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Inquiry #1: Specification Section 68-2.02F Infiltration System requires that "the contractor must have the manufacturer ... supply shop drawings and structural load analysis consistent with section 3 f the Caltrans Bridge Design Specifications. The load calculations must be stamped by a California Registered Engineer. The load analysis must be consistent with H-20 loading"

Our understanding is that section 3 deals with concrete structures, not plastic flexible structures as called for in this project. Please clarify if you will in fact require the load calculations as described in the specification.

Inquiry submitted 09/26/2013

Response #1:Submitted for consideration.
Response posted 09/26/2013


Response #2:Yes, load calculations and analysis must be provided as specified in the contract documents.
Response posted 10/04/2013




Inquiry #2: We are concerned that the pre-approved plastic devices (Stormtank, Raintank)specified for the infiltration system will not support a traffic load and we are suspect that the companies can supply a load analysis consistent with Section 3 of the Caltrans Bridge Design Specifications which is a submittal requirement.

Considering these are pre-approved for use we assume these calculations have already been provided to Caltrans. Please present a copy of these for review so we can be confident to use these items in our bid.

Something we alternately considered is that the traffic loading requirements may not be applicable to this system since the system is located in a non-traffic area of the project. If this is the case please then confirm that this structural load analysis is not required.

Inquiry submitted 09/26/2013

Response #1:Submitted for consideration.
Response posted 09/26/2013


Response #2:These devices are not Caltrans pre-approved devices. Load calculations for these devices have not been provided to Caltrans. These devices may need to support maintenance vehicles; therefore, the load calculations and analysis specified in the contract documents is required.
Response posted 10/04/2013




Inquiry #3: Reference is made to Special Provision section 14-11.03 MATERIAL CONTAINING HAZARDOUS WASTE CONCENTRATIONS OF AERIALLY DEPOSITED LEAD, subsection 14-11.03A(2) Definitions Z-2. The concentrations provided have qualified the soil as an RCRA Hazardous Material. Are there reports available to prospective bidders to substantiate the lead levels? Further is it a requirement for the Z-2 soil to be hauled to a class 1 facility in California?


Inquiry submitted 10/17/2013

Response #1:Submitted for consideration.
Response posted 10/17/2013


Response #2:Please refer to Addendum No. 2, dated October 18, 2013. Yes, it is a requirement for the Z-2 soil to be hauled to a class 1 facility in California.
Response posted 10/22/2013




Inquiry #4: Per Spec page 21, section 14-8.02, construction equip & engines can not be operated between 7 PM to 7 AM or on Sunday, except to service traffic control facilities and construction equip. We assume by "service traffic control facilities" this includes the installation & removal of the K-Rail. Therefore all other work to deliver or export material must occur between 7 am and 7 pm without benefit of any shoulder or lane closures other than as provided in the current lane closure charts. We are concerned about trucks entering and leaving site without benefit of ramp / lane closure, especially locations 4 - 7. Please confirm this is intent and will be permitted.
Inquiry submitted 10/25/2013

Response #1:Submitted for consideration.
Response posted 10/25/2013


Response #2:Please refer to Addendum No. 3, dated October 28, 2013.
Response posted 10/28/2013




Inquiry #5: Material suppliers are indicating the Class 5 permeable as specified is not obtainable. The spec requires a washed, fine agg product that has at least 3% passing the #50 sieve but then no more than 4% passing the #100 and 0% passing the #200.
Will Caltrans allow commercially available Washed Concrete Sand? The WCS will meet the spec. for "effective particle size(ES)=(D10)" but will not meet the spec. for "Uniformity Coefficient Uc". The % passing limits proposed are as follows:
#50 sieve = 10-25
#100 sieve = 2-10
#200 sieve = 0-5

Inquiry submitted 10/28/2013

Response #1:Submitted for consideration.
Response posted 10/28/2013


Response #2:Submitted for consideration.
Response posted 10/28/2013


Response #3:Caltrans will not accept washed concrete sand because as the bidder notes it contains 0-5% passing the 200 sieve, which has caused high levels of turbidity and TSS on other past projects, mud in the discharge and will not meet the turbidity limits in the specfication. The 5% passing 200 sieve can cause violations of Regional Water Quality Control Basin plan requirements for discharge to surface waters. The purpose of the BMP is to remove pollutants from the watershed not be the source or sediment in a sediment impaired water body. 5% of the volume of the filter media is a large volume of silt and clay.

The Caltrans specifications has been bid and used previously on other Storm water projects. Please bid per the current contract documents.

Response posted 10/31/2013




Inquiry #6: Section 68-2.02F(1)Provides the contractor with (3) Infiltration System providers. I have only been able to contact one of the suppliers.(Brentwood), Price and Company sold their company to another distributor and ACO is based in the UK for which I have been unable to contact anyone. Please provide contact names and phone numbers for these suppliers.
Inquiry submitted 10/30/2013

Response #1:Submitted for consideration.
Response posted 10/30/2013


Response #2:Contact Information
Response posted 11/05/2013




Inquiry #7: Section 68-2.02F(1) Provides three manufactures for the Infiltration System chambers. The specification calls to use one of these products or equal. Are there any other manufactures approved by Caltrans to supply an or equal product for this application on this project?
Inquiry submitted 10/30/2013

Response #1:Submitted for consideration.
Response posted 10/30/2013


Response #2:No. Please bid per the current contract documents.
Response posted 11/05/2013




