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Hk�2RY LORZ MICHAEL LORZ C p LODI CONCRETE PIPE SERVICE 381 W. TADDEi ROAD ACAMPO, CALIFORNIA 95220 (209) 369-3306 3 JANUARY, 1900 LAURIE A. COTULLA, tEHS PROGRAM " ANAGER ENVIRONMENTAL HEALTH DIVISION SAN JOAQUIN COUNTY PUBLIC HEALTH SERVICES P.0, Box 2000 STOCKTON, CALIFORNIA 95201 ENVIRONMENTAL HEALT PE.4915_QVtCE- DEAR "QRS. COTULLA, IN RE: SITE CODE: 1TS3 PURSUANT TO YOUR LETTER OF 11 DECEMBER, 1989 AND REMEDIATION PLAN ALREADY SUBMITTED, I HEREIN SUBMIT ADDITIONAL INFORMATION AS AN ADDENDUM TO OUR PREVIOUSLY SUBMITTED PROPOSAL REQUESTED BY YOUR DEPARTMENT. (1) ESTIMATE OF QUANTITY AND COMPOSITION OF THE LIQUID LEAKED (INCLUDING BASIS OF ESTIMATE) . AS WAS STATED IN OUR PROPOSAL, BOTH OF THE SUBJECT TANKS WERE USED SOLELY FOR THE STORAGE OF GASOLINE DURING THEIR LIFE. FURTHER, OVER THE YEARS, WE NOTED THAT THE VENDORS FILLING THESE TANKS OCCAS1LrkV%LLY LET A VERY SMALL QUANTITY OF MATERIAL DRIP WHEN FILLING OR DURING THE SUMMER WHEN THE TANKS WERE FILLED TO THE VERY TOP, EXPANSION LET A VERY SMALL QUANTITY OF MATERIAL OVERFLOW. BASED ON OUR OBSERVATIONS, WE ESTIMATE THAT DURING THE LIFE OF THE TANKS IN GROUND, A MAXIMUM OF TEN (10) GALLONS MAY HAVE LEAKED AROUND THE FILL PIPES. (2) nt PROPOSED PROGRAM, INCLUDING METHODOLOGY`TO DEFINE THE EXTENT OF SOIL AND GROUND WATER CONTAMINATION. SIS WAS PREVIOUSLY STATED IN OUR SUBMITTED PROPOSAL, WE INTEND TO REEXCAVATE THE CAVITY AND REMOVE AN ADDITIONAL FOUR ('-I') FEET FROM THE BO-{TOM OF THE PRIOR EXCAVATION. IN'E PROPOSE THAT A CERTIFIED LABORATORY WILL TAKE TWO (2) SAMPLES FROM THE NEW EXCAVATION AND TEST FOR THE CONSTITUENTS WHICH HAD SHOWN UP IN THE P,10R TESTING TO INCLUDE TEST # 8020 AND # 8015. 4E PROPOSE THAT THE TWO (2) M Accounts are due and payable on demand. Accounts over 60 days to bear interest at the rate of 1% per month. Work is guaranteed against defective workmanship for one year. Guarantee applies only if ditch is completely backfilled not earlier than three days or later than ten days after completion, and in any instance before water is put into pipeline. "Laid" price includes furnishings, delivery, laying and initial backfill of pipe in owner's properly prepared dry trench. Any additional materials and labor deemed necessary to complete a workable job and extra material and labor for wet, unstable or hardpan conditions are to be added and billed at our prevailing rates. "Trenching" — Ditch dug by machine is for normal conditions. Extra charge will be made for excessive hardpan, unstable condi- tions or any hard labor found necessary. In the event that legal action is required to enforce any provision of this agreement, the losing party in said action shall pay to the successful party reasonable attorney's fees and costs, as determined by any court of competent jurisdiction. All estimates, quotations, orders and contracts if affected by strikes, labor difficulties, lock-outs, accidents, acts of God, or other contingencies beyond our control, will be invalid. Time of delivery, performance or quotations will be extended or increased to the extent necessitated by any of said causes.