EHD. <br /> |fyou have any questions contact meat(2OQ)4G8-344U. <br /> Donna Haron. FlEHS. Director <br /> Environmental Health Department <br /> ` <br /> Margaret Lagnho. Supervising REMS <br /> Unit IV <br />