Inquiry #8: Section 14-11.03A(2) states the Type Z-2 Material will be transported and disposed of at a California Class 1 disposal site. Will the state allow this material to be delivered to an out of state Class 1 facility?
Inquiry submitted 10/30/2013

Response #1:Submitted for consideration.
Response posted 10/30/2013


Response #2:No, Type Z-2 Material will be transported and disposed of only within California.
Response posted 10/31/2013




Inquiry #9: Location No.5 Sheet 25 Shows an Austin Sand Filter. Where does the excavation for this item get paid?
Inquiry submitted 10/30/2013

Response #1:Submitted for consideration.
Response posted 10/31/2013


Response #2:Please refer to Plan Sheet No 30 Drainage Quantities DQ-3 and Item No 29 STRUCTURE EXCAVATION of the Bid Item List of the Special Provisions.
Response posted 10/31/2013




Inquiry #10: A question was asked from one of the trucking companies concerning the Z-2 Lead Dirt being removed from the project. They claim that the BOE, (Board Of Equalization) charges disposal fees in CA. These State taxes range from: $21.11 per ton (waste not meeting remediation requirements) to $5.72 per ton for remediation. They also claim that there is a possible, "Exemption From Generator Fee". EXEMPTIONS FROM THE GENERATOR FEE.
The following persons and waste are exempt from the generator fee:
(2) GOVERNMENT CLEANUPS. Hazardous wastes which result when a government agency, or its contractor, removes or remedies a release of hazardous waste in the state caused by another person, or natural disaster. A government agency that produces hazardous waste as a result of its normal operations, including but not limited to accidental releases that occur in the course of normal operations, or as part of a cleanup of a release of hazardous waste it caused, is subject to the fee. However, the government agency is not subject to the fee if the release of hazardous waste is caused by the public during public use of services provided by the government agency as part of its governmental activities, such as the providing of sewer service or roads used by the public.
The question is, does the BOE Exemption apply to Caltrans projects?

Inquiry submitted 10/31/2013

Response #1:Submitted for consideration.
Response posted 10/31/2013


Response #2:BOE exemption will not be taken for this project.
Response posted 11/01/2013




Inquiry #11: We are unable to reconcile roadway excavation quantity totals for BI's 27 & 28 as pertain to the Infiltration Systems. Quantities for Loc 7 & 8 appear close, but for location 3 it doesn't appear the excavation from OG to Top of Box was included. Location 6 total of 525 CY appears significantly low. Excavation from Top of Box to 18" below box, to 1' outside of box = 961 CY, plus there appears to be significant excavation from OG to Top of Box. Since cost will include shoring, stockpiling, possible export / import due to stockpile area shortage in some areas, etc., we feel it is important to understand how quantities were derived, or correct them. Please review.
Inquiry submitted 10/31/2013

Response #1:Submitted for consideration.
Response posted 10/31/2013


Response #2:Please refer to Addendum No. 4, dated November 8, 2013 for revised excavation quantities.
Response posted 11/12/2013




Inquiry #12: There are two clearing items in the proposal forms. Item No.26 Clearing and Grubbing and Item No.32 Roadside Clearing. In the Plant Removal Sheets 39-44 Roadside Clearing seems to encompass the whole area while Remove Ground Cover seems to be broken out separate. Then there is another area inside the ESA fence that is sectioned off but not called out. This is a three part question: What is the purpose of the ESA fence if work will be performed over the entire area? Is there a difference between remove ground cover, roadside clearing and the clearing work inside the ESA fence? How do all the items shown on the Plant Removal Plans get paid? (Prune Trees, Remove Ground Cover, Remove Trees, Remove Shrubs)
Inquiry submitted 10/31/2013

Response #1:Submitted for consideration.
Response posted 10/31/2013


Response #2:"ITEM NO. 26, CLEARING AND GRUBBING APPLIES TO AREAS OF WORK NOT RELATED TO SECTION 20, "LANDSCAPE"."

"ITEM NO. 32, ROADSIDE CLEARING APPLIES TO SECTION 20 RELATED WORK."

"ITEM NO. 33, PRUNE EXISTING PLANTS COVERS PAYMENT FOR PRUNING WORK."

"AREAS DESIGNATED ON THE PLANS AS "LANDSCAPE PROTECTION AREAS," ARE NOT AVAILABLE FOR CONSTRUCTION STAGING."

"FOR REVISED ROADSIDE CLEARING LIMITS SEE ADDENDA #4."
Response posted 11/12/2013




Inquiry #13: Bid Item 84 - 30" Alternative Pipe. Bid quantity is 50 LF.
DS 7 item f indicates 50 LF, DS 8 item e indicates 186 LF, for a total of 236 LF. Quantity sheet does not indicate quantity for DS 8. Please clarify reason for difference.

Inquiry submitted 11/05/2013

Response #1:Submitted for consideration.
Response posted 11/05/2013


Response #2:Please refer to Addendum No. 4, dated November 8, 2013 for revised quantities.
Response posted 11/12/2013




Inquiry #14: On Drainage units 2g and 3g the profiles call for a Width of 3' and a Length of 4' and see Drainage Details. There are no details addressing a modified G2 inlet. Please clarify.
Inquiry submitted 11/11/2013

Response #1:Submitted for consideration.
Response posted 11/12/2013


Response #2:Please bid per the current contract documents.
Response posted 11/12/2013






The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.03, “Examination of Plans, Specifications, Contract, and Site of Work,” of the Standard Specifications or any other provision of the contract, nor to excuse the contractor from full compliance with the contract. Bidders are cautioned that subsequent responses or contract addenda may change a previous response